<?php

namespace App\Jobs;

use App\Enums\RoomStateChange;
use App\Events\RoomStateChanged;
use App\Models\Room;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Queue\Queueable;
use Illuminate\Support\Facades\DB;

class CloseInactiveRooms implements ShouldQueue
{
    use Queueable;

    public function handle(): void
    {
        $closedAt = now()->toImmutable();
        $guestCutoff = $closedAt->subDays(config('rooms.guest_retention_days'));
        $accountCutoff = $closedAt->subDays(config('rooms.account_retention_days'));

        Room::query()
            ->whereNull('closed_at')
            ->where('is_persistent', false)
            ->where(function ($query) use ($guestCutoff, $accountCutoff): void {
                $query
                    ->where(function ($query) use ($guestCutoff): void {
                        $query->whereNull('owner_id')
                            ->where('last_activity_at', '<=', $guestCutoff);
                    })
                    ->orWhere(function ($query) use ($accountCutoff): void {
                        $query->whereNotNull('owner_id')
                            ->where('last_activity_at', '<=', $accountCutoff);
                    });
            })
            ->select('id')
            ->chunkById(100, function ($rooms) use ($closedAt, $guestCutoff, $accountCutoff): void {
                foreach ($rooms->pluck('id') as $roomId) {
                    $stateVersion = DB::transaction(function () use ($roomId, $closedAt, $guestCutoff, $accountCutoff): ?int {
                        $room = Room::query()
                            ->lockForUpdate()
                            ->find((string) $roomId);

                        if (
                            $room === null
                            || $room->isClosed()
                            || $room->is_persistent
                            || $room->last_activity_at === null
                        ) {
                            return null;
                        }

                        $cutoff = $room->owner_id === null
                            ? $guestCutoff
                            : $accountCutoff;

                        if ($room->last_activity_at->greaterThan($cutoff)) {
                            return null;
                        }

                        $room->update([
                            'closed_at' => $closedAt,
                            'state_version' => $room->state_version + 1,
                        ]);

                        return $room->state_version;
                    });

                    if ($stateVersion !== null) {
                        RoomStateChanged::dispatch(
                            (string) $roomId,
                            $stateVersion,
                            RoomStateChange::RoomClosed,
                        );
                    }
                }
            }, 'id');
    }
}