using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Threading;
using System.Management;
using System.Runtime.InteropServices;
using System.Data;
using System.Data.SqlClient;
using System.DirectoryServices;
using System.Collections;
using System.Configuration;
using System.Collections.Specialized;
using System.IO;

namespace MON.Client
{
    public static class SysInfo
    {
        static Dictionary<string, PerformanceCounter> dic;
        static double DiskUsePercent;
        static double SysDiskUsePercent;
        static SysInfo()
        {
            try
            {
                dic = new Dictionary<string, PerformanceCounter>();
                foreach (string setting in ConfigurationManager.AppSettings)
                {
                    var arr = ConfigurationManager.AppSettings[setting].Split('#');
                    if (arr[arr.Length - 1] == "IsCounter")
                    {
                        try
                        {
                            var pc = new PerformanceCounter(arr[0], arr[1], arr[2]);
                            dic.Add(setting, pc);
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine(arr[0] + "找不到");
                            Log.WriteLog(ex.Message);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Log.WriteLog(ex.Message);
            }
        }
        static void initDiskInfo()
        {
            #region 备忘
            //只获取系统盘代码如下
            //ManagementObject CPANInfo = new ManagementObject(string.Format("win32_logicaldisk.deviceid=\"{0}\"", System.Environment.SystemDirectory.Substring(0, 2)));
            //CPANInfo.Get();
            //var s = Convert.ToDouble(CPANInfo["Size"]);
            //var l = Convert.ToDouble(CPANInfo["FreeSpace"]);
            //var d = (s - l) / s * 100;
            //return d;
            #endregion
            try
            {
                DriveInfo[] drives = DriveInfo.GetDrives();
                long totalSize = 0;
                long freeSize = 0;
                long CTotalSize = 0;
                long CFreeSize = 0;
                foreach (DriveInfo drive in drives)
                {
                    if (drive.DriveType == DriveType.CDRom)
                    {
                        continue;
                    }
                    totalSize += drive.TotalSize;
                    freeSize += drive.TotalFreeSpace;
                    if (drive.Name.StartsWith(System.Environment.SystemDirectory.Substring(0, 2)))
                    {
                        CTotalSize += drive.TotalSize;
                        CFreeSize += drive.TotalFreeSpace;
                    }
                }
                SysDiskUsePercent = (CTotalSize - CFreeSize) / (double)CTotalSize * 100;
                DiskUsePercent = (totalSize - freeSize) / (double)totalSize * 100;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Log.WriteLog(ex.Message);
            }
        }
        public static void Init()
        {
            //如有取数之前进行的业务可放在这里，提高性能
            initDiskInfo();
        }
        public static double GetSysInfo(string InfoKey)
        {
            try
            {
                if (dic.ContainsKey(InfoKey))
                {
                    return dic[InfoKey].NextValue();
                }
                else
                {
                    if (InfoKey == "SysDiskUsePercent")
                    {
                        return SysDiskUsePercent;
                    }
                    else if (InfoKey == "DiskUsePercent")
                    {
                        return DiskUsePercent;
                    }
                    else
                    {
                        return -1;
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Log.WriteLog(ex.Message);
                return -1;
            }
        }
    }
}