<?php
/*
* 2007-2013 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Academic Free License (AFL 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/afl-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  2007-2013 PrestaShop SA
*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

if (!defined('_PS_VERSION_'))
	exit;

class StatsBestProducts extends ModuleGrid
{
	private $_html = null;
	private $_query =  null;
	private $_columns = null;
	private $_defaultSortColumn = null;
	private $_defaultSortDirection = null;
	private $_emptyMessage = null;
	private $_pagingMessage = null;

	public function __construct()
	{
		$this->name = 'statsbestproducts';
		$this->tab = 'analytics_stats';
		$this->version = 1.0;
		$this->author = 'PrestaShop';
		$this->need_instance = 0;

		parent::__construct();

		$this->_defaultSortColumn = 'totalPriceSold';
		$this->_defaultSortDirection = 'DESC';
		$this->_emptyMessage = $this->l('An empty record-set was returned.');
		$this->_pagingMessage = sprintf($this->l('Displaying %1$s of %2$s'), '{0} - {1}', '{2}');

		$this->_columns = array(
			array(
				'id' => 'reference',
				'header' => $this->l('Ref.'),
				'dataIndex' => 'reference',
				'align' => 'left'
			),
			array(
				'id' => 'name',
				'header' => $this->l('Name'),
				'dataIndex' => 'name',
				'align' => 'left'
			),
			array(
				'id' => 'totalQuantitySold',
				'header' => $this->l('Quantity sold'),
				'dataIndex' => 'totalQuantitySold',
				'align' => 'center'
			),
			array(
				'id' => 'avgPriceSold',
				'header' => $this->l('Price sold'),
				'dataIndex' => 'avgPriceSold',
				'align' => 'right'
			),
			array(
				'id' => 'totalPriceSold',
				'header' => $this->l('Sales'),
				'dataIndex' => 'totalPriceSold',
				'align' => 'right'
			),
			array(
				'id' => 'averageQuantitySold',
				'header' => $this->l('Quantity sold in a day.'),
				'dataIndex' => 'averageQuantitySold',
				'align' => 'center'
			),
			array(
				'id' => 'totalPageViewed',
				'header' => $this->l('Page views'),
				'dataIndex' => 'totalPageViewed',
				'align' => 'center'
			),
			array(
				'id' => 'quantity',
				'header' => $this->l('Available quantity for sale.'),
				'dataIndex' => 'quantity',
				'align' => 'center'
			)
		);
		
		$this->displayName = $this->l('Best-selling products');
		$this->description = $this->l('A list of the best-selling products.');
	}

	public function install()
	{
		return (parent::install() && $this->registerHook('AdminStatsModules'));
	}

	public function hookAdminStatsModules($params)
	{
		$engineParams = array(
			'id' => 'id_product',
			'title' => $this->displayName,
			'columns' => $this->_columns,
			'defaultSortColumn' => $this->_defaultSortColumn,
			'defaultSortDirection' => $this->_defaultSortDirection,
			'emptyMessage' => $this->_emptyMessage,
			'pagingMessage' => $this->_pagingMessage
		);

		if (Tools::getValue('export'))
			$this->csvExport($engineParams);

		$this->_html = '
			<div class="panel-heading">
				'.$this->displayName.'
			</div>
			'.$this->engine($engineParams).'
			<a class="btn btn-default export-csv" href="'.htmlentities($_SERVER['REQUEST_URI']).'&export=1">
				<i class="icon-cloud-upload"></i> '.$this->l('CSV Export').'
			</a>';
		return $this->_html;
	}

	public function getData()
	{
		$currency = new Currency(Configuration::get('PS_CURRENCY_DEFAULT'));
		$dateBetween = $this->getDate();
		$arrayDateBetween = explode(' AND ', $dateBetween);

		$this->_query = 'SELECT SQL_CALC_FOUND_ROWS p.reference, p.id_product, pl.name,
				ROUND(AVG(od.product_price / o.conversion_rate), 2) as avgPriceSold,
				IFNULL(stock.quantity, 0) as quantity,
				IFNULL(SUM(od.product_quantity), 0) AS totalQuantitySold,
				ROUND(IFNULL(IFNULL(SUM(od.product_quantity), 0) / (1 + LEAST(TO_DAYS('.$arrayDateBetween[1].'), TO_DAYS(NOW())) - GREATEST(TO_DAYS('.$arrayDateBetween[0].'), TO_DAYS(product_shop.date_add))), 0), 2) as averageQuantitySold,
				ROUND(IFNULL(SUM((od.product_price * od.product_quantity) / o.conversion_rate), 0), 2) AS totalPriceSold,
				(
					SELECT IFNULL(SUM(pv.counter), 0)
					FROM '._DB_PREFIX_.'page pa
					LEFT JOIN '._DB_PREFIX_.'page_viewed pv ON pa.id_page = pv.id_page
					LEFT JOIN '._DB_PREFIX_.'date_range dr ON pv.id_date_range = dr.id_date_range
					WHERE pa.id_object = p.id_product AND pa.id_page_type = ('.(int)Page::getPageTypeByName('product').')
					AND dr.time_start BETWEEN '.$dateBetween.'
					AND dr.time_end BETWEEN '.$dateBetween.'
				) AS totalPageViewed
				FROM '._DB_PREFIX_.'product p
				'.Shop::addSqlAssociation('product', 'p').'
				LEFT JOIN '._DB_PREFIX_.'product_lang pl ON (p.id_product = pl.id_product AND pl.id_lang = '.(int)$this->getLang().Shop::addSqlRestrictionOnLang('pl').')
				LEFT JOIN '._DB_PREFIX_.'order_detail od ON od.product_id = p.id_product
				LEFT JOIN '._DB_PREFIX_.'orders o ON od.id_order = o.id_order
				'.Product::sqlStock('p', 0).'
				WHERE product_shop.active = 1
					AND o.valid = 1
					AND o.invoice_date BETWEEN '.$dateBetween.'
				GROUP BY od.product_id';

		if (Validate::IsName($this->_sort))
		{
			$this->_query .= ' ORDER BY `'.$this->_sort.'`';
			if (isset($this->_direction) && Validate::isSortDirection($this->_direction))
				$this->_query .= ' '.$this->_direction;
		}

		if (($this->_start === 0 || Validate::IsUnsignedInt($this->_start)) && Validate::IsUnsignedInt($this->_limit))
			$this->_query .= ' LIMIT '.$this->_start.', '.($this->_limit);
		$values = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($this->_query);
		foreach ($values as &$value)
		{
			$value['avgPriceSold'] = Tools::displayPrice($value['avgPriceSold'], $currency);
			$value['totalPriceSold'] = Tools::displayPrice($value['totalPriceSold'], $currency);
		}
		$this->_values = $values;
		$this->_totalCount = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('SELECT FOUND_ROWS()');
	}
}
