<?php
/*
* 2007-2011 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  2007-2011 PrestaShop SA
*  @version  Release: $Revision$
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

/**
 * @since 1.5.0
 */
class AdminStockCoverControllerCore extends AdminController
{
	private $stock_cover_warehouses;
	private $stock_cover_periods;

	public function __construct()
	{
		$this->context = Context::getContext();
		$this->table = 'product';
		$this->className = 'Product';
		$this->lang = true;

		$this->fieldsDisplay = array(
			'reference' => array(
				'title' => $this->l('Reference'),
				'align' => 'center',
				'width' => 200,
				'filter_key' => 'a!reference'
			),
			'ean13' => array(
				'title' => $this->l('EAN13'),
				'align' => 'center',
				'width' => 100,
				'filter_key' => 'a!ean13'
			),
			'name' => array(
				'title' => $this->l('Name'),
				'filter_key' => 'b!name'
			),
			'coverage' => array(
				'title' => $this->l('Average time left'),
				'width' => 150,
				'orderby' => false,
				'search' => false
			),
			'stock' => array(
				'title' => $this->l('Qty in stock'),
				'width' => 80,
				'orderby' => false,
				'search' => false
			),
		);

		$this->stock_cover_periods = array(
			$this->l('One week') => 7,
			$this->l('Two weeks') => 14,
			$this->l('Three weeks') => 21,
			$this->l('One month') => 31,
			$this->l('Six months') => 186,
			$this->l('One year') => 365
		);

		$this->stock_cover_warehouses = Warehouse::getWarehouseList(true);
		array_unshift($this->stock_cover_warehouses, array('id_warehouse' => -1, 'name' => $this->l('All Warehouses')));

		parent::__construct();
	}

	/**
	 * Method called when an ajax request is made
	 * @see AdminController::postProcess()
	 */
	public function ajaxProcess()
	{
		if (Tools::isSubmit('id'))
		{
			$this->lang = false;
			$lang_id = (int)$this->context->language->id;
			$product_id = (int)Tools::getValue('id');

			$query = '
			SELECT a.id_product_attribute as id, a.id_product, a.reference, a.ean13,
				   IFNULL(CONCAT(pl.name, \' : \', GROUP_CONCAT(agl.`name`, \' - \', al.name SEPARATOR \', \')),pl.name) as name,
				   IFNULL(s.physical_quantity, 0) as stock
			FROM '._DB_PREFIX_.'product_attribute a
			INNER JOIN '._DB_PREFIX_.'product_lang pl ON (pl.id_product = a.id_product AND pl.id_lang = '.$lang_id.')
			LEFT JOIN '._DB_PREFIX_.'product_attribute_combination pac ON (pac.id_product_attribute = a.id_product_attribute)
			LEFT JOIN '._DB_PREFIX_.'attribute atr ON (atr.id_attribute = pac.id_attribute)
			LEFT JOIN '._DB_PREFIX_.'attribute_lang al ON (al.id_attribute = atr.id_attribute AND al.id_lang = '.$lang_id.')
			LEFT JOIN '._DB_PREFIX_.'attribute_group_lang agl ON (agl.id_attribute_group = atr.id_attribute_group AND agl.id_lang = '.$lang_id.')
			INNER JOIN '._DB_PREFIX_.'stock s ON (a.id_product_attribute = s.id_product_attribute)
			WHERE a.id_product = '.$product_id.
			($this->getCurrentCoverageWarehouse() != -1 ? ' AND s.id_warehouse = '.$this->getCurrentCoverageWarehouse() : ' ').'
			GROUP BY a.id_product_attribute';

			$datas = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
			foreach ($datas as &$data)
			{
				if ($this->getCurrentCoverageWarehouse() == -1)
					$data['coverage'] = StockManagerFactory::getManager()->getProductCoverage($data['id_product'], $data['id'], $this->getCurrentCoveragePeriod());
				else
					$data['coverage'] = StockManagerFactory::getManager()->getProductCoverage($data['id_product'], $data['id'], $this->getCurrentCoveragePeriod(), $this->getCurrentCoverageWarehouse());
			}

			echo Tools::jsonEncode(array('data'=> $datas, 'fields_display' => $this->fieldsDisplay));
		}
		die;
	}

	/**
	 * AdminController::initList() override
	 * @see AdminController::initList()
	 */
	public function initList()
	{
		$this->addRowAction('details');

		$this->toolbar_btn = array();

		//no link on list rows
		$this->list_no_link = true;

		$this->_select = 'a.id_product as id, COUNT(pa.id_product_attribute) as variations, s.physical_quantity as stock';
		$this->_join = 'LEFT JOIN `'._DB_PREFIX_.'product_attribute` pa ON (pa.id_product = a.id_product)
						INNER JOIN `'._DB_PREFIX_.'stock` s ON (s.id_product = a.id_product)';
		$this->_where = 'AND s.id_product_attribute = 0';
		if ($this->getCurrentCoverageWarehouse() != -1)
			$this->_where .= ' AND s.id_warehouse = '.$this->getCurrentCoverageWarehouse();

		$this->context->smarty->assign('stock_cover_periods', $this->stock_cover_periods);
		$this->context->smarty->assign('stock_cover_cur_period', $this->getCurrentCoveragePeriod());
		$this->context->smarty->assign('stock_cover_warehouses', $this->stock_cover_warehouses);
		$this->context->smarty->assign('stock_cover_cur_warehouse', $this->getCurrentCoverageWarehouse());

		$this->displayInformation(
			$this->l('Considering the coverage period choosen and the quantity of products/combinations that you sold,
					  this interface gives you an idea of when one product will run out of stock.'
			)
		);

		return parent::initList();
	}

	/**
	 * AdminController::getList() override
	 * @see AdminController::getList()
	 */
	public function getList($id_lang, $order_by = null, $order_way = null, $start = 0, $limit = null, $id_lang_shop = false)
	{
		parent::getList($id_lang, $order_by, $order_way, $start, $limit, $id_lang_shop);

		$nb_items = count($this->_list);
		for ($i = 0; $i < $nb_items; ++$i)
		{
			$item = &$this->_list[$i];
			if ((int)$item['variations'] <= 0)
			{
				if ($this->getCurrentCoverageWarehouse() == -1)
					$item['coverage'] = StockManagerFactory::getManager()->getProductCoverage($item['id'], 0, $this->getCurrentCoveragePeriod());
				else
					$item['coverage'] = StockManagerFactory::getManager()->getProductCoverage($item['id'], 0, $this->getCurrentCoveragePeriod(), $this->getCurrentCoverageWarehouse());
				$this->addRowActionSkipList('details', array($item['id']));
			}
		}
	}

	/**
	 * Gets the current coverage period used
	 *
	 * @return int coverage period
	 */
	private function getCurrentCoveragePeriod()
	{
		static $coverage_period = 0;

		if ($coverage_period == 0)
		{
			$coverage_period = 7; // Week by default
			if ((int)Tools::getValue('coverage_period'))
				$coverage_period = (int)Tools::getValue('coverage_period');
		}
		return $coverage_period;
	}

	/**
	 * Gets the current warehouse used
	 *
	 * @return int id_warehouse
	 */
	private function getCurrentCoverageWarehouse()
	{
		static $warehouse = 0;

		if ($warehouse == 0)
		{
			$warehouse = -1;
			if ((int)Tools::getValue('coverage_warehouse'))
				$warehouse = (int)Tools::getValue('coverage_warehouse');
			else if ((int)$this->context->cookie->warehouse)
				$warehouse = (int)$this->context->cookie->warehouse;
			$this->context->cookie->warehouse = $warehouse;
		}
		return $warehouse;
	}
}