<?php

class Pack extends PackCore
{

    static $_cache_getSimplePack = NULL;

    /**
     * Get pack available quantity
     */
    public static function getAvailableQuantity($id_product, $id_lang)
    {
        $items = self::getItems((int) $id_product, $id_lang);
        $pack_quantity = Product::getQuantity($id_product, NULL, true);
        if (!$pack_quantity) {
            return 0;
        }
        foreach ($items AS $item){
            if (!$item->isAvailableWhenOutOfStock((int) $item->out_of_stock) AND (floor( (int) $item->quantity / (int) $item->pack_quantity) < $pack_quantity)) {
                $pack_quantity = floor( (int) $item->quantity / (int) $item->pack_quantity);
            }
        }
        return $pack_quantity;
    }

    /**
     * Get simple pack
     */
    public static function getSimplePack($id_product_pack){
        if (isset($_cache_getSimplePack[(int) $id_product_pack])) {
            return $_cache_getSimplePack[(int) $id_product_pack];
        }
        $_cache_getSimplePack[(int) $id_product_pack] = Db::getInstance()->executeS('
            SELECT *
            FROM `' . _DB_PREFIX_ . 'pack`
            WHERE `id_product_pack` = ' . (int) $id_product_pack . '
        ');
        return $_cache_getSimplePack[(int) $id_product_pack];
    }
    /**
     * Get complete simple pack
     */
    public static function getCompleteSimplePack($id_product_pack){
        if (isset($_cache_getSimplePack[(int) $id_product_pack])) {
            return $_cache_getSimplePack[(int) $id_product_pack];
        }
        $_cache_getSimplePack[(int) $id_product_pack] = Db::getInstance()->executeS('
            SELECT pp.`id_product_pack`, pp.`quantity` AS `pack_quantity`, p.*, pl.*
            FROM `'._DB_PREFIX_.'pack` pp
            LEFT JOIN `'._DB_PREFIX_.'product` p ON (pp.`id_product_item` = p.`id_product`)
            LEFT JOIN `'._DB_PREFIX_.'product_lang` pl
            ON (
                p.`id_product` = pl.`id_product`
                AND pl.`id_lang` = '.(int)(Configuration::get('PS_LANG_DEFAULT')).'
            )
            WHERE pp.`id_product_pack` = ' . (int) $id_product_pack . '
        ');
        return $_cache_getSimplePack[(int) $id_product_pack];
    }

    /**
     * Get item pack
     */
    public static function getPacks($id_product_item){
        return Db::getInstance()->executeS('
            SELECT `id_product_pack`, `quantity`
            FROM `' . _DB_PREFIX_ . 'pack`
            WHERE `id_product_item` = ' . (int) $id_product_item . '
        ');
    }

}