<?php
class ModelCatalogFilter extends Model {

    public function addFilter($data) {
        $this->db->query("INSERT INTO `" . DB_PREFIX . "filter_group` SET sort_order = '" . (int)$data['sort_order'] . "'");

        $filter_group_id = $this->db->getLastId();

        foreach ($data['filter_group_description'] as $language_id => $value) {
            $this->db->query("INSERT INTO " . DB_PREFIX . "filter_group_description SET filter_group_id = '" . (int)$filter_group_id . "', language_id = '" . (int)$language_id . "', name = '" . $this->db->escape($value['name']) . "'");
        }

        if (isset($data['filter'])) {
            foreach ($data['filter'] as $filter) {
                $this->db->query("INSERT INTO " . DB_PREFIX . "filter SET filter_group_id = '" . (int)$filter_group_id . "', sort_order = '" . (int)$filter['sort_order'] . "'");

                $filter_id = $this->db->getLastId();

                foreach ($filter['filter_description'] as $language_id => $filter_description) {
                    $this->db->query("INSERT INTO " . DB_PREFIX . "filter_description SET filter_id = '" . (int)$filter_id . "', language_id = '" . (int)$language_id . "', filter_group_id = '" . (int)$filter_group_id . "', name = '" . $this->db->escape($filter_description['name']) . "'");
                }
            }
        }

        return $filter_group_id;
    }

    public function editFilter($filter_group_id, $data) {
        $this->db->query("UPDATE `" . DB_PREFIX . "filter_group` SET sort_order = '" . (int)$data['sort_order'] . "' WHERE filter_group_id = '" . (int)$filter_group_id . "'");

        $this->db->query("DELETE FROM " . DB_PREFIX . "filter_group_description WHERE filter_group_id = '" . (int)$filter_group_id . "'");

        foreach ($data['filter_group_description'] as $language_id => $value) {
            $this->db->query("INSERT INTO " . DB_PREFIX . "filter_group_description SET filter_group_id = '" . (int)$filter_group_id . "', language_id = '" . (int)$language_id . "', name = '" . $this->db->escape($value['name']) . "'");
        }

        $this->db->query("DELETE FROM " . DB_PREFIX . "filter WHERE filter_group_id = '" . (int)$filter_group_id . "'");
        $this->db->query("DELETE FROM " . DB_PREFIX . "filter_description WHERE filter_group_id = '" . (int)$filter_group_id . "'");

        if (isset($data['filter'])) {
            foreach ($data['filter'] as $filter) {
                if ($filter['filter_id']) {
                    $this->db->query("INSERT INTO " . DB_PREFIX . "filter SET filter_id = '" . (int)$filter['filter_id'] . "', filter_group_id = '" . (int)$filter_group_id . "', sort_order = '" . (int)$filter['sort_order'] . "'");
                } else {
                    $this->db->query("INSERT INTO " . DB_PREFIX . "filter SET filter_group_id = '" . (int)$filter_group_id . "', sort_order = '" . (int)$filter['sort_order'] . "'");
                }

                $filter_id = $this->db->getLastId();

                foreach ($filter['filter_description'] as $language_id => $filter_description) {
                    $this->db->query("INSERT INTO " . DB_PREFIX . "filter_description SET filter_id = '" . (int)$filter_id . "', language_id = '" . (int)$language_id . "', filter_group_id = '" . (int)$filter_group_id . "', name = '" . $this->db->escape($filter_description['name']) . "'");
                }
            }
        }
    }

    public function deleteFilter($filter_group_id) {
        $this->db->query("DELETE FROM `" . DB_PREFIX . "filter_group` WHERE filter_group_id = '" . (int)$filter_group_id . "'");
        $this->db->query("DELETE FROM `" . DB_PREFIX . "filter_group_description` WHERE filter_group_id = '" . (int)$filter_group_id . "'");
        $this->db->query("DELETE FROM `" . DB_PREFIX . "filter` WHERE filter_group_id = '" . (int)$filter_group_id . "'");
        $this->db->query("DELETE FROM `" . DB_PREFIX . "filter_description` WHERE filter_group_id = '" . (int)$filter_group_id . "'");
    }

    public function getFilterGroup($filter_group_id) {
        $query = $this->db->query("SELECT * FROM `" . DB_PREFIX . "filter_group` fg LEFT JOIN " . DB_PREFIX . "filter_group_description fgd ON (fg.filter_group_id = fgd.filter_group_id) WHERE fg.filter_group_id = '" . (int)$filter_group_id . "' AND fgd.language_id = '" . (int)$this->config->get('config_language_id') . "'");

        return $query->row;
    }

    public function getFilterGroups($data = array()) {
        $sql = "SELECT * FROM `" . DB_PREFIX . "filter_group` fg LEFT JOIN " . DB_PREFIX . "filter_group_description fgd ON (fg.filter_group_id = fgd.filter_group_id) WHERE fgd.language_id = '" . (int)$this->config->get('config_language_id') . "'";

        $sort_data = array(
            'fgd.name',
            'fg.sort_order'
        );

        if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
            $sql .= " ORDER BY " . $data['sort'];
        } else {
            $sql .= " ORDER BY fgd.name";
        }

        if (isset($data['order']) && ($data['order'] == 'DESC')) {
            $sql .= " DESC";
        } else {
            $sql .= " ASC";
        }

        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 getFilterGroupDescriptions($filter_group_id) {
        $filter_group_data = array();

        $query = $this->db->query("SELECT * FROM " . DB_PREFIX . "filter_group_description WHERE filter_group_id = '" . (int)$filter_group_id . "'");

        foreach ($query->rows as $result) {
            $filter_group_data[$result['language_id']] = array( 'name' => $result['name'] );
        }

        return $filter_group_data;
    }

    public function getFilter($filter_id) {
        $query = $this->db->query("SELECT *, (SELECT name FROM " . DB_PREFIX . "filter_group_description fgd WHERE f.filter_group_id = fgd.filter_group_id AND fgd.language_id = '" . (int)$this->config->get('config_language_id') . "') AS `group` FROM " . DB_PREFIX . "filter f LEFT JOIN " . DB_PREFIX . "filter_description fd ON (f.filter_id = fd.filter_id) WHERE f.filter_id = '" . (int)$filter_id . "' AND fd.language_id = '" . (int)$this->config->get('config_language_id') . "'");

        return $query->row;
    }

    public function getFilters($data) {
        $sql = "SELECT *, (SELECT name FROM " . DB_PREFIX . "filter_group_description fgd WHERE f.filter_group_id = fgd.filter_group_id AND fgd.language_id = '" . (int)$this->config->get('config_language_id') . "') AS `group` FROM " . DB_PREFIX . "filter f LEFT JOIN " . DB_PREFIX . "filter_description fd ON (f.filter_id = fd.filter_id) WHERE fd.language_id = '" . (int)$this->config->get('config_language_id') . "'";

        if (!empty($data['filter_name'])) {
            $sql .= " AND fd.name LIKE '" . $this->db->escape($data['filter_name']) . "%'";
        }

        $sql .= " ORDER BY f.sort_order ASC";

        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 getFilterDescriptions($filter_group_id) {
        $filter_data = array();

        $filter_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "filter WHERE filter_group_id = '" . (int)$filter_group_id . "'");

        foreach ($filter_query->rows as $filter) {
            $filter_description_data = array();

            $filter_description_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "filter_description WHERE filter_id = '" . (int)$filter['filter_id'] . "'");

            foreach ($filter_description_query->rows as $filter_description) {
                $filter_description_data[$filter_description['language_id']] = array(
                    'name' => $filter_description['name'] );
            }

            $filter_data[] = array(
                'filter_id'          => $filter['filter_id'],
                'filter_description' => $filter_description_data,
                'sort_order'         => $filter['sort_order']
            );
        }

        return $filter_data;
    }

    public function getTotalFilterGroups() {
        $query = $this->db->query("SELECT COUNT(*) AS total FROM `" . DB_PREFIX . "filter_group`");

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

}