<?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 version 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.
 *
 * @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 version 3.0
 */

namespace PrestaShop\Module\LinkList;

use Configuration;
use Db;
use Hook;
use Language;
use PrestaShop\Module\LinkList\Model\LinkBlock;

/**
 * Class used to migrate data from the 1.6 module
 */
class DataMigration
{
    /**
     * @var Db
     */
    private $db;

    public function __construct(Db $db)
    {
        $this->db = $db;
    }

    /**
     * Retrieve content from 1.6 module, then cleanup
     */
    public function migrateData()
    {
        // Copy first table
        $this->db->execute(
            'INSERT INTO `' . _DB_PREFIX_ . 'link_block`
            (`id_link_block`, `id_hook`, `position`)
            SELECT `id_cms_block`, `location`, `position`
            FROM `' . _DB_PREFIX_ . 'cms_block`'
        );
        // Update hook IDs (Got from BlockCMSModel in 1.6 module)
        $relationBetweenOldLocationsAndHooks = [
            0 => 'displayLeftColumn', // LEFT_COLUMN
            1 => 'displayRightColumn', // RIGHT_COLUMN
            2 => 'displayFooter', // FOOTER
        ];
        foreach ($relationBetweenOldLocationsAndHooks as $oldLocation => $newHookLocation) {
            // Retrieve the cms page IDs linked in the old module
            $content = $this->generateJsonForBlockContent([
                'cms' => $this->getCmsIdsFromBlock($oldLocation),
            ]);

            $this->db->execute(
                'UPDATE `' . _DB_PREFIX_ . 'link_block`
                SET `id_hook` = ' . (int) Hook::getIdByName($newHookLocation) . ",
                `content` = '" . pSQL($content) . "'
                WHERE `id_hook` = " . $oldLocation
            );
        }
        // Copy second table (lang)
        $this->db->execute(
            'INSERT INTO `' . _DB_PREFIX_ . 'link_block_lang`
            (`id_link_block`, `id_lang`, `name`)
            SELECT `id_cms_block`, `id_lang`, `name`
            FROM `' . _DB_PREFIX_ . 'cms_block_lang`'
        );
        // Copy third table (shop)
        $this->db->execute(
            'INSERT INTO `' . _DB_PREFIX_ . 'link_block_shop`
            (`id_link_block`, `id_shop`)
            SELECT `id_cms_block`, `id_shop`
            FROM `' . _DB_PREFIX_ . 'cms_block_shop`'
        );

        $this->migrateBlockFooter();

        // Drop old tables
        $this->db->execute(
            'DROP TABLE `' . _DB_PREFIX_ . 'cms_block`,
            `' . _DB_PREFIX_ . 'cms_block_lang`,
            `' . _DB_PREFIX_ . 'cms_block_page`,
            `' . _DB_PREFIX_ . 'cms_block_shop`'
        );
    }

    private function migrateBlockFooter()
    {
        if (!Configuration::get('FOOTER_BLOCK_ACTIVATION')) {
            return;
        }

        $linkBlock = new LinkBlock();
        $data = [];
        $footerCMS = Configuration::get('FOOTER_CMS');
        if (!empty($footerCMS)) {
            foreach (explode('|', $footerCMS) as $val) {
                list(, $cmsId) = explode('_', $val);
                $data['cms'][] = $cmsId;
            }
        }
        if (Configuration::get('FOOTER_PRICE-DROP')) {
            $data['product'][] = 'prices-drop';
        }
        if (Configuration::get('FOOTER_NEW-PRODUCTS')) {
            $data['product'][] = 'new-products';
        }
        if (Configuration::get('FOOTER_BEST-SALES')) {
            $data['product'][] = 'best-sales';
        }
        if (Configuration::get('FOOTER_CONTACT')) {
            $data['static'][] = 'contact';
        }
        if (Configuration::get('FOOTER_SITEMAP')) {
            $data['static'][] = 'sitemap';
        }
        if (Configuration::get('PS_STORES_DISPLAY_FOOTER')) {
            $data['static'][] = 'stores';
        }
        $linkBlock->content = $this->generateJsonForBlockContent($data);
        $linkBlock->id_hook = (int) Hook::getIdByName('displayFooter');

        $languages = Language::getLanguages(false);
        foreach ($languages as $lang) {
            $linkBlock->name[$lang['id_lang']] = 'Footer content (Migrated)';
            $linkBlock->custom_content[$lang['id_lang']] = json_encode([[
                'title' => Configuration::get('FOOTER_CMS_TEXT_' . $lang['id_lang']),
                'url' => '#',
            ]]);
        }
        $linkBlock->save();
    }

    /**
     * Generate a JSON for the column `content` of link_block
     *
     * @param array $data
     *
     * @return string
     */
    private function generateJsonForBlockContent(array $data)
    {
        return json_encode([
            'cms' => empty($data['cms']) ? [false] : $data['cms'],
            'static' => empty($data['static']) ? [false] : $data['static'],
            'product' => empty($data['product']) ? [false] : $data['product'],
        ]);
    }

    /**
     * Get list of cms IDs from database for a given old cms_block_page
     *
     * @param int $oldLocation
     *
     * @return array
     */
    private function getCmsIdsFromBlock($oldLocation)
    {
        $request = $this->db->executeS(
            'SELECT id_cms FROM  `' . _DB_PREFIX_ . 'cms_block_page`
            WHERE id_cms_block = ' . (int) $oldLocation . '
            AND is_category = 0'
        );

        $ids = [];
        foreach ($request as $row) {
            $ids[] = $row['id_cms'];
        }

        return $ids;
    }
}