<?php

/**
 * Product - Vollständige Produktverwaltung
 */
class Product extends ObjectModel
{
    /** @var string Tax name */
    public $tax_name = 'deprecated';

    /** @var float Tax rate */
    public $tax_rate;

    /** @var int Manufacturer identifier */
    public $id_manufacturer;

    /** @var int Supplier identifier */
    public $id_supplier;

    /** @var int default Category identifier */
    public $id_category_default;

    /** @var int default Shop identifier */
    public $id_shop_default;

    /** @var string Manufacturer name */
    public $manufacturer_name;

    /** @var string Supplier name */
    public $supplier_name;

    /** @var string|array Name or array of names by id_lang */
    public $name;

    /** @var string|array Long description or array of long description by id_lang */
    public $description;

    /** @var string|array Short description or array of short description by id_lang */
    public $description_short;

    /** @var int Quantity available */
    public $quantity = 0;

    /** @var int Minimal quantity for add to cart */
    public $minimal_quantity = 1;

    /** @var int|null Low stock for mail alert */
    public $low_stock_threshold = null;

    /** @var bool Low stock mail alert activated */
    public $low_stock_alert = false;

    /** @var string|array Text when in stock or array of text by id_lang */
    public $available_now;

    /** @var string|array Text when not in stock but available to order or array of text by id_lang */
    public $available_later;

    /** @var float|null Price */
    public $price = 0;

    /** @var array|int|null Will be filled by reference by priceCalculation() */
    public $specificPrice = 0;

    /** @var float Additional shipping cost */
    public $additional_shipping_cost = 0;

    /** @var float Wholesale Price in euros */
    public $wholesale_price = 0;

    /** @var bool on_sale */
    public $on_sale = false;

    /** @var bool online_only */
    public $online_only = false;

    /** @var string unity */
    public $unity = null;

    /** @var float|null price for product's unity */
    public $unit_price = 0;

    /** @var float price for product's unity ratio */
    public $unit_price_ratio = 0;

    /** @var float|null Ecotax */
    public $ecotax = 0;

    /** @var string Reference */
    public $reference;

    /** @var string Supplier Reference */
    public $supplier_reference;

    /** @var string Location */
    public $location = '';

    /** @var string|float Width in default width unit */
    public $width = 0;

    /** @var string|float Height in default height unit */
    public $height = 0;

    /** @var string|float Depth in default depth unit */
    public $depth = 0;

    /** @var string|float Weight in default weight unit */
    public $weight = 0;

    /** @var string Ean-13 barcode */
    public $ean13;

    /** @var string ISBN */
    public $isbn;

    /** @var string Upc barcode */
    public $upc;

    /** @var string MPN */
    public $mpn;

    /** @var string|string[] Friendly URL or array of friendly URL by id_lang */
    public $link_rewrite;

    /** @var string|array Meta description or array of meta description by id_lang */
    public $meta_description;

    /** @var string|array Meta title or array of meta title by id_lang */
    public $meta_title;

    /** @var mixed */
    public $quantity_discount = 0;

    /** @var bool|int Product customization */
    public $customizable;

    /** @var bool|null Product is new */
    public $new = null;

    /** @var int Number of uploadable files (concerning customizable products) */
    public $uploadable_files;

    /** @var int Number of text fields */
    public $text_fields;

    /** @var bool Active */
    public $active = true;

    /** @var bool Redirect type */
    public $redirect_type = '';

    /** @var int Redirect target */
    public $id_type_redirected = 0;

    /** @var bool Available for order */
    public $available_for_order = true;

    /** @var string Available date */
    public $available_date = '0000-00-00';

    /** @var bool Show price */
    public $show_price = true;

    /** @var bool indexed */
    public $indexed = false;

    /** @var string Visibility */
    public $visibility = 'both';

    /** @var bool Cache is pack */
    public $cache_is_pack = false;

    /** @var bool Cache has attachments */
    public $cache_has_attachments = false;

    /** @var bool Is virtual */
    public $is_virtual = false;

    /** @var int Cache default attribute */
    public $cache_default_attribute = 0;

    /** @var string Date add */
    public $date_add;

    /** @var string Date upd */
    public $date_upd;

    /** @var array Product definition */
    public static $definition = [
        'table' => 'product',
        'primary' => 'id_product',
        'multilang' => true,
        'multilang_shop' => true,
        'fields' => [
            'id_manufacturer' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedId'],
            'id_supplier' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedId'],
            'id_category_default' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedId'],
            'id_shop_default' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedId'],
            'id_tax_rules_group' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedId'],
            'on_sale' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'online_only' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'ecotax' => ['type' => self::TYPE_FLOAT, 'validate' => 'isPrice'],
            'minimal_quantity' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'],
            'low_stock_threshold' => ['type' => self::TYPE_INT],
            'low_stock_alert' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'price' => ['type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true],
            'wholesale_price' => ['type' => self::TYPE_FLOAT, 'validate' => 'isPrice'],
            'unity' => ['type' => self::TYPE_STRING, 'validate' => 'isString'],
            'unit_price_ratio' => ['type' => self::TYPE_FLOAT, 'validate' => 'isUnsignedFloat'],
            'additional_shipping_cost' => ['type' => self::TYPE_FLOAT, 'validate' => 'isPrice'],
            'customizable' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'],
            'uploadable_files' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'],
            'text_fields' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'],
            'active' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'redirect_type' => ['type' => self::TYPE_STRING, 'validate' => 'isString'],
            'id_type_redirected' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedId'],
            'available_for_order' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'available_date' => ['type' => self::TYPE_DATE, 'validate' => 'isDateFormat'],
            'show_price' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'indexed' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'visibility' => ['type' => self::TYPE_STRING, 'validate' => 'isProductVisibility'],
            'cache_is_pack' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'cache_has_attachments' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'is_virtual' => ['type' => self::TYPE_BOOL, 'validate' => 'isBool'],
            'cache_default_attribute' => ['type' => self::TYPE_INT, 'validate' => 'isUnsignedId'],
            'date_add' => ['type' => self::TYPE_DATE, 'validate' => 'isDate'],
            'date_upd' => ['type' => self::TYPE_DATE, 'validate' => 'isDate'],
            /* Lang fields */
            'name' => ['type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isCatalogName', 'required' => true, 'size' => 128],
            'description' => ['type' => self::TYPE_HTML, 'lang' => true, 'validate' => 'isCleanHtml'],
            'description_short' => ['type' => self::TYPE_HTML, 'lang' => true, 'validate' => 'isCleanHtml'],
            'available_now' => ['type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName'],
            'available_later' => ['type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName'],
            'link_rewrite' => ['type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isLinkRewrite', 'required' => true, 'size' => 128],
            'meta_description' => ['type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'size' => 255],
            'meta_keywords' => ['type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'size' => 255],
            'meta_title' => ['type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'size' => 128],
        ],
    ];

    /**
     * Constructor
     */
    public function __construct($id_product = null, $full = false, $id_lang = null, $id_shop = null, $context = null)
    {
        parent::__construct($id_product, $id_lang, $id_shop);
        
        if ($id_product) {
            $this->id = (int) $id_product;
            if ($full) {
                $this->loadFullProduct();
            }
        }
    }

    /**
     * Load full product data
     */
    protected function loadFullProduct()
    {
        // Load basic product data
        $sql = 'SELECT * FROM `' . _DB_PREFIX_ . 'product` WHERE `id_product` = ' . (int) $this->id;
        $result = Db::getInstance()->getRow($sql);
        
        if ($result) {
            $this->hydrate($result);
        }
        
        // Load multilingual data
        if ($this->id_lang) {
            $sql = 'SELECT * FROM `' . _DB_PREFIX_ . 'product_lang` WHERE `id_product` = ' . (int) $this->id . ' AND `id_lang` = ' . (int) $this->id_lang;
            $result = Db::getInstance()->getRow($sql);
            
            if ($result) {
                $this->hydrate($result);
            }
        }
    }

    /**
     * Get products
     */
    public static function getProducts($id_lang, $start, $limit, $order_by, $order_way, $id_category = false, $only_active = false, $context = null)
    {
        $sql = 'SELECT p.*, pl.*, m.`name` as manufacturer_name, s.`name` as supplier_name
                FROM `' . _DB_PREFIX_ . 'product` p
                LEFT JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (p.`id_product` = pl.`id_product`)
                LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
                LEFT JOIN `' . _DB_PREFIX_ . 'supplier` s ON (s.`id_supplier` = p.`id_supplier`)
                WHERE pl.`id_lang` = ' . (int) $id_lang;
        
        if ($id_category) {
            $sql .= ' AND cp.`id_category` = ' . (int) $id_category;
        }
        
        if ($only_active) {
            $sql .= ' AND p.`active` = 1';
        }
        
        $sql .= ' ORDER BY ' . pSQL($order_by) . ' ' . pSQL($order_way);
        $sql .= ' LIMIT ' . (int) $start . ', ' . (int) $limit;
        
        $results = Db::getInstance()->executeS($sql);
        $products = [];
        
        foreach ($results as $result) {
            $product = new Product();
            $product->hydrate($result);
            $products[] = $product;
        }
        
        return $products;
    }

    /**
     * Get new products
     */
    public static function getNewProducts($id_lang, $page_number = 0, $nb_products = 10, $count = false, $order_by = null, $order_way = null, $context = null)
    {
        $sql = 'SELECT p.*, pl.*, m.`name` as manufacturer_name, s.`name` as supplier_name
                FROM `' . _DB_PREFIX_ . 'product` p
                LEFT JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (p.`id_product` = pl.`id_product`)
                LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
                LEFT JOIN `' . _DB_PREFIX_ . 'supplier` s ON (s.`id_supplier` = p.`id_supplier`)
                WHERE pl.`id_lang` = ' . (int) $id_lang . '
                AND p.`active` = 1
                AND p.`new` = 1';
        
        if ($order_by) {
            $sql .= ' ORDER BY ' . pSQL($order_by) . ' ' . pSQL($order_way);
        }
        
        if (!$count) {
            $sql .= ' LIMIT ' . (int) ($page_number * $nb_products) . ', ' . (int) $nb_products;
        }
        
        $results = Db::getInstance()->executeS($sql);
        
        if ($count) {
            return count($results);
        }
        
        $products = [];
        foreach ($results as $result) {
            $product = new Product();
            $product->hydrate($result);
            $products[] = $product;
        }
        
        return $products;
    }

    /**
     * Get prices drop
     */
    public static function getPricesDrop($id_lang, $page_number = 0, $nb_products = 10, $count = false, $order_by = null, $order_way = null, $beginning = false, $ending = false, $context = null)
    {
        $sql = 'SELECT p.*, pl.*, m.`name` as manufacturer_name, s.`name` as supplier_name
                FROM `' . _DB_PREFIX_ . 'product` p
                LEFT JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (p.`id_product` = pl.`id_product`)
                LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
                LEFT JOIN `' . _DB_PREFIX_ . 'supplier` s ON (s.`id_supplier` = p.`id_supplier`)
                WHERE pl.`id_lang` = ' . (int) $id_lang . '
                AND p.`active` = 1
                AND p.`on_sale` = 1';
        
        if ($beginning && $ending) {
            $sql .= ' AND p.`date_add` BETWEEN "' . pSQL($beginning) . '" AND "' . pSQL($ending) . '"';
        }
        
        if ($order_by) {
            $sql .= ' ORDER BY ' . pSQL($order_by) . ' ' . pSQL($order_way);
        }
        
        if (!$count) {
            $sql .= ' LIMIT ' . (int) ($page_number * $nb_products) . ', ' . (int) $nb_products;
        }
        
        $results = Db::getInstance()->executeS($sql);
        
        if ($count) {
            return count($results);
        }
        
        $products = [];
        foreach ($results as $result) {
            $product = new Product();
            $product->hydrate($result);
            $products[] = $product;
        }
        
        return $products;
    }

    /**
     * Get price
     */
    public function getPrice($tax = true, $id_product_attribute = null, $decimals = 6, $divisor = null, $only_reduc = false, $usereduc = true, $quantity = 1)
    {
        $price = $this->price;
        
        if ($tax) {
            $price = $price * (1 + ($this->tax_rate / 100));
        }
        
        return Tools::ps_round($price, $decimals);
    }

    /**
     * Get price static
     */
    public static function getPriceStatic($id_product, $usetax = true, $id_product_attribute = null, $decimals = 6, $divisor = null, $only_reduc = false, $usereduc = true, $quantity = 1, $force_associated_tax = false, $id_customer = null, $id_cart = null, $id_address = null, &$specific_price_output = null, $with_ecotax = true, $use_group_reduction = true, $context = null, $use_customer_price = true, $id_customization = null)
    {
        $product = new Product($id_product);
        return $product->getPrice($usetax, $id_product_attribute, $decimals, $divisor, $only_reduc, $usereduc, $quantity);
    }

    /**
     * Get quantity
     */
    public static function getQuantity($idProduct, $idProductAttribute = null, $cacheIsPack = null, $cart = null, $idCustomization = null)
    {
        $sql = 'SELECT `quantity` FROM `' . _DB_PREFIX_ . 'stock_available` WHERE `id_product` = ' . (int) $idProduct;
        
        if ($idProductAttribute) {
            $sql .= ' AND `id_product_attribute` = ' . (int) $idProductAttribute;
        }
        
        $result = Db::getInstance()->getRow($sql);
        return $result ? (int) $result['quantity'] : 0;
    }

    /**
     * Check quantity
     */
    public function checkQty($qty)
    {
        $quantity = self::getQuantity($this->id);
        return $qty <= $quantity;
    }

    /**
     * Get images
     */
    public function getImages($id_lang, $context = null)
    {
        $sql = 'SELECT i.*, il.*
                FROM `' . _DB_PREFIX_ . 'image` i
                LEFT JOIN `' . _DB_PREFIX_ . 'image_lang` il ON (i.`id_image` = il.`id_image`)
                WHERE i.`id_product` = ' . (int) $this->id . '
                AND il.`id_lang` = ' . (int) $id_lang . '
                ORDER BY i.`position`';
        
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Get cover
     */
    public static function getCover($id_product, $context = null)
    {
        $sql = 'SELECT i.*
                FROM `' . _DB_PREFIX_ . 'image` i
                WHERE i.`id_product` = ' . (int) $id_product . '
                AND i.`cover` = 1';
        
        return Db::getInstance()->getRow($sql);
    }

    /**
     * Get categories
     */
    public function getCategories()
    {
        $sql = 'SELECT c.*, cl.*
                FROM `' . _DB_PREFIX_ . 'category_product` cp
                LEFT JOIN `' . _DB_PREFIX_ . 'category` c ON (cp.`id_category` = c.`id_category`)
                LEFT JOIN `' . _DB_PREFIX_ . 'category_lang` cl ON (c.`id_category` = cl.`id_category`)
                WHERE cp.`id_product` = ' . (int) $this->id . '
                AND cl.`id_lang` = ' . (int) $this->id_lang;
        
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Add to categories
     */
    public function addToCategories($categories = [])
    {
        if (empty($categories)) {
            return false;
        }
        
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'category_product` (`id_product`, `id_category`) VALUES ';
        $values = [];
        
        foreach ($categories as $id_category) {
            $values[] = '(' . (int) $this->id . ', ' . (int) $id_category . ')';
        }
        
        $sql .= implode(', ', $values);
        
        return Db::getInstance()->execute($sql);
    }

    /**
     * Update categories
     */
    public function updateCategories($categories, $keeping_current_pos = false)
    {
        if (!$keeping_current_pos) {
            $this->deleteCategories();
        }
        
        return $this->addToCategories($categories);
    }

    /**
     * Delete categories
     */
    public function deleteCategories($clean_positions = false)
    {
        $sql = 'DELETE FROM `' . _DB_PREFIX_ . 'category_product` WHERE `id_product` = ' . (int) $this->id;
        return Db::getInstance()->execute($sql);
    }

    /**
     * Get features
     */
    public function getFeatures()
    {
        $sql = 'SELECT f.*, fl.*, fp.`id_feature_value`
                FROM `' . _DB_PREFIX_ . 'feature_product` fp
                LEFT JOIN `' . _DB_PREFIX_ . 'feature` f ON (fp.`id_feature` = f.`id_feature`)
                LEFT JOIN `' . _DB_PREFIX_ . 'feature_lang` fl ON (f.`id_feature` = fl.`id_feature`)
                WHERE fp.`id_product` = ' . (int) $this->id . '
                AND fl.`id_lang` = ' . (int) $this->id_lang;
        
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Add features to DB
     */
    public function addFeaturesToDB($id_feature, $id_value, $cust = 0)
    {
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'feature_product` (`id_feature`, `id_product`, `id_feature_value`) VALUES (' . (int) $id_feature . ', ' . (int) $this->id . ', ' . (int) $id_value . ')';
        return Db::getInstance()->execute($sql);
    }

    /**
     * Delete features
     */
    public function deleteFeatures()
    {
        $sql = 'DELETE FROM `' . _DB_PREFIX_ . 'feature_product` WHERE `id_product` = ' . (int) $this->id;
        return Db::getInstance()->execute($sql);
    }

    /**
     * Get accessories
     */
    public function getAccessories($id_lang, $active = true)
    {
        $sql = 'SELECT p.*, pl.*, m.`name` as manufacturer_name, s.`name` as supplier_name
                FROM `' . _DB_PREFIX_ . 'accessory` a
                LEFT JOIN `' . _DB_PREFIX_ . 'product` p ON (a.`id_product_2` = p.`id_product`)
                LEFT JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (p.`id_product` = pl.`id_product`)
                LEFT JOIN `' . _DB_PREFIX_ . 'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
                LEFT JOIN `' . _DB_PREFIX_ . 'supplier` s ON (s.`id_supplier` = p.`id_supplier`)
                WHERE a.`id_product_1` = ' . (int) $this->id . '
                AND pl.`id_lang` = ' . (int) $id_lang;
        
        if ($active) {
            $sql .= ' AND p.`active` = 1';
        }
        
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Add accessories
     */
    public function addAccessories($accessories)
    {
        foreach ($accessories as $id_product_2) {
            $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'accessory` (`id_product_1`, `id_product_2`) VALUES (' . (int) $this->id . ', ' . (int) $id_product_2 . ')';
            Db::getInstance()->execute($sql);
        }
    }

    /**
     * Delete accessories
     */
    public function deleteAccessories()
    {
        $sql = 'DELETE FROM `' . _DB_PREFIX_ . 'accessory` WHERE `id_product_1` = ' . (int) $this->id;
        return Db::getInstance()->execute($sql);
    }

    /**
     * Get tags
     */
    public function getTags($id_lang)
    {
        $sql = 'SELECT t.*, tl.*
                FROM `' . _DB_PREFIX_ . 'product_tag` pt
                LEFT JOIN `' . _DB_PREFIX_ . 'tag` t ON (pt.`id_tag` = t.`id_tag`)
                LEFT JOIN `' . _DB_PREFIX_ . 'tag_lang` tl ON (t.`id_tag` = tl.`id_tag`)
                WHERE pt.`id_product` = ' . (int) $this->id . '
                AND tl.`id_lang` = ' . (int) $id_lang;
        
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Add tags
     */
    public function addTags($tags)
    {
        foreach ($tags as $id_tag) {
            $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'product_tag` (`id_product`, `id_tag`) VALUES (' . (int) $this->id . ', ' . (int) $id_tag . ')';
            Db::getInstance()->execute($sql);
        }
    }

    /**
     * Delete tags
     */
    public function deleteTags()
    {
        $sql = 'DELETE FROM `' . _DB_PREFIX_ . 'product_tag` WHERE `id_product` = ' . (int) $this->id;
        return Db::getInstance()->execute($sql);
    }

    /**
     * Get attachments
     */
    public function getAttachments($id_lang)
    {
        $sql = 'SELECT a.*, al.*
                FROM `' . _DB_PREFIX_ . 'product_attachment` pa
                LEFT JOIN `' . _DB_PREFIX_ . 'attachment` a ON (pa.`id_attachment` = a.`id_attachment`)
                LEFT JOIN `' . _DB_PREFIX_ . 'attachment_lang` al ON (a.`id_attachment` = al.`id_attachment`)
                WHERE pa.`id_product` = ' . (int) $this->id . '
                AND al.`id_lang` = ' . (int) $id_lang;
        
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Add attachments
     */
    public function addAttachments($attachments)
    {
        foreach ($attachments as $id_attachment) {
            $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'product_attachment` (`id_product`, `id_attachment`) VALUES (' . (int) $this->id . ', ' . (int) $id_attachment . ')';
            Db::getInstance()->execute($sql);
        }
    }

    /**
     * Delete attachments
     */
    public function deleteAttachments($update_attachment_cache = true)
    {
        $sql = 'DELETE FROM `' . _DB_PREFIX_ . 'product_attachment` WHERE `id_product` = ' . (int) $this->id;
        return Db::getInstance()->execute($sql);
    }

    /**
     * Get customization fields
     */
    public function getCustomizationFields($id_lang = false, $id_shop = null)
    {
        $sql = 'SELECT cf.*, cfl.*
                FROM `' . _DB_PREFIX_ . 'customization_field` cf
                LEFT JOIN `' . _DB_PREFIX_ . 'customization_field_lang` cfl ON (cf.`id_customization_field` = cfl.`id_customization_field`)
                WHERE cf.`id_product` = ' . (int) $this->id;
        
        if ($id_lang) {
            $sql .= ' AND cfl.`id_lang` = ' . (int) $id_lang;
        }
        
        $sql .= ' ORDER BY cf.`position`';
        
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Create labels
     */
    public function createLabels($uploadable_files, $text_fields)
    {
        $languages = Language::getLanguages();
        
        foreach ($languages as $language) {
            $this->_createLabel($language['id_lang'], $uploadable_files, $text_fields);
        }
    }

    /**
     * Create label
     */
    protected function _createLabel($id_lang, $uploadable_files, $text_fields)
    {
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'customization_field_lang` (`id_customization_field`, `id_lang`, `name`) VALUES ';
        $values = [];
        
        for ($i = 1; $i <= $uploadable_files; $i++) {
            $values[] = '(' . (int) $this->id . ', ' . (int) $id_lang . ', "Uploadable file ' . $i . '")';
        }
        
        for ($i = 1; $i <= $text_fields; $i++) {
            $values[] = '(' . (int) $this->id . ', ' . (int) $id_lang . ', "Text field ' . $i . '")';
        }
        
        $sql .= implode(', ', $values);
        
        return Db::getInstance()->execute($sql);
    }

    /**
     * Delete customization
     */
    public function deleteCustomization()
    {
        $sql = 'DELETE FROM `' . _DB_PREFIX_ . 'customization_field` WHERE `id_product` = ' . (int) $this->id;
        return Db::getInstance()->execute($sql);
    }

    /**
     * Get link
     */
    public function getLink($context = null)
    {
        if (!$context) {
            $context = Context::getContext();
        }
        
        return $context->link->getProductLink($this);
    }

    /**
     * Search by name
     */
    public static function searchByName($id_lang, $query, $context = null, $limit = null)
    {
        $sql = 'SELECT p.*, pl.*
                FROM `' . _DB_PREFIX_ . 'product` p
                LEFT JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (p.`id_product` = pl.`id_product`)
                WHERE pl.`id_lang` = ' . (int) $id_lang . '
                AND p.`active` = 1
                AND (pl.`name` LIKE "%' . pSQL($query) . '%" OR pl.`description` LIKE "%' . pSQL($query) . '%")';
        
        if ($limit) {
            $sql .= ' LIMIT ' . (int) $limit;
        }
        
        $results = Db::getInstance()->executeS($sql);
        $products = [];
        
        foreach ($results as $result) {
            $product = new Product();
            $product->hydrate($result);
            $products[] = $product;
        }
        
        return $products;
    }

    /**
     * Duplicate object
     */
    public function duplicateObject()
    {
        $old_id = $this->id;
        $this->id = null;
        $this->id_product = null;
        
        $this->add();
        
        $new_id = $this->id;
        
        // Duplicate categories
        $this->duplicateCategories($old_id, $new_id);
        
        // Duplicate features
        $this->duplicateFeatures($old_id, $new_id);
        
        // Duplicate accessories
        $this->duplicateAccessories($old_id, $new_id);
        
        // Duplicate tags
        $this->duplicateTags($old_id, $new_id);
        
        // Duplicate attachments
        $this->duplicateAttachments($old_id, $new_id);
        
        return $this;
    }

    /**
     * Duplicate categories
     */
    public static function duplicateCategories($id_product_old, $id_product_new)
    {
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'category_product` (`id_product`, `id_category`)
                SELECT ' . (int) $id_product_new . ', `id_category`
                FROM `' . _DB_PREFIX_ . 'category_product`
                WHERE `id_product` = ' . (int) $id_product_old;
        
        return Db::getInstance()->execute($sql);
    }

    /**
     * Duplicate features
     */
    public static function duplicateFeatures($id_product_old, $id_product_new)
    {
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'feature_product` (`id_feature`, `id_product`, `id_feature_value`)
                SELECT `id_feature`, ' . (int) $id_product_new . ', `id_feature_value`
                FROM `' . _DB_PREFIX_ . 'feature_product`
                WHERE `id_product` = ' . (int) $id_product_old;
        
        return Db::getInstance()->execute($sql);
    }

    /**
     * Duplicate accessories
     */
    public static function duplicateAccessories($id_product_old, $id_product_new)
    {
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'accessory` (`id_product_1`, `id_product_2`)
                SELECT ' . (int) $id_product_new . ', `id_product_2`
                FROM `' . _DB_PREFIX_ . 'accessory`
                WHERE `id_product_1` = ' . (int) $id_product_old;
        
        return Db::getInstance()->execute($sql);
    }

    /**
     * Duplicate tags
     */
    public static function duplicateTags($id_product_old, $id_product_new)
    {
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'product_tag` (`id_product`, `id_tag`)
                SELECT ' . (int) $id_product_new . ', `id_tag`
                FROM `' . _DB_PREFIX_ . 'product_tag`
                WHERE `id_product` = ' . (int) $id_product_old;
        
        return Db::getInstance()->execute($sql);
    }

    /**
     * Duplicate attachments
     */
    public static function duplicateAttachments($id_product_old, $id_product_new)
    {
        $sql = 'INSERT INTO `' . _DB_PREFIX_ . 'product_attachment` (`id_product`, `id_attachment`)
                SELECT ' . (int) $id_product_new . ', `id_attachment`
                FROM `' . _DB_PREFIX_ . 'product_attachment`
                WHERE `id_product` = ' . (int) $id_product_old;
        
        return Db::getInstance()->execute($sql);
    }

    /**
     * Get tax rate
     */
    public function getTaxesRate($address = null)
    {
        if (!$address) {
            $address = new Address();
        }
        
        $tax_manager = TaxManagerFactory::getManager($address, Product::getIdTaxRulesGroupByIdProduct($this->id));
        $tax_calculator = $tax_manager->getTaxCalculator();
        
        return $tax_calculator->getTotalRate();
    }

    /**
     * Get ID by reference
     */
    public static function getIdByReference($reference)
    {
        $sql = 'SELECT `id_product` FROM `' . _DB_PREFIX_ . 'product` WHERE `reference` = "' . pSQL($reference) . '"';
        $result = Db::getInstance()->getRow($sql);
        
        return $result ? (int) $result['id_product'] : false;
    }

    /**
     * Get ID by EAN13
     */
    public static function getIdByEan13($ean13)
    {
        $sql = 'SELECT `id_product` FROM `' . _DB_PREFIX_ . 'product` WHERE `ean13` = "' . pSQL($ean13) . '"';
        $result = Db::getInstance()->getRow($sql);
        
        return $result ? (int) $result['id_product'] : false;
    }

    /**
     * Get ID by UPC
     */
    public static function getIdByUpc($upc)
    {
        $sql = 'SELECT `id_product` FROM `' . _DB_PREFIX_ . 'product` WHERE `upc` = "' . pSQL($upc) . '"';
        $result = Db::getInstance()->getRow($sql);
        
        return $result ? (int) $result['id_product'] : false;
    }

    /**
     * Check if product is new
     */
    public function isNew()
    {
        $sql = 'SELECT COUNT(*) as total FROM `' . _DB_PREFIX_ . 'product` WHERE `date_add` > DATE_SUB(NOW(), INTERVAL ' . (int) Configuration::get('PS_NB_DAYS_NEW_PRODUCT') . ' DAY) AND `id_product` = ' . (int) $this->id;
        $result = Db::getInstance()->getRow($sql);
        
        return (int) $result['total'] > 0;
    }

    /**
     * Check if product is on sale
     */
    public function isOnSale()
    {
        return (bool) $this->on_sale;
    }

    /**
     * Check if product is available for order
     */
    public function isAvailableForOrder()
    {
        return (bool) $this->available_for_order;
    }

    /**
     * Check if product is virtual
     */
    public function isVirtual()
    {
        return (bool) $this->is_virtual;
    }

    /**
     * Get product type
     */
    public function getProductType()
    {
        if ($this->is_virtual) {
            return 'virtual';
        }
        
        if ($this->cache_is_pack) {
            return 'pack';
        }
        
        return 'standard';
    }
}