using Microsoft.AspNetCore.SignalR;
using Microsoft.AspNetCore.SignalR.Client;
using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Web;
using TEAMModelOS.SDK;
using TEAMModelOS.SDK.DI;
using TEAMModelOS.SDK.DI.Device;
using TEAMModelOS.SDK.Extension;
using static Azure.Core.HttpHeader;

namespace IESHybridCloud.Services
{
    public class SignalRIESHybridClientHub : BackgroundService, IDisposable
    {
        private readonly IConfiguration _configuration;
        private readonly ILogger<SignalRIESHybridClientHub> _logger;
        private TEAMModelOS.SDK.HybridClient? device;
        private readonly CoreDevice _device;
        private readonly IHttpClientFactory _httpClientFactory;
        private readonly BackgroundWorkerQueue _backgroundWorkerQueue;
        private readonly AzureSignalRFactory _azureSignalRFactory;
        public SignalRIESHybridClientHub(AzureSignalRFactory azureSignalRFactory,BackgroundWorkerQueue backgroundWorkerQueue, IConfiguration configuration, ILogger<SignalRIESHybridClientHub> logger, IHttpClientFactory httpClientFactory, CoreDevice device)
        {

            _configuration=configuration;
            _logger=logger;
            _httpClientFactory=httpClientFactory;
            _device = device;
            _backgroundWorkerQueue=backgroundWorkerQueue;
            _azureSignalRFactory=azureSignalRFactory;
        }
        protected async override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            var coreDevice = await _device.GetCoreDevice();
            device=coreDevice.ToJsonString().ToObject<TEAMModelOS.SDK.HybridClient>();
            string clientid = device.deviceId!;
            string? CenterUrl = _configuration.GetSection("HybridClient:CenterUrl").Value;
            long Timeout = _configuration.GetValue<long>("HybridClient:Timeout");
            long Delay = _configuration.GetValue<long>("HybridClient:Delay");
            device.timeout = Timeout;
            device.delay = Delay;
            await StartHubConnectionAsync(clientid, CenterUrl);
        }
        private async Task StartHubConnectionAsync(string clientid, string? CenterUrl)
        { 
            
            //重写重连策略，防止服务端更新，断线后，客户端达到最大连接次数，依然连线不上服务端。
            var reconnectPolicy = new ExponentialBackoffReconnectPolicy(TimeSpan.FromSeconds(10), _logger); // 尝试重连的最大次数，这里使用 int.MaxValue 表示无限次
            reconnectPolicy.MaxRetryCount = int.MaxValue;
           
         
            //HubConnection hubConnection = new HubConnectionBuilder()
            //   .WithUrl($"https://localhost:5001/hub/hybrid-cloud?grant_type={HybridConstant.grant_type}&clientid={clientid}&device={HttpUtility.UrlEncode(device.ToJsonString(), Encoding.Unicode)}") //only one slash
            //   .WithAutomaticReconnect(reconnectPolicy)
            //   .ConfigureLogging(logging =>
            //   {
            //       logging.SetMinimumLevel(LogLevel.Information);
            //       logging.AddConsole();
            //   })
            //   .Build();

            


            try
            {
                //hubConnection.On<ConnectionMessage>("ReceiveConnection", (message) =>
                //{
                //    _logger.LogInformation($"连接成功：{message.ToJsonString()}");
                //    //重置重连次数。
                //    reconnectPolicy.Reset();
                //});
                //hubConnection.On<JsonElement>("ReceiveMessage", async (message) =>
                //{
                //    {
                //        _logger.LogInformation($"获得推送数据，{message.ToJsonString()}");
                //    }
                //});ieshybridcloudhub
                //await hubConnection.StartAsync();
                var hub = _azureSignalRFactory.GetServiceManager().GetHubContext($"/ieshybridcloudhub");
                await hub.Clients.User(device.deviceId).SendCoreAsync("ReceiveMessage", new[]{new {
                                connectionId = "1",
                                to = "2",
                                groupname ="3",
                                sender = device.deviceId,
                                text = device.ToJsonString()
                            }});
            }
            catch (Exception ex)
            {
                _logger.LogError("初次启动连接SignalR失败，等待重连......");
                int retryCount = 0;
                const int maxRetries = 360;
                const int retryDelaySeconds = 10;
                while (retryCount < maxRetries)
                {
                    try
                    {
                        await Task.Delay(retryDelaySeconds * 1000); // 等待一段时间后重试  
                       // await hubConnection.StartAsync();
                        _logger.LogInformation("SignalR连接成功（重试后）！");
                        break; // 连接成功，退出循环  
                    }
                    catch (Exception retryEx)
                    {
                        retryCount++;
                        _logger.LogInformation($"SignalR连接重试失败: {retryEx.Message}。重试次数: {retryCount}/{maxRetries}");
                        // 可以在这里决定是否因为某种原因停止重试  
                        if (retryCount == maxRetries)
                        {
                            _logger.LogInformation("达到最大重试次数，停止重试。");
                            break;
                        }
                    }
                }
            }
        }
        public async Task<(int status, string msg, JsonNode? data)> ReceiveMessage(JsonNode data) 
        {
            int status = 0;
            string msg = string.Empty;
             _backgroundWorkerQueue.QueueBackgroundWorkItem(async task =>
            {
               var pk= data["pk"];
            });
            return (status, msg, data);

        }
    }
    public class ExponentialBackoffReconnectPolicy : IRetryPolicy
    {
        private readonly TimeSpan _retryInterval;

        private int _retryCount;
        public int MaxRetryCount { get; set; } = int.MaxValue;
        public readonly ILogger<SignalRIESHybridClientHub> _logger;
        public ExponentialBackoffReconnectPolicy(TimeSpan retryInterval, ILogger<SignalRIESHybridClientHub> logger)
        {
            _retryInterval = retryInterval;
            _retryCount = 0;
            _logger = logger;
        }

        public TimeSpan? NextRetryDelay(RetryContext retryContext)
        {
            _logger.LogInformation($"重连次数: {_retryCount}");
            if (_retryCount < MaxRetryCount)
            {
                _retryCount++;
                // 计算下一次重连的延迟时间
                return _retryInterval;
            }
            return null; // 达到最大重连次数后不再重连
        }

        public void Reset()
        {
            _retryCount = 0;
        }
    }
}