<?php

namespace App\Services\Rooms;

use App\Enums\RoomStateChange;
use App\Events\RoomStateChanged;
use App\Models\Room;
use Illuminate\Support\Facades\DB;

class RoomPermissionService
{
    public function __construct(
        private readonly RoomRealtimeStateService $realtimeState,
    ) {}

    public function updateParticipantControls(Room $room, bool $allowParticipantControls): void
    {
        [$stateVersion, $wasChanged] = DB::transaction(function () use ($room, $allowParticipantControls): array {
            $lockedRoom = Room::query()
                ->lockForUpdate()
                ->findOrFail($room->id);

            if ($lockedRoom->allow_participant_controls === $allowParticipantControls) {
                return [$lockedRoom->state_version, false];
            }

            $lockedRoom->update([
                'allow_participant_controls' => $allowParticipantControls,
                'last_activity_at' => now(),
                'state_version' => $lockedRoom->state_version + 1,
            ]);

            return [$lockedRoom->state_version, true];
        });

        if (! $wasChanged) {
            return;
        }

        RoomStateChanged::dispatch(
            $room->id,
            $stateVersion,
            RoomStateChange::PermissionsUpdated,
            $this->realtimeState->for($room),
        );
    }
}