<?php
/*
* 2007-2014 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2014 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

/**
 * Holds Stock
 *
 * @since 1.5.0
 */
class WarehouseCore extends ObjectModel
{
	/** @var int identifier of the warehouse */
	public $id;

	/** @var int Id of the address associated to the warehouse */
	public $id_address;

	/** @var string Reference of the warehouse */
	public $reference;

	/** @var string Name of the warehouse */
	public $name;

	/** @var int Id of the employee who manages the warehouse */
	public $id_employee;

	/** @var int Id of the valuation currency of the warehouse */
	public $id_currency;

	/** @var bool True if warehouse has been deleted (hence, no deletion in DB) */
	public $deleted = 0;

	/**
	 * Describes the way a Warehouse is managed
	 * @var enum WA|LIFO|FIFO
	 */
	public $management_type;

	/**
	 * @see ObjectModel::$definition
	 */
	public static $definition = array(
		'table' => 'warehouse',
		'primary' => 'id_warehouse',
		'fields' => array(
			'id_address' => 		array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'reference' => 			array('type' => self::TYPE_STRING, 'validate' => 'isString', 'required' => true, 'size' => 45),
			'name' => 				array('type' => self::TYPE_STRING, 'validate' => 'isString', 'required' => true, 'size' => 45),
			'id_employee' => 		array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'management_type' => 	array('type' => self::TYPE_STRING, 'validate' => 'isStockManagement', 'required' => true),
			'id_currency' => 		array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'deleted' => 			array('type' => self::TYPE_BOOL),
		),
	);

	/**
	 * @see ObjectModel::$webserviceParameters
	 */
 	protected $webserviceParameters = array(
 		'fields' => array(
 			'id_address' => array('xlink_resource' => 'addresses'),
 			'id_employee' => array('xlink_resource' => 'employees'),
 			'id_currency' => array('xlink_resource' => 'currencies'),
 			'valuation' => array('getter' => 'getWsStockValue', 'setter' => false),
 			'deleted' => array(),
 		),
 		'associations' => array(
			'stocks' => array(
				'resource' => 'stocks',
				'fields' => array(
					'id' => array(),
				),
			),
			'carriers' => array(
				'resource' => 'carriers',
				'fields' => array(
					'id' => array(),
				),
			),
			'shops' => array(
				'resource' => 'shops',
				'fields' => array(
					'id' => array(),
					'name' => array(),
				),
			),
		),
 	);

	/**
	 * Gets the shops associated to the current warehouse
	 *
	 * @return array Shops (id, name)
	 */
	public function getShops()
	{
		$query = new DbQuery();
		$query->select('ws.id_shop, s.name');
		$query->from('warehouse_shop', 'ws');
		$query->leftJoin('shop', 's', 's.id_shop = ws.id_shop');
		$query->where($this->def['primary'].' = '.(int)$this->id);

		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
		return $res;
	}

	/**
	 * Gets the carriers associated to the current warehouse
	 *
	 * @return array Ids of the associated carriers
	 */
	public function getCarriers($return_reference = false)
	{
		$ids_carrier = array();

		$query = new DbQuery();
		if ($return_reference)
			$query->select('wc.id_carrier');
		else
			$query->select('c.id_carrier');
		$query->from('warehouse_carrier', 'wc');
		$query->innerJoin('carrier', 'c', 'c.id_reference = wc.id_carrier');
		$query->where($this->def['primary'].' = '.(int)$this->id);
		$query->where('c.deleted = 0');
		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);

		if (!is_array($res))
			return $ids_carrier;

		foreach ($res as $carriers)
			foreach ($carriers as $carrier)
				$ids_carrier[] = $carrier;

		return $ids_carrier;
	}

	/**
	 * Sets the carriers associated to the current warehouse
	 *
	 * @param array $ids_carriers
	 */
	public function setCarriers($ids_carriers)
	{
		if (!is_array($ids_carriers))
			$ids_carriers = array();

		$row_to_insert = array();
		foreach ($ids_carriers as $id_carrier)
			$row_to_insert[] = array($this->def['primary'] => $this->id, 'id_carrier' => (int)$id_carrier);

		Db::getInstance()->execute('
			DELETE FROM '._DB_PREFIX_.'warehouse_carrier
			WHERE '.$this->def['primary'].' = '.(int)$this->id);

		if ($row_to_insert)
			Db::getInstance()->insert('warehouse_carrier', $row_to_insert);
	}

	/**
	 * For a given carrier, removes it from the warehouse/carrier association
	 * If $id_warehouse is set, it only removes the carrier for this warehouse
	 *
	 * @param int $id_carrier Id of the carrier to remove
	 * @param int $id_warehouse optional Id of the warehouse to filter
	 */
	public static function removeCarrier($id_carrier, $id_warehouse = null)
	{
		Db::getInstance()->execute('
			DELETE FROM '._DB_PREFIX_.'warehouse_carrier
			WHERE id_carrier = '.(int)$id_carrier.
			($id_warehouse ? ' AND id_warehouse = '.(int)$id_warehouse : ''));
	}

	/**
	 * Checks if a warehouse is empty - i.e. has no stock
	 *
	 * @return bool
	 */
	public function isEmpty()
	{
		$query = new DbQuery();
		$query->select('SUM(s.physical_quantity)');
		$query->from('stock', 's');
		$query->where($this->def['primary'].' = '.(int)$this->id);
		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query) == 0);
	}

	/**
	 * Checks if the given warehouse exists
	 *
	 * @param int $id_warehouse
	 * @return bool Exists/Does not exist
	 */
	public static function exists($id_warehouse)
	{
		$query = new DbQuery();
		$query->select('id_warehouse');
		$query->from('warehouse');
		$query->where('id_warehouse = '.(int)$id_warehouse);
		$query->where('deleted = 0');
		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query));
	}

	/**
	 * For a given {product, product attribute} sets its location in the given warehouse
	 * First, for the given parameters, it cleans the database before updating
	 *
	 * @param int $id_product ID of the product
	 * @param int $id_product_attribute Use 0 if this product does not have attributes
	 * @param int $id_warehouse ID of the warehouse
	 * @param string $location Describes the location (no lang id required)
	 * @return bool Success/Failure
	 */
	public static function setProductLocation($id_product, $id_product_attribute, $id_warehouse, $location)
	{
		Db::getInstance()->execute('
			DELETE FROM `'._DB_PREFIX_.'warehouse_product_location`
			WHERE `id_product` = '.(int)$id_product.'
			AND `id_product_attribute` = '.(int)$id_product_attribute.'
			AND `id_warehouse` = '.(int)$id_warehouse);

		$row_to_insert = array(
			'id_product' => (int)$id_product,
			'id_product_attribute' => (int)$id_product_attribute,
			'id_warehouse' => (int)$id_warehouse,
			'location' => pSQL($location),
		);

		return Db::getInstance()->insert('warehouse_product_location', $row_to_insert);
	}

	/**
	 * Resets all product locations for this warehouse
	 */
	public function resetProductsLocations()
	{
		Db::getInstance()->execute('
			DELETE FROM `'._DB_PREFIX_.'warehouse_product_location`
			WHERE `id_warehouse` = '.(int)$this->id);
	}

	/**
	 * For a given {product, product attribute} gets its location in the given warehouse
	 *
	 * @param int $id_product ID of the product
	 * @param int $id_product_attribute Use 0 if this product does not have attributes
	 * @param int $id_warehouse ID of the warehouse
	 * @return string Location of the product
	 */
	public static function getProductLocation($id_product, $id_product_attribute, $id_warehouse)
	{
		$query = new DbQuery();
		$query->select('location');
		$query->from('warehouse_product_location');
		$query->where('id_warehouse = '.(int)$id_warehouse);
		$query->where('id_product = '.(int)$id_product);
		$query->where('id_product_attribute = '.(int)$id_product_attribute);

		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query));
	}

	/**
	 * For a given {product, product attribute} gets warehouse list
	 *
	 * @param int $id_product ID of the product
	 * @param int $id_product_attribute Optional, uses 0 if this product does not have attributes
	 * @param int $id_shop Optional, ID of the shop. Uses the context shop id (@see Context::shop)
	 * @return array Warehouses (ID, reference/name concatenated)
	 */
	public static function getProductWarehouseList($id_product, $id_product_attribute = 0, $id_shop = null)
	{

		// if it's a pack, returns warehouses if and only if some products use the advanced stock management
		if (Pack::isPack($id_product))
		{
			$warehouses = Warehouse::getPackWarehouses($id_product);
			$res = array();
			foreach ($warehouses as $warehouse)
				$res[]['id_warehouse'] = $warehouse;
			return $res;
		}
		$share_stock = false;
		if ($id_shop === null)
		{
			if (Shop::getContext() == Shop::CONTEXT_GROUP)
				$shop_group = Shop::getContextShopGroup();
			else
			{
				$shop_group = Context::getContext()->shop->getGroup();
				$id_shop = (int)Context::getContext()->shop->id;
			}	
			$share_stock = $shop_group->share_stock;
		}
		else
		{
			$shop_group = Shop::getGroupFromShop($id_shop);
			$share_stock = $shop_group['share_stock'];
		}

		if ($share_stock)
			$ids_shop = Shop::getShops(true, (int)$shop_group->id, true);
		else
			$ids_shop = array((int)$id_shop);

		$query = new DbQuery();
		$query->select('wpl.id_warehouse, CONCAT(w.reference, " - ", w.name) as name');
		$query->from('warehouse_product_location', 'wpl');
		$query->innerJoin('warehouse_shop', 'ws', 'ws.id_warehouse = wpl.id_warehouse AND id_shop IN ('.implode(',', array_map('intval', $ids_shop)).')');
		$query->innerJoin('warehouse', 'w', 'ws.id_warehouse = w.id_warehouse');
		$query->where('id_product = '.(int)$id_product);
		$query->where('id_product_attribute = '.(int)$id_product_attribute);
		$query->where('w.deleted = 0');
		$query->groupBy('wpl.id_warehouse');

		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query));
	}

	/**
	 * Gets available warehouses
	 * It is possible via ignore_shop and id_shop to filter the list with shop id
	 *
	 * @param bool $ignore_shop Optional, false by default - Allows to get only the warehouses that are associated to one/some shops (@see $id_shop)
	 * @param int $id_shop Optional, Context::shop::Id by default - Allows to define a specific shop to filter.
	 * @return array Warehouses (ID, reference/name concatenated)
	 */
	public static function getWarehouses($ignore_shop = false, $id_shop = null)
	{
		if (!$ignore_shop)
			if (is_null($id_shop))
				$id_shop = Context::getContext()->shop->id;

		$query = new DbQuery();
		$query->select('w.id_warehouse, CONCAT(reference, \' - \', name) as name');
		$query->from('warehouse', 'w');
		$query->where('deleted = 0');
		$query->orderBy('reference ASC');
		if (!$ignore_shop)
			$query->innerJoin('warehouse_shop', 'ws', 'ws.id_warehouse = w.id_warehouse AND ws.id_shop = '.(int)$id_shop);

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
	}

	/**
	 * Gets warehouses grouped by shops
	 *
	 * @return array (of array) Warehouses ID are grouped by shops ID
	 */
	public static function getWarehousesGroupedByShops()
	{
		$ids_warehouse = array();
		$query = new DbQuery();
		$query->select('id_warehouse, id_shop');
		$query->from('warehouse_shop');
		$query->orderBy('id_shop');

		// queries to get warehouse ids grouped by shops
		foreach (Db::getInstance()->executeS($query) as $row)
			$ids_warehouse[$row['id_shop']][] = $row['id_warehouse'];

		return $ids_warehouse;
	}

	/**
	 * Gets the number of products in the current warehouse
	 *
	 * @return int Number of different id_stock
	 */
	public function getNumberOfProducts()
	{
		$query = '
			SELECT COUNT(t.id_stock)
			FROM
				(
					SELECT s.id_stock
				 	FROM '._DB_PREFIX_.'stock s
				 	WHERE s.id_warehouse = '.(int)$this->id.'
				 	GROUP BY s.id_product, s.id_product_attribute
				 ) as t';

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);
	}

	/**
	 * Gets the number of quantities - for all products - in the current warehouse
	 *
	 * @return int Total Quantity
	 */
	public function getQuantitiesOfProducts()
	{
		$query = '
			SELECT SUM(s.physical_quantity)
			FROM '._DB_PREFIX_.'stock s
			WHERE s.id_warehouse = '.(int)$this->id;

		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);

		return ($res ? $res : 0);
	}

	/**
	 * Gets the value of the stock in the current warehouse
	 *
	 * @return int Value of the stock
	 */
	public function getStockValue()
	{
		$query = new DbQuery();
		$query->select('SUM(s.`price_te` * s.`physical_quantity`)');
		$query->from('stock', 's');
		$query->where('s.`id_warehouse` = '.(int)$this->id);

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);
	}

	/**
	 * For a given employee, gets the warehouse(s) he/she manages
	 *
	 * @param int $id_employee Manager ID
	 * @return array ids_warehouse Ids of the warehouses
	 */
	public static function getWarehousesByEmployee($id_employee)
	{
		$query = new DbQuery();
		$query->select('w.id_warehouse');
		$query->from('warehouse', 'w');
		$query->where('w.id_employee = '.(int)$id_employee);

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
	}

	/**
	 * For a given product, returns the warehouses it is stored in
	 *
	 * @param int $id_product Product Id
	 * @param int $id_product_attribute Optional, Product Attribute Id - 0 by default (no attribues)
	 * @return array Warehouses Ids and names
	 */
	public static function getWarehousesByProductId($id_product, $id_product_attribute = 0)
	{
		if (!$id_product && !$id_product_attribute)
			return array();

		$query = new DbQuery();
		$query->select('DISTINCT w.id_warehouse, CONCAT(w.reference, " - ", w.name) as name');
		$query->from('warehouse', 'w');
		$query->leftJoin('stock', 's', 's.id_warehouse = w.id_warehouse');
		if ($id_product)
			$query->where('s.id_product = '.(int)$id_product);
		if ($id_product_attribute)
			$query->where('s.id_product_attribute = '.(int)$id_product_attribute);
		$query->orderBy('w.reference ASC');

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
	}

	/**
	 * For a given $id_warehouse, returns its name
	 *
	 * @param int $id_warehouse Warehouse Id
	 * @return string Name
	 */
	public static function getWarehouseNameById($id_warehouse)
	{
		$query = new DbQuery();
		$query->select('name');
		$query->from('warehouse');
		$query->where('id_warehouse = '.(int)$id_warehouse);
		return Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);
	}

	/**
	 * For a given pack, returns the warehouse it can be shipped from
	 *
	 * @param int $id_product
	 * @return array|bool id_warehouse or false
	 */
	public static function getPackWarehouses($id_product, $id_shop = null)
	{
		if (!Pack::isPack($id_product))
			return false;

		if (is_null($id_shop))
			$id_shop = Context::getContext()->shop->id;

		// warehouses of the pack
		$pack_warehouses = WarehouseProductLocation::getCollection((int)$id_product);
		// products in the pack
		$products = Pack::getItems((int)$id_product, Configuration::get('PS_LANG_DEFAULT'));

		// array with all warehouses id to check
		$list = array();

		// fills $list
		foreach ($pack_warehouses as $pack_warehouse)
			$list['pack_warehouses'][] = (int)$pack_warehouse->id_warehouse;

		// for each products in the pack
		foreach ($products as $product)
		{
			if ($product->advanced_stock_management)
			{
				// gets the warehouses of one product
				$product_warehouses = Warehouse::getProductWarehouseList((int)$product->id, (int)$product->cache_default_attribute, (int)$id_shop);
				$list[(int)$product->id] = array();
				// fills array with warehouses for this product
				foreach ($product_warehouses as $product_warehouse)
					$list[(int)$product->id][] = $product_warehouse['id_warehouse'];
			}
		}

		$res = false;
		// returns final list
		if (count($list) > 1)
			$res = call_user_func_array('array_intersect', $list);
		return $res;
	}
	
	public function resetStockAvailable()
	{
		$products = WarehouseProductLocation::getProducts((int)$this->id);
		foreach ($products as $product)
			StockAvailable::synchronize((int)$product['id_product']);
	}

	/*********************************\
	 *
	 * Webservices Specific Methods
	 *
	 *********************************/

	/**
	 * Webservice : gets the value of the warehouse
	 * @return int
	 */
	public function getWsStockValue()
	{
		return $this->getStockValue();
	}

	/**
	 * Webservice : gets the ids stock associated to this warehouse
	 * @return array
	 */
	public function getWsStocks()
	{
		$query = new DbQuery();
		$query->select('s.id_stock as id');
		$query->from('stock', 's');
		$query->where('s.id_warehouse ='.(int)$this->id);

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
	}

	/**
	 * Webservice : gets the ids shops associated to this warehouse
	 * @return array
	 */
	public function getWsShops()
	{
		$query = new DbQuery();
		$query->select('ws.id_shop as id, s.name');
		$query->from('warehouse_shop', 'ws');
		$query->leftJoin('shop', 's', 's.id_shop = ws.id_shop');
		$query->where($this->def['primary'].' = '.(int)$this->id);

		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
		return $res;
	}

	/**
	 * Webservice : gets the ids carriers associated to this warehouse
	 * @return array
	 */
	public function getWsCarriers()
	{
		$ids_carrier = array();

		$query = new DbQuery();
		$query->select('wc.id_carrier as id');
		$query->from('warehouse_carrier', 'wc');
		$query->where($this->def['primary'].' = '.(int)$this->id);

		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);

		if (!is_array($res))
			return $ids_carrier;

		foreach ($res as $carriers)
			foreach ($carriers as $carrier)
				$ids_carrier[] = $carrier;

		return $ids_carrier;
	}

}