<?php

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

function upgrade_module_1_22_0($module)
{
    if (!addLinkColumnToLangTable()) {
        return false;
    }

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

    return dropBlockLinkColumn();
}

function addLinkColumnToLangTable(): bool
{
    $existing = Db::getInstance()->executeS(
        'SHOW COLUMNS FROM `' . _DB_PREFIX_ . 'ws_customhtml_lang` LIKE \'link\''
    );

    if (!empty($existing)) {
        return true;
    }

    return Db::getInstance()->execute(
        'ALTER TABLE `' . _DB_PREFIX_ . 'ws_customhtml_lang`
         ADD COLUMN `link` VARCHAR(512) NOT NULL DEFAULT \'\' AFTER `extra_description`'
    );
}

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

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

    $blocks = Db::getInstance()->executeS(
        'SELECT `id_ws_customhtml`, `link` FROM `' . _DB_PREFIX_ . 'ws_customhtml`'
    );

    foreach ($blocks as $block) {
        $result = Db::getInstance()->update(
            'ws_customhtml_lang',
            ['link' => pSQL($block['link'])],
            '`id_ws_customhtml` = ' . (int) $block['id_ws_customhtml']
        );

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

    return true;
}

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

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

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