<?php

declare(strict_types=0);

/**
 * vim:set softtabstop=4 shiftwidth=4 expandtab:
 *
 * LICENSE: GNU Affero General Public License, version 3 (AGPL-3.0-or-later)
 * Copyright Ampache.org, 2001-2024
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

namespace Ampache\Module\Api;

use Ampache\Module\Authorization\Access;
use Ampache\Config\AmpConfig;
use Ampache\Module\Authorization\AccessLevelEnum;
use Ampache\Module\Authorization\AccessTypeEnum;
use Ampache\Module\System\AmpError;
use Ampache\Repository\Model\Catalog;
use Ampache\Module\System\Core;
use Ampache\Module\Util\UiInterface;

final class SseApiApplication implements ApiApplicationInterface
{
    private UiInterface $ui;

    public function __construct(
        UiInterface $ui
    ) {
        $this->ui = $ui;
    }

    public function run(): void
    {
        if (!Access::check(AccessTypeEnum::INTERFACE, AccessLevelEnum::MANAGER)) {
            $this->ui->accessDenied();

            return;
        }
        if (AmpConfig::get('demo_mode')) {
            return;
        }

        ob_end_clean();
        set_time_limit(0);

        if (!array_key_exists('html', $_REQUEST)) {
            define('SSE_OUTPUT', true);
            header('Content-Type: text/event-stream; charset=utf-8');
            header('Cache-Control: no-cache');
        }

        $worker = $_REQUEST['worker'] ?? null;
        if (array_key_exists('options', $_REQUEST)) {
            $options = json_decode(urldecode($_REQUEST['options']), true);
        } else {
            $options = null;
        }

        if (array_key_exists('catalogs', $_REQUEST)) {
            $catalogs = array_map(
                'intval',
                (array)json_decode(urldecode($_REQUEST['catalogs']), true)
            );
        } else {
            $catalogs = null;
        }

        // Free the session write lock
        // Warning: Do not change any session variable after this call
        session_write_close();

        switch ($worker) {
            case 'catalog':
                if (defined('SSE_OUTPUT')) {
                    echo "data: toggleVisible('ajax-loading')\n\n";
                    ob_flush();
                    flush();
                }

                Catalog::process_action(Core::get_request('action'), $catalogs, $options);

                if (defined('SSE_OUTPUT')) {
                    echo "data: toggleVisible('ajax-loading')\n\n";
                    ob_flush();
                    flush();

                    echo "data: stop_sse_worker()\n\n";
                    ob_flush();
                    flush();
                } else {
                    echo AmpError::display('general');
                }

                break;
        }
    }
}
