using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Management;
using System.Net;
using System.Net.Http;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using Application.Models;
using Infrastructure.Extensions;
using Infrastructure.Models;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

namespace WinService
{
    public class WindowsService : IDisposable
    {
        private readonly IHostingEnvironment _env;
        private readonly IConfiguration _configuration;
        private readonly IHttpClientFactory _httpClientFactory;
        private readonly ILogger<WindowsService> _logger;
        private CancellationTokenSource _tokenSource;
        private static readonly object thisLock = new object();

        public WindowsService(IHostingEnvironment env, IConfiguration configuration, IHttpClientFactory httpClientFactory, ILogger<WindowsService> logger)
        {
            this._env = env;
            this._configuration = configuration;
            this._httpClientFactory = httpClientFactory;
            this._logger = logger;
        }

        public void Start()
        {
            this._tokenSource = new CancellationTokenSource();
            Task.Run(async () =>
            {
                while (!_tokenSource.IsCancellationRequested)
                {
                    try
                    {
                        Console.WriteLine("...");
                        Update(this.GetModel());
                    }
                    catch (Exception ex)
                    {
                        ex.PrintStack();
                    }
                    await Task.Delay(this._configuration.GetValue<int>("timer.seconds") * 1000);
                }
            });
        }

        public NotifyModel GetModel()
        {
            lock (thisLock)
            {
                var list = Search("select CSName,Caption,FreePhysicalMemory from Win32_OperatingSystem");
                var physicalMemory = double.Parse(Search("select Capacity from Win32_PhysicalMemory")["Capacity"].ToString());
                var cpu = int.Parse((Search("select PercentIdleTime from Win32_PerfFormattedData_PerfOS_Processor where Name='_Total'")["PercentIdleTime"].ToString()));
                var host = string.IsNullOrEmpty(this._configuration["server.ip"]) ? "localhost" : this._configuration["server.ip"];
                var prot = Convert.ToInt32(Regex.Match(this._configuration["server.urls"], @"(?<=:)\d+").Value);
                var timestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
                var model = new NotifyModel
                {
                    CategoryName = "WindowsPC",
                    CategoryNumber = "00",
                    Name = "主机",
                    Number = Helper.Instance.GetMacAddress(),
                    Icon = "pc",
                    IsOnline = true,
                    BaseUrl = $"http://{host}:{prot}/pc",
                    ApiPath = "/api"
                };
                model.Data.Add(new DataModel
                {
                    Type = DataValueType.Text.ToString(),
                    Key = "ip",
                    Name = "IP",
                    Value = host,
                    DisplayOrder = 1
                });
                model.Data.Add(new DataModel
                {
                    Type = DataValueType.Text.ToString(),
                    Key = "name",
                    Name = "计算机名",
                    Value = list["CSName"].ToString(),
                    DisplayOrder = 2
                });
                model.Data.Add(new DataModel
                {
                    Type = DataValueType.Text.ToString(),
                    Key = "os",
                    Name = "操作系统",
                    Value = list["Caption"].ToString(),
                    DisplayOrder = 3
                });
                model.Data.Add(new DataModel
                {
                    Key = "cpu",
                    Type = DataValueType.Int.ToString(),
                    Name = "CPU",
                    Value = (100 - cpu).ToString(),
                    Unit = "%",
                    DisplayOrder = 4
                });
                var freePhysicalMemory = double.Parse(list["FreePhysicalMemory"].ToString()) * 1024;
                var memoryUsage = (physicalMemory - freePhysicalMemory) / physicalMemory * 100;
                model.Data.Add(new DataModel
                {
                    Key = "memory",
                    Type = DataValueType.Int.ToString(),
                    Name = "内存",
                    Value = ((int)memoryUsage).ToString(),
                    Unit = "%",
                    Description = $"{((physicalMemory - freePhysicalMemory) / 1024 / 1024 / 1024.0).ToString("F1")}/{(physicalMemory / 1024 / 1024 / 1024.0).ToString("f1")} GB",
                    DisplayOrder = 5
                });
                var (send, received) = this.GetSpeed();
                model.Data.Add(new DataModel
                {
                    Key = "send",
                    Type = DataValueType.Text.ToString(),
                    Name = "发送",
                    Value = Math.Round(((double)send) / 1024.0, 1).ToString(),
                    Unit = "K/s",
                    DisplayOrder = 6
                });
                model.Data.Add(new DataModel
                {
                    Key = "received",
                    Type = DataValueType.Text.ToString(),
                    Name = "接收",
                    Value = Math.Round(((double)received) / 1024.0, 1).ToString(),
                    Unit = "K/s",
                    DisplayOrder = 7
                });
                return model;
            }
        }

        public void Update(NotifyModel model)
        {
            var url = $"http://{this._configuration["node.url"]}/Notify";
            Console.WriteLine(url);
            try
            {
                var hc = this._httpClientFactory.CreateClient();
                var task = this._httpClientFactory.CreateClient().PostAsync(url, new FormUrlEncodedContent(model.ToList()));
                task.Wait();
                using (var response = task.Result)
                {
                    using (var content = response.Content)
                    {
                        var value = content.ReadAsStringAsync().Result;
                        Console.WriteLine($"end:{url}:{value}");
                    }
                }
            }
            catch (Exception ex)
            {
                ex.PrintStack();
            }
        }

        public void Shutdown()
        {
            if (this._env.IsDevelopment())
            {
                Process.Start("mshta", "vbscript:msgbox(\"测试关机\",64,\"title\")(window.close)");
            }
            else
            {
                Process.Start("shutdown.exe", "-s -t 1");
            }
        }

        private (long send, long reveived) GetSpeed()
        {
            var send1 = 0L;
            var received1 = 0L;
            var interfaces = NetworkInterface.GetAllNetworkInterfaces();

            foreach (var ni in interfaces)
            {
                send1 += ni.GetIPStatistics().BytesSent;
                received1 += ni.GetIPStatistics().BytesReceived;
            }
            Thread.Sleep(1000);
            var send2 = 0L;
            var received2 = 0L;
            var interfaces2 = NetworkInterface.GetAllNetworkInterfaces();

            foreach (var ni in interfaces2)
            {
                send2 += ni.GetIPStatistics().BytesSent;
                received2 += ni.GetIPStatistics().BytesReceived;
            }
            return ((send2 - send1), (received2 - received1));
        }

        public static Dictionary<string, object> Search(string command)
        {
            var result = new Dictionary<string, object>();
            using (var mos = new ManagementObjectSearcher(command))
            {
                using (var molist = mos.Get())
                {
                    foreach (ManagementObject mo in molist)
                    {
                        foreach (var property in mo.Properties)
                        {
                            if (property.Value != null && !result.Any(o => o.Key == property.Name))
                            {
                                result.Add(property.Name, property.Value);
                            }
                        }
                    }
                }
            }

            return result;
        }

        public void Dispose()
        {
            Console.WriteLine("OnvifService dispose...");
            this._tokenSource.Cancel();
        }
    }
}