<?php
class ProductSale extends ProductSaleCore
{
	public static function getBestSalesVp($id_lang, $pageNumber = 0, $nbProducts = 10, $orderBy=NULL, $orderWay=NULL, $filterPrice=NULL)
	{
		$id_category_vp = self::_getIdCategoryPrivateSales();
		// $id_category_vp = array_unique($id_category_vp);

		if ($pageNumber < 0) $pageNumber = 0;
		if ($nbProducts < 1) $nbProducts = 10;
		if (empty($orderBy) || $orderBy == 'position') $orderBy = 'sales';
		if (empty($orderWay)) $orderWay = 'DESC';

		$groups = FrontController::getCurrentCustomerGroups();
		$sqlGroups = (count($groups) ? 'IN ('.implode(',', $groups).')' : '= 1');

		$result = array();
		foreach ($id_category_vp as $key => $sale) {
			$categories = array($sale['id_category']);

			$children = Category::getChildren($sale['id_category'] , 1);
			if(count($children) > 0){
				foreach ($children as $key => $child) {
					$categories[] = $child['id_category'];
				}
			}

			$sale_product = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
				SELECT
					DISTINCT(p.id_product), p.`out_of_stock`, p.`id_category_default`, p.`ean13`,
					pl.`description`, pl.`description_short`, pl.`link_rewrite`, pl.`meta_description`, pl.`meta_keywords`, pl.`meta_title`, pl.`name`, m.`name` AS manufacturer_name, p.`id_manufacturer` as id_manufacturer,
					i.`id_image`, il.`legend`,
					ps.`quantity` AS sales, t.`rate`, pl.`meta_keywords`, pl.`meta_title`, pl.`meta_description`,
					DATEDIFF(p.`date_add`, DATE_SUB(NOW(), INTERVAL '.(Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY)) > 0 AS new
				FROM `'._DB_PREFIX_.'product` p
				LEFT JOIN `'._DB_PREFIX_.'product_lang` pl ON (p.`id_product` = pl.`id_product` AND pl.`id_lang` = '.(int)($id_lang).')
				LEFT JOIN `'._DB_PREFIX_.'image` i ON (i.`id_product` = p.`id_product` AND i.`cover` = 1)
				LEFT JOIN `'._DB_PREFIX_.'image_lang` il ON (i.`id_image` = il.`id_image` AND il.`id_lang` = '.(int)($id_lang).')
				LEFT JOIN `'._DB_PREFIX_.'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
				LEFT JOIN `'._DB_PREFIX_.'tax_rule` tr ON (p.`id_tax_rules_group` = tr.`id_tax_rules_group`
				                                           AND tr.`id_country` = '.(int)Country::getDefaultCountryId().'
			                                           	   AND tr.`id_state` = 0)
			    LEFT JOIN `'._DB_PREFIX_.'tax` t ON (t.`id_tax` = tr.`id_tax`)
			    LEFT JOIN `'._DB_PREFIX_.'category_product` cp ON (cp.`id_product` = p.`id_product`)
			    LEFT JOIN `'._DB_PREFIX_.'product_sale` ps ON (ps.`id_product` = p.`id_product`)
				WHERE p.`active` = 1
				AND p.`quantity` > 0
				AND p.id_product  = (
						SELECT ps.id_product
						FROM `'._DB_PREFIX_.'product_sale` ps
						INNER JOIN  `'._DB_PREFIX_.'category_product` cp ON ( cp.id_product = ps.id_product )
						WHERE cp.id_category IN ('. implode(',', $categories).')
						ORDER BY ps.quantity DESC
						LIMIT 1
					)
				');


			if (!$sale_product)
				continue;

			$data = Product::getProductsProperties($id_lang, $sale_product, false);
			if (isset($filterPrice) && is_int($filterPrice) && $data[0]['price']<$filterPrice) {
				continue;
			}
			$result[] = $data[0];
			unset($categories);
		}
		$final_array = self::bubble_sort($result);
		$final_array = array_reverse($final_array);

		return array_slice($final_array,0,$nbProducts);
	}

	public static function bubble_sort($array)
	{
	    $i = count($array);
	    if ($i <= 0) return false;
	    $ok = false;
	    do
	    {
	        $ok = false;
	        for($j=$i-1; $j!=0; $j--)
	        {
	            if ($array[$j]['sales'] < $array[$j-1]['sales'])
	            {
	            	$tmp = $array[$j];
	            	$array[$j] = $array[$j-1];
	            	$array[$j-1] = $tmp;
	            	$ok = true;
	            }
	        }
	    }
	    while($ok);
	    return $array;
	}

	private static function _getIdCategoryPrivateSales()
	{
		global $site_version_front;
		$sale_exception = Configuration::get('ANT_BESTSALE_EXCEPTION');
		$query = '
			SELECT p.`id_category`
			FROM `'._DB_PREFIX_.'privatesale` p
			LEFT JOIN `'._DB_PREFIX_.'privatesale_site_version` v ON v.`id_sale` = p.`id_sale`
			WHERE p.`date_start` <= NOW()
			AND p.`date_end` >= NOW()
			AND v.`version` = "'.pSql($site_version_front).'"
			'.((!empty($sale_exception) && $sale_exception!='')?'AND p.`id_sale` NOT IN ('.$sale_exception.')':'').'
		';
		return $sales = Db::getInstance()->ExecuteS($query);
	}


	public static function getSaleFamily(
		$id_sale,
		$id_lang
		)
	{
		$query = '
			SELECT DISTINCT a.`id_category_family`, c.`name`
		 	FROM `'._DB_PREFIX_.'category_family_association` a
		 	JOIN `'._DB_PREFIX_.'category_family_lang` c ON c.`id_category_family` = a.`id_category_family`
		 	JOIN `'._DB_PREFIX_.'privatesale_category` b ON b.`id_category` = a.`id_category`
		 	WHERE b.`id_sale` = '.pSql($id_sale).'
		 	AND c.`id_lang` = '.pSql($id_lang);
		 return Db::getInstance()->getRow($query);
	}

	public static function getCategoryFamily($id_category, $id_sale, $id_lang)
	{
		$result = Db::getInstance()->getRow('
			SELECT DISTINCT a.`id_category_family`, c.`name`
			FROM `'._DB_PREFIX_.'category_family_association` a
			JOIN `'._DB_PREFIX_.'category_family_lang` c ON c.`id_category_family` = a.`id_category_family`
			WHERE a.`id_category` = '.(int)$id_category.'
			AND c.`id_lang` = '.(int)$id_lang
		);
		if($result) {
			return $result;
		} else {
			$query = '
				SELECT DISTINCT a.`id_category_family`, c.`name`
				FROM `'._DB_PREFIX_.'category_family_association` a
				JOIN `'._DB_PREFIX_.'category_family_lang` c ON c.`id_category_family` = a.`id_category_family`
				JOIN `'._DB_PREFIX_.'privatesale_category` b ON b.`id_category` = a.`id_category`
				WHERE b.`id_sale` = '.(int)$id_sale.'
				AND c.`id_lang` = '.(int)$id_lang;
			return Db::getInstance()->getRow($query);
		}
	}


	public static function getFamilyBestSales($id_category_family, $id_lang, $nb_products_max = 3, $filter_price=0, $exclude_id_product)
	{
		if ($nb_products_max < 1) {
			$nb_products_max = 3;
		}

		$categories = self::_getPrivateSalesCategoriesOfFamily($id_category_family);
		if (empty($categories)) {
			return [];
		}

		$query = '
			SELECT
				DISTINCT(p.`id_product`), p.`out_of_stock`, p.`id_category_default`, p.`ean13`,

				pl.`description`, pl.`description_short`, pl.`link_rewrite`, pl.`meta_description`, pl.`meta_keywords`, pl.`meta_title`, pl.`name`,
				m.`name` AS manufacturer_name,
				p.`id_manufacturer` AS id_manufacturer,
				i.`id_image`, il.`legend`,
				ps.`quantity` AS sales,
				t.`rate`,
				pl.`meta_keywords`, pl.`meta_title`, pl.`meta_description`,
				DATEDIFF(p.`date_add`, DATE_SUB(NOW(), INTERVAL '.(Validate::isUnsignedInt(Configuration::get('PS_NB_DAYS_NEW_PRODUCT')) ? Configuration::get('PS_NB_DAYS_NEW_PRODUCT') : 20).' DAY)) > 0 AS new
			FROM `'._DB_PREFIX_.'product` p
		    LEFT JOIN `'._DB_PREFIX_.'product_sale` ps ON (ps.`id_product` = p.`id_product`)
		    LEFT JOIN `'._DB_PREFIX_.'category_product` cp ON (cp.`id_product` = p.`id_product`)
		   	LEFT JOIN `'._DB_PREFIX_.'category_family_association` cfa ON cfa.id_category = cp.id_category
			LEFT JOIN `'._DB_PREFIX_.'product_lang` pl ON (p.`id_product` = pl.`id_product` AND pl.`id_lang` = '.(int)($id_lang).')
			LEFT JOIN `'._DB_PREFIX_.'image` i ON (i.`id_product` = p.`id_product` AND i.`cover` = 1)
			LEFT JOIN `'._DB_PREFIX_.'image_lang` il ON (i.`id_image` = il.`id_image` AND il.`id_lang` = '.(int)($id_lang).')
			LEFT JOIN `'._DB_PREFIX_.'manufacturer` m ON (m.`id_manufacturer` = p.`id_manufacturer`)
			LEFT JOIN `'._DB_PREFIX_.'tax_rule` tr ON (p.`id_tax_rules_group` = tr.`id_tax_rules_group`
			                                           AND tr.`id_country` = '.(int)Country::getDefaultCountryId().'
		                                           	   AND tr.`id_state` = 0)
		    LEFT JOIN `'._DB_PREFIX_.'tax` t ON (t.`id_tax` = tr.`id_tax`)
			WHERE p.`active` = 1
			AND p.`quantity` > 0
			AND cp.`id_category` IN ('. pSql(implode(',', array_column($categories, 'id_category'))).')
			AND cfa.`id_category_family` = '.(int)$id_category_family.'
			AND p.`id_product` <> '.(int)$exclude_id_product.'
			ORDER BY sales DESC
			';
		$best_sale_products = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS($query);

		if (empty($best_sale_products)) {
			return [];
		}

		$filtered_best_sale_products = array();

		foreach ($best_sale_products as $product) {
			$properties = Product::getProductProperties($id_lang, $product, false);
			if (isset($filter_price) && is_int($filter_price) && $properties['price']<$filter_price) {
				continue;
			}
			if ($nb_products_max==0) {
				break;
			}
			$filtered_best_sale_products[] = $properties;
			$nb_products_max--;
		}
		return $filtered_best_sale_products;
	}

	/**
	 * display all categories (parents/children) having opened private sales the current version (lang)
	 * and for the given family
	 */
	private static function _getPrivateSalesCategoriesOfFamily($id_category_family)
	{
		global $site_version_front;

		$query = '
			SELECT `sale_cat`.`id_category`
			FROM `'._DB_PREFIX_.'privatesale_category` `sale_cat`
			JOIN `'._DB_PREFIX_.'privatesale` `sale` ON `sale`.`id_sale` = `sale_cat`.`id_sale`
			JOIN `'._DB_PREFIX_.'privatesale_site_version` `vers` ON `vers`.`id_sale` = `sale`.`id_sale`
			JOIN `'._DB_PREFIX_.'category_family_association` `cat_fam` ON `cat_fam`.`id_category` = `sale_cat`.`id_category`
			WHERE `cat_fam`.`id_category_family` = '.$id_category_family.'
			AND `sale`.`date_start` <= NOW()
			AND `sale`.`date_end` >= NOW()
			AND `vers`.`version` = "'.pSql($site_version_front).'"
			';
		return Db::getInstance()->ExecuteS($query);
	}

}