<?php
/**
 * Subscription Object
 *
 * Extends WC_Order because the Edit Order/Subscription interface requires some of the refund related methods
 * from WC_Order that don't exist in WC_Abstract_Order (which would seem the more appropriate choice)
 *
 * @class    WC_Subscription
 * @version  1.0.0 - Migrated from WooCommerce Subscriptions v2.0
 * @package  WooCommerce Subscriptions/Classes
 * @category Class
 * @author   Brent Shepherd
 */

class WC_Subscription extends WC_Order {

	/** @public WC_Order Stores order data for the order in which the subscription was purchased (if any) */
	protected $order = null;

	/** @public string Order type */
	public $order_type = 'shop_subscription';

	/** @private int Stores get_payment_count when used multiple times */
	private $cached_payment_count = null;

	/**
	 * Which data store to load. WC 3.0+ property.
	 *
	 * @var string
	 */
	protected $data_store_name = 'subscription';

	/**
	 * This is the name of this object type. WC 3.0+ property.
	 *
	 * @var string
	 */
	protected $object_type = 'subscription';

	/**
	 * Stores the $this->is_editable() returned value in memory
	 *
	 * @var bool
	 */
	private $editable;

	/**
	 * Extra data for this object. Name value pairs (name + default value). Used to add additional information to parent.
	 *
	 * WC 3.0+ property.
	 *
	 * @var array
	 */
	protected $extra_data = array(

		// Extra data with getters/setters
		'billing_period'          => '',
		'billing_interval'        => 1,
		'suspension_count'        => 0,
		'requires_manual_renewal' => true,
		'cancelled_email_sent'    => false,
		'trial_period'            => '',
		'last_order_date_created' => null,

		// Extra data that requires manual getting/setting because we don't define getters/setters for it
		'schedule_trial_end'      => null,
		'schedule_next_payment'   => null,
		'schedule_cancelled'      => null,
		'schedule_end'            => null,
		'schedule_payment_retry'  => null,
		'schedule_start'          => null,

		'switch_data'             => array(),
	);

	/** @private array The set of valid date types that can be set on the subscription */
	protected $valid_date_types = array();

	/**
	 * List of properties deprecated for direct access due to WC 3.0+ & CRUD.
	 *
	 * @var array
	 */
	private $deprecated_properties = array(
		'start_date',
		'trial_end_date',
		'next_payment_date',
		'end_date',
		'last_payment_date',
		'order',
		'payment_gateway',
		'requires_manual_renewal',
		'suspension_count',
	);

	/**
	 * The meta key used to flag that the subscription's payment failed.
	 *
	 * Stored on the renewal order itself.
	 *
	 * Payments via the Block checkout transition the order status from failed to pending and then to processing.
	 * This makes it impossible for us to know if the order was initially failed. This meta key flags that the order was initially failed.
	 *
	 * @var string
	 */
	const RENEWAL_FAILED_META_KEY = '_failed_renewal_order';

	/**
	 * Initializes a specific subscription if the ID is passed, otherwise a new and empty instance of a subscription.
	 *
	 * This class should NOT be instantiated, instead the functions wcs_create_subscription() and wcs_get_subscription()
	 * should be used.
	 *
	 * @param int|WC_Subscription $subscription Subscription to read.
	 */
	public function __construct( $subscription = 0 ) {

		// Add subscription date types as extra subscription data.
		foreach ( wcs_get_subscription_date_types() as $date_type => $date_name ) {
			// The last payment date is derived from other sources and shouldn't be stored on a subscription.
			if ( 'last_payment' === $date_type ) {
				continue;
			}

			$date_type_key = wcs_maybe_prefix_key( $date_type, 'schedule_' );

			// Skip any custom dates which are already core date types.
			if ( ! isset( $this->extra_data[ $date_type_key ] ) ) {
				$this->extra_data[ $date_type_key ] = null;
			}
		}

		parent::__construct( $subscription );
		$this->order_type = 'shop_subscription';
	}

	/**
	 * Get internal type.
	 *
	 * @return string
	 */
	public function get_type() {
		return 'shop_subscription';
	}

	/**
	 * __isset function.
	 *
	 * @param mixed $key
	 * @return mixed
	 */
	public function __isset( $key ) {

		if ( ! wcs_is_woocommerce_pre( '3.0' ) && in_array( $key, $this->deprecated_properties ) ) {

			$is_set = true;

		} else {

			$is_set = parent::__isset( $key );

		}

		return $is_set;
	}

	/**
	 * Set deprecated properties via new methods.
	 *
	 * @param mixed $key
	 * @param mixed $value
	 * @return mixed
	 */
	public function __set( $key, $value ) {

		if ( in_array( $key, $this->deprecated_properties ) ) {

			switch ( $key ) {

				case 'order':
					$function = 'WC_Subscription::set_parent_id( $order_id )';
					$this->set_parent_id( wcs_get_objects_property( $value, 'id' ) );
					$this->order = $value;
					break;

				case 'requires_manual_renewal':
					$function = 'WC_Subscription::set_requires_manual_renewal()';
					$this->set_requires_manual_renewal( $value );
					break;

				case 'payment_gateway':
					$function = 'WC_Subscription::set_payment_method()';
					$this->set_payment_method( $value );
					break;

				case 'suspension_count':
					$function = 'WC_Subscription::set_suspension_count()';
					$this->set_suspension_count( $value );
					break;

				default:
					$function = 'WC_Subscription::update_dates()';
					$this->update_dates( array( $key => $value ) );
					break;
			}

			if ( ! wcs_is_woocommerce_pre( '3.0' ) ) {
				wcs_doing_it_wrong( $key, sprintf( 'Subscription properties should not be set directly as WooCommerce 3.0 no longer supports direct property access. Use %s instead.', $function ), '2.2.0' );
			}
		} else {

			$this->$key = $value;
		}
	}

	/**
	 * __get function.
	 *
	 * @param mixed $key
	 * @return mixed
	 */
	public function __get( $key ) {

		if ( in_array( $key, $this->deprecated_properties ) ) {

			switch ( $key ) {

				case 'order':
					$function = 'WC_Subscription::get_parent()';
					$value    = $this->get_parent();
					break;

				case 'requires_manual_renewal':
					$function = 'WC_Subscription::get_requires_manual_renewal()';
					$value    = $this->get_requires_manual_renewal() ? 'true' : 'false'; // We now use booleans for getter return values, so we need to convert it when being accessed via the old property approach to the string value returned
					break;

				case 'payment_gateway':
					$function = 'wc_get_payment_gateway_by_order( $subscription )';
					$value    = wc_get_payment_gateway_by_order( $this );
					break;

				case 'suspension_count':
					$function = 'WC_Subscription::get_suspension_count()';
					$value    = $this->get_suspension_count();
					break;

				default:
					$function = 'WC_Subscription::get_date( ' . $key . ' )';
					$value    = $this->get_date( $key );
					break;
			}

			if ( ! wcs_is_woocommerce_pre( '3.0' ) ) {
				wcs_doing_it_wrong( $key, sprintf( 'Subscription properties should not be accessed directly as WooCommerce 3.0 no longer supports direct property access. Use %s instead.', $function ), '2.2.0' );
			}
		} else {

			$value = parent::__get( $key );

		}

		return $value;
	}

	/**
	 * Checks if the subscription needs payment.
	 *
	 * A subscription requires payment if it:
	 *  - is pending or failed,
	 *  - has an unpaid parent order, or
	 *  - has an unpaid order or renewal order (and therefore, needs payment)
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 *
	 * @return bool True if the subscription requires payment, otherwise false.
	 */
	public function needs_payment() {
		$needs_payment = false;
		$parent_order  = $this->get_parent();

		// If the subscription is pending or failed and it has a total > 0, it needs payment.
		if ( parent::needs_payment() ) {
			$needs_payment = true;
		} elseif ( $parent_order && ( $parent_order->needs_payment() || $parent_order->has_status( array( 'on-hold', 'cancelled' ) ) ) ) {
			// If the subscription has an unpaid parent order, it needs payment.
			$needs_payment = true;
		} else {
			// Lastly, check if the last non-early renewal order needs payment.
			$order = wcs_get_last_non_early_renewal_order( $this );

			if ( $order && ( $order->needs_payment() || $order->has_status( array( 'on-hold', 'failed', 'cancelled' ) ) ) ) {
				$needs_payment = true;
			}
		}

		return apply_filters( 'woocommerce_subscription_needs_payment', $needs_payment, $this );
	}

	/**
	 * Check if the subscription's payment method supports a certain feature, like date changes.
	 *
	 * If the subscription uses manual renewals as the payment method, it supports all features.
	 * Otherwise, the feature will only be supported if the payment gateway set as the payment
	 * method supports for the feature.
	 *
	 * @param string $payment_gateway_feature one of:
	 *    'subscription_suspension'
	 *    'subscription_reactivation'
	 *    'subscription_cancellation'
	 *    'subscription_date_changes'
	 *    'subscription_amount_changes'
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function payment_method_supports( $payment_gateway_feature ) {

		if ( $this->is_manual() || ( false !== ( $payment_gateway = wc_get_payment_gateway_by_order( $this ) ) && $payment_gateway->supports( $payment_gateway_feature ) ) ) {
			$payment_gateway_supports = true;
		} else {
			$payment_gateway_supports = false;
		}

		return apply_filters( 'woocommerce_subscription_payment_gateway_supports', $payment_gateway_supports, $payment_gateway_feature, $this );
	}

	/**
	 * Check if a the subscription can be changed to a new status or date
	 */
	public function can_be_updated_to( $new_status ) {

		$new_status = ( 'wc-' === substr( $new_status, 0, 3 ) ) ? substr( $new_status, 3 ) : $new_status;

		switch ( $new_status ) {
			case 'pending':
				if ( $this->has_status( array( 'auto-draft', 'draft' ) ) ) {
					$can_be_updated = true;
				} else {
					$can_be_updated = false;
				}
				break;
			case 'completed': // core WC order status mapped internally to avoid exceptions
			case 'active':
				if ( $this->payment_method_supports( 'subscription_reactivation' ) && $this->has_status( 'on-hold' ) ) {
					// If the subscription's end date is in the past, it cannot be reactivated.
					$end_time = $this->get_time( 'end' );
					if ( 0 !== $end_time && $end_time < gmdate( 'U' ) ) {
						$can_be_updated = false;
					} else {
						$can_be_updated = true;
					}
				} elseif ( $this->has_status( 'pending' ) ) {
					$can_be_updated = true;
				} elseif ( $this->has_status( 'pending-cancel' ) && $this->get_time( 'end' ) > gmdate( 'U' ) && ( $this->is_manual() || ( false === $this->payment_method_supports( 'gateway_scheduled_payments' ) && $this->payment_method_supports( 'subscription_date_changes' ) && $this->payment_method_supports( 'subscription_reactivation' ) ) ) ) {
					$can_be_updated = true;
				} else {
					$can_be_updated = false;
				}
				break;
			case 'failed': // core WC order status mapped internally to avoid exceptions
			case 'on-hold':
				if ( $this->payment_method_supports( 'subscription_suspension' ) && $this->has_status( array( 'active', 'pending' ) ) ) {
					$can_be_updated = true;
				} else {
					$can_be_updated = false;
				}
				break;
			case 'cancelled':
				if ( $this->payment_method_supports( 'subscription_cancellation' ) && ( $this->has_status( 'pending-cancel' ) || ! $this->has_status( wcs_get_subscription_ended_statuses() ) ) ) {
					$can_be_updated = true;
				} else {
					$can_be_updated = false;
				}
				break;
			case 'pending-cancel':
				// Only active subscriptions can be given the "pending cancellation" status, because it is used to account for a prepaid term
				if ( $this->payment_method_supports( 'subscription_cancellation' ) ) {
					if ( $this->has_status( 'active' ) ) {
						$can_be_updated = true;
					} elseif ( ! $this->needs_payment() && $this->has_status( array( 'cancelled', 'on-hold' ) ) ) {
						// Payment completed and subscription is cancelled
						$can_be_updated = true;
					} else {
						$can_be_updated = false;
					}
				} else {
					$can_be_updated = false;
				}
				break;
			case 'expired':
				if ( ! $this->has_status( array( 'cancelled', 'trash', 'switched' ) ) ) {
					$can_be_updated = true;
				} else {
					$can_be_updated = false;
				}
				break;
			case 'trash':
				if ( $this->has_status( wcs_get_subscription_ended_statuses() ) || $this->can_be_updated_to( 'cancelled' ) ) {
					$can_be_updated = true;
				} else {
					$can_be_updated = false;
				}
				break;
			case 'deleted':
				if ( 'trash' == $this->get_status() ) {
					$can_be_updated = true;
				} else {
					$can_be_updated = false;
				}
				break;
			default:
				$can_be_updated = apply_filters( 'woocommerce_can_subscription_be_updated_to', false, $new_status, $this );
				break;
		}

		return apply_filters( 'woocommerce_can_subscription_be_updated_to_' . $new_status, $can_be_updated, $this );
	}

	/**
	 * Updates status of the subscription
	 *
	 * @param string $new_status Status to change the order to. No internal wc- prefix is required.
	 * @param string $note (default: '') Optional note to add
	 */
	public function update_status( $new_status, $note = '', $manual = false ) {

		if ( ! $this->get_id() ) {
			return;
		}

		// Standardise status names.
		$new_status     = ( 'wc-' === substr( $new_status, 0, 3 ) ) ? substr( $new_status, 3 ) : $new_status;
		$new_status_key = 'wc-' . $new_status;
		$old_status     = ( 'wc-' === substr( $this->get_status(), 0, 3 ) ) ? substr( $this->get_status(), 3 ) : $this->get_status();
		$old_status_key = 'wc-' . $old_status;

		if ( $new_status !== $old_status || ! in_array( $old_status_key, array_keys( wcs_get_subscription_statuses() ) ) ) {

			do_action( 'woocommerce_subscription_pre_update_status', $old_status, $new_status, $this );

			// Only update if possible
			if ( ! $this->can_be_updated_to( $new_status ) ) {

				// translators: %s: subscription status.
				$message = sprintf( __( 'Unable to change subscription status to "%s".', 'woocommerce-subscriptions' ), $new_status );

				$this->add_order_note( $message );

				do_action( 'woocommerce_subscription_unable_to_update_status', $this, $new_status, $old_status );

				// Let plugins handle it if they tried to change to an invalid status
				throw new Exception( $message );

			}

			try {

				$this->set_status( $new_status, $note, $manual );

				switch ( $new_status ) {

					case 'pending':
						// Nothing to do here
					break;

					case 'pending-cancel':
						// Store the subscription's end date and trial end date before overriding/deleting them.
						// Used for restoring the dates if the customer reactivates the subscription.
						$this->update_meta_data( 'end_date_pre_cancellation', $this->get_date( 'end' ) );
						$this->update_meta_data( 'trial_end_pre_cancellation', $this->get_date( 'trial_end' ) );

						$end_date = $this->calculate_date( 'end_of_prepaid_term' );

						// If there is no future payment and no expiration date set, or the end date is before now, the customer has no prepaid term (this shouldn't be possible as only active subscriptions can be set to pending cancellation and an active subscription always has either an end date or next payment), so set the end date and cancellation date to now
						if ( 0 == $end_date || wcs_date_to_time( $end_date ) < current_time( 'timestamp', true ) ) {
							$cancelled_date = $end_date = current_time( 'mysql', true );
						} else {
							// the cancellation date is now, and the end date is the end of prepaid term date
							$cancelled_date = current_time( 'mysql', true );
						}

						$this->delete_date( 'trial_end' );
						$this->delete_date( 'next_payment' );
						$this->update_dates(
							array(
								'cancelled' => $cancelled_date,
								'end'       => $end_date,
							)
						);
					break;

					case 'completed': // core WC order status mapped internally to avoid exceptions
					case 'active':

						if ( 'pending-cancel' === $old_status ) {
							$this->update_dates( array(
								'cancelled'    => 0,
								'end'          => $this->meta_exists( 'end_date_pre_cancellation' ) ? $this->get_meta( 'end_date_pre_cancellation' ) : 0,
								'trial_end'    => $this->meta_exists( 'trial_end_pre_cancellation' ) ? $this->get_meta( 'trial_end_pre_cancellation' ) : 0,
								'next_payment' => $this->get_date( 'end' ),
							) );
						} else {
							// Recalculate and set next payment date
							$stored_next_payment = $this->get_time( 'next_payment' );

							// Make sure the next payment date is more than 2 hours in the future by default
							if ( $stored_next_payment < ( gmdate( 'U' ) + apply_filters( 'woocommerce_subscription_activation_next_payment_date_threshold', 2 * HOUR_IN_SECONDS, $stored_next_payment, $old_status, $this ) ) ) { // also accounts for a $stored_next_payment of 0, meaning it's not set

								$calculated_next_payment = $this->calculate_date( 'next_payment' );

								if ( $calculated_next_payment > 0 ) {
									$this->update_dates( array( 'next_payment' => $calculated_next_payment ) );
								} elseif ( $stored_next_payment < gmdate( 'U' ) ) { // delete the stored date if it's in the past as we're not updating it (the calculated next payment date is 0 or none)
									$this->delete_date( 'next_payment' );
								}
							} else {
								// In case plugins want to run some code when the subscription was reactivated, but the next payment date was not recalculated.
								do_action( 'woocommerce_subscription_activation_next_payment_not_recalculated', $stored_next_payment, $old_status, $this );
							}
						}

						// Trial end date and end/expiration date don't change at all - they should be set when the subscription is first created
						wcs_make_user_active( $this->get_user_id() );
					break;

					case 'failed': // core WC order status mapped internally to avoid exceptions
					case 'on-hold':
						// Record date of suspension - 'post_modified' column?
						$this->set_suspension_count( $this->get_suspension_count() + 1 );
					break;
					case 'cancelled':
					case 'switched':
					case 'expired':
						$this->delete_date( 'trial_end' );
						$this->delete_date( 'next_payment' );

						$dates_to_update = array(
							'end' => current_time( 'mysql', true ),
						);

						// Also set the cancelled date to now if it wasn't set previously (when the status was changed to pending-cancellation)
						if ( 'cancelled' === $new_status && 0 == $this->get_date( 'cancelled' ) ) {
							$dates_to_update['cancelled'] = $dates_to_update['end'];
						}

						$this->update_dates( $dates_to_update );
					break;
				}

				// Make sure status is saved when WC 3.0+ is active, similar to WC_Order::update_status() with WC 3.0+ - set_status() can be used to avoid saving.
				$this->save();

			} catch ( Exception $e ) {
				// Log any exceptions to a WC logger
				$log        = new WC_Logger();
				$log_entry  = print_r( $e, true );
				$log_entry .= 'Exception Trace: ' . print_r( $e->getTraceAsString(), true );

				$log->add( 'wcs-update-status-failures', $log_entry );

				// Make sure the old status is restored
				$this->set_status( $old_status, $note, $manual );

				// There is no status transition
				$this->status_transition = false;

				// translators: 1: subscription status, 2: error message.
				$this->add_order_note( sprintf( __( 'Unable to change subscription status to "%1$s". Exception: %2$s', 'woocommerce-subscriptions' ), $new_status, $e->getMessage() ) );

				// Make sure status is saved when WC 3.0+ is active, similar to WC_Order::update_status() with WC 3.0+ - set_status() can be used to avoid saving.
				$this->save();

				do_action( 'woocommerce_subscription_unable_to_update_status', $this, $new_status, $old_status );

				throw $e;
			}
		}
	}

	/**
	 * Handle the status transition.
	 */
	protected function status_transition() {
		// Use local copy of status transition value.
		$status_transition = $this->status_transition;

		// Reset status transition variable.
		$this->status_transition = false;

		// If we're not currently in the midst of a status transition, bail early.
		if ( ! $status_transition ) {
			return;
		}

		try {
			do_action( "woocommerce_subscription_status_{$status_transition['to']}", $this );

			if ( ! empty( $status_transition['from'] ) ) {
				$transition_note = sprintf(
					/* translators: 1: old subscription status 2: new subscription status */
					__( 'Status changed from %1$s to %2$s.', 'woocommerce-subscriptions' ),
					wcs_get_subscription_status_name( $status_transition['from'] ),
					wcs_get_subscription_status_name( $status_transition['to'] )
				);

				do_action( "woocommerce_subscription_status_{$status_transition['from']}_to_{$status_transition['to']}", $this );

				// Trigger a hook with params we want.
				do_action( 'woocommerce_subscription_status_updated', $this, $status_transition['to'], $status_transition['from'] );

				// Trigger a hook with params matching WooCommerce's 'woocommerce_order_status_changed' hook so functions attached to it can be attached easily to subscription status changes.
				do_action( 'woocommerce_subscription_status_changed', $this->get_id(), $status_transition['from'], $status_transition['to'], $this );
			} else {
				/* translators: %s: new order status */
				$transition_note = sprintf( __( 'Status set to %s.', 'woocommerce-subscriptions' ), wcs_get_subscription_status_name( $status_transition['to'] ) );
			}

			// Note the transition occurred.
			$this->add_order_note( trim( "{$status_transition['note']} {$transition_note}" ), 0, $status_transition['manual'] );
		} catch ( Exception $e ) {
			$logger = wc_get_logger();
			$logger->error(
				sprintf( 'Status transition of subscription #%d errored!', $this->get_id() ),
				array(
					'order' => $this,
					'error' => $e,
				)
			);
			$this->add_order_note( __( 'Error during subscription status transition.', 'woocommerce-subscriptions' ) . ' ' . $e->getMessage() );
		}
	}

	/**
	 * Checks if the subscription requires manual renewal payments.
	 *
	 * This differs to the @see self::get_requires_manual_renewal() method in that it also conditions outside
	 * of the 'requires_manual_renewal' property which would force a subscription to require manual renewal
	 * payments, like an inactive payment gateway or a site in staging mode.
	 *
	 * @access public
	 * @return bool
	 */
	public function is_manual() {
		$gateways_handler = WC_Subscriptions_Core_Plugin::instance()->get_gateways_handler_class();

		if ( WCS_Staging::is_duplicate_site() || true === $this->get_requires_manual_renewal() || false === $gateways_handler::has_available_payment_method( $this ) ) {
			$is_manual = true;
		} else {
			$is_manual = false;
		}

		return apply_filters( 'woocommerce_subscription_is_manual', $is_manual, $this );
	}

	/**
	 * Sets the subscription status.
	 *
	 * Overrides the WC Order set_status() function to handle 'draft' and 'auto-draft' statuses for a subscription.
	 *
	 * 'draft' and 'auto-draft' statuses are WP statuses applied to the post when a subscription is created via admin. When
	 * a subscription is being read from the database, and the status is set to the post's 'draft' or 'auto-draft' status, the
	 * subscription status is treated as the default status - 'pending'.
	 *
	 * @since 5.1.0
	 *
	 * @param string $new_status The new status.
	 * @param string $note       Optional. The note to add to the subscription.
	 * @param bool   $manual     Optional. Is the status change triggered manually? Default is false.
	 */
	public function set_status( $new_status, $note = '', $manual_update = false ) {
		if ( ! $this->object_read && in_array( $new_status, [ 'draft', 'auto-draft' ], true ) ) {
			$new_status = apply_filters( 'woocommerce_default_subscription_status', 'pending' );
		}

		return parent::set_status( $new_status, $note, $manual_update );
	}

	/**
	 * Get valid order status keys
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @return array details of change
	 */
	public function get_valid_statuses() {
		return array_keys( wcs_get_subscription_statuses() );
	}

	/**
	 * WooCommerce handles statuses without the wc- prefix in has_status, get_status and update_status, however in the database
	 * it stores it with the prefix. This makes it hard to use the same filters / status names in both WC's methods AND WP's
	 * get_posts functions. This function bridges that gap and returns the prefixed versions of completed statuses.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 * @return array By default: wc-processing and wc-completed
	 */
	public function get_paid_order_statuses() {
		$paid_statuses = array(
			'processing',
			'completed',
			'wc-processing',
			'wc-completed',
		);

		$custom_status = apply_filters( 'woocommerce_payment_complete_order_status', 'completed', $this->get_id(), $this );

		if ( '' !== $custom_status && ! in_array( $custom_status, $paid_statuses ) && ! in_array( 'wc-' . $custom_status, $paid_statuses ) ) {
			$paid_statuses[] = $custom_status;
			$paid_statuses[] = 'wc-' . $custom_status;
		}

		return apply_filters( 'woocommerce_subscriptions_paid_order_statuses', $paid_statuses, $this );
	}

	/**
	 * Get the number of payments for a subscription.
	 *
	 * Default payment count includes all renewal orders and potentially an initial order
	 * (if the subscription was created as a result of a purchase from the front end
	 * rather than manually by the store manager).
	 *
	 * @param  string       $payment_type Type of count (completed|refunded|net). Optional. Default completed.
	 * @param  string|array $order_types Type of order relation(s) to count. Optional. Default array(parent,renewal).
	 * @return integer Count.
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.6.0
	 */
	public function get_payment_count( $payment_type = 'completed', $order_types = '' ) {

		if ( empty( $order_types ) ) {
			$order_types = array( 'parent', 'renewal' );
		} elseif ( ! is_array( $order_types ) ) {
			$order_types = array( $order_types );
		}

		// Replace 'any' to prevent counting orders twice.
		$any_key = array_search( 'any', $order_types );
		if ( false !== $any_key ) {
			unset( $order_types[ $any_key ] );
			$order_types = array_merge( $order_types, array( 'parent', 'renewal', 'resubscribe', 'switch' ) );
		}

		// Ensure orders are only counted once and parent is counted before renewal for deprecated filter.
		$order_types = array_unique( $order_types );
		sort( $order_types );

		if ( ! is_array( $this->cached_payment_count ) ) {
			$this->cached_payment_count = array(
				'completed' => array(),
				'refunded'  => array(),
			);
		}

		// Keep a tally of the counts of all requested order types
		$total_completed_payment_count = $total_refunded_payment_count = 0;

		foreach ( $order_types as $order_type ) {
			// If not cached, calculate the payment counts otherwise use the cached version.
			if ( ! isset( $this->cached_payment_count['completed'][ $order_type ] ) ) {
				$completed_payment_count = $refunded_payment_count = 0;

				// Looping over the known orders is faster than database queries on large sites
				foreach ( $this->get_related_orders( 'all', $order_type ) as $related_order ) {
					if ( null !== $related_order->get_date_paid() ) {
						$completed_payment_count++;

						if ( $related_order->has_status( 'refunded' ) ) {
							$refunded_payment_count++;
						}
					}
				}
			} else {
				$completed_payment_count = $this->cached_payment_count['completed'][ $order_type ];
				$refunded_payment_count  = $this->cached_payment_count['refunded'][ $order_type ];
			}

			// Store the payment counts to avoid hitting the database again
			$this->cached_payment_count['completed'][ $order_type ] = apply_filters( "woocommerce_subscription_{$order_type}_payment_completed_count", $completed_payment_count, $this, $order_type );
			$this->cached_payment_count['refunded'][ $order_type ]  = apply_filters( "woocommerce_subscription_{$order_type}_payment_refunded_count", $refunded_payment_count, $this, $order_type );

			$total_completed_payment_count += $this->cached_payment_count['completed'][ $order_type ];
			$total_refunded_payment_count  += $this->cached_payment_count['refunded'][ $order_type ];
		}

		switch ( $payment_type ) {
			case 'completed':
				$count = $total_completed_payment_count;

				/**
				 * Previously the @see WC_Subscription::get_completed_payment_count() function would filter the completed renewal and parent order count as a combined total.
				 * To remain backwards compatible, we need to apply that filter but only if we're getting the parent and renewal order completed count.
				 */
				if ( array( 'parent', 'renewal' ) === $order_types ) {
					$count = $this->apply_deprecated_completed_payment_count_filter( $count );
				}
				break;
			case 'refunded':
				$count = $total_refunded_payment_count;
				break;
			case 'net':
				$count = $total_completed_payment_count - $total_refunded_payment_count;
				break;
			default:
				$count = 0;
				break;
		}

		return $count;
	}

	/**
	 * Get the number of payments failed
	 *
	 * Failed orders are the number of orders that have wc-failed as the status
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function get_failed_payment_count() {

		$failed_payment_count = ( ( $parent_order = $this->get_parent() ) && $parent_order->has_status( 'failed' ) ) ? 1 : 0;

		foreach ( $this->get_related_orders( 'all', 'renewal' ) as $renewal_order ) {
			if ( $renewal_order->has_status( 'failed' ) ) {
				$failed_payment_count++;
			}
		}

		return apply_filters( 'woocommerce_subscription_payment_failed_count', $failed_payment_count, $this );
	}

	/**
	 * Returns the total amount charged at the outset of the Subscription.
	 *
	 * This may return 0 if there is a free trial period or the subscription was synchronised, and no sign up fee,
	 * otherwise it will be the sum of the sign up fee and price per period.
	 *
	 * @return float The total initial amount charged when the subscription product in the order was first purchased, if any.
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function get_total_initial_payment() {
		$initial_total = ( $parent_order = $this->get_parent() ) ? $parent_order->get_total() : 0;
		return apply_filters( 'woocommerce_subscription_total_initial_payment', $initial_total, $this );
	}

	/**
	 * Get billing period.
	 *
	 * @return string
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function get_billing_period( $context = 'view' ) {
		return $this->get_prop( 'billing_period', $context );
	}

	/**
	 * Get billing interval.
	 *
	 * @return string
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function get_billing_interval( $context = 'view' ) {
		return $this->get_prop( 'billing_interval', $context );
	}

	/**
	 * Get trial period.
	 *
	 * @return string
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function get_trial_period( $context = 'view' ) {
		return $this->get_prop( 'trial_period', $context );
	}

	/**
	 * Get suspension count.
	 *
	 * @return int
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function get_suspension_count( $context = 'view' ) {
		return $this->get_prop( 'suspension_count', $context );
	}

	/**
	 * Checks if the subscription requires manual renewal payments.
	 *
	 * @access public
	 * @return bool
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function get_requires_manual_renewal( $context = 'view' ) {
		return $this->get_prop( 'requires_manual_renewal', $context );
	}

	/**
	 * Get the switch data.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @return string
	 */
	public function get_switch_data( $context = 'view' ) {
		return $this->get_prop( 'switch_data', $context );
	}

	/**
	 * Get the flag about whether the cancelled email has been sent or not.
	 *
	 * @return string
	 */
	public function get_cancelled_email_sent( $context = 'view' ) {
		return $this->get_prop( 'cancelled_email_sent', $context );
	}

	/**
	 * The subscription last order created date.
	 *
	 * @return string
	 */
	public function get_last_order_date_created( $context = 'view' ) {
		return $this->get_prop( 'last_order_date_created', $context );
	}

	/*** Setters *****************************************************/

	/**
	 * Set billing period.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param string $value
	 */
	public function set_billing_period( $value ) {
		$this->set_prop( 'billing_period', $value );
	}

	/**
	 * Set billing interval.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param int $value
	 */
	public function set_billing_interval( $value ) {
		$this->set_prop( 'billing_interval', (string) absint( $value ) );
	}

	/**
	 * Set trial period.
	 *
	 * @param string $value
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function set_trial_period( $value ) {
		$this->set_prop( 'trial_period', $value );
	}

	/**
	 * Set suspension count.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param int $value
	 */
	public function set_suspension_count( $value ) {
		$this->set_prop( 'suspension_count', absint( $value ) );
	}

	/**
	 * Set schedule start date.
	 *
	 * This function should not be used. It only exists to support setting the start date on subscription creation without
	 * having to call update_dates() which results in a save.
	 *
	 * The more aptly named set_schedule_start() cannot exist because then WC core thinks the _schedule_start meta is an
	 * internal meta key and throws errors.
	 *
	 * @param string $schedule_start The date to set the start date to. Should be a WC_DateTime or a string in the format 'Y-m-d H:i:s' (UTC).
	 */
	public function set_start_date( $schedule_start ) {
		$this->set_date_prop( 'start', is_a( $schedule_start, 'WC_DateTime' ) ? $schedule_start : wcs_date_to_time( $schedule_start ) );
	}

	/**
	 * Set schedule trial end date.
	 *
	 * Note: This function is intended for internal use only and should not be accessed directly.
	 * It only exists to support setting the trial end date prop from the data store.
	 * Calling this function does not automatically schedule the trial end date as a Scheduled Action.
	 *
	 * Use WC_Subscription::update_dates() instead.
	 *
	 * @param string $schedule_trial_end
	 */
	public function set_trial_end_date( $schedule_trial_end ) {
		$this->set_prop( 'schedule_trial_end', $schedule_trial_end );
	}

	/**
	 * Set schedule next payment date.
	 *
	 * Note: This function is intended for internal use only and should not be accessed directly.
	 * It only exists to support setting the next payment date prop from the data store.
	 * Calling this function does not automatically schedule the next payment date as a Scheduled Action.
	 *
	 * Use WC_Subscription::update_dates() instead.
	 *
	 * @param string $schedule_next_payment
	 */
	public function set_next_payment_date( $schedule_next_payment ) {
		$this->set_prop( 'schedule_next_payment', $schedule_next_payment );
	}

	/**
	 * Set schedule cancelled date.
	 *
	 * Note: This function is intended for internal use only and should not be accessed directly.
	 * It only exists to support setting the cancelled date prop from the data store.
	 *
	 * Use WC_Subscription::update_dates() instead.
	 *
	 * @param string $schedule_cancelled
	 */
	public function set_cancelled_date( $schedule_cancelled ) {
		$this->set_prop( 'schedule_cancelled', $schedule_cancelled );
	}

	/**
	 * Set schedule end date.
	 *
	 * Note: This function is intended for internal use only and should not be accessed directly.
	 * It only exists to support setting the end date prop from the data store.
	 * Calling this function does not automatically schedule the end date as a Scheduled Action.
	 *
	 * Use WC_Subscription::update_dates() instead.
	 *
	 * @param string $schedule_end
	 */
	public function set_end_date( $schedule_end ) {
		$this->set_prop( 'schedule_end', $schedule_end );
	}

	/**
	 * Set schedule payment retry date.
	 *
	 * Note: This function is intended for internal use only and should not be accessed directly.
	 * It only exists to support setting the payment retry date prop from the data store.
	 * Calling this function does not automatically schedule the payment retry date as a Scheduled Action.
	 *
	 * Use WC_Subscription::update_dates() instead.
	 *
	 * @param string $schedule_payment_retry
	 */
	public function set_payment_retry_date( $schedule_payment_retry ) {
		$this->set_prop( 'schedule_payment_retry', $schedule_payment_retry );
	}

	/**
	 * Set parent order ID. We don't use WC_Abstract_Order::set_parent_id() because we want to allow false
	 * parent IDs, like 0.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param int $value
	 */
	public function set_parent_id( $value ) {
		$this->set_prop( 'parent_id', absint( $value ) );
		$this->order = null;
	}

	/**
	 * Set the manual renewal flag on the subscription.
	 *
	 * The manual renewal flag is stored in database as string 'true' or 'false' when set, and empty string when not set
	 * (which means it doesn't require manual renewal), but we want to consistently use it via get/set as a boolean,
	 * for sanity's sake.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param bool $value
	 */
	public function set_requires_manual_renewal( $value ) {

		if ( ! is_bool( $value ) ) {
			if ( 'false' === $value || '' === $value ) {
				$value = false;
			} else { // default to require manual renewal for all other values, which may often includes string 'true' or some invalid value
				$value = true;
			}
		}

		$this->set_prop( 'requires_manual_renewal', $value );
	}

	/**
	 * Set the switch data on the subscription.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function set_switch_data( $value ) {
		$this->set_prop( 'switch_data', $value );
	}

	/**
	 * Set the flag about whether the cancelled email has been sent or not.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 */
	public function set_cancelled_email_sent( $value ) {
		$this->set_prop( 'cancelled_email_sent', $value );
	}

	/**
	 * Set the subscription last order created date.
	 */
	public function set_last_order_date_created( $value ) {
		$this->set_prop( 'last_order_date_created', $value );
	}

	/*** Date methods *****************************************************/

	/**
	 * Get the MySQL formatted date for a specific piece of the subscriptions schedule
	 *
	 * @param string $date_type 'date_created', 'trial_end', 'next_payment', 'last_order_date_created' or 'end'
	 * @param string $timezone The timezone of the $datetime param, either 'gmt' or 'site'. Default 'gmt'.
	 * @param array $exclude_statuses An array of subscription statuses to exclude from the date calculation.
	 */
	public function get_date( $date_type, $timezone = 'gmt', $exclude_statuses = array() ) {

		$date_type = wcs_normalise_date_type_key( $date_type, true );

		if ( empty( $date_type ) ) {
			$date = 0;
		} else {
			switch ( $date_type ) {
				case 'date_created':
					$date = $this->get_date_created();
					$date = is_null( $date ) ? wcs_get_datetime_from( get_the_date( 'Y-m-d H:i:s', $this->get_id() ) ) : $date; // When a post is first created via the Add Subscription screen, it has a post_date but not a date_created value yet
					break;
				case 'date_modified':
					$date = $this->get_date_modified();
					break;
				case 'date_paid':
					$date = $this->get_date_paid();
					break;
				case 'date_completed':
					$date = $this->get_date_completed();
					break;
				case 'last_order_date_created':
					$date = $this->get_related_orders_date( 'date_created', 'last', $exclude_statuses );
					break;
				case 'last_order_date_paid':
					$date = $this->get_related_orders_date( 'date_paid', 'last', $exclude_statuses );
					break;
				case 'last_order_date_completed':
					$date = $this->get_related_orders_date( 'date_completed', 'last', $exclude_statuses );
					break;
				default:
					$date = $this->get_date_prop( $date_type );
					break;
			}

			if ( is_null( $date ) ) {
				$date = 0;
			}
		}

		if ( is_a( $date, 'DateTime' ) ) {
			// Don't change the original date object's timezone as this may affect the prop stored on the subscription
			$date = clone $date;

			// WC's return values use site timezone by default
			if ( 'gmt' === strtolower( $timezone ) ) {
				$date->setTimezone( new DateTimeZone( 'UTC' ) );
			}

			$date = $date->date( 'Y-m-d H:i:s' );
		}

		return apply_filters( 'woocommerce_subscription_get_' . $date_type . '_date', $date, $this, $timezone );
	}

	/**
	 * Get the stored date.
	 *
	 * Used for WC 3.0 compatibility and for WC_Subscription_Legacy to override.
	 *
	 * @param string $date_type 'trial_end', 'next_payment', 'last_order_date_created', 'cancelled', 'payment_retry' or 'end'
	 * @return WC_DateTime|NULL object if the date is set or null if there is no date.
	 */
	protected function get_date_prop( $date_type ) {
		return $this->get_prop( $this->get_date_prop_key( $date_type ) );
	}

	/**
	 * Set the stored date.
	 *
	 * Used for WC 3.0 compatibility and for WC_Subscription_Legacy to override.
	 *
	 * @param string $date_type 'trial_end', 'next_payment', 'cancelled', 'payment_retry' or 'end'
	 * @param string|integer|null $date UTC timestamp, or ISO 8601 DateTime. If the DateTime string has no timezone or offset, WordPress site timezone will be assumed. Null if their is no date.
	 */
	protected function set_date_prop( $date_type, $value ) {
		parent::set_date_prop( $this->get_date_prop_key( $date_type ), $value );
	}

	/**
	 * Get the key used to refer to the date type in the set of props
	 *
	 * @param string $date_type 'trial_end', 'next_payment', 'last_order_date_created', 'cancelled', 'payment_retry' or 'end'
	 * @return string The key used to refer to the date in props
	 */
	protected function get_date_prop_key( $date_type ) {
		$prefixed_date_type = wcs_maybe_prefix_key( $date_type, 'schedule_' );
		return array_key_exists( $prefixed_date_type, $this->extra_data ) ? $prefixed_date_type : $date_type;
	}

	/**
	 * Get date_paid prop of most recent related order that has been paid.
	 *
	 * A subscription's paid date is actually determined by the most recent related order,
	 * with a paid date set, not a prop on the subscription itself.
	 *
	 * @param  string $context
	 * @return WC_DateTime|NULL object if the date is set or null if there is no date.
	 */
	public function get_date_paid( $context = 'view' ) {
		return $this->get_related_orders_date( 'date_paid' );
	}

	/**
	 * Set date_paid.
	 *
	 * A subscription's paid date is actually determined by the last order, not a prop on WC_Subscription.
	 *
	 * @param  string|integer|null $date UTC timestamp, or ISO 8601 DateTime. If the DateTime string has no timezone or offset, WordPress site timezone will be assumed. Null if their is no date.
	 * @throws WC_Data_Exception
	 */
	public function set_date_paid( $date = null ) {
		$this->set_last_order_date( 'date_paid', $date );
	}

	/**
	 * Get date_completed.
	 *
	 * A subscription's completed date is actually determined by the last order, not a prop.
	 *
	 * @param string $context
	 * @return WC_DateTime|NULL object if the date is set or null if there is no date.
	 */
	public function get_date_completed( $context = 'view' ) {
		return $this->get_related_orders_date( 'date_completed' );
	}

	/**
	 * Set date_completed.
	 *
	 * A subscription's completed date is actually determined by the last order, not a prop.
	 *
	 * @param  string|integer|null $date UTC timestamp, or ISO 8601 DateTime. If the DateTime string has no timezone or offset, WordPress site timezone will be assumed. Null if their is no date.
	 * @throws WC_Data_Exception
	 */
	public function set_date_completed( $date = null ) {
		$this->set_last_order_date( 'date_completed', $date );
	}

	/**
	 * Get a certain date type for the most recent order on the subscription with that date type,
	 * or the last order, if the order type is specified as 'last'.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param string $date_type Any valid WC 3.0 date property, including 'date_paid', 'date_completed', 'date_created', or 'date_modified'
	 * @param string $order_type The type of orders to return, can be 'last', 'parent', 'switch', 'renewal' or 'any'. Default 'any'. Use 'last' to only check the last order.
	 * @param array  $exclude_statuses An array of subscription statuses to exclude from the date calculation.
	 * @return WC_DateTime|NULL object if the date is set or null if there is no date.
	 */
	protected function get_related_orders_date( $date_type, $order_type = 'any', $exclude_statuses = array() ) {

		$date = null;

		if ( 'last' === $order_type ) {
			$last_order = $this->get_last_order( 'all', [ 'parent', 'renewal' ], $exclude_statuses );
			$date       = ( ! $last_order ) ? null : wcs_get_objects_property( $last_order, $date_type );
		} else {
			// Loop over orders until we find a valid date of this type or run out of related orders
			foreach ( $this->get_related_orders( 'all', $order_type ) as $related_order_id ) {
				$related_order = wc_get_order( $related_order_id );
				$date          = ( ! $related_order ) ? null : wcs_get_objects_property( $related_order, $date_type );
				if ( is_a( $date, 'WC_Datetime' ) ) {
					break;
				}
			}
		}

		return $date;
	}

	/**
	 * Set a certain date type for the last order on the subscription.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param string $date_type One of 'date_paid', 'date_completed', 'date_modified', or 'date_created'.
	 */
	protected function set_last_order_date( $date_type, $date = null ) {

		if ( $this->object_read ) {

			$setter     = 'set_' . $date_type;
			$last_order = $this->get_last_order( 'all' );

			if ( $last_order && is_callable( array( $last_order, $setter ) ) ) {
				$last_order->{$setter}( $date );
				$last_order->save();
			}
		}
	}

	/**
	 * Returns a string representation of a subscription date in the site's time (i.e. not GMT/UTC timezone).
	 *
	 * @param string $date_type 'date_created', 'trial_end', 'next_payment', 'last_order_date_created', 'end' or 'end_of_prepaid_term'
	 */
	public function get_date_to_display( $date_type = 'next_payment' ) {
		$date_type     = wcs_normalise_date_type_key( $date_type, true );
		$timestamp_gmt = $this->get_time( $date_type, 'gmt' );

		return $this->format_date_to_display( $timestamp_gmt, $date_type );
	}

	/**
	 * Formats a subscription date timestamp for display.
	 *
	 * @param int    $timestamp The subscription date in a timestamp format.
	 * @param string $date_type The subscription date type to display. @see WC_Subscription::get_valid_date_types()
	 *
	 * @return string The formatted date to display.
	 */
	public function format_date_to_display( $timestamp_gmt, $date_type ) {
		$date_type = wcs_normalise_date_type_key( $date_type, true );

		// Don't display next payment date when the subscription is inactive
		if ( 'next_payment' === $date_type && ! $this->has_status( 'active' ) ) {
			$timestamp_gmt = 0;
		}

		if ( $timestamp_gmt > 0 ) {
			$time_diff = $timestamp_gmt - current_time( 'timestamp', true );

			if ( $time_diff > 0 && $time_diff < WEEK_IN_SECONDS ) {
				// translators: placeholder is human time diff (e.g. "3 weeks")
				$date_to_display = sprintf( __( 'In %s', 'woocommerce-subscriptions' ), human_time_diff( current_time( 'timestamp', true ), $timestamp_gmt ) );
			} elseif ( $time_diff < 0 && absint( $time_diff ) < WEEK_IN_SECONDS ) {
				// translators: placeholder is human time diff (e.g. "3 weeks")
				$date_to_display = sprintf( __( '%s ago', 'woocommerce-subscriptions' ), human_time_diff( current_time( 'timestamp', true ), $timestamp_gmt ) );
			} else {
				$date_to_display = date_i18n( wc_date_format(), $timestamp_gmt + wc_timezone_offset() );
			}
		} else {
			switch ( $date_type ) {
				case 'end':
					$date_to_display = __( 'Not yet ended', 'woocommerce-subscriptions' );
					break;
				case 'cancelled':
					$date_to_display = __( 'Not cancelled', 'woocommerce-subscriptions' );
					break;
				case 'next_payment':
				case 'trial_end':
				default:
					$date_to_display = _x( '-', 'original denotes there is no date to display', 'woocommerce-subscriptions' );
					break;
			}
		}

		return apply_filters( 'woocommerce_subscription_date_to_display', $date_to_display, $date_type, $this );
	}

	/**
	 * Get the timestamp for a specific piece of the subscriptions schedule
	 *
	 * @param string $date_type 'date_created', 'trial_end', 'next_payment', 'last_order_date_created', 'end' or 'end_of_prepaid_term'
	 * @param string $timezone The timezone of the $datetime param. Default 'gmt'.
	 * @param array $exclude_statuses An array of subscription statuses to exclude from the date calculation.
	 */
	public function get_time( $date_type, $timezone = 'gmt', $exclude_statuses = array() ) {

		$datetime = $this->get_date( $date_type, $timezone, $exclude_statuses );
		$datetime = wcs_date_to_time( $datetime );

		return $datetime;
	}

	/**
	 * Set the dates on the subscription.
	 *
	 * Because dates are interdependent on each other, this function will take an array of dates, make sure that all
	 * dates are in the right order in the right format, that there is at least something to update.
	 *
	 * @param array $dates array containing dates with keys: 'date_created', 'trial_end', 'next_payment', 'last_order_date_created' or 'end'. Values are MySQL formatted date/time strings in UTC timezone.
	 * @param string $timezone The timezone of the $datetime param. Default 'gmt'.
	 */
	public function update_dates( $dates, $timezone = 'gmt' ) {
		$dates = $this->validate_date_updates( $dates, $timezone );

		// If an exception hasn't been thrown by this point, we can safely update the dates
		$is_updated = false;

		foreach ( $dates as $date_type => $datetime ) {

			if ( $datetime == $this->get_date( $date_type ) ) {
				continue;
			}

			// Delete dates with a 0 date time
			if ( 0 == $datetime ) {
				if ( ! in_array( $date_type, array( 'date_created', 'start', 'last_order_date_created', 'last_order_date_modified' ) ) ) {
					$this->delete_date( $date_type );
				}
				continue;
			}

			// WC_Data::set_date_prop() uses site timezone for MySQL date/time strings, but we have a string in UTC, so convert it to a timestamp, which WC_Data will treat as being in UTC. Or if we don't have a date, set it to null so WC_Data deletes it.
			$utc_timestamp = ( 0 === $datetime ) ? null : wcs_date_to_time( $datetime );

			switch ( $date_type ) {
				case 'date_created':
					$this->set_date_created( $utc_timestamp );
					$is_updated = true;
					break;
				case 'date_modified':
					$this->set_date_modified( $utc_timestamp );
					$is_updated = true;
					break;
				case 'date_paid':
					$this->set_date_paid( $utc_timestamp );
					$is_updated = true;
					break;
				case 'date_completed':
					$this->set_date_completed( $utc_timestamp );
					$is_updated = true;
					break;
				case 'last_order_date_created':
					$this->set_last_order_date( 'date_created', $utc_timestamp );
					$is_updated = true;
					break;
				case 'last_order_date_paid':
					$this->set_last_order_date( 'date_paid', $utc_timestamp );
					$is_updated = true;
					break;
				case 'last_order_date_completed':
					$this->set_last_order_date( 'date_completed', $utc_timestamp );
					$is_updated = true;
					break;
				default:
					$this->set_date_prop( $date_type, $utc_timestamp );
					$is_updated = true;
					break;
			}

			if ( $is_updated && true === $this->object_read ) {
				$this->save_dates();
				do_action( 'woocommerce_subscription_date_updated', $this, $date_type, $datetime );
			}
		}
	}

	/**
	 * Remove a date from a subscription.
	 *
	 * @param string $date_type 'trial_end', 'next_payment' or 'end'. The 'date_created' and 'last_order_date_created' date types will throw an exception.
	 */
	public function delete_date( $date_type ) {

		$date_type = wcs_normalise_date_type_key( $date_type, true );

		// Make sure some dates are before next payment date
		switch ( $date_type ) {
			case 'date_created':
				$message = __( 'The creation date of a subscription can not be deleted, only updated.', 'woocommerce-subscriptions' );
			break;
			case 'start':
				$message = __( 'The start date of a subscription can not be deleted, only updated.', 'woocommerce-subscriptions' );
			break;
			case 'last_order_date_created':
			case 'last_order_date_modified':
				// translators: %s: date type (e.g. "trial_end").
				$message = sprintf( __( 'The %s date of a subscription can not be deleted. You must delete the order.', 'woocommerce-subscriptions' ), $date_type );
			break;
			default:
				$message = '';
			break;
		}

		if ( ! empty( $message ) ) {
			// translators: %d: subscription ID.
			throw new Exception( sprintf( __( 'Subscription #%d: ', 'woocommerce-subscriptions' ), $this->get_id() ) . $message );
		}

		$this->set_date_prop( $date_type, 0 );

		if ( true === $this->object_read ) {
			$this->save_dates();
			do_action( 'woocommerce_subscription_date_deleted', $this, $date_type );
		}
	}

	/**
	 * Check if a given date type can be updated for this subscription.
	 *
	 * @param string $date_type 'date_created', 'trial_end', 'next_payment', 'last_order_date_created' or 'end'
	 */
	public function can_date_be_updated( $date_type ) {

		switch ( $date_type ) {
			case 'start':
			case 'date_created':
				if ( $this->has_status( array( 'auto-draft', 'pending' ) ) ) {
					$can_date_be_updated = true;
				} else {
					$can_date_be_updated = false;
				}
				break;
			case 'trial_end':
				if ( isset( $this->cached_payment_count['completed'] ) ) {
					$this->cached_payment_count = null;
				}

				if ( $this->get_payment_count() < 2 && ! $this->has_status( wcs_get_subscription_ended_statuses() ) && ( $this->has_status( 'pending' ) || $this->payment_method_supports( 'subscription_date_changes' ) ) ) {
					$can_date_be_updated = true;
				} else {
					$can_date_be_updated = false;
				}
				break;
			case 'next_payment':
			case 'end':
				if ( ! $this->has_status( wcs_get_subscription_ended_statuses() ) && ( $this->has_status( 'pending' ) || $this->payment_method_supports( 'subscription_date_changes' ) ) ) {
					$can_date_be_updated = true;
				} else {
					$can_date_be_updated = false;
				}
				break;
			case 'last_order_date_created':
				$can_date_be_updated = true;
				break;
			default:
				$can_date_be_updated = false;
				break;
		}

		return apply_filters( 'woocommerce_subscription_can_date_be_updated', $can_date_be_updated, $date_type, $this );
	}

	/**
	 * Calculate a given date for the subscription in GMT/UTC.
	 *
	 * This function is primarily used when the date needs to be recalculated (e.g., after a renewal or if the date has already passed).
	 * If you need to retrieve the currently scheduled date, use get_date() or get_time() instead.
	 *
	 * @see WC_Subscription::calculate_next_payment_date() for more details about how the next payment date is calculated.
	 *
	 * @param string $date_type 'trial_end', 'next_payment', 'end_of_prepaid_term' or 'end'.
	 *
	 * @return string|int The calculated date in MySQL format (`YYYY-MM-DD HH:MM:SS`), or `0` if undefined.
	 */
	public function calculate_date( $date_type ) {

		switch ( $date_type ) {
			case 'next_payment':
				$date = $this->calculate_next_payment_date();
				break;
			case 'trial_end':
				if ( $this->get_payment_count() >= 2 ) {
					$date = 0;
				} else {
					// By default, trial end is the same as the next payment date
					$date = $this->calculate_next_payment_date();
				}
				break;
			case 'end_of_prepaid_term':

				$next_payment_time = $this->get_time( 'next_payment' );
				$end_time          = $this->get_time( 'end' );

				// If there was a future payment, the customer has paid up until that payment date
				if ( $this->get_time( 'next_payment' ) >= current_time( 'timestamp', true ) ) {
					$date = $this->get_date( 'next_payment' );
				// If there is no future payment and no expiration date set, the customer has no prepaid term (this shouldn't be possible as only active subscriptions can be set to pending cancellation and an active subscription always has either an end date or next payment)
				} elseif ( 0 == $next_payment_time || $end_time <= current_time( 'timestamp', true ) ) {
					$date = current_time( 'mysql', true );
				} else {
					$date = $this->get_date( 'end' );
				}
				break;
			default:
				$date = 0;
				break;
		}

		/**
		 * Filter the calculated date for a subscription.
		 *
		 * The filter hook is dynamic. 'woocommerce_subscription_calculated_{date_type}_date' where {date_type} is the date type passed to the function.
		 * For example:
		 *  - 'woocommerce_subscription_calculated_next_payment_date'
		 *  - 'woocommerce_subscription_calculated_trial_end_date'
		 *  - 'woocommerce_subscription_calculated_end_of_prepaid_term_date'
		 *
		 * @param string|int      $date         The calculated date in MySQL format (`YYYY-MM-DD HH:MM:SS`), or `0` if undefined.
		 * @param WC_Subscription $subscription The subscription object.
		 */
		return apply_filters( 'woocommerce_subscription_calculated_' . $date_type . '_date', $date, $this );
	}

	/**
	 * Calculates the next payment date for a subscription.
	 *
	 * This function calculates the next valid renewal date. This could be the currently scheduled next payment date if it's still valid or
	 * it could be a newly calculated date based on specific conditions. It is primarily used when the next payment date needs to be
	 * recalculated (e.g., after a renewal or if the next payment date has already passed).
	 *
	 * How it calculates the next payment date:
	 * - If the subscription has a trial period, and the trial is still active, the next
	 *   payment returned is the scheduled trial end date.
	 * - Otherwise, the function selects a base date and adds {interval} {period} to it. The base date is chosen in this order:
	 *   1. Current next payment date – Used if the subscription has a trial period and there's no first renewal payment yet or it is synced
	 *      to a fixed billing day.
	 *   2. Last payment date – This is the most common case. The last order payment date is used to ensure the customer is given a full
	 *      billing term after they successfully paid the last order. This is important in cases where the last order payment failed and
	 *      was paid sometime later.
	 *        - This can be bypassed using the 'wcs_calculate_next_payment_from_last_payment' filter.
	 *        - @see https://github.com/woocommerce/woocommerce-subscriptions-preserve-billing-schedule
	 *   3. Next payment date – Used when the filter above is used and the subscription has a valid next payment date. This preserves the
	 *      subscriptions current billing date. eg if the subscription's payment date occurs on the 10th of every month, it will continue
	 *      even if the last payment was received late.
	 *   4. Subscription start date – Used as a last resort if no valid payment dates exist.
	 *
	 * Important notes:
	 * - If the resulting calculated next payment date is less than 2 hours in the future, it will add an additional billing period
	 *   until it finds a date a least 2 hours in the future. This was originally necessary to combat daylight savings issues. ie if
	 *   we added 1 billing period to the previous date but there has been a subsequent daylight savings change, the next payment date
	 *   could be on the same day as the previous payment.
	 * - If the subscription has an end date, and the calculated next payment occurs after it, the function returns 0. ie there are no
	 *   more payments to be made.
	 * - Although an inactive subscription does not have a public facing next payment date, this function will still calculate the date
	 *   so it can be used when determining what the next date would be if the subscription were to be reactivated.
	 *
	 * Filters:
	 * - wcs_calculate_next_payment_from_last_payment (bool) – Controls whether the function
	 *   should use the last payment date as the base for calculation. Default is true.
	 *
	 * @return int|string Zero if the subscription has no next payment date, or a MySQL formatted date (YYYY-MM-DD HH:MM:SS) if there is a next payment date.
	 */
	protected function calculate_next_payment_date() {
		$next_payment_date = 0;

		// If the subscription is not active, there is no next payment date
		$start_time        = $this->get_time( 'start' );
		$next_payment_time = $this->get_time( 'next_payment' );
		$trial_end_time    = $this->get_time( 'trial_end' );
		$last_payment_time = max( $this->get_time( 'last_order_date_created' ), $this->get_time( 'last_order_date_paid' ) );
		$end_time          = $this->get_time( 'end' );

		// If the subscription has a free trial period, and we're still in the free trial period, the next payment is due at the end of the free trial
		if ( $trial_end_time > current_time( 'timestamp', true ) ) {

			$next_payment_timestamp = $trial_end_time;

		} else {

			// The next payment date is {interval} billing periods from the start date, trial end date or last payment date
			if ( 0 !== $next_payment_time && $next_payment_time < gmdate( 'U' ) && ( ( 0 !== $trial_end_time && 1 >= $this->get_payment_count() ) || WC_Subscriptions_Synchroniser::subscription_contains_synced_product( $this ) ) ) {
				$from_timestamp = $next_payment_time;
			} elseif ( $last_payment_time >= $start_time && apply_filters( 'wcs_calculate_next_payment_from_last_payment', true, $this ) ) {
				$from_timestamp = $last_payment_time;
			} elseif ( $next_payment_time > $start_time ) { // Use the currently scheduled next payment to preserve synchronisation
				$from_timestamp = $next_payment_time;
			} else {
				$from_timestamp = $start_time;
			}

			$next_payment_timestamp = wcs_add_time( $this->get_billing_interval(), $this->get_billing_period(), $from_timestamp, 'offset_site_time' );

			// Make sure the next payment is more than 2 hours in the future, this ensures changes to the site's timezone because of daylight savings will never cause a 2nd renewal payment to be processed on the same day
			$i = 1;
			while ( $next_payment_timestamp < ( current_time( 'timestamp', true ) + 2 * HOUR_IN_SECONDS ) && $i < 3000 ) {
				$next_payment_timestamp = wcs_add_time( $this->get_billing_interval(), $this->get_billing_period(), $next_payment_timestamp, 'offset_site_time' );
				$i += 1;
			}
		}

		// If the subscription has an end date and the next billing period comes after that, return 0
		if ( 0 != $end_time && ( $next_payment_timestamp + 23 * HOUR_IN_SECONDS ) > $end_time ) {
			$next_payment_timestamp = 0;
		}

		if ( $next_payment_timestamp > 0 ) {
			$next_payment_date = gmdate( 'Y-m-d H:i:s', $next_payment_timestamp );
		}

		return $next_payment_date;
	}

	/**
	 * Complete a partial save, saving subscription date changes to the database.
	 *
	 * Sometimes it's necessary to only save changes to date properties, for example, when you
	 * don't want status transitions to be triggered by a full object @see $this->save().
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.6
	 */
	public function save_dates() {
		if ( $this->data_store && $this->get_id() ) {
			$saved_dates = $this->data_store->save_dates( $this );

			// Apply the saved date changes
			$this->data    = array_replace_recursive( $this->data, $saved_dates );
			$this->changes = array_diff_key( $this->changes, $saved_dates );
		}
	}

	/** Formatted Totals Methods *******************************************************/

	/**
	 * Gets line subtotal - formatted for display.
	 *
	 * @param array  $item
	 * @param string $tax_display
	 * @return string
	 */
	public function get_formatted_line_subtotal( $item, $tax_display = '' ) {

		if ( ! $tax_display ) {
			$tax_display = get_option( 'woocommerce_tax_display_cart' );
		}

		if ( ! isset( $item['line_subtotal'] ) || ! isset( $item['line_subtotal_tax'] ) ) {
			return '';
		}

		if ( $this->is_one_payment() ) {

			$subtotal = parent::get_formatted_line_subtotal( $item, $tax_display );

		} else {

			if ( 'excl' == $tax_display ) {
				$line_subtotal = $this->get_line_subtotal( $item );
			} else {
				$line_subtotal = $this->get_line_subtotal( $item, true );
			}
			$subtotal = wcs_price_string( $this->get_price_string_details( $line_subtotal ) );
			$subtotal = apply_filters( 'woocommerce_order_formatted_line_subtotal', $subtotal, $item, $this );
		}

		return $subtotal;
	}

	/**
	 * Gets order total - formatted for display.
	 *
	 * @param string $tax_display only used for method signature match
	 * @param bool $display_refunded only used for method signature match
	 * @return string
	 */
	public function get_formatted_order_total( $tax_display = '', $display_refunded = true ) {
		if ( $this->get_total() > 0 && '' !== $this->get_billing_period() && ! $this->is_one_payment() ) {
			$formatted_order_total = wcs_price_string( $this->get_price_string_details( $this->get_total() ) );
		} else {
			$formatted_order_total = parent::get_formatted_order_total();
		}
		return apply_filters( 'woocommerce_get_formatted_subscription_total', $formatted_order_total, $this );
	}

	/**
	 * Gets subtotal - subtotal is shown before discounts, but with localised taxes.
	 *
	 * @param bool $compound (default: false)
	 * @param string $tax_display (default: the tax_display_cart value)
	 * @return string
	 */
	public function get_subtotal_to_display( $compound = false, $tax_display = '' ) {

		if ( ! $tax_display ) {
			$tax_display = get_option( 'woocommerce_tax_display_cart' );
		}

		$subtotal = 0;

		if ( ! $compound ) {
			foreach ( $this->get_items() as $item ) {

				if ( ! isset( $item['line_subtotal'] ) || ! isset( $item['line_subtotal_tax'] ) ) {
					return '';
				}

				$subtotal += $item['line_subtotal'];

				if ( 'incl' == $tax_display ) {
					$subtotal += $item['line_subtotal_tax'];
				}
			}

			$subtotal = wc_price( $subtotal, array( 'currency' => $this->get_currency() ) );

			if ( 'excl' == $tax_display && $this->get_prices_include_tax() ) {
				$subtotal .= ' <small>' . WC()->countries->ex_tax_or_vat() . '</small>';
			}
		} else {

			if ( 'incl' == $tax_display ) {
				return '';
			}

			foreach ( $this->get_items() as $item ) {

				$subtotal += $item['line_subtotal'];

			}

			// Add Shipping Costs
			$subtotal += $this->get_total_shipping();

			// Remove non-compound taxes
			foreach ( $this->get_taxes() as $tax ) {

				if ( ! empty( $tax['compound'] ) ) {
					continue;
				}

				$subtotal = $subtotal + $tax['tax_amount'] + $tax['shipping_tax_amount'];

			}

			// Remove discounts
			$subtotal = $subtotal - $this->get_total_discount();

			$subtotal = wc_price( $subtotal, array( 'currency' => $this->get_currency() ) );
		}

		return apply_filters( 'woocommerce_order_subtotal_to_display', $subtotal, $compound, $this );
	}

	/**
	 * Get the details of the subscription for use with @see wcs_price_string()
	 *
	 * This is protected because it should not be used directly by outside methods. If you need
	 * to display the price of a subscription, use the @see $this->get_formatted_order_total(),
	 * @see $this->get_subtotal_to_display() or @see $this->get_formatted_line_subtotal() method.
	 * If you want to customise which aspects of a price string are displayed for all subscriptions,
	 * use the filter 'woocommerce_subscription_price_string_details'.
	 *
	 * @return array
	 */
	protected function get_price_string_details( $amount = 0, $display_ex_tax_label = false ) {

		$subscription_details = array(
			'currency'                    => $this->get_currency(),
			'recurring_amount'            => $amount,
			'subscription_period'         => $this->get_billing_period(),
			'subscription_interval'       => $this->get_billing_interval(),
			'display_excluding_tax_label' => $display_ex_tax_label,
		);

		return apply_filters( 'woocommerce_subscription_price_string_details', $subscription_details, $this );
	}

	/**
	 * Cancel the order and restore the cart (before payment)
	 *
	 * @param string $note (default: '') Optional note to add
	 */
	public function cancel_order( $note = '' ) {

		// If the customer hasn't been through the pending cancellation period yet set the subscription to be pending cancellation unless there is a pending renewal order.
		if ( apply_filters( 'woocommerce_subscription_use_pending_cancel', true ) && $this->calculate_date( 'end_of_prepaid_term' ) > current_time( 'mysql', true ) && ( $this->has_status( 'active' ) || $this->has_status( 'on-hold' ) && ! $this->needs_payment() ) ) {

			$this->update_status( 'pending-cancel', $note );

		// If the subscription has already ended or can't be cancelled for some other reason, just record the note.
		} elseif ( ! $this->can_be_updated_to( 'cancelled' ) ) {

			$this->add_order_note( $note );

		// Cancel for real if we're already pending cancellation
		} else {

			$this->update_status( 'cancelled', $note );

		}
	}

	/**
	 * Allow subscription amounts/items to bed edited if the gateway supports it.
	 *
	 * @access public
	 * @return bool
	 */
	public function is_editable() {

		if ( ! isset( $this->editable ) ) {

			if ( $this->has_status( array( 'pending', 'draft', 'auto-draft' ) ) ) {
				$this->editable = true;
			} elseif ( $this->is_manual() || $this->payment_method_supports( 'subscription_amount_changes' ) ) {
				$this->editable = true;
			} else {
				$this->editable = false;
			}
		}

		return apply_filters( 'wc_order_is_editable', $this->editable, $this );
	}

	/**
	 * Process payment on the subscription, which mainly means processing it for the last order on the subscription.
	 *
	 * @param $transaction_id string Optional transaction id to store in post meta
	 */
	public function payment_complete( $transaction_id = '' ) {

		if ( WC_Subscriptions_Change_Payment_Gateway::$is_request_to_change_payment ) {
			return;
		}

		// Clear the cached renewal payment counts, kept here for backward compat even though it's also reset in $this->process_payment_complete()
		if ( isset( $this->cached_payment_count['completed'] ) ) {
			$this->cached_payment_count = null;
		}

		// Make sure the last order's status is updated
		$last_order = $this->get_last_order( 'all', 'any' );

		if ( false !== $last_order && $last_order->needs_payment() ) {
			$last_order->payment_complete( $transaction_id );
		}

		$this->payment_complete_for_order( $last_order );
	}

	/**
	 * When payment is completed for a related order, reset any renewal related counters and reactive the subscription.
	 *
	 * @param WC_Order $order
	 */
	public function payment_complete_for_order( $last_order ) {

		// Clear the cached renewal payment counts
		if ( isset( $this->cached_payment_count['completed'] ) ) {
			$this->cached_payment_count = null;
		}

		// Reset suspension count
		$this->set_suspension_count( 0 );

		// Make sure subscriber has default role
		wcs_update_users_role( $this->get_user_id(), 'default_subscriber_role' );

		// Add order note depending on initial payment
		$this->add_order_note( __( 'Payment status marked complete.', 'woocommerce-subscriptions' ) );

		// $this->update_status() only calls save if the status has changed.
		if ( 'active' !== $this->get_status( 'edit' ) ) {
			$this->update_status( 'active' );
		} else {
			$this->save();
		}

		do_action( 'woocommerce_subscription_payment_complete', $this );

		if ( false !== $last_order && wcs_order_contains_renewal( $last_order ) ) {
			$last_order->delete_meta_data( self::RENEWAL_FAILED_META_KEY );
			$last_order->save();
			do_action( 'woocommerce_subscription_renewal_payment_complete', $this, $last_order );
		}
	}

	/**
	 * When a payment fails, either for the original purchase or a renewal payment, this function processes it.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function payment_failed( $new_status = 'on-hold' ) {

		// Make sure the last order's status is set to failed
		$last_order = $this->get_last_order( 'all', 'any' );

		if ( false !== $last_order ) {
			$last_order->update_meta_data( self::RENEWAL_FAILED_META_KEY, wc_bool_to_string( true ) );

			if ( false === $last_order->has_status( 'failed' ) ) {
				remove_filter( 'woocommerce_order_status_changed', 'WC_Subscriptions_Renewal_Order::maybe_record_subscription_payment' );
				$last_order->update_status( 'failed' );
				add_filter( 'woocommerce_order_status_changed', 'WC_Subscriptions_Renewal_Order::maybe_record_subscription_payment', 10, 3 );
			} else {
				// If we didn't update the status, save the order to make sure our self::RENEWAL_FAILED_META_KEY meta data is saved.
				$last_order->save();
			}
		}

		// Log payment failure on order
		$this->add_order_note( __( 'Payment failed.', 'woocommerce-subscriptions' ) );

		// Allow a short circuit for plugins & payment gateways to force max failed payments exceeded
		// This also forces the new status to be 'cancelled' if the filter is applied or the subscription is pending-cancel
		$max_failed_payments = apply_filters( 'woocommerce_subscription_max_failed_payments_exceeded', false, $this );
		$status_note         = $max_failed_payments ? __( 'Subscription Cancelled: maximum number of failed payments reached.', 'woocommerce-subscriptions' ) : '';

		if ( $max_failed_payments || $this->has_status( 'pending-cancel' ) ) {
			$new_status = 'cancelled';
		}

		if ( $this->can_be_updated_to( $new_status ) ) {
			$this->update_status( $new_status, $status_note );
		}

		do_action( 'woocommerce_subscription_payment_failed', $this, $new_status );

		if ( false !== $last_order && wcs_order_contains_renewal( $last_order ) ) {
			do_action( 'woocommerce_subscription_renewal_payment_failed', $this, $last_order );
		}
	}

	/*** Refund related functions are required for the Edit Order/Subscription screen, but they aren't used on a subscription ************/

	/**
	 * Get order refunds
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2
	 * @return array
	 */
	public function get_refunds() {
		return array();
	}

	/**
	 * Get amount already refunded
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2
	 * @return int|float
	 */
	public function get_total_refunded() {
		return 0;
	}

	/**
	 * Get the refunded amount for a line item
	 *
	 * @param  int $item_id ID of the item we're checking
	 * @param  string $item_type type of the item we're checking, if not a line_item
	 * @return integer
	 */
	public function get_qty_refunded_for_item( $item_id, $item_type = 'line_item' ) {
		return 0;
	}

	/**
	 * Get the refunded amount for a line item
	 *
	 * @param  int $item_id ID of the item we're checking
	 * @param  string $item_type type of the item we're checking, if not a line_item
	 * @return integer
	 */
	public function get_total_refunded_for_item( $item_id, $item_type = 'line_item' ) {
		return 0;
	}

	/**
	 * Get the refunded amount for a line item
	 *
	 * @param  int $item_id ID of the item we're checking
	 * @param  int $tax_id ID of the tax we're checking
	 * @param  string $item_type type of the item we're checking, if not a line_item
	 * @return integer
	 */
	public function get_tax_refunded_for_item( $item_id, $tax_id, $item_type = 'line_item' ) {
		return 0;
	}

	/**
	 * Get parent order object.
	 *
	 * @return mixed WC_Order|bool
	 */
	public function get_parent() {
		$parent_id = $this->get_parent_id();
		$order     = false;

		if ( $parent_id > 0 ) {
			$order = wc_get_order( $parent_id );
		}

		return $order;
	}

	/**
	 * Extracting the query from get_related_orders and get_last_order so it can be moved in a cached
	 * value.
	 *
	 * @deprecated 1.0.0 - Migrated from WooCommerce Subscriptions v2.3.0, Moved to WCS_Subscription_Data_Store_CPT::get_related_order_ids() to separate cache logic from subscription instances and to avoid confusion from the misnomer on this method's name - it gets renewal orders, not related orders - and its ambiguity - it runs a query and returns order IDs, it does not return a SQL query string or order objects.
	 * @return array
	 */
	public function get_related_orders_query( $subscription_id ) {
		wcs_deprecated_function( __METHOD__, '2.3.0', 'WCS_Subscription_Data_Store_CPT::get_related_order_ids( wcs_get_subscription( $subscription_id ) ) via WCS_Subscription_Data_Store::instance()' );
		return WCS_Related_Order_Store::instance()->get_related_order_ids( wcs_get_subscription( $subscription_id ), 'renewal' );
	}

	/**
	 * Get the related orders for a subscription, including renewal orders and the initial order (if any)
	 *
	 * @param string $return_fields The columns to return, either 'all' or 'ids'
	 * @param array|string $order_types Can include 'any', 'parent', 'renewal', 'resubscribe' and/or 'switch'. Custom types possible via the 'woocommerce_subscription_related_orders' filter. Defaults to array( 'parent', 'renewal', 'switch' ).
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 * @return array
	 */
	public function get_related_orders( $return_fields = 'ids', $order_types = array( 'parent', 'renewal', 'switch' ) ) {
		$return_fields  = ( 'ids' === $return_fields ) ? $return_fields : 'all';
		$related_orders = [];

		if ( 'all' === $order_types ) {
			wcs_deprecated_argument( __METHOD__, '2.3.0', sprintf( __( 'The "all" value for $order_type parameter is deprecated. It was a misnomer, as it did not return resubscribe orders. It was also inconsistent with order type values accepted by wcs_get_subscription_orders(). Use array( "parent", "renewal", "switch" ) to maintain previous behaviour, or "any" to receive all order types, including switch and resubscribe.', 'woocommerce-subscriptions' ), __CLASS__ ) );
			$order_types = array( 'parent', 'renewal', 'switch' );
		} elseif ( ! is_array( $order_types ) ) {
			// Accept either an array or string (to make it more convenient for singular types, like 'parent' or 'any').
			$order_types = array( $order_types );
		}

		foreach ( $this->get_related_order_ids( $order_types, 'grouped' ) as $order_type => $order_ids ) {
			$related_orders_for_order_type = [];

			foreach ( $order_ids as $order_id ) {
				if ( 'ids' === $return_fields ) {
					$related_orders_for_order_type[ $order_id ] = $order_id;
					continue;
				}

				// Handle the "all" return type by fetching the order object.
				$order = wc_get_order( $order_id );

				if ( $order ) {
					$related_orders_for_order_type[ $order_id ] = $order;
				}
			}

			$related_orders += apply_filters( 'woocommerce_subscription_related_orders', $related_orders_for_order_type, $this, $return_fields, $order_type );
		}

		arsort( $related_orders );

		return $related_orders;
	}

	/**
	 * Get the related order IDs for a subscription based on an order type.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.3.0
	 * @since 7.2.1 - The $order_type parameter can now be an array of order types and the $return_type parameter was added.
	 *
	 * @param string|array $order_type  Can include 'any', 'parent', 'renewal', 'resubscribe' and/or 'switch'. Defaults to 'any'.
	 * @param string       $return_type The format to return the related order IDs in. Can be 'flat' or 'grouped'. Defaults to 'flat'.
	 *
	 * @return array List of related order IDs.
	 */
	protected function get_related_order_ids( $order_type = 'any', $return_type = 'flat' ) {
		$order_types       = is_array( $order_type ) ? $order_type : [ $order_type ];
		$related_order_ids = [];

		// For backwards compatibility, replace 'any' with the actual order types.
		if ( in_array( 'any', $order_types, true ) ) {
			$order_types = array_diff( $order_types, [ 'any' ] ); // Remove 'any'.
			$order_types = array_unique( array_merge( $order_types, [ 'parent', 'renewal', 'resubscribe', 'switch' ] ) ); // Add the 'any' order types.
		}

		// Get the parent order ID first.
		if ( in_array( 'parent', $order_types, true ) ) {
			// Remove the parent order type from the list of order types.
			$order_types = array_diff( $order_types, [ 'parent' ] );
			$parent_id   = $this->get_parent_id();

			// Because the call requested the parent order, if there is no parent ID, we need to return an empty array.
			$related_order_ids['parent'] = $parent_id ? [ $parent_id ] : [];
		}

		if ( ! empty( $order_types ) ) {
			// Get the related order IDs based on the remaining order types.
			$related_order_ids += WCS_Related_Order_Store::instance()->get_related_order_ids_by_types( $this, $order_types );
		}

		if ( 'flat' === $return_type && ! empty( $related_order_ids ) ) {
			// Flatten the grouped order IDs into a single array.
			$related_order_ids = array_merge( ...array_values( $related_order_ids ) );
		}

		return $related_order_ids;
	}

	/**
	 * Gets the most recent order that relates to a subscription, including renewal orders and the initial order (if any).
	 *
	 * @param string $return_fields The columns to return, either 'all' or 'ids'
	 * @param array $order_types Can include any combination of 'parent', 'renewal', 'switch' or 'any' which will return the latest renewal order of any type. Defaults to 'parent' and 'renewal'.
	 * @param array $exclude_statuses An array of statuses to exclude from the search. Defaults to an empty array.
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function get_last_order( $return_fields = 'ids', $order_types = array( 'parent', 'renewal' ), $exclude_statuses = [] ) {

		$return_fields  = ( 'ids' == $return_fields ) ? $return_fields : 'all';
		$order_types    = ( 'any' == $order_types ) ? array( 'parent', 'renewal', 'switch' ) : (array) $order_types;
		$related_orders = array();

		foreach ( $order_types as $order_type ) {
			switch ( $order_type ) {
				case 'parent':
					if ( false != $this->get_parent_id() ) {
						$related_orders[] = $this->get_parent_id();
					}
					break;
				default:
					$related_orders = array_merge( $related_orders, $this->get_related_order_ids( $order_type ) );
					break;
			}
		}

		if ( ! empty( $exclude_statuses ) ) {
			$related_orders = array_filter(
				$related_orders,
				function( $order_id ) use ( $exclude_statuses ) {
					$order = wc_get_order( $order_id );
					return $order && ! $order->has_status( $exclude_statuses );
				}
			);
		}

		if ( empty( $related_orders ) ) {
			$last_order = false;
		} else {
			$last_order = max( $related_orders );

			if ( 'all' == $return_fields ) {
				if ( false != $this->get_parent_id() && $last_order == $this->get_parent_id() ) {
					$last_order = $this->get_parent();
				} else {
					$last_order = wc_get_order( $last_order );
				}
			}
		}

		return apply_filters( 'woocommerce_subscription_last_order', $last_order, $this );
	}

	/**
	 * Determine how the payment method should be displayed for a subscription.
	 *
	 * @param string $context The context the payment method is being displayed in. Can be 'admin' or 'customer'. Default 'admin'.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function get_payment_method_to_display( $context = 'admin' ) {

		if ( $this->is_manual() ) {

			$payment_method_to_display = __( 'Manual Renewal', 'woocommerce-subscriptions' );

		// Use the current title of the payment gateway when available
		} elseif ( false !== ( $payment_gateway = wc_get_payment_gateway_by_order( $this ) ) ) {

			$payment_method_to_display = $payment_gateway->get_title();

		// Fallback to the title of the payment method when the subscription was created
		} else {

			$payment_method_to_display = $this->get_payment_method_title();

		}

		$payment_method_to_display = apply_filters( 'woocommerce_subscription_payment_method_to_display', $payment_method_to_display, $this, $context );

		if ( 'customer' === $context ) {
			// translators: %s: payment method.
			$payment_method_to_display = sprintf( __( 'Via %s', 'woocommerce-subscriptions' ), $payment_method_to_display );

			// Only filter the result for non-manual subscriptions.
			if ( ! $this->is_manual() ) {
				$payment_method_to_display = apply_filters( 'woocommerce_my_subscriptions_payment_method', $payment_method_to_display, $this );
			}
		}

		return $payment_method_to_display;
	}

	/**
	 * Save new payment method for a subscription
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0.0
	 *
	 * @throws InvalidArgumentException An exception is thrown via @see WC_Subscription::set_payment_method_meta() if the payment meta passed is invalid.
	 * @param WC_Payment_Gateway|string $payment_method
	 * @param array $payment_meta Associated array of the form: $database_table => array( value, )
	 */
	public function set_payment_method( $payment_method = '', $payment_meta = array() ) {

		if ( empty( $payment_method ) ) {

			$this->set_requires_manual_renewal( true );
			$this->set_prop( 'payment_method', '' );
			$this->set_prop( 'payment_method_title', '' );

		} else {

			// Set the payment gateway ID depending on whether we have a WC_Payment_Gateway or string key
			$payment_method_id = is_a( $payment_method, 'WC_Payment_Gateway' ) ? $payment_method->id : $payment_method;

			if ( ! empty( $payment_meta ) ) {
				$this->set_payment_method_meta( $payment_method_id, $payment_meta );
			}

			if ( $this->get_payment_method() !== $payment_method_id ) {

				// We shouldn't set the requires manual renewal prop or try to get the payment gateway while the object is being read. That prop should be set by reading it from the DB not based on settings or the payment gateway
				if ( $this->object_read ) {

					// Set the payment gateway ID depending on whether we have a string or WC_Payment_Gateway or string key
					if ( is_a( $payment_method, 'WC_Payment_Gateway' ) ) {
						$payment_gateway  = $payment_method;
					} else {
						$payment_gateways = WC()->payment_gateways->payment_gateways();
						$payment_gateway  = isset( $payment_gateways[ $payment_method_id ] ) ? $payment_gateways[ $payment_method_id ] : null;
					}

					if ( wcs_is_manual_renewal_required() ) {
						$this->set_requires_manual_renewal( true );
					} elseif ( is_null( $payment_gateway ) || false == $payment_gateway->supports( 'subscriptions' ) ) {
						$this->set_requires_manual_renewal( true );
					} else {
						$this->set_requires_manual_renewal( false );
					}

					$this->set_prop( 'payment_method_title', is_null( $payment_gateway ) ? '' : $payment_gateway->get_title() );
				}

				$this->set_prop( 'payment_method', $payment_method_id );
			}
		}
	}

	/**
	 * Save payment method meta data for the Subscription
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0.0
	 *
	 * @throws InvalidArgumentException An exception if the payment meta variable isn't an array.
	 *
	 * @param string $payment_method_id The payment method's ID.
	 * @param array  $payment_meta      Associated array of the form: $database_table => array( value, )
	 */
	protected function set_payment_method_meta( $payment_method_id, $payment_meta ) {

		if ( ! is_array( $payment_meta ) ) {
			throw new InvalidArgumentException( __( 'Payment method meta must be an array.', 'woocommerce-subscriptions' ) );
		}

		// Allow payment gateway extensions to validate the data and throw exceptions if necessary
		do_action( 'woocommerce_subscription_validate_payment_meta', $payment_method_id, $payment_meta, $this );
		do_action( 'woocommerce_subscription_validate_payment_meta_' . $payment_method_id, $payment_meta, $this );

		wcs_set_payment_meta( $this, $payment_meta );
	}

	/**
	 * Now uses the URL /my-account/view-subscription/{post-id} when viewing a subscription from the My Account Page.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function get_view_order_url() {
		$view_subscription_url = wc_get_endpoint_url( 'view-subscription', $this->get_id(), wc_get_page_permalink( 'myaccount' ) );

		return apply_filters( 'wcs_get_view_subscription_url', $view_subscription_url, $this->get_id() );
	}

	/**
	 * Checks if product download is permitted
	 *
	 * @return bool
	 */
	public function is_download_permitted() {
		$sending_email = did_action( 'woocommerce_email_header' ) > did_action( 'woocommerce_email_footer' );
		$is_download_permitted = $this->has_status( 'active' ) || $this->has_status( 'pending-cancel' );

		// WC Emails are sent before the subscription status is updated to active etc. so we need a way to ensure download links are added to the emails before being sent
		if ( $sending_email && ! $is_download_permitted ) {
			$is_download_permitted = true;
		}

		return apply_filters( 'woocommerce_order_is_download_permitted', $is_download_permitted, $this );
	}

	/**
	 * Check if the subscription has a line item for a specific product, by ID.
	 *
	 * @param int A product or variation ID to check for.
	 * @return bool
	 */
	public function has_product( $product_id ) {

		$has_product = false;

		foreach ( $this->get_items() as $line_item ) {
			if ( $line_item['product_id'] == $product_id || $line_item['variation_id'] == $product_id ) {
				$has_product = true;
				break;
			}
		}

		return $has_product;
	}

	/**
	 * Check if the subscription has a payment gateway.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.5.0
	 * @return bool
	 */
	public function has_payment_gateway() {
		return (bool) wc_get_payment_gateway_by_order( $this );
	}

	/**
	 * The total sign-up fee for the subscription if any.
	 *
	 * @return int
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function get_sign_up_fee() {

		$sign_up_fee = 0;

		foreach ( $this->get_items() as $line_item ) {
			try {
				$sign_up_fee += $this->get_items_sign_up_fee( $line_item );
			} catch ( Exception $e ) {
				$sign_up_fee += 0;
			}
		}

		return apply_filters( 'woocommerce_subscription_sign_up_fee', $sign_up_fee, $this );
	}

	/**
	 * Check if a given line item on the subscription had a sign-up fee, and if so, return the value of the sign-up fee.
	 *
	 * The single quantity sign-up fee will be returned instead of the total sign-up fee paid. For example, if 3 x a product
	 * with a 10 BTC sign-up fee was purchased, a total 30 BTC was paid as the sign-up fee but this function will return 10 BTC.
	 *
	 * @param array|int Either an order item (in the array format returned by self::get_items()) or the ID of an order item.
	 * @param  string $tax_inclusive_or_exclusive Whether or not to adjust sign up fee if prices inc tax - ensures that the sign up fee paid amount includes the paid tax if inc
	 * @return bool
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function get_items_sign_up_fee( $line_item, $tax_inclusive_or_exclusive = 'exclusive_of_tax' ) {

		if ( ! is_object( $line_item ) ) {
			$line_item = wcs_get_order_item( $line_item, $this );
		}

		$parent_order = $this->get_parent();

		// If there was no original order, nothing was paid up-front which means no sign-up fee
		if ( false == $parent_order ) {

			$sign_up_fee = 0;

		} else {

			$original_order_item = '';

			// Find the matching item on the order
			foreach ( $parent_order->get_items() as $order_item ) {
				if ( wcs_get_canonical_product_id( $line_item ) == wcs_get_canonical_product_id( $order_item ) ) {
					$original_order_item = $order_item;
					break;
				}
			}

			// No matching order item, so this item wasn't purchased in the original order
			if ( empty( $original_order_item ) ) {

				$sign_up_fee = 0;

			} elseif ( 'true' === $line_item->get_meta( '_has_trial' ) ) {
				// Sign up is amount paid for this item on original order, we can safely use 3.0 getters here because we know from the above condition 3.0 is active
				$sign_up_fee = ( (float) $original_order_item->get_total( 'edit' ) ) / $original_order_item->get_quantity( 'edit' );
			} elseif ( $original_order_item->meta_exists( '_synced_sign_up_fee' ) ) {
				$sign_up_fee = ( (float) $original_order_item->get_meta( '_synced_sign_up_fee' ) ) / $original_order_item->get_quantity( 'edit' );

				// The synced sign up fee meta contains the raw product sign up fee, if the subscription totals are inclusive of tax, we need to adjust the synced sign up fee to match tax inclusivity.
				if ( $this->get_prices_include_tax() ) {
					$line_item_total    = (float) $original_order_item->get_total( 'edit' ) + $original_order_item->get_total_tax( 'edit' );
					$signup_fee_portion = $sign_up_fee / $line_item_total;
					$sign_up_fee        = (float) $original_order_item->get_total( 'edit' ) * $signup_fee_portion;
				}
			} else {
				// Sign-up fee is any amount on top of recurring amount
				$order_line_total        = ( (float) $original_order_item->get_total( 'edit' ) ) / $original_order_item->get_quantity( 'edit' );
				$subscription_line_total = ( (float) $line_item->get_total( 'edit' ) ) / $line_item->get_quantity( 'edit' );

				$sign_up_fee = max( $order_line_total - $subscription_line_total, 0 );
			}

			// If prices don't inc tax, ensure that the sign up fee amount includes the tax.
			if ( 'inclusive_of_tax' === $tax_inclusive_or_exclusive && ! empty( $original_order_item ) && ! empty( $sign_up_fee ) ) {
				$sign_up_fee_proportion = $sign_up_fee / ( $original_order_item->get_total( 'edit' ) / $original_order_item->get_quantity( 'edit' ) );
				$sign_up_fee_tax        = $original_order_item->get_total_tax( 'edit' ) * $sign_up_fee_proportion;

				$sign_up_fee += $sign_up_fee_tax;
				$sign_up_fee  = wc_format_decimal( $sign_up_fee, wc_get_price_decimals() );
			}
		}

		return apply_filters( 'woocommerce_subscription_items_sign_up_fee', $sign_up_fee, $line_item, $this, $tax_inclusive_or_exclusive );
	}

	/**
	 *  Determine if the subscription is for one payment only.
	 *
	 * @return bool whether the subscription is for only one payment
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0.17
	 */
	public function is_one_payment() {

		$is_one_payment = false;

		if ( 0 != ( $end_time = $this->get_time( 'end' ) ) ) {

			$from_timestamp = $this->get_time( 'start' );

			if ( 0 != $this->get_time( 'trial_end' ) || WC_Subscriptions_Synchroniser::subscription_contains_synced_product( $this ) ) {

				$subscription_order_count = count( $this->get_related_orders() );

				// when we have a sync'd subscription before its 1st payment, we need to base the calculations for the next payment on the first/next payment timestamp.
				if ( $subscription_order_count < 2 && 0 != ( $next_payment_timestamp = $this->get_time( 'next_payment' ) ) ) {
					$from_timestamp = $next_payment_timestamp;

				// when we have a sync'd subscription after its 1st payment, we need to base the calculations for the next payment on the last payment timestamp.
				} else if ( ! ( $subscription_order_count > 2 ) && 0 != ( $last_payment_timestamp = $this->get_time( 'last_order_date_created' ) ) ) {
					$from_timestamp = $last_payment_timestamp;
				}
			}

			$next_payment_timestamp = wcs_add_time( $this->get_billing_interval(), $this->get_billing_period(), $from_timestamp );

			if ( ( $next_payment_timestamp + DAY_IN_SECONDS - 1 ) > $end_time ) {
				$is_one_payment = true;
			}
		}

		return apply_filters( 'woocommerce_subscription_is_one_payment', $is_one_payment, $this );
	}

	/**
	 * Get the downloadable files for an item in this subscription if the subscription is active
	 *
	 * @param  array $item
	 * @return array
	 */
	public function get_item_downloads( $item ) {

		if ( ! wcs_is_woocommerce_pre( '3.0' ) ) {
			wcs_deprecated_function( __METHOD__, '2.2.0', 'WC_Order_Item_Product::get_item_downloads(), because WooCommerce 3.0+ now uses that' );
		}

		$files = array();

		// WC Emails are sent before the subscription status is updated to active etc. so we need a way to ensure download links are added to the emails before being sent
		$sending_email = did_action( 'woocommerce_email_before_order_table' ) > did_action( 'woocommerce_email_after_order_table' );

		if ( $this->has_status( apply_filters( 'woocommerce_subscription_item_download_statuses', array( 'active', 'pending-cancel' ) ) ) || $sending_email ) {
			$files = parent::get_item_downloads( $item );
		}

		return apply_filters( 'woocommerce_get_item_downloads', $files, $item, $this );
	}

	/**
	 * Validates subscription date updates ensuring the proposed date changes are in the correct format and are compatible with
	 * the current subscription dates. Also returns the dates in the gmt timezone - ready for setting/deleting.
	 *
	 * @param array $dates array containing dates with keys: 'date_created', 'trial_end', 'next_payment', 'last_order_date_created' or 'end'. Values are MySQL formatted date/time strings in UTC timezone.
	 * @param string $timezone The timezone of the $datetime param. Default 'gmt'.
	 * @return array $dates array of dates in gmt timezone.
	 */
	public function validate_date_updates( $dates, $timezone = 'gmt' ) {

		if ( ! is_array( $dates ) ) {
			throw new InvalidArgumentException( __( 'Invalid format. First parameter needs to be an array.', 'woocommerce-subscriptions' ) );
		}

		if ( empty( $dates ) ) {
			throw new InvalidArgumentException( __( 'Invalid data. First parameter was empty when passed to update_dates().', 'woocommerce-subscriptions' ) );
		}

		$passed_date_keys = array_map( 'wcs_normalise_date_type_key', array_keys( $dates ) );
		$extra_keys       = array_diff( $passed_date_keys, $this->get_valid_date_types() );

		if ( ! empty( $extra_keys ) ) {
			throw new InvalidArgumentException( __( 'Invalid data. First parameter has a date that is not in the registered date types.', 'woocommerce-subscriptions' ) );
		}

		// Use the normalised keys for the array
		$dates = array_combine( $passed_date_keys, array_values( $dates ) );

		$timestamps = $delete_date_types = array();

		// Get a full set of subscription dates made up of passed and current dates
		foreach ( $this->get_valid_date_types() as $date_type ) {

			// While 'last_payment' is a valid date type, it is deprecated and we use 'last_order_date_created' now instead
			if ( 'last_payment' === $date_type ) {
				continue;
			}

			// We don't want to validate dates for related orders when instantiating the subscription
			if ( false === $this->object_read && ( 0 === strpos( $date_type, 'last_order_date_' ) || in_array( $date_type, array( 'date_paid', 'date_completed' ) ) ) ) {
				continue;
			}

			// Honour passed values first
			if ( isset( $dates[ $date_type ] ) ) {
				$datetime = $dates[ $date_type ];

				if ( ! empty( $datetime ) && false === wcs_is_datetime_mysql_format( $datetime ) ) {
					// translators: placeholder is date type (e.g. "end", "next_payment"...)
					throw new InvalidArgumentException( sprintf( _x( 'Invalid %s date. The date must be of the format: "Y-m-d H:i:s".', 'appears in an error message if date is wrong format', 'woocommerce-subscriptions' ), $date_type ) );
				}

				if ( empty( $datetime ) ) {

					$timestamps[ $date_type ] = 0;

				} else {

					if ( 'gmt' !== strtolower( $timezone ) ) {
						$datetime = get_gmt_from_date( $datetime );
					}

					$timestamps[ $date_type ] = wcs_date_to_time( $datetime );
				}
			// otherwise get the current subscription time
			} else {
				$timestamps[ $date_type ] = $this->get_time( $date_type );
			}

			if ( 0 == $timestamps[ $date_type ] ) {
				// Last payment is not in the UI, and it should NOT be deleted as that would mess with scheduling
				if ( 'last_order_date_created' != $date_type && 'date_created' != $date_type ) {
					// We need to separate the dates which need deleting, so they don't interfere in the remaining validation
					$delete_date_types[ $date_type ] = 0;
				}
				unset( $timestamps[ $date_type ] );
			}
		}

		$messages = array();

		// And then iterate over them checking the relationships between them.
		foreach ( $timestamps as $date_type => $timestamp ) {
			switch ( $date_type ) {
				case 'end':
					if ( array_key_exists( 'cancelled', $timestamps ) && $timestamp < $timestamps['cancelled'] ) {
						// translators: %s: date type (e.g. "end").
						$messages[] = sprintf( __( 'The %s date must occur after the cancellation date.', 'woocommerce-subscriptions' ), $date_type );
					}

				case 'cancelled':
					if ( array_key_exists( 'last_order_date_created', $timestamps ) && $timestamp < $timestamps['last_order_date_created'] ) {
						// translators: %s: date type (e.g. "end").
						$messages[] = sprintf( __( 'The %s date must occur after the last payment date.', 'woocommerce-subscriptions' ), $date_type );
					}

					if ( array_key_exists( 'next_payment', $timestamps ) && $timestamp <= $timestamps['next_payment'] ) {
						// translators: %s: date type (e.g. "end").
						$messages[] = sprintf( __( 'The %s date must occur after the next payment date.', 'woocommerce-subscriptions' ), $date_type );
					}
				case 'next_payment':
					// Guarantees that end is strictly after trial_end, because if next_payment and end can't be at same time
					if ( array_key_exists( 'trial_end', $timestamps ) && $timestamp < $timestamps['trial_end'] ) {
						// translators: %s: date type (e.g. "end").
						$messages[] = sprintf( __( 'The %s date must occur after the trial end date.', 'woocommerce-subscriptions' ), $date_type );
					}
				case 'trial_end':
					if ( ! in_array( $date_type, array( 'end', 'cancelled' ) ) && $timestamp <= $timestamps['start'] ) {
						// translators: %s: date type (e.g. "next_payment").
						$messages[] = sprintf( __( 'The %s date must occur after the start date.', 'woocommerce-subscriptions' ), $date_type );
					}
			}

			$dates[ $date_type ] = gmdate( 'Y-m-d H:i:s', $timestamp );
		}

		// Don't validate dates while the subscription is being read, only dates set outside of instantiation require the strict validation rules to apply
		if ( $this->object_read && ! empty( $messages ) ) {
			// translators: %d: order ID.
			throw new Exception( sprintf( __( 'Subscription #%d: ', 'woocommerce-subscriptions' ), $this->get_id() ) . join( ' ', $messages ) );
		}

		return array_merge( $dates, $delete_date_types );
	}

	/**
	 * Add a product line item to the subscription.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.1.4
	 * @param WC_Product product
	 * @param int line item quantity.
	 * @param array args
	 * @return int|bool Item ID or false.
	 */
	public function add_product( $product, $qty = 1, $args = array() ) {
		$item_id = parent::add_product( $product, $qty, $args );

		// Remove backordered meta if it has been added
		if ( $item_id && $product->backorders_require_notification() && $product->is_on_backorder( $qty ) ) {
			wc_delete_order_item_meta( $item_id, apply_filters( 'woocommerce_backordered_item_meta_name', __( 'Backordered', 'woocommerce-subscriptions' ) ) );
		}

		return $item_id;
	}

	/**
	 * Get the set of date types that can be set/get from this subscription.
	 *
	 * The allowed dates includes both subscription date dates, and date types for related orders, like 'last_order_date_created'.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @return array
	 */
	protected function get_valid_date_types() {

		if ( empty( $this->valid_date_types ) ) {
			$this->valid_date_types = apply_filters( 'woocommerce_subscription_valid_date_types', array_merge(
				array_keys( wcs_get_subscription_date_types() ),
				array(
					'date_created',
					'date_modified',
					'date_paid',
					'date_completed',
					'last_order_date_created',
					'last_order_date_paid',
					'last_order_date_completed',
					'payment_retry',
				)
			), $this );
		}

		return $this->valid_date_types;
	}

	/**
	 * Generates a URL to add or change the subscription's payment method from the my account page.
	 *
	 * @return string
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.5.0
	 */
	public function get_change_payment_method_url() {
		$change_payment_method_url = wc_get_endpoint_url( 'subscription-payment-method', $this->get_id(), wc_get_page_permalink( 'myaccount' ) );
		return apply_filters( 'wcs_get_change_payment_method_url', $change_payment_method_url, $this->get_id() );
	}

	/* Get the subscription's payment method meta.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.4.3
	 * @return array The subscription's payment meta in the format returned by the woocommerce_subscription_payment_meta filter.
	 */
	public function get_payment_method_meta() {
		WC()->payment_gateways();

		if ( $this->is_manual() ) {
			return array();
		}

		$payment_meta = apply_filters( 'woocommerce_subscription_payment_meta', array(), $this );

		return isset( $payment_meta[ $this->get_payment_method() ] ) ? $payment_meta[ $this->get_payment_method() ] : array();
	}

	/************************
	 * WC_Order overrides
	 *
	 * Make some WC_Order methods do nothing.
	 ************************/

	/**
	 * Avoid running the expensive get_date_paid() query on related orders.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.19
	 */
	public function maybe_set_date_paid() {
		return null;
	}

	/**
	 * Avoid running the expensive get_date_completed() query on related orders.
	 *
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.19
	 */
	protected function maybe_set_date_completed() {
		return null;
	}

	/**
	 * Get totals for display on pages and in emails.
	 *
	 * @param mixed $tax_display Excl or incl tax display mode.
	 * @return array
	 */
	public function get_order_item_totals( $tax_display = '' ) {
		$total_rows = parent::get_order_item_totals( $tax_display );

		// Use get_payment_method_to_display() as it displays "Manual Renewal" for manual subscriptions.
		if ( isset( $total_rows['payment_method'] ) ) {
			$total_rows['payment_method']['value'] = $this->get_payment_method_to_display( 'customer' );
		}

		return apply_filters( 'woocommerce_get_subscription_item_totals', $total_rows, $this, $tax_display );
	}

	/************************
	 * Deprecated Functions *
	 ************************/

	/**
	 * Set or change the WC_Order ID which records the subscription's initial purchase.
	 *
	 * @param int|WC_Order $order
	 */
	public function update_parent( $order ) {
		wcs_deprecated_function( __METHOD__, '2.2.0', __CLASS__ . '::set_parent_id(), because WooCommerce 3.0+ now uses that' );

		if ( ! is_object( $order ) ) {
			$order = wc_get_order( $order );
		}

		$this->set_parent_id( wcs_get_objects_property( $order, 'id' ) );

		// And update the parent in memory
		$this->order = $order;
	}

	/**
	 * Update the internal tally of suspensions on this subscription since the last payment.
	 *
	 * @return int The count of suspensions
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	public function update_suspension_count( $new_count ) {
		wcs_deprecated_function( __METHOD__, '2.2.0', __CLASS__ . '::set_suspension_count(), because WooCommerce 3.0+ now uses setters' );
		$this->set_suspension_count( $new_count );
		return $this->get_suspension_count();
	}

	/**
	 * Checks if the subscription requires manual renewal payments.
	 *
	 * @access public
	 * @return bool
	 */
	public function update_manual( $is_manual = true ) {
		wcs_deprecated_function( __METHOD__, '2.2.0', __CLASS__ . '::set_requires_manual_renewal( $is_manual ), because WooCommerce 3.0+ now uses setters' );
		$this->set_requires_manual_renewal( $is_manual );
		return $this->get_requires_manual_renewal();
	}

	/**
	 * Get the "last payment date" for a subscription, in GMT/UTC.
	 *
	 * The "last payment date" is based on the original order used to purchase the subscription or
	 * it's last renewal order, which ever is more recent.
	 *
	 * The "last payment date" is in quotation marks because this function didn't and still doesn't
	 * accurately return the last payment date. Instead, it returned and still returns the date of the
	 * last order, regardless of its paid status. This is partly why this function has been deprecated
	 * in favour of self::get_date_paid() (or self::get_related_orders_date( 'date_created', 'last' ).
	 *
	 * For backward compatibility we have to use the date created here, see: https://github.com/Prospress/woocommerce-subscriptions/issues/1943
	 *
	 * @deprecated 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.0
	 */
	protected function get_last_payment_date() {
		wcs_deprecated_function( __METHOD__, '2.2.0', __CLASS__ . '::get_date( "last_order_date_created" )' );
		return $this->get_date( 'last_order_date_created' );
	}

	/**
	 * Updated both the _paid_date and post date GMT with the WooCommerce < 3.0 date storage structures.
	 *
	 * @deprecated 1.0.0 - Migrated from WooCommerce Subscriptions v2.2.0
	 * @param string $datetime A MySQL formatted date/time string in GMT/UTC timezone.
	 */
	protected function update_last_payment_date( $datetime ) {
		wcs_deprecated_function( __METHOD__, '2.2.0', __CLASS__ . '::set_date_paid( $datetime ) or WC_Order::set_date_created( $datetime ) on the last order, because WooCommerce 3.0 now uses those setters' );

		$last_order = $this->get_last_order();

		if ( ! $last_order ) {
			return false;
		}

		// Pass a timestamp to the WC 3.0 setters because WC expects MySQL date strings to be in site's timezone, but we have a date string in UTC timezone
		$timestamp = ( $datetime > 0 ) ? wcs_date_to_time( $datetime ) : 0;

		$this->set_last_order_date( 'date_paid', $timestamp );
		$this->set_last_order_date( 'date_created', $timestamp );

		return $datetime;
	}

	/**
	 * Get the number of payments completed for a subscription
	 *
	 * Completed payment include all renewal orders and potentially an initial order (if the
	 * subscription was created as a result of a purchase from the front end rather than
	 * manually by the store manager).
	 *
	 * @deprecated 1.0.0 - Migrated from WooCommerce Subscriptions v2.6.0
	 */
	public function get_completed_payment_count() {
		wcs_deprecated_function( __METHOD__, '2.6.0', __CLASS__ . '::get_payment_count()' );

		return $this->get_payment_count();
	}

	/**
	 * Apply the deprecated 'woocommerce_subscription_payment_completed_count' filter
	 * to maintain backward compatibility.
	 *
	 * @param int $count
	 *
	 * @return int
	 *
	 * @deprecated 1.0.0 - Migrated from WooCommerce Subscriptions v2.6.0
	 */
	protected function apply_deprecated_completed_payment_count_filter( $count ) {
		$deprecated_filter_hook = 'woocommerce_subscription_payment_completed_count';

		if ( has_filter( $deprecated_filter_hook ) ) {
			wcs_deprecated_hook( $deprecated_filter_hook, '2.6.0', '"woocommerce_subscription_parent_payment_completed_count" and "woocommerce_subscription_renewal_payment_completed_count" to provide the discrete counts summed in the "' . $deprecated_filter_hook . '" filter' );
			$count = apply_filters( $deprecated_filter_hook, $count );
		}

		return $count;
	}
}
