public function displayAjaxGetKpi()
    {
        $currency = new Currency(Configuration::get('PS_CURRENCY_DEFAULT'));
        switch (Tools::getValue('kpi')) {
            case 'conversion_rate':
                $visitors = AdminStatsController::getVisits(true, date('Y-m-d', strtotime('-31 day')), date('Y-m-d', strtotime('-1 day')), false);
                $orders = AdminStatsController::getOrders(date('Y-m-d', strtotime('-31 day')), date('Y-m-d', strtotime('-1 day')), false);
                // $data = array();
                // $from = strtotime(date('Y-m-d 00:00:00', strtotime('-31 day')));
                // $to = strtotime(date('Y-m-d 23:59:59', strtotime('-1 day')));
                // for ($date = $from; $date <= $to; $date = strtotime('+1 day', $date))
                // if (isset($visitors[$date]) && $visitors[$date])
                // $data[$date] = round(100 * ((isset($orders[$date]) && $orders[$date]) ? $orders[$date] : 0) / $visitors[$date], 2);
                // else
                // $data[$date] = 0;
                $visits_sum = $visitors;
                //array_sum($visitors);
                $orders_sum = $orders;
                //array_sum($orders);
                if ($visits_sum) {
                    $value = round(100 * $orders_sum / $visits_sum, 2);
                } elseif ($orders_sum) {
                    $value = '&infin;';
                } else {
                    $value = 0;
                }
                $value .= '%';
                // ConfigurationKPI::updateValue('CONVERSION_RATE_CHART', Tools::jsonEncode($data));
                ConfigurationKPI::updateValue('CONVERSION_RATE', $value);
                ConfigurationKPI::updateValue('CONVERSION_RATE_EXPIRE', strtotime(date('Y-m-d 00:00:00', strtotime('+1 day'))));
                break;
            case 'abandoned_cart':
                $value = AdminStatsController::getAbandonedCarts(date('Y-m-d H:i:s', strtotime('-2 day')), date('Y-m-d H:i:s', strtotime('-1 day')));
                ConfigurationKPI::updateValue('ABANDONED_CARTS', $value);
                ConfigurationKPI::updateValue('ABANDONED_CARTS_EXPIRE', strtotime('+1 hour'));
                break;
            case 'installed_modules':
                $value = AdminStatsController::getInstalledModules();
                ConfigurationKPI::updateValue('INSTALLED_MODULES', $value);
                ConfigurationKPI::updateValue('INSTALLED_MODULES_EXPIRE', strtotime('+2 min'));
                break;
            case 'disabled_modules':
                $value = AdminStatsController::getDisabledModules();
                ConfigurationKPI::updateValue('DISABLED_MODULES', $value);
                ConfigurationKPI::updateValue('DISABLED_MODULES_EXPIRE', strtotime('+2 min'));
                break;
            case 'update_modules':
                $value = AdminStatsController::getModulesToUpdate();
                ConfigurationKPI::updateValue('UPDATE_MODULES', $value);
                ConfigurationKPI::updateValue('UPDATE_MODULES_EXPIRE', strtotime('+2 min'));
                break;
            case 'percent_product_stock':
                $value = AdminStatsController::getPercentProductStock();
                ConfigurationKPI::updateValue('PERCENT_PRODUCT_STOCK', $value);
                ConfigurationKPI::updateValue('PERCENT_PRODUCT_STOCK_EXPIRE', strtotime('+4 hour'));
                break;
            case 'product_avg_gross_margin':
                $value = AdminStatsController::getProductAverageGrossMargin();
                ConfigurationKPI::updateValue('PRODUCT_AVG_GROSS_MARGIN', $value);
                ConfigurationKPI::updateValue('PRODUCT_AVG_GROSS_MARGIN_EXPIRE', strtotime('+6 hour'));
                break;
            case 'disabled_categories':
                $value = AdminStatsController::getDisabledCategories();
                ConfigurationKPI::updateValue('DISABLED_CATEGORIES', $value);
                ConfigurationKPI::updateValue('DISABLED_CATEGORIES_EXPIRE', strtotime('+2 hour'));
                break;
            case 'disabled_products':
                $value = AdminStatsController::getDisabledProducts();
                ConfigurationKPI::updateValue('DISABLED_PRODUCTS', $value);
                ConfigurationKPI::updateValue('DISABLED_PRODUCTS_EXPIRE', strtotime('+2 hour'));
                break;
            case '8020_sales_catalog':
                $value = AdminStatsController::get8020SalesCatalog(date('Y-m-d', strtotime('-1 month')), date('Y-m-d'));
                $value = sprintf($this->l('%d%% of your Catalog'), $value);
                ConfigurationKPI::updateValue('8020_SALES_CATALOG', $value);
                ConfigurationKPI::updateValue('8020_SALES_CATALOG_EXPIRE', strtotime('+12 hour'));
                break;
            case 'empty_categories':
                $value = AdminStatsController::getEmptyCategories();
                ConfigurationKPI::updateValue('EMPTY_CATEGORIES', $value);
                ConfigurationKPI::updateValue('EMPTY_CATEGORIES_EXPIRE', strtotime('+2 hour'));
                break;
            case 'customer_main_gender':
                $value = AdminStatsController::getCustomerMainGender();
                if ($value === false) {
                    $value = $this->l('No customers', null, null, false);
                } elseif ($value['type'] == 'female') {
                    $value = sprintf($this->l('%d%% Women Customers', null, null, false), $value['value']);
                } elseif ($value['type'] == 'male') {
                    $value = sprintf($this->l('%d%% Men Customers', null, null, false), $value['value']);
                } else {
                    $value = sprintf($this->l('%d%% Neutral Customers', null, null, false), $value['value']);
                }
                ConfigurationKPI::updateValue('CUSTOMER_MAIN_GENDER', array($this->context->language->id => $value));
                ConfigurationKPI::updateValue('CUSTOMER_MAIN_GENDER_EXPIRE', array($this->context->language->id => strtotime('+1 day')));
                break;
            case 'avg_customer_age':
                $value = sprintf($this->l('%d years', null, null, false), AdminStatsController::getAverageCustomerAge(), 1);
                ConfigurationKPI::updateValue('AVG_CUSTOMER_AGE', $value);
                ConfigurationKPI::updateValue('AVG_CUSTOMER_AGE_EXPIRE', strtotime('+1 day'));
                break;
            case 'pending_messages':
                $value = (int) AdminStatsController::getPendingMessages();
                ConfigurationKPI::updateValue('PENDING_MESSAGES', $value);
                ConfigurationKPI::updateValue('PENDING_MESSAGES_EXPIRE', strtotime('+5 min'));
                break;
            case 'avg_msg_response_time':
                $value = sprintf($this->l('%.1f hours', null, null, false), AdminStatsController::getAverageMessageResponseTime(date('Y-m-d', strtotime('-31 day')), date('Y-m-d', strtotime('-1 day'))));
                ConfigurationKPI::updateValue('AVG_MSG_RESPONSE_TIME', $value);
                ConfigurationKPI::updateValue('AVG_MSG_RESPONSE_TIME_EXPIRE', strtotime('+4 hour'));
                break;
            case 'messages_per_thread':
                $value = round(AdminStatsController::getMessagesPerThread(date('Y-m-d', strtotime('-31 day')), date('Y-m-d', strtotime('-1 day'))), 1);
                ConfigurationKPI::updateValue('MESSAGES_PER_THREAD', $value);
                ConfigurationKPI::updateValue('MESSAGES_PER_THREAD_EXPIRE', strtotime('+12 hour'));
                break;
            case 'newsletter_registrations':
                $value = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
				SELECT COUNT(*)
				FROM `' . _DB_PREFIX_ . 'customer`
				WHERE newsletter = 1
				' . Shop::addSqlRestriction(Shop::SHARE_ORDER));
                if (Module::isInstalled('blocknewsletter')) {
                    $value += Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
					SELECT COUNT(*)
					FROM `' . _DB_PREFIX_ . 'newsletter`
					WHERE active = 1
					' . Shop::addSqlRestriction(Shop::SHARE_ORDER));
                }
                ConfigurationKPI::updateValue('NEWSLETTER_REGISTRATIONS', $value);
                ConfigurationKPI::updateValue('NEWSLETTER_REGISTRATIONS_EXPIRE', strtotime('+6 hour'));
                break;
            case 'enabled_languages':
                $value = Language::countActiveLanguages();
                ConfigurationKPI::updateValue('ENABLED_LANGUAGES', $value);
                ConfigurationKPI::updateValue('ENABLED_LANGUAGES_EXPIRE', strtotime('+1 min'));
                break;
            case 'frontoffice_translations':
                $themes = Theme::getThemes();
                $languages = Language::getLanguages();
                $total = $translated = 0;
                foreach ($themes as $theme) {
                    foreach ($languages as $language) {
                        $kpi_key = substr(strtoupper($theme->name . '_' . $language['iso_code']), 0, 16);
                        $total += ConfigurationKPI::get('TRANSLATE_TOTAL_' . $kpi_key);
                        $translated += ConfigurationKPI::get('TRANSLATE_DONE_' . $kpi_key);
                    }
                }
                $value = 0;
                if ($translated) {
                    $value = round(100 * $translated / $total, 1);
                }
                $value .= '%';
                ConfigurationKPI::updateValue('FRONTOFFICE_TRANSLATIONS', $value);
                ConfigurationKPI::updateValue('FRONTOFFICE_TRANSLATIONS_EXPIRE', strtotime('+2 min'));
                break;
            case 'main_country':
                if (!($row = AdminStatsController::getMainCountry(date('Y-m-d', strtotime('-30 day')), date('Y-m-d')))) {
                    $value = $this->l('No orders', null, null, false);
                } else {
                    $country = new Country($row['id_country'], $this->context->language->id);
                    $value = sprintf($this->l('%d%% %s', null, null, false), $row['orders'], $country->name);
                }
                ConfigurationKPI::updateValue('MAIN_COUNTRY', array($this->context->language->id => $value));
                ConfigurationKPI::updateValue('MAIN_COUNTRY_EXPIRE', array($this->context->language->id => strtotime('+1 day')));
                break;
            case 'orders_per_customer':
                $value = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
				SELECT COUNT(*)
				FROM `' . _DB_PREFIX_ . 'customer` c
				WHERE active = 1
				' . Shop::addSqlRestriction());
                if ($value) {
                    $orders = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
					SELECT COUNT(*)
					FROM `' . _DB_PREFIX_ . 'orders` o
					WHERE valid = 1
					' . Shop::addSqlRestriction());
                    $value = round($orders / $value, 2);
                }
                ConfigurationKPI::updateValue('ORDERS_PER_CUSTOMER', $value);
                ConfigurationKPI::updateValue('ORDERS_PER_CUSTOMER_EXPIRE', strtotime('+1 day'));
                break;
            case 'average_order_value':
                $row = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow('
				SELECT
					COUNT(`id_order`) as orders,
					SUM(`total_paid_tax_excl` / `conversion_rate`) as total_paid_tax_excl
				FROM `' . _DB_PREFIX_ . 'orders`
				WHERE `invoice_date` BETWEEN "' . pSQL(date('Y-m-d', strtotime('-31 day'))) . ' 00:00:00" AND "' . pSQL(date('Y-m-d', strtotime('-1 day'))) . ' 23:59:59"
				' . Shop::addSqlRestriction());
                $value = Tools::displayPrice($row['orders'] ? $row['total_paid_tax_excl'] / $row['orders'] : 0, $currency);
                ConfigurationKPI::updateValue('AVG_ORDER_VALUE', $value);
                ConfigurationKPI::updateValue('AVG_ORDER_VALUE_EXPIRE', strtotime(date('Y-m-d 00:00:00', strtotime('+1 day'))));
                break;
            case 'netprofit_visitor':
                $date_from = date('Y-m-d', strtotime('-31 day'));
                $date_to = date('Y-m-d', strtotime('-1 day'));
                $total_visitors = AdminStatsController::getVisits(true, $date_from, $date_to);
                $net_profits = AdminStatsController::getTotalSales($date_from, $date_to);
                $net_profits -= AdminStatsController::getExpenses($date_from, $date_to);
                $net_profits -= AdminStatsController::getPurchases($date_from, $date_to);
                if ($total_visitors) {
                    $value = Tools::displayPrice($net_profits / $total_visitors, $currency);
                } elseif ($net_profits) {
                    $value = '&infin;';
                } else {
                    $value = Tools::displayPrice(0, $currency);
                }
                ConfigurationKPI::updateValue('NETPROFIT_VISITOR', $value);
                ConfigurationKPI::updateValue('NETPROFIT_VISITOR_EXPIRE', strtotime(date('Y-m-d 00:00:00', strtotime('+1 day'))));
                break;
            case 'products_per_category':
                $products = AdminStatsController::getTotalProducts();
                $categories = AdminStatsController::getTotalCategories();
                $value = round($products / $categories);
                ConfigurationKPI::updateValue('PRODUCTS_PER_CATEGORY', $value);
                ConfigurationKPI::updateValue('PRODUCTS_PER_CATEGORY_EXPIRE', strtotime('+1 hour'));
                break;
            case 'top_category':
                if (!($id_category = AdminStatsController::getBestCategory(date('Y-m-d', strtotime('-1 month')), date('Y-m-d')))) {
                    $value = $this->l('No category', null, null, false);
                } else {
                    $category = new Category($id_category, $this->context->language->id);
                    $value = $category->name;
                }
                ConfigurationKPI::updateValue('TOP_CATEGORY', array($this->context->language->id => $value));
                ConfigurationKPI::updateValue('TOP_CATEGORY_EXPIRE', array($this->context->language->id => strtotime('+1 day')));
                break;
            default:
                $value = false;
        }
        if ($value !== false) {
            $array = array('value' => $value);
            if (isset($data)) {
                $array['data'] = $data;
            }
            die(Tools::jsonEncode($array));
        }
        die(Tools::jsonEncode(array('has_errors' => true)));
    }