<?php

namespace App\Http\Controllers\Customer;

use App\Http\Controllers\Controller;
use App\Models\Customer;
use App\Services\ChatWebhookService;
use Illuminate\Support\Facades\Http;

class ChatController extends Controller
{
    public function StartSupportChat()
    {
        $user = Customer::findOrFail(auth('customer')->id());

        $chatApi = self::Config('chat_api');
        $chatApiKey = self::Config('chat_api_key');

        if (!$chatApi || !$chatApiKey) {
            return response()->json([
                'message' => 'تنظیمات گفتگو تنظیم نشده است.',
            ], 422);
        }

        $host = preg_replace('#^https?://#', '', rtrim((string) $chatApi, '/'));
        $userChatId = !empty($user->chat_user_id)
            ? (string) $user->chat_user_id
            : 'user_'.$user->id;

        app(ChatWebhookService::class)->ensureRegistered();

        if (!empty($user->chat_room_id)) {
            if ($this->chatRoomIsAccessible($host, (string) $chatApiKey, (string) $user->chat_room_id, $userChatId)) {
                if (empty($user->chat_user_id) || $user->chat_user_id !== $userChatId) {
                    $user->chat_user_id = $userChatId;
                    $user->save();
                }

                return response()->json([
                    'message' => 'چت از قبل ساخته شده',
                    'user' => $user,
                ]);
            }

            // روم در سرویس چت نامعتبر/بدون عضویت است — از نو می‌سازیم
            $user->chat_room_id = null;
            $user->chat_user_id = null;
            $user->save();
        }

        $url = 'https://'.$host.'/api/rooms/create';

        try {
            $response = Http::timeout(12)->post($url, [
                'api_key' => $chatApiKey,
                'name' => $user->name,
                'type' => 'SUPPORT',
                'members' => [
                    'admin',
                    $userChatId,
                ],
            ]);

            if (!$response->successful()) {
                return response()->json([
                    'message' => $response->body(),
                    'url' => $url,
                ], 422);
            }

            $data = $response->json();
            $user->chat_room_id = $data['room_id'] ?? null;
            $user->chat_user_id = $userChatId;
            $user->save();

            return response()->json([
                'message' => 'چت ساخته شد',
                'user' => $user,
            ]);
        } catch (\Exception $exception) {
            return response()->json([
                'message' => $exception->getMessage(),
            ], 422);
        }
    }

    private function chatRoomIsAccessible(
        string $host,
        string $apiKey,
        string $roomId,
        string $userChatId
    ): bool {
        if ($host === '' || $apiKey === '' || $roomId === '' || $userChatId === '') {
            return false;
        }

        try {
            $response = Http::timeout(8)->acceptJson()->get('https://'.$host.'/api/messages', [
                'api_key' => $apiKey,
                'room_id' => $roomId,
                'user_id' => $userChatId,
                'limit' => 1,
                'offset' => 0,
            ]);

            return $response->successful();
        } catch (\Throwable $e) {
            return false;
        }
    }
}