<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Ajax: SSO URL to play or edit a recording in Adobe Connect.
 *
 * @package    mod_meetletacbfree
 * @copyright  2026 MeetLet <info@meetlet.net>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace mod_meetletacbfree\external;

use core_external\external_api;
use core_external\external_function_parameters;
use core_external\external_single_structure;
use core_external\external_value;
use mod_meetletacbfree\api\service;
use mod_meetletacbfree\local\config;
use mod_meetletacbfree\local\featureaccess;
use mod_meetletacbfree\local\instance;
use mod_meetletacbfree\local\roles;
use mod_meetletacbfree\local\sso;
use mod_meetletacbfree\local\usererror;
use moodle_exception;

defined('MOODLE_INTERNAL') || die();

/**
 * Prepare Adobe Connect recording play/edit URL with session for current user.
 */
class get_recording_launch_url extends external_api {
    public static function execute_parameters(): external_function_parameters {
        return new external_function_parameters([
            'cmid' => new external_value(PARAM_INT, 'Course module id'),
            'recordingscoid' => new external_value(PARAM_INT, 'Recording sco id'),
            'mode' => new external_value(PARAM_ALPHA, 'play or edit'),
            'groupid' => new external_value(PARAM_INT, 'Group id', VALUE_DEFAULT, 0),
        ]);
    }

    public static function execute(int $cmid, int $recordingscoid, string $mode, int $groupid = 0): array {
        global $DB, $USER;

        $params = self::validate_parameters(self::execute_parameters(), [
            'cmid' => $cmid,
            'recordingscoid' => $recordingscoid,
            'mode' => $mode,
            'groupid' => $groupid,
        ]);

        $mode = strtolower($params['mode']);
        if (!in_array($mode, ['play', 'edit'], true)) {
            throw new moodle_exception('error', 'meetletacbfree');
        }

        \mod_meetletacbfree\registration\manager::require_registered();

        $inst = instance::get_from_cmid($params['cmid'], $params['groupid']);
        self::validate_context($inst->context);
        require_capability('mod/meetletacbfree:view', $inst->context);
        featureaccess::require_feature(featureaccess::RECORDINGS, $inst->context, $inst->record);

        if ($mode === 'edit') {
            featureaccess::require_feature(featureaccess::ADOBEEDITOR, $inst->context, $inst->record);
        }

        $record = $DB->get_record('meetletacbfree_recordings', [
            'instanceid' => $inst->record->id,
            'recordingscoid' => $params['recordingscoid'],
        ]);
        if (!$record || empty($record->urlpath)) {
            throw new moodle_exception('norecordings', 'meetletacbfree');
        }

        try {
            // Prefer meeting role when available; fall back to view for play / host for edit.
            $adoberole = roles::resolve_adobe_role($inst->record, $inst->context, $USER->id);
            if ($mode === 'edit') {
                $permission = ($adoberole === service::ROLE_HOST || $adoberole === service::ROLE_PRESENTER)
                    ? $adoberole
                    : service::ROLE_HOST;
            } else {
                $permission = $adoberole ?: service::ROLE_PARTICIPANT;
            }

            $auth = sso::provision_and_login($USER, (int)$params['recordingscoid'], $permission);
            $url = $mode === 'edit'
                ? config::recording_editor_url((string)$record->urlpath, $auth['cookie'])
                : config::recording_play_url((string)$record->urlpath, $auth['cookie']);

            return usererror::ws_ok($url);
        } catch (\Throwable $e) {
            if ($e instanceof moodle_exception && in_array($e->errorcode, ['nopermissions', 'requirelogin', 'invalidparameter'], true)) {
                throw $e;
            }
            return usererror::ws_fail($e, $inst->context);
        }
    }

    public static function execute_returns(): external_single_structure {
        return new external_single_structure(usererror::ws_url_returns());
    }
}