using Microsoft.AspNetCore.Hosting.Server;
using Microsoft.AspNetCore.Hosting.Server.Features;
using Microsoft.AspNetCore.SignalR.Client;
using Microsoft.Extensions.Configuration;
using System.Net;
using System.Net.NetworkInformation;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Web;
using TEAMModelOS.SDK;
using TEAMModelOS.SDK.Extension;

namespace HTEX.ScreenClient.Services
{
    public class SignalRClientHub : BackgroundService, IDisposable
    {
        private readonly IConfiguration _configuration; 
        private readonly ILogger<SignalRClientHub> _logger;
        private readonly IHttpClientFactory _httpClientFactory;
        private readonly IServiceProvider _services;
        private IEnumerable<string>? _url = new List<string>();
        public SignalRClientHub(IConfiguration configuration,ILogger<SignalRClientHub> logger,IHttpClientFactory httpClientFactory, IServiceProvider services,IHostApplicationLifetime lifetime) 
        {
                
            _configuration=configuration;
            _logger=logger;
            _httpClientFactory=httpClientFactory;
            _services=services;
            lifetime.ApplicationStarted.Register(() => {
                var server = _services.GetService<IServer>();
                _url = server?.Features.Get<IServerAddressesFeature>()?.Addresses;
            });
        }
        private List<string> messages = new List<string>();
        protected async override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            var device =  await GetClientInfo();
            string hashData = $"{device.name}-{device.remote}-{device.port}-{device.os}-{string.Join(",",device.networks.Select(x=>$"{x.mac}-{x.ip}"))}";
            string clientid =  ShaHashHelper.GetSHA256(hashData);
            string? CenterUrl = _configuration.GetSection("ScreenClient:CenterUrl").Value;
            string? ScreenUrl = _configuration.GetSection("ScreenClient:ScreenUrl").Value;
            long Timeout = _configuration.GetValue<long>("ScreenClient:Timeout");
            long Delay = _configuration.GetValue<long>("ScreenClient:Delay");
            device.timeout = Timeout;
            device.delay = Delay;
            device.screenUrl = ScreenUrl;
            HubConnection hubConnection = new HubConnectionBuilder()
               .WithUrl($"{CenterUrl}/signalr/screen?grant_type=bookjs_api&clientid={clientid}&device={HttpUtility.UrlEncode(device.ToJsonString(),Encoding.Unicode)}") //only one slash
               .WithAutomaticReconnect()
               .ConfigureLogging(logging =>
               {
                   logging.SetMinimumLevel(LogLevel.Information);
                   logging.AddConsole();
               })
               .Build();
            hubConnection.On<JsonElement>("ReceiveConnection", ( message) =>
            {
                var encodedMsg = $" {message}";
                _logger.LogInformation($"连接成功：{message.ToJsonString()}");
                messages.Add(encodedMsg);
            });
            hubConnection.On<JsonElement>("ReceiveMessage", (message) =>
            {
                var encodedMsg = $"{message}";
                messages.Add(encodedMsg);
            });
            
            await hubConnection.StartAsync();
        }
         
        public async Task<ClientDevice> GetClientInfo()
        {
            string hostName =$"{Environment.UserName}-{Dns.GetHostName()}" ;
            string os = RuntimeInformation.OSDescription;
            //获取当前客户端的服务端口
            var _httpClient = _httpClientFactory.CreateClient();
            ClientDevice device = new ClientDevice { name =hostName, os= os };
            HttpResponseMessage message = await _httpClient.PostAsJsonAsync("https://www.teammodel.cn/core/system-info", new { });
            if (message.IsSuccessStatusCode)
            {
                JsonNode? json = JsonSerializer.Deserialize<JsonNode>(await message.Content.ReadAsStringAsync());
                var ip =  json?["ip"];
                var region = json?["region"];
                _logger.LogInformation($"远程地址：{ip}");
                _logger.LogInformation($"所属地区：{region}");
                device.remote=ip?.ToString();
                device.region=region?.ToString();
            }
            _logger.LogInformation($"计算机名：{hostName}");
            _logger.LogInformation($"系统名称：{RuntimeInformation.OSDescription}");
           
            var nics = NetworkInterface.GetAllNetworkInterfaces();
            foreach (var nic in nics)
            {
                if (nic.OperationalStatus == OperationalStatus.Up)
                {
                    var mac = nic.GetPhysicalAddress().ToString();
                    var properties = nic.GetIPProperties();
                    var unicastAddresses = properties.UnicastAddresses;
                    foreach (var unicast in unicastAddresses)
                    {
                        if (unicast.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
                        {
                            var ip = unicast.Address.ToString();
                            Network network= new Network() { mac=mac, ip=ip };
                            if (!string.IsNullOrWhiteSpace(mac.ToString()))
                            {
                                device.networks.Add(network);
                                _logger.LogInformation($"网卡地址: {mac}");
                                _logger.LogInformation($"内网地址: {ip}");
                            }
                        }
                    }
                }
            }
            if (_url!=null) 
            {
                List<int> ports = new List<int>();
                foreach (var url in _url)
                {
                    Uri uri = new Uri(url);
                    ports.Add(uri.Port);
                }
                device.port= string.Join(",", ports);
                _logger.LogInformation($"占用端口: {device.port}");
            }
            return device ;
        }
       
    }
}