<?php

namespace App\Http\Controllers\admin;

use App\Constants\HttpStatus;
use App\Http\Controllers\Controller;
use App\Services\AdminRealtime\AdminRealtimeFeed;
use App\Services\AdminRealtime\AdminRealtimeTicket;
use App\Services\JwtService;
use Exception;
use Illuminate\Http\JsonResponse;

/** 后台订单、用户列表实时推送，接入说明见 docs/admin-websocket.md */
class Realtime extends Controller
{
    /** 后台登录态换取推送网关连接票据 */
    public function ticket(JwtService $jwtService): JsonResponse
    {
        try {
            if (!config('admin_realtime.enabled')) {
                throw new Exception('实时推送未启用');
            }
            $token = str_replace('Bearer ', '', (string) request()->header('Authorization'));
            $session = $jwtService->validateToken($token);
            $result = AdminRealtimeTicket::issue((int) request()->user->id, isset($session->exp) ? (int) $session->exp : null);
        } catch (Exception $e) {
            return $this->error(HttpStatus::CUSTOM_ERROR, $e->getMessage());
        }
        return $this->success($result);
    }

    /** 推送网关内部拉取事件，仅凭 X-Realtime-Secret 访问 */
    public function events(): JsonResponse
    {
        $secret = (string) config('admin_realtime.internal_secret');
        if ($secret === '' || !hash_equals($secret, (string) request()->header('X-Realtime-Secret'))) {
            return response()->json(['code' => HttpStatus::CUSTOM_ERROR, 'timestamp' => time(), 'msg' => 'forbidden', 'data' => []], 403);
        }
        if (!config('admin_realtime.enabled')) {
            return $this->error(HttpStatus::CUSTOM_ERROR, '实时推送未启用');
        }
        try {
            $gaps = array_filter(explode(',', (string) request()->input('gaps', '')), 'ctype_digit');
            $result = AdminRealtimeFeed::pull((int) request()->input('after', -1), $gaps);
        } catch (\Throwable $e) {
            return $this->error(HttpStatus::CUSTOM_ERROR, $e->getMessage());
        }
        return $this->success($result);
    }
}