<?php
/**
 * Copyright since 2007 PrestaShop SA and Contributors
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Academic Free License 3.0 (AFL-3.0)
 * that is bundled with this package in the file LICENSE.md.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/AFL-3.0
 * 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 https://devdocs.prestashop.com/ for more information.
 *
 * @author    PrestaShop SA and Contributors <contact@prestashop.com>
 * @copyright Since 2007 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/AFL-3.0 Academic Free License 3.0 (AFL-3.0)
 */
if (!defined('_PS_VERSION_')) {
    exit;
}

class statsproduct extends ModuleGraph
{
    private $html = '';
    private $query = [];
    private $option = 0;
    private $id_product = 0;

    public function __construct()
    {
        $this->name = 'statsproduct';
        $this->tab = 'administration';
        $this->version = '2.1.3';
        $this->author = 'PrestaShop';
        $this->need_instance = 0;

        parent::__construct();

        $this->displayName = $this->trans('Product details', [], 'Modules.Statsproduct.Admin');
        $this->description = $this->trans('Enrich your stats, add detailed statistics for each product of your catalog.', [], 'Modules.Statsproduct.Admin');
        $this->ps_versions_compliancy = ['min' => '1.7.6.0', 'max' => _PS_VERSION_];
    }

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

    public function getTotalBought($id_product)
    {
        $date_between = ModuleGraph::getDateBetween();
        $sql = 'SELECT SUM(od.`product_quantity`) AS total
				FROM `' . _DB_PREFIX_ . 'order_detail` od
				LEFT JOIN `' . _DB_PREFIX_ . 'orders` o ON o.`id_order` = od.`id_order`
				WHERE od.`product_id` = ' . (int) $id_product . '
					' . Shop::addSqlRestriction(Shop::SHARE_ORDER, 'o') . '
					AND o.valid = 1
					AND o.`date_add` BETWEEN ' . $date_between;

        return (int) Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->getValue($sql);
    }

    public function getTotalSales($id_product)
    {
        $date_between = ModuleGraph::getDateBetween();
        $sql = 'SELECT SUM(od.`total_price_tax_excl`) AS total
				FROM `' . _DB_PREFIX_ . 'order_detail` od
				LEFT JOIN `' . _DB_PREFIX_ . 'orders` o ON o.`id_order` = od.`id_order`
				WHERE od.`product_id` = ' . (int) $id_product . '
					' . Shop::addSqlRestriction(Shop::SHARE_ORDER, 'o') . '
					AND o.valid = 1
					AND o.`date_add` BETWEEN ' . $date_between;

        return (float) Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->getValue($sql);
    }

    public function getTotalViewed($id_product)
    {
        $date_between = ModuleGraph::getDateBetween();
        $sql = 'SELECT SUM(pv.`counter`) AS total
				FROM `' . _DB_PREFIX_ . 'page_viewed` pv
				LEFT JOIN `' . _DB_PREFIX_ . 'date_range` dr ON pv.`id_date_range` = dr.`id_date_range`
				LEFT JOIN `' . _DB_PREFIX_ . 'page` p ON pv.`id_page` = p.`id_page`
				LEFT JOIN `' . _DB_PREFIX_ . 'page_type` pt ON pt.`id_page_type` = p.`id_page_type`
				WHERE pt.`name` = \'product\'
					' . Shop::addSqlRestriction(false, 'pv') . '
					AND p.`id_object` = ' . (int) $id_product . '
					AND dr.`time_start` BETWEEN ' . $date_between . '
					AND dr.`time_end` BETWEEN ' . $date_between;
        $result = Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->getRow($sql);

        return isset($result['total']) ? $result['total'] : 0;
    }

    private function getProducts($id_lang)
    {
        $sql = 'SELECT p.`id_product`, p.reference, pl.`name`, IFNULL(stock.quantity, 0) as quantity
				FROM `' . _DB_PREFIX_ . 'product` p
				' . Product::sqlStock('p', 0) . '
				LEFT JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON p.`id_product` = pl.`id_product`' . Shop::addSqlRestrictionOnLang('pl') . '
				' . Shop::addSqlAssociation('product', 'p') . '
				' . (Tools::getValue('id_category') ? 'LEFT JOIN `' . _DB_PREFIX_ . 'category_product` cp ON p.`id_product` = cp.`id_product`' : '') . '
				WHERE pl.`id_lang` = ' . (int) $id_lang . '
					' . (Tools::getValue('id_category') ? 'AND cp.id_category = ' . (int) Tools::getValue('id_category') : '');
        if (version_compare(_PS_VERSION_, '1.7.0.0', '>=')) {
            $sql .= ' AND p.state = ' . Product::STATE_SAVED;
        }
        $sql .= ' ORDER BY pl.`name`';

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

    private function getSales($id_product)
    {
        $sql = 'SELECT o.date_add, o.id_order, o.id_customer, od.product_quantity, (od.unit_price_tax_excl * od.product_quantity) as total, od.tax_name, od.product_name
				FROM `' . _DB_PREFIX_ . 'orders` o
				LEFT JOIN `' . _DB_PREFIX_ . 'order_detail` od ON o.id_order = od.id_order
				WHERE o.date_add BETWEEN ' . $this->getDate() . '
					' . Shop::addSqlRestriction(Shop::SHARE_ORDER, 'o') . '
					AND o.valid = 1
					AND od.product_id = ' . (int) $id_product;

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

    private function getCrossSales($id_product, $id_lang)
    {
        $sql = 'SELECT pl.name as pname, pl.id_product, SUM(od.product_quantity) as pqty, AVG(od.unit_price_tax_excl) as pprice
				FROM `' . _DB_PREFIX_ . 'orders` o
				LEFT JOIN `' . _DB_PREFIX_ . 'order_detail` od ON o.id_order = od.id_order
				LEFT JOIN `' . _DB_PREFIX_ . 'product_lang` pl ON (pl.id_product = od.product_id AND pl.id_lang = ' . (int) $id_lang . Shop::addSqlRestrictionOnLang('pl') . ')
				WHERE o.id_customer IN (
						SELECT o.id_customer
						FROM `' . _DB_PREFIX_ . 'orders` o
						LEFT JOIN `' . _DB_PREFIX_ . 'order_detail` od ON o.id_order = od.id_order
						WHERE o.date_add BETWEEN ' . $this->getDate() . '
						AND o.valid = 1
						AND od.product_id = ' . (int) $id_product . '
					)
					' . Shop::addSqlRestriction(Shop::SHARE_ORDER, 'o') . '
					AND o.date_add BETWEEN ' . $this->getDate() . '
					AND o.valid = 1
					AND od.product_id != ' . (int) $id_product . '
				GROUP BY od.product_id
				ORDER BY pqty DESC';

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

    public function hookDisplayAdminStatsModules()
    {
        $id_category = (int) Tools::getValue('id_category');
        $currency = Context::getContext()->currency;

        if (Tools::getValue('export')) {
            if (!Tools::getValue('exportType')) {
                $this->csvExport([
                    'layers' => 2,
                    'type' => 'line',
                    'option' => '42',
                ]);
            }
        }

        $this->html = '
			<div class="panel-heading">
				' . $this->displayName . '
			</div>
			<h4>' . $this->trans('Guide', [], 'Admin.Global') . '</h4>
			<div class="alert alert-warning">
				<h4>' . $this->trans('Number of purchases compared to number of views', [], 'Modules.Statsproduct.Admin') . '</h4>
					' . $this->trans('After choosing a category and selecting a product, informational graphs will appear.', [], 'Modules.Statsproduct.Admin') . '
					<ul>
						<li class="bullet">' . $this->trans('If you notice that a product is often purchased but viewed infrequently, you should display it more prominently in your Front Office.', [], 'Modules.Statsproduct.Admin') . '</li>
						<li class="bullet">' . $this->trans('On the other hand, if a product has many views but is not often purchased, we advise you to check or modify this product\'s information, description and photography again, see if you can find something better.', [], 'Modules.Statsproduct.Admin') . '
						</li>
					</ul>
			</div>';
        if ($id_product = (int) Tools::getValue('id_product')) {
            if (Tools::getValue('export')) {
                if (Tools::getValue('exportType') == 1) {
                    $this->csvExport([
                        'layers' => 2,
                        'type' => 'line',
                        'option' => '1-' . $id_product,
                    ]);
                } elseif (Tools::getValue('exportType') == 2) {
                    $this->csvExport([
                        'type' => 'pie',
                        'option' => '3-' . $id_product,
                    ]);
                }
            }
            $product = new Product($id_product, false, $this->context->language->id);
            $total_bought = $this->getTotalBought($product->id);
            $total_sales = $this->getTotalSales($product->id);
            $total_viewed = $this->getTotalViewed($product->id);
            $this->html .= '<h4>' . $product->name . ' - ' . $this->trans('Details', [], 'Modules.Statsproduct.Admin') . '</h4>
			<div class="row row-margin-bottom">
				<div class="col-lg-12">
					<div class="col-lg-8">
						' . $this->engine([
                    'layers' => 2,
                    'type' => 'line',
                    'option' => '1-' . $id_product,
                ]) . '
					</div>
					<div class="col-lg-4">
						<ul class="list-unstyled">
							<li>' . $this->trans('Total bought', [], 'Modules.Statsproduct.Admin') . ' ' . $total_bought . '</li>
							<li>' . $this->trans('Sales (tax excluded)', [], 'Modules.Statsproduct.Admin') . ' ' . $this->context->getCurrentLocale()->formatPrice($total_sales, $currency->iso_code) . '</li>
							<li>' . $this->trans('Total Viewed', [], 'Modules.Statsproduct.Admin') . ' ' . $total_viewed . '</li>
							<li>' . $this->trans('Conversion rate', [], 'Modules.Statsproduct.Admin') . ' ' . number_format($total_viewed ? $total_bought / $total_viewed : 0, 2) . '</li>
						</ul>
						<a class="btn btn-default export-csv" href="' . Tools::safeOutput($_SERVER['REQUEST_URI']) . '&export=1&exportType=1">
							<i class="icon-cloud-upload"></i> ' . $this->trans('CSV Export', [], 'Modules.Statsproduct.Admin') . '
						</a>
					</div>
				</div>
			</div>';
            if ($has_attribute = $product->hasAttributes() && $total_bought) {
                $this->html .= '
				<h3 class="space">' . $this->trans('Attribute sales distribution', [], 'Modules.Statsproduct.Admin') . '</h3>
				<center>' . $this->engine(['type' => 'pie', 'option' => '3-' . $id_product]) . '</center><br />
				<a href="' . Tools::safeOutput($_SERVER['REQUEST_URI']) . '&export=1&exportType=2"><img src="../img/admin/asterisk.gif" alt=""/>' . $this->trans('CSV Export', [], 'Modules.Statsproduct.Admin') . '</a>';
            }
            if ($total_bought) {
                $sales = $this->getSales($id_product);
                $this->html .= '
				<h4>' . $this->trans('Sales', [], 'Admin.Global') . '</h4>
				<div style="overflow-y:scroll;height:' . min(400, (count($sales) + 1) * 32) . 'px">
					<table class="table">
						<thead>
							<tr>
								<th>
									<span class="title_box  active">' . $this->trans('Date', [], 'Admin.Global') . '</span>
								</th>
								<th>
									<span class="title_box  active">' . $this->trans('Order', [], 'Admin.Global') . '</span>
								</th>
								<th>
									<span class="title_box  active">' . $this->trans('Customer', [], 'Admin.Global') . '</span>
								</th>
								' . ($has_attribute ? '<th><span class="title_box  active">' . $this->trans('Attribute', [], 'Admin.Global') . '</span></th>' : '') . '
								<th>
									<span class="title_box  active">' . $this->trans('Quantity', [], 'Admin.Global') . '</span>
								</th>
								<th>
									<span class="title_box  active">' . $this->trans('Price', [], 'Admin.Global') . '</span>
								</th>
							</tr>
						</thead>
						<tbody>';
                $token_order = Tools::getAdminToken('AdminOrders' . (int) Tab::getIdFromClassName('AdminOrders') . (int) $this->context->employee->id);
                $token_customer = Tools::getAdminToken('AdminCustomers' . (int) Tab::getIdFromClassName('AdminCustomers') . (int) $this->context->employee->id);
                foreach ($sales as $sale) {
                    $this->html .= '
						<tr>
							<td>' . Tools::displayDate($sale['date_add']) . '</td>
							<td class="text-center"><a href="?controller=AdminOrders&id_order=' . $sale['id_order'] . '&vieworder&token=' . $token_order . '">' . (int) $sale['id_order'] . '</a></td>
							<td class="text-center"><a href="?controller=AdminCustomers&id_customer=' . $sale['id_customer'] . '&viewcustomer&token=' . $token_customer . '">' . (int) $sale['id_customer'] . '</a></td>
							' . ($has_attribute ? '<td>' . $sale['product_name'] . '</td>' : '') . '
							<td>' . (int) $sale['product_quantity'] . '</td>
							<td>' . $this->context->getCurrentLocale()->formatPrice($sale['total'], $currency->iso_code) . '</td>
						</tr>';
                }
                $this->html .= '
						</tbody>
					</table>
				</div>';

                $cross_selling = $this->getCrossSales($id_product, $this->context->language->id);
                if (count($cross_selling)) {
                    $this->html .= '
					<h4>' . $this->trans('Cross selling', [], 'Modules.Statsproduct.Admin') . '</h4>
					<div style="overflow-y:scroll;height:200px">
						<table class="table">
							<thead>
								<tr>
									<th>
										<span class="title_box active">' . $this->trans('Product name', [], 'Admin.Shopparameters.Feature') . '</span>
									</th>
									<th>
										<span class="title_box active">' . $this->trans('Quantity sold', [], 'Admin.Global') . '</span>
									</th>
									<th>
										<span class="title_box active">' . $this->trans('Average price', [], 'Admin.Global') . '</span>
									</th>
								</tr>
							</thead>
						<tbody>';
                    $token_products = Tools::getAdminToken('AdminProducts' . (int) Tab::getIdFromClassName('AdminProducts') . (int) $this->context->employee->id);
                    foreach ($cross_selling as $selling) {
                        $this->html .= '
							<tr>
								<td><a href="?controller=AdminProducts&id_product=' . (int) $selling['id_product'] . '&addproduct&token=' . $token_products . '">' . $selling['pname'] . '</a></td>
								<td class="text-center">' . (int) $selling['pqty'] . '</td>
								<td class="text-right">' . $this->context->getCurrentLocale()->formatPrice($selling['pprice'], $currency->iso_code) . '</td>
							</tr>';
                    }
                    $this->html .= '
							</tbody>
						</table>
					</div>';
                }
            }
        } else {
            $categories = Category::getCategories((int) $this->context->language->id, true, false);
            $this->html .= '
			<form action="#" method="post" id="categoriesForm" class="form-horizontal">
				<div class="row row-margin-bottom">
					<label class="control-label col-lg-3">
						<span title="" data-toggle="tooltip" class="label-tooltip" data-original-title="' . $this->trans('Click on a product to access its statistics!', [], 'Modules.Statsproduct.Admin') . '">
							' . $this->trans('Choose a category', [], 'Modules.Statsproduct.Admin') . '
						</span>
					</label>
					<div class="col-lg-3">
						<select name="id_category" onchange="$(\'#categoriesForm\').submit();">
							<option value="0">' . $this->trans('All', [], 'Admin.Global') . '</option>';
            foreach ($categories as $category) {
                $this->html .= '<option value="' . $category['id_category'] . '"' . ($id_category == $category['id_category'] ? ' selected="selected"' : '') . '>' . $category['name'] . '</option>';
            }
            $this->html .= '
						</select>
					</div>
				</div>
			</form>
			<h4>' . $this->trans('Products available', [], 'Modules.Statsproduct.Admin') . '</h4>
			<table class="table" style="border: 0; cellspacing: 0;">
				<thead>
					<tr>
						<th>
							<span class="title_box  active">' . $this->trans('Reference', [], 'Admin.Global') . '</span>
						</th>
						<th>
							<span class="title_box  active">' . $this->trans('Name', [], 'Admin.Global') . '</span>
						</th>
						<th>
							<span class="title_box  active">' . $this->trans('Available quantity for sale', [], 'Admin.Global') . '</span>
						</th>
					</tr>
				</thead>
				<tbody>';

            foreach ($this->getProducts($this->context->language->id) as $product) {
                $this->html .= '
				<tr>
					<td>' . $product['reference'] . '</td>
					<td>
						<a href="' . Tools::safeOutput(AdminController::$currentIndex . '&token=' . Tools::getValue('token') . '&module=' . $this->name . '&id_product=' . $product['id_product']) . '">' . $product['name'] . '</a>
					</td>
					<td>' . $product['quantity'] . '</td>
				</tr>';
            }

            $this->html .= '
				</tbody>
			</table>
			<a class="btn btn-default export-csv" href="' . Tools::safeOutput($_SERVER['REQUEST_URI'] . '&export=1') . '">
				<i class="icon-cloud-upload"></i> ' . $this->trans('CSV Export', [], 'Modules.Statsproduct.Admin') . '
			</a>';
        }

        return $this->html;
    }

    public function setOption($option, $layers = 1)
    {
        $options = explode('-', $option);
        if (count($options) === 2) {
            list($this->option, $this->id_product) = $options;
        } else {
            $this->option = $option;
        }
        $date_between = $this->getDate();
        switch ($this->option) {
            case 1:
                $this->_titles['main'][0] = $this->trans('Popularity', [], 'Modules.Statsproduct.Admin');
                $this->_titles['main'][1] = $this->trans('Sales', [], 'Admin.Global');
                $this->_titles['main'][2] = $this->trans('Visits (x100)', [], 'Modules.Statsproduct.Admin');
          $this->query = [];
                $this->query[0] = 'SELECT o.`date_add`, SUM(od.`product_quantity`) AS total
						FROM `' . _DB_PREFIX_ . 'order_detail` od
						LEFT JOIN `' . _DB_PREFIX_ . 'orders` o ON o.`id_order` = od.`id_order`
						WHERE od.`product_id` = ' . (int) $this->id_product . '
							' . Shop::addSqlRestriction(Shop::SHARE_ORDER, 'o') . '
							AND o.valid = 1
							AND o.`date_add` BETWEEN ' . $date_between . '
						GROUP BY o.`date_add`';

                $this->query[1] = 'SELECT dr.`time_start` AS date_add, (SUM(pv.`counter`) / 100) AS total
						FROM `' . _DB_PREFIX_ . 'page_viewed` pv
						LEFT JOIN `' . _DB_PREFIX_ . 'date_range` dr ON pv.`id_date_range` = dr.`id_date_range`
						LEFT JOIN `' . _DB_PREFIX_ . 'page` p ON pv.`id_page` = p.`id_page`
						LEFT JOIN `' . _DB_PREFIX_ . 'page_type` pt ON pt.`id_page_type` = p.`id_page_type`
						WHERE pt.`name` = \'product\'
							' . Shop::addSqlRestriction(false, 'pv') . '
							AND p.`id_object` = ' . (int) $this->id_product . '
							AND dr.`time_start` BETWEEN ' . $date_between . '
							AND dr.`time_end` BETWEEN ' . $date_between . '
						GROUP BY dr.`time_start`';
                break;

            case 3:
                $this->query = 'SELECT product_attribute_id, SUM(od.`product_quantity`) AS total, od.product_name AS product_name
						FROM `' . _DB_PREFIX_ . 'orders` o
						LEFT JOIN `' . _DB_PREFIX_ . 'order_detail` od ON o.`id_order` = od.`id_order`
						WHERE od.`product_id` = ' . (int) $this->id_product . '
							' . Shop::addSqlRestriction(Shop::SHARE_ORDER, 'o') . '
							AND o.valid = 1
							AND o.`date_add` BETWEEN ' . $date_between . '
						GROUP BY od.`product_attribute_id`';
                $this->_titles['main'] = $this->trans('Attributes', [], 'Admin.Global');
                break;

            case 42:
                $this->_titles['main'][1] = $this->trans('Reference', [], 'Admin.Global');
                $this->_titles['main'][2] = $this->trans('Name', [], 'Admin.Global');
                $this->_titles['main'][3] = $this->trans('Stock', [], 'Modules.Statsproduct.Admin');
                break;
        }
    }

    protected function getData($layers)
    {
        if ($this->option == 42) {
            $products = $this->getProducts($this->context->language->id);
            foreach ($products as $product) {
                $this->_values[0][] = $product['reference'];
                $this->_values[1][] = $product['name'];
                $this->_values[2][] = $product['quantity'];
                $this->_legend[] = $product['id_product'];
            }
        } elseif ($this->option != 3) {
            $this->setDateGraph($layers, true);
        } else {
            $result = Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->executeS($this->query);
            foreach ($result as $row) {
                $this->_values[] = $row['total'];
                $this->_legend[] = $row['product_name'];
            }
        }
    }

    protected function setAllTimeValues($layers)
    {
        for ($i = 0; $i < $layers; ++$i) {
            $result = Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->executeS($this->query[$i]);
            foreach ($result as $row) {
                $this->_values[$i][(int) substr($row['date_add'], 0, 4)] += $row['total'];
            }
        }
    }

    protected function setYearValues($layers)
    {
        for ($i = 0; $i < $layers; ++$i) {
            $result = Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->executeS($this->query[$i]);
            foreach ($result as $row) {
                $this->_values[$i][(int) substr($row['date_add'], 5, 2)] += $row['total'];
            }
        }
    }

    protected function setMonthValues($layers)
    {
        for ($i = 0; $i < $layers; ++$i) {
            $result = Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->executeS($this->query[$i]);
            foreach ($result as $row) {
                $this->_values[$i][(int) substr($row['date_add'], 8, 2)] += $row['total'];
            }
        }
    }

    protected function setDayValues($layers)
    {
        for ($i = 0; $i < $layers; ++$i) {
            $result = Db::getInstance((bool) _PS_USE_SQL_SLAVE_)->executeS($this->query[$i]);
            foreach ($result as $row) {
                $this->_values[$i][(int) substr($row['date_add'], 11, 2)] += $row['total'];
            }
        }
    }
}