<?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/>.

/**
 * Activity instance helpers.
 *
 * @package    mod_meetletacbmarketplace
 * @copyright  2026 MeetLet
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace mod_meetletacbmarketplace\local;

use cm_info;
use context_module;
use moodle_exception;
use stdClass;

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

/**
 * Load and resolve MeetLet instances.
 */
class instance {
    /** @var stdClass */
    public $record;
    /** @var stdClass */
    public $course;
    /** @var cm_info|stdClass */
    public $cm;
    /** @var context_module */
    public $context;
    /** @var int */
    public $groupid = 0;
    /** @var stdClass|null */
    public $meetingmap;

    public static function get_from_cmid(int $cmid, int $groupid = 0): self {
        list($course, $cm) = get_course_and_cm_from_cmid($cmid, 'meetletacbmarketplace');
        return self::from_cm($cm, $course, $groupid);
    }

    public static function get_from_instanceid(int $instanceid, int $groupid = 0): self {
        list($course, $cm) = get_course_and_cm_from_instance($instanceid, 'meetletacbmarketplace');
        return self::from_cm($cm, $course, $groupid);
    }

    protected static function from_cm($cm, $course, int $groupid): self {
        global $DB;
        $inst = new self();
        $inst->cm = $cm;
        $inst->course = $course;
        $inst->context = context_module::instance($cm->id);
        $inst->record = $DB->get_record('meetletacbmarketplace', ['id' => $cm->instance], '*', MUST_EXIST);
        $inst->groupid = $groupid;
        $inst->meetingmap = $DB->get_record('meetlet_marketplace_meetings', [
            'instanceid' => $inst->record->id,
            'groupid' => $groupid,
        ]);
        if (!$inst->meetingmap && $groupid !== 0) {
            // Fallback to no-group mapping.
            $inst->meetingmap = $DB->get_record('meetlet_marketplace_meetings', [
                'instanceid' => $inst->record->id,
                'groupid' => 0,
            ]);
        }
        return $inst;
    }

    public function meetingscoid(): int {
        return (int)($this->meetingmap->meetingscoid ?? 0);
    }

    public function require_meeting(): int {
        $scoid = $this->meetingscoid();
        if (!$scoid) {
            throw new moodle_exception('nomeeting', 'meetletacbmarketplace');
        }
        return $scoid;
    }

    public function auto_offline_enabled(): bool {
        return config::auto_offline_enabled($this->record);
    }
}