<?php
/*
* 2007-2016 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  2007-2016 PrestaShop SA
*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

use PrestaShop\PrestaShop\Adapter\Image\ImageRetriever;
use PrestaShop\PrestaShop\Adapter\Product\PriceFormatter;
use PrestaShop\PrestaShop\Adapter\Product\ProductColorsRetriever;
use PrestaShop\PrestaShop\Core\Module\WidgetInterface;

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

class Ps_Specials extends Module implements WidgetInterface
{
    private $templateFile;

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

        $this->ps_versions_compliancy = [
            'min' => '8.1.0',
            'max' => _PS_VERSION_,
        ];

        $this->bootstrap = true;
        parent::__construct();

        $this->displayName = $this->trans('Specials block', [], 'Modules.Specials.Admin');
        $this->description = $this->trans('Provide information on your special offers in a specific block displayed on your homepage.', [], 'Modules.Specials.Admin');

        $this->templateFile = 'module:ps_specials/views/templates/hook/ps_specials.tpl';
    }

    public function install()
    {
        Configuration::updateValue('BLOCKSPECIALS_SPECIALS_NBR', 8);

        return parent::install() && $this->registerHook('displayHome');
    }

    public function uninstall()
    {
        return parent::uninstall();
    }

    public function getContent()
    {
        $output = '';

        if (Tools::isSubmit('submitSpecials')) {
            $nbr = Tools::getValue('BLOCKSPECIALS_SPECIALS_NBR');
            if (!Validate::isInt($nbr) || $nbr <= 0) {
                $errors = $this->trans('The number of products is invalid. Please enter a positive number.', [], 'Modules.Specials.Admin');
            }
            if (!empty($errors)) {
                $output = $this->displayError($errors);
            } else {
                Configuration::updateValue('BLOCKSPECIALS_SPECIALS_NBR', (int) Tools::getValue('BLOCKSPECIALS_SPECIALS_NBR'));

                $output .= $this->displayConfirmation($this->trans('The settings have been updated.', [], 'Admin.Notifications.Success'));
            }
        }

        return $output . $this->renderForm();
    }

    public function renderForm()
    {
        $fields_form = [
            'form' => [
                'legend' => [
                    'title' => $this->trans('Settings', [], 'Admin.Global'),
                    'icon' => 'icon-cogs',
                ],
                'input' => [
                    [
                        'type' => 'text',
                        'label' => $this->trans('Products to display', [], 'Modules.Specials.Admin'),
                        'name' => 'BLOCKSPECIALS_SPECIALS_NBR',
                        'class' => 'fixed-width-xs',
                        'desc' => $this->trans('Define the number of products to be displayed in this block on home page.', [], 'Modules.Specials.Admin'),
                    ],
                ],
                'submit' => [
                    'title' => $this->trans('Save', [], 'Admin.Actions'),
                ],
            ],
        ];

        $lang = new Language((int) Configuration::get('PS_LANG_DEFAULT'));

        $helper = new HelperForm();
        $helper->show_toolbar = false;
        $helper->table = $this->table;
        $helper->default_form_language = $lang->id;
        $helper->allow_employee_form_lang = Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') ? Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG') : 0;
        $helper->identifier = $this->identifier;
        $helper->submit_action = 'submitSpecials';
        $helper->currentIndex = $this->context->link->getAdminLink('AdminModules', false) .
            '&configure=' . $this->name .
            '&tab_module=' . $this->tab .
            '&module_name=' . $this->name;
        $helper->token = Tools::getAdminTokenLite('AdminModules');
        $helper->tpl_vars = [
            'fields_value' => [
                'BLOCKSPECIALS_SPECIALS_NBR' => Tools::getValue('BLOCKSPECIALS_SPECIALS_NBR', Configuration::get('BLOCKSPECIALS_SPECIALS_NBR')),
            ],
            'languages' => $this->context->controller->getLanguages(),
            'id_language' => $this->context->language->id,
        ];

        return $helper->generateForm([$fields_form]);
    }

    public function renderWidget($hookName = null, array $configuration = [])
    {
        $variables = $this->getWidgetVariables($hookName, $configuration);

        if (empty($variables)) {
            return false;
        }

        $this->smarty->assign($variables);

        return $this->fetch($this->templateFile);
    }

    public function getWidgetVariables($hookName = null, array $configuration = [])
    {
        $products = $this->getSpecialProducts();

        if (!empty($products)) {
            return [
                'products' => $products,
                'allSpecialProductsLink' => Context::getContext()->link->getPageLink('prices-drop'),
            ];
        }

        return false;
    }

    private function getSpecialProducts()
    {
        $products = Product::getPricesDrop(
            (int) Context::getContext()->language->id,
            0,
            (int) Configuration::get('BLOCKSPECIALS_SPECIALS_NBR'),
            false,
            'date_add',
            'DESC'
        );

        $assembler = new ProductAssembler($this->context);

        $presenterFactory = new ProductPresenterFactory($this->context);
        $presentationSettings = $presenterFactory->getPresentationSettings();
        $presenter = new PrestaShop\PrestaShop\Adapter\Presenter\Product\ProductListingPresenter(
            new ImageRetriever(
                $this->context->link
            ),
            $this->context->link,
            new PriceFormatter(),
            new ProductColorsRetriever(),
            $this->context->getTranslator()
        );

        // Now, we can present the products for the template.
        $products_for_template = [];

        if (is_array($products)) {
            // Assemble & present in bulk or separately, depending on core version
            $assembleInBulk = method_exists($assembler, 'assembleProducts');
            if ($assembleInBulk) {
                $products = $assembler->assembleProducts($products);
            }
            foreach ($products as $rawProduct) {
                $products_for_template[] = $presenter->present(
                    $presentationSettings,
                    $assembleInBulk ? $rawProduct : $assembler->assembleProduct($rawProduct),
                    $this->context->language
                );
            }
        }

        return $products_for_template;
    }
}