<?php
class ModelReportReturn extends Model {

    public function getReturns($data = array()) {
        $sql = "SELECT MIN(r.date_added) AS date_start, MAX(r.date_added) AS date_end, COUNT(r.return_id) AS `returns` FROM `" . DB_PREFIX . "return` r";

        if (!empty($data['filter_return_status_id'])) {
            $sql .= " WHERE r.return_status_id = '" . (int)$data['filter_return_status_id'] . "'";
        } else {
            $sql .= " WHERE r.return_status_id > '0'";
        }

        if (!empty($data['filter_date_start'])) {
            $sql .= " AND DATE(r.date_added) >= '" . $this->db->escape($data['filter_date_start']) . "'";
        }

        if (!empty($data['filter_date_end'])) {
            $sql .= " AND DATE(r.date_added) <= '" . $this->db->escape($data['filter_date_end']) . "'";
        }

        if (isset($data['filter_group'])) {
            $group = $data['filter_group'];
        } else {
            $group = 'week';
        }

        switch ($group) {
            case 'day';
                $sql .= " GROUP BY YEAR(r.date_added), MONTH(r.date_added), DAY(r.date_added)";
                break;
            default:
            case 'week':
                $sql .= " GROUP BY YEAR(r.date_added), WEEK(r.date_added)";
                break;
            case 'month':
                $sql .= " GROUP BY YEAR(r.date_added), MONTH(r.date_added)";
                break;
            case 'year':
                $sql .= " GROUP BY YEAR(r.date_added)";
                break;
        }

        if (isset($data['start']) || isset($data['limit'])) {
            if ($data['start'] < 0) {
                $data['start'] = 0;
            }

            if ($data['limit'] < 1) {
                $data['limit'] = 20;
            }

            $sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
        }

        $query = $this->db->query($sql);

        return $query->rows;
    }

    public function getTotalReturns($data = array()) {
        if (!empty($data['filter_group'])) {
            $group = $data['filter_group'];
        } else {
            $group = 'week';
        }

        switch ($group) {
            case 'day';
                $sql = "SELECT COUNT(DISTINCT YEAR(date_added), MONTH(date_added), DAY(date_added)) AS total FROM `" . DB_PREFIX . "return`";
                break;
            default:
            case 'week':
                $sql = "SELECT COUNT(DISTINCT YEAR(date_added), WEEK(date_added)) AS total FROM `" . DB_PREFIX . "return`";
                break;
            case 'month':
                $sql = "SELECT COUNT(DISTINCT YEAR(date_added), MONTH(date_added)) AS total FROM `" . DB_PREFIX . "return`";
                break;
            case 'year':
                $sql = "SELECT COUNT(DISTINCT YEAR(date_added)) AS total FROM `" . DB_PREFIX . "return`";
                break;
        }

        if (!empty($data['filter_return_status_id'])) {
            $sql .= " WHERE return_status_id = '" . (int)$data['filter_return_status_id'] . "'";
        } else {
            $sql .= " WHERE return_status_id > '0'";
        }

        if (!empty($data['filter_date_start'])) {
            $sql .= " AND DATE(date_added) >= '" . $this->db->escape($data['filter_date_start']) . "'";
        }

        if (!empty($data['filter_date_end'])) {
            $sql .= " AND DATE(date_added) <= '" . $this->db->escape($data['filter_date_end']) . "'";
        }

        $query = $this->db->query($sql);

        return $query->row['total'];
    }

}