<?php

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

function upgrade_module_1_20_0($module)
{
    if (!createGroupLangTable()) {
        return false;
    }

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

    return dropGroupTitleColumn();
}

function createGroupLangTable(): bool
{
    return Db::getInstance()->execute(
        'CREATE TABLE IF NOT EXISTS `' . _DB_PREFIX_ . 'ws_customhtml_group_lang` (
            `id_ws_customhtml_group` INT(11) NOT NULL,
            `id_lang` INT(11) NOT NULL,
            `title` VARCHAR(256) NOT NULL DEFAULT \'\',
            PRIMARY KEY (`id_ws_customhtml_group`, `id_lang`)
        );'
    );
}

function migrateGroupTitlesToLangTable(): bool
{
    $groupColumns = Db::getInstance()->executeS(
        'SHOW COLUMNS FROM `' . _DB_PREFIX_ . 'ws_customhtml_group` LIKE \'title\''
    );

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

    $groups = Db::getInstance()->executeS(
        'SELECT `id_ws_customhtml_group`, `title` FROM `' . _DB_PREFIX_ . 'ws_customhtml_group`'
    );
    $languages = Language::getLanguages(false);

    foreach ($groups as $group) {
        foreach ($languages as $language) {
            $existing = Db::getInstance()->executeS(
                'SELECT 1 FROM `' . _DB_PREFIX_ . 'ws_customhtml_group_lang`
                 WHERE `id_ws_customhtml_group` = ' . (int) $group['id_ws_customhtml_group'] . '
                 AND `id_lang` = ' . (int) $language['id_lang']
            );

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

            $result = Db::getInstance()->insert('ws_customhtml_group_lang', [
                'id_ws_customhtml_group' => (int) $group['id_ws_customhtml_group'],
                'id_lang'                => (int) $language['id_lang'],
                'title'                  => pSQL($group['title']),
            ]);

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

    return true;
}

function dropGroupTitleColumn(): bool
{
    $groupColumns = Db::getInstance()->executeS(
        'SHOW COLUMNS FROM `' . _DB_PREFIX_ . 'ws_customhtml_group` LIKE \'title\''
    );

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

    return Db::getInstance()->execute(
        'ALTER TABLE `' . _DB_PREFIX_ . 'ws_customhtml_group` DROP COLUMN `title`'
    );
}