<?php

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

function upgrade_module_1_24_0($module)
{
    if (!createFaqLangTable()) {
        return false;
    }

    if (!migrateFaqFieldsToLangTable()) {
        return false;
    }

    return dropFaqLangColumns();
}

function createFaqLangTable(): bool
{
    return Db::getInstance()->execute(
        'CREATE TABLE IF NOT EXISTS `' . _DB_PREFIX_ . 'ws_customhtml_faq_lang` (
            `id_ws_customhtml_faq` INT(11) NOT NULL,
            `id_lang` INT(11) NOT NULL,
            `question` VARCHAR(512) NOT NULL DEFAULT \'\',
            `answer` TEXT,
            PRIMARY KEY (`id_ws_customhtml_faq`, `id_lang`)
        );'
    );
}

function migrateFaqFieldsToLangTable(): bool
{
    $columns = Db::getInstance()->executeS(
        'SHOW COLUMNS FROM `' . _DB_PREFIX_ . 'ws_customhtml_faq` LIKE \'question\''
    );

    if (empty($columns)) {
        // Already migrated in a previous run of this upgrade.
        return true;
    }

    $faqs = Db::getInstance()->executeS(
        'SELECT `id_ws_customhtml_faq`, `question`, `answer`
         FROM `' . _DB_PREFIX_ . 'ws_customhtml_faq`'
    );
    $languages = Language::getLanguages(false);

    foreach ($faqs as $faq) {
        foreach ($languages as $language) {
            $existing = Db::getInstance()->executeS(
                'SELECT 1 FROM `' . _DB_PREFIX_ . 'ws_customhtml_faq_lang`
                 WHERE `id_ws_customhtml_faq` = ' . (int) $faq['id_ws_customhtml_faq'] . '
                 AND `id_lang` = ' . (int) $language['id_lang']
            );

            if (!empty($existing)) {
                continue;
            }

            $result = Db::getInstance()->insert('ws_customhtml_faq_lang', [
                'id_ws_customhtml_faq' => (int) $faq['id_ws_customhtml_faq'],
                'id_lang'              => (int) $language['id_lang'],
                'question'             => pSQL($faq['question']),
                'answer'               => pSQL($faq['answer'], true),
            ]);

            if (!$result) {
                return false;
            }
        }
    }

    return true;
}

function dropFaqLangColumns(): bool
{
    $columns = Db::getInstance()->executeS(
        'SHOW COLUMNS FROM `' . _DB_PREFIX_ . 'ws_customhtml_faq` LIKE \'question\''
    );

    if (empty($columns)) {
        return true;
    }

    return Db::getInstance()->execute(
        'ALTER TABLE `' . _DB_PREFIX_ . 'ws_customhtml_faq`
         DROP COLUMN `question`,
         DROP COLUMN `answer`'
    );
}