<?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: search/list existing Adobe meetings for the mod form.
 *
 * @package    mod_meetletacbfree
 * @copyright  2026 MeetLet
 * @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_multiple_structure;
use core_external\external_single_structure;
use core_external\external_value;
use mod_meetletacbfree\api\service;
use mod_meetletacbfree\local\config;
use moodle_exception;

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

/**
 * Return a short list of server meetings (latest / search).
 */
class search_server_meetings extends external_api {
    public static function execute_parameters(): external_function_parameters {
        return new external_function_parameters([
            'query' => new external_value(PARAM_TEXT, 'Search query', VALUE_DEFAULT, ''),
            'limit' => new external_value(PARAM_INT, 'Max results', VALUE_DEFAULT, 10),
            'courseid' => new external_value(PARAM_INT, 'Course id for capability check', VALUE_DEFAULT, 0),
        ]);
    }

    public static function execute(string $query = '', int $limit = 10, int $courseid = 0): array {
        $params = self::validate_parameters(self::execute_parameters(), [
            'query' => $query,
            'limit' => $limit,
            'courseid' => $courseid,
        ]);

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

        if (!empty($params['courseid'])) {
            $context = \context_course::instance((int)$params['courseid']);
        } else {
            $context = \context_system::instance();
        }
        self::validate_context($context);
        if (!has_capability('moodle/course:manageactivities', $context)
                && !has_capability('mod/meetletacbfree:addinstance', $context)) {
            throw new moodle_exception('nopermissions', 'error', '', 'search meetings');
        }

        if (!config::is_configured()) {
            throw new moodle_exception('notconfigured', 'meetletacbfree');
        }

        $limit = max(1, min(50, (int)$params['limit']));
        $service = new service();
        $service->login_admin();
        $rows = $service->list_server_meetings((string)$params['query'], $limit);
        $service->logout();

        $out = [];
        foreach ($rows as $m) {
            $label = $m->name;
            if (!empty($m->urlpath)) {
                $label .= ' (' . $m->urlpath . ')';
            }
            $out[] = [
                'scoid' => (int)$m->scoid,
                'name' => (string)$m->name,
                'label' => $label,
                'urlpath' => trim((string)$m->urlpath, '/'),
                'starttime' => !empty($m->datebegin) ? (int)strtotime((string)$m->datebegin) : 0,
                'endtime' => !empty($m->dateend) ? (int)strtotime((string)$m->dateend) : 0,
            ];
        }
        return ['meetings' => $out];
    }

    public static function execute_returns(): external_single_structure {
        return new external_single_structure([
            'meetings' => new external_multiple_structure(new external_single_structure([
                'scoid' => new external_value(PARAM_INT, 'SCO id'),
                'name' => new external_value(PARAM_TEXT, 'Meeting name'),
                'label' => new external_value(PARAM_TEXT, 'Select label'),
                'urlpath' => new external_value(PARAM_TEXT, 'URL path'),
                'starttime' => new external_value(PARAM_INT, 'Start unix time'),
                'endtime' => new external_value(PARAM_INT, 'End unix time'),
            ])),
        ]);
    }
}