<?php
/*
* 2007-2015 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  2007-2015 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 statsstock extends Module
{
    private $html = '';

    public function __construct()
    {
        $this->name = 'statsstock';
        $this->tab = 'analytics_stats';
        $this->version = '2.0.0';
        $this->author = 'PrestaShop';
        $this->need_instance = 0;

        parent::__construct();

        $this->displayName = $this->trans('Available quantities', array(), 'Modules.Statsstock.Admin');
        $this->description = $this->trans('Adds a tab showing the quantity of available products for sale to the Stats dashboard.', array(), 'Modules.Statsstock.Admin');
        $this->ps_versions_compliancy = array('min' => '1.7.1.0', 'max' => _PS_VERSION_);
    }

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

    public function hookAdminStatsModules()
    {
        if (Tools::isSubmit('submitCategory')) {
            $this->context->cookie->statsstock_id_category = Tools::getValue('statsstock_id_category');
        }

        $ru = AdminController::$currentIndex.'&module='.$this->name.'&token='.Tools::getValue('token');
        $currency = new Currency(Configuration::get('PS_CURRENCY_DEFAULT'));
        $filter = ((int)$this->context->cookie->statsstock_id_category ? ' AND p.id_product IN (SELECT cp.id_product FROM '._DB_PREFIX_.'category_product cp WHERE cp.id_category = '.(int)$this->context->cookie->statsstock_id_category.')' : '');

        $sql = 'SELECT p.id_product, p.reference, pl.name,
				IFNULL((
					SELECT AVG(product_attribute_shop.wholesale_price)
					FROM '._DB_PREFIX_.'product_attribute pa
					'.Shop::addSqlAssociation('product_attribute', 'pa').'
					WHERE p.id_product = pa.id_product
					AND product_attribute_shop.wholesale_price != 0
				), product_shop.wholesale_price) as wholesale_price,
				IFNULL(stock.quantity, 0) as quantity
				FROM '._DB_PREFIX_.'product p
				'.Shop::addSqlAssociation('product', 'p').'
				INNER JOIN '._DB_PREFIX_.'product_lang pl
					ON (p.id_product = pl.id_product AND pl.id_lang = '.(int)$this->context->language->id.Shop::addSqlRestrictionOnLang('pl').')
				'.Product::sqlStock('p', 0).'
				WHERE 1 = 1
				'.$filter;
        $products = Db::getInstance()->executeS($sql);

        foreach ($products as $key => $p) {
            $products[$key]['stockvalue'] = $p['wholesale_price'] * $p['quantity'];
        }

        $this->html .= '
		<script type="text/javascript">$(\'#calendar\').slideToggle();</script>

		<div class="panel-heading">'
            .$this->trans('Evaluation of available quantities for sale', array(), 'Modules.Statsstock.Admin').
        '</div>
		<form action="'.Tools::safeOutput($ru).'" method="post" class="form-horizontal">
			<div class="row row-margin-bottom">
				<label class="control-label col-lg-3">'.$this->trans('Category', array(), 'Admin.Global').'</label>
				<div class="col-lg-6">
					<select name="statsstock_id_category" onchange="this.form.submit();">
						<option value="0">- '.$this->trans('All', array(), 'Admin.Global').' -</option>';
        foreach (Category::getSimpleCategories($this->context->language->id) as $category) {
            $this->html .= '<option value="'.(int)$category['id_category'].'" '.
                        ($this->context->cookie->statsstock_id_category == $category['id_category'] ? 'selected="selected"' : '').'>'.
                        $category['name'].'
					</option>';
        }
        $this->html .= '
					</select>
					<input type="hidden" name="submitCategory" value="1" />
				</div>
			</div>
		</form>';

        if (!count($products)) {
            $this->html .= '<p>'.$this->trans('Your catalog is empty.', array(), 'Modules.Statsstock.Admin').'</p>';
        } else {
            $rollup = array('quantity' => 0, 'wholesale_price' => 0, 'stockvalue' => 0);
            $this->html .= '
			<table class="table">
				<thead>
					<tr>
						<th><span class="title_box active">'.$this->trans('ID', array(), 'Admin.Global').'</span></th>
						<th><span class="title_box active">'.$this->trans('Ref.', array(), 'Modules.Statsstock.Admin').'</span></th>
						<th><span class="title_box active">'.$this->trans('Item', array(), 'Admin.Global').'</span></th>
						<th><span class="title_box active">'.$this->trans('Available quantity for sale', array(), 'Admin.Global').'</span></th>
						<th><span class="title_box active">'.$this->trans('Price*', array(), 'Modules.Statsstock.Admin').'</span></th>
						<th><span class="title_box active">'.$this->trans('Value', array(), 'Admin.Global').'</span></th>
					</tr>
				</thead>
				<tbody>';
            foreach ($products as $product) {
                $rollup['quantity'] += $product['quantity'];
                $rollup['wholesale_price'] += $product['wholesale_price'];
                $rollup['stockvalue'] += $product['stockvalue'];
                $this->html .= '<tr>
						<td>'.$product['id_product'].'</td>
						<td>'.$product['reference'].'</td>
						<td>'.$product['name'].'</td>
						<td>'.$product['quantity'].'</td>
						<td>'.Tools::displayPrice($product['wholesale_price'], $currency).'</td>
						<td>'.Tools::displayPrice($product['stockvalue'], $currency).'</td>
					</tr>';
            }
            $this->html .= '
				</tbody>
				<tfoot>
					<tr>
						<th colspan="3"></th>
						<th><span class="title_box active">'.$this->trans('Total quantities', array(), 'Modules.Statsstock.Admin').'</span></th>
						<th><span class="title_box active">'.$this->trans('Average price', array(), 'Admin.Global').'</span></th>
						<th><span class="title_box active">'.$this->trans('Total value', array(), 'Modules.Statsstock.Admin').'</span></th>
					</tr>
					<tr>
						<td colspan="3"></td>
						<td>'.$rollup['quantity'].'</td>
						<td>'.Tools::displayPrice($rollup['wholesale_price'] / count($products), $currency).'</td>
						<td>'.Tools::displayPrice($rollup['stockvalue'], $currency).'</td>
					</tr>
				</tfoot>
			</table>
			<i class="icon-asterisk"></i> '.$this->trans('This section corresponds to the default wholesale price according to the default supplier for the product. An average price is used when the product has attributes.', array(), 'Modules.Statsstock.Admin');

            return $this->html;
        }
    }
}
