using System.Diagnostics;
using System.Management;
using System.Runtime.InteropServices;
using JNPF.Common.Model.Machine;
using JNPF.DependencyInjection;

namespace JNPF.Common.Security;

/// <summary>
/// 获取服务器信息.
/// </summary>
[SuppressSniffer]
public static class MachineHelper
{
    #region Linux

    /// <summary>
    /// 系统信息.
    /// </summary>
    /// <returns></returns>
    public static SystemInfoModel GetSystemInfo_Linux()
    {
        try
        {
            var systemInfo = new SystemInfoModel();
            var process = new Process
            {
                StartInfo = new ProcessStartInfo("ifconfig")
                {
                    RedirectStandardOutput = true,
                    UseShellExecute = false
                }
            };
            process.Start();
            var hddInfo = process.StandardOutput.ReadToEnd();
            process.WaitForExit();
            process.Dispose();
            process.Close();
            var lines = hddInfo.Split('\n');
            foreach (var item in lines)
            {
                if (item.Contains("inet"))
                {
                    var li = item.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                    systemInfo.ip = li[1];
                    break;
                }
            }

            TimeSpan P_TimeSpan = DateTime.Now.Subtract(DateTime.Now);
            systemInfo.os = RuntimeInformation.OSDescription;
            systemInfo.day = FormatTime((long)(DateTimeOffset.Now - Process.GetCurrentProcess().StartTime).TotalMilliseconds);
            return systemInfo;
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
    }

    /// <summary>
    /// CPU信息
    /// </summary>
    /// <returns></returns>
    public static CpuInfoModel GetCpuInfo_Linux()
    {
        var cpuInfo = new CpuInfoModel();
        cpuInfo.core = Environment.ProcessorCount + "个物理核心";
        cpuInfo.logic = Environment.ProcessorCount + "个逻辑CPU";
        cpuInfo.package = Environment.ProcessorCount + "个物理CPU";
        cpuInfo.coreNumber = Environment.ProcessorCount;
        var cpuInfoList = (File.ReadAllText(@"/proc/cpuinfo")).Split(' ').Where(o => o != string.Empty).ToList();
        cpuInfo.name = string.Format("{0} {1} {2}", cpuInfoList[7], cpuInfoList[8], cpuInfoList[9]);
        var psi = new ProcessStartInfo("top", " -b -n 1") { RedirectStandardOutput = true };
        var proc = Process.Start(psi);
        if (proc == null)
        {
            return cpuInfo;
        }
        else
        {
            using (var sr = proc.StandardOutput)
            {
                var index = 0;
                while (!sr.EndOfStream)
                {
                    if (index == 2)
                    {
                        GetCpuUsed(sr.ReadLine(), cpuInfo);
                        break;
                    }
                    sr.ReadLine();
                    index++;

                }
                if (!proc.HasExited)
                {
                    proc.Kill();
                }
            }
        }

        return cpuInfo;
    }

    /// <summary>
    /// 硬盘信息.
    /// </summary>
    /// <returns></returns>
    public static DiskInfoModel GetDiskInfo_Linux()
    {
        var output = new DiskInfoModel();
        var process = new Process
        {
            StartInfo = new ProcessStartInfo("df", "-h /")
            {
                RedirectStandardOutput = true,
                UseShellExecute = false
            }
        };
        process.Start();
        var hddInfo = process.StandardOutput.ReadToEnd();
        process.WaitForExit();
        process.Dispose();

        var lines = hddInfo.Split('\n');
        foreach (var item in lines)
        {

            if (item.Contains("/dev/sda4") || item.Contains("/dev/mapper/cl-root") || item.Contains("/dev/mapper/centos-root"))
            {
                var li = item.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                for (int i = 0; i < li.Length; i++)
                {
                    if (li[i].Contains("%"))
                    {
                        output = new DiskInfoModel()
                        {
                            total = li[i - 3],
                            used = li[i - 2],
                            available = li[i - 1],
                            usageRate = li[i].Replace("%", string.Empty)
                        };
                        break;
                    }
                }
            }
        }

        return output;
    }

    /// <summary>
    /// 内存信息.
    /// </summary>
    /// <returns></returns>
    public static MemoryInfoModel GetMemoryInfo_Linux()
    {
        var output = new MemoryInfoModel();
        const string CPU_FILE_PATH = "/proc/meminfo";
        var mem_file_info = File.ReadAllText(CPU_FILE_PATH);
        var lines = mem_file_info.Split(new[] { '\n' });

        int count = 0;
        foreach (var item in lines)
        {
            if (item.StartsWith("MemTotal:"))
            {
                count++;
                var tt = item.Split(new[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
                output.total = tt[1].Trim();
            }
            else if (item.StartsWith("MemAvailable:"))
            {
                count++;
                var tt = item.Split(new[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
                output.available = tt[1].Trim();
            }

            if (count >= 2) break;
        }

        long total = long.Parse(output.total.Replace(" kB", string.Empty));
        long available = long.Parse(output.available.Replace(" kB", string.Empty));
        long used = total - available;
        decimal usageRate = (decimal)used / (decimal)total;
        output.usageRate = (Math.Round(usageRate, 2, MidpointRounding.AwayFromZero) * 100).ToString();
        output.used = used.ToString() + " kB";
        return output;
    }

    /// <summary>
    /// 获取cpu使用率.
    /// </summary>
    /// <param name="cpuInfo">%Cpu(s): 3.2 us, 0.0 sy, 0.0 ni, 96.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st.</param>
    /// <param name="cpuOutput"></param>
    private static void GetCpuUsed(string cpuInfo, CpuInfoModel cpuOutput)
    {
        try
        {
            var str = cpuInfo.Replace("%Cpu(s):", string.Empty).Trim();
            var list = str.Split(",").ToList();
            var dic = new Dictionary<string, string>();
            foreach (var item in list)
            {
                var key = item.Substring(item.Length - 2, 2);
                dic[key] = item.Replace(key, string.Empty);
            }

            cpuOutput.used = dic["us"];
            cpuOutput.idle = dic["id"];
        }
        catch (Exception)
        {

        }
    }
    #endregion

    #region Windows

    /// <summary>
    /// 系统信息.
    /// </summary>
    /// <returns></returns>
    public static SystemInfoModel GetSystemInfo_Windows()
    {
        try
        {
            var systemInfo = new SystemInfoModel();
            ManagementClass MC = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection MOC = MC.GetInstances();
            foreach (ManagementObject MO in MOC)
            {
                if ((bool)MO["IPEnabled"] == true)
                {
                    string[] IPAddresses = (string[])MO["IPAddress"]; //获取本地的IP地址
                    if (IPAddresses.Length > 0)
                        systemInfo.ip = IPAddresses[0];
                }
            }

            systemInfo.day = FormatTime((long)(DateTimeOffset.Now - Process.GetCurrentProcess().StartTime).TotalMilliseconds);
            return systemInfo;
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
    }

    /// <summary>
    /// CPU信息
    /// </summary>
    /// <returns></returns>
    public static CpuInfoModel GetCpuInfo_Windows()
    {
        var cpuInfo = new CpuInfoModel();
        ManagementObjectSearcher mos = new ManagementObjectSearcher("Select * from Win32_Processor");
        foreach (ManagementObject mo in mos.Get())
        {
            cpuInfo.name = mo["Name"].ToString();
            cpuInfo.coreNumber = int.Parse(mo["NumberOfCores"].ToString());
            cpuInfo.core = mo["NumberOfCores"].ToString() + "个物理核心";
        }

        foreach (var item in new ManagementObjectSearcher("Select * from Win32_ComputerSystem").Get())
        {
            cpuInfo.package = item["NumberOfProcessors"].ToString() + "个物理CPU";
            cpuInfo.logic = item["NumberOfLogicalProcessors"].ToString() + "个逻辑CPU";
        }

        PerformanceCounter oPerformanceCounter = new PerformanceCounter("Processor", "% Processor Time", "_Total");
        cpuInfo.used = Math.Round((decimal)oPerformanceCounter.NextValue(), 2, MidpointRounding.AwayFromZero).ToString();
        cpuInfo.idle = (100 - Convert.ToDouble(oPerformanceCounter.NextValue().ToString())).ToString() + "%";
        return cpuInfo;
    }

    /// <summary>
    /// 硬盘信息.
    /// </summary>
    /// <returns></returns>
    public static DiskInfoModel GetDiskInfo_Windows()
    {
        var output = new DiskInfoModel();
        long total = 0L;
        long available = 0L;
        foreach (var item in new ManagementObjectSearcher("Select * from win32_logicaldisk").Get())
        {
            available += Convert.ToInt64(item["FreeSpace"]);
            total += Convert.ToInt64(item["Size"]);
        }

        long used = total - available;
        decimal usageRate = (decimal)used / (decimal)total;
        output.total = (total / (1024 * 1024 * 1024)).ToString() + "G";
        output.available = (available / (1024 * 1024 * 1024)).ToString() + "G";
        output.used = (used / (1024 * 1024 * 1024)).ToString() + "G";
        output.usageRate = Math.Round(usageRate, 2, MidpointRounding.AwayFromZero).ToString();
        return output;
    }

    /// <summary>
    /// 内存信息.
    /// </summary>
    /// <returns></returns>
    public static MemoryInfoModel GetMemoryInfo_Windows()
    {
        var output = new MemoryInfoModel();

        #region 旧代码

        long bcs = 1024 * 1024 * 1024;
        long total = 0;
        long available = 0;
        long used = 0;
        double usageRate = 0.00;
        ManagementClass mc = new ManagementClass("Win32_ComputerSystem");
        ManagementObjectCollection moc = mc.GetInstances();
        foreach (ManagementObject mo in moc)
        {
            total = Convert.ToInt64(mo["TotalPhysicalMemory"]);
        }

        foreach (var item in new ManagementObjectSearcher("Select * from Win32_OperatingSystem").Get())
        {
            available = Convert.ToInt64(item["FreePhysicalMemory"]);
        }

        used = total - available;
        usageRate = used / total;
        output.total = (total / bcs).ToString() + "G";
        output.available = (available / bcs).ToString() + "G";
        output.used = (used / bcs).ToString() + "G";
        output.usageRate = Math.Round((decimal)usageRate, 2, MidpointRounding.AwayFromZero).ToString();

        #endregion

        return output;
    }

    /// <summary>
    /// 毫秒转天时分秒.
    /// </summary>
    /// <param name="ms"></param>
    /// <returns></returns>
    private static string FormatTime(long ms)
    {
        int ss = 1000;
        int mi = ss * 60;
        int hh = mi * 60;
        int dd = hh * 24;

        long day = ms / dd;
        long hour = (ms - day * dd) / hh;
        long minute = (ms - day * dd - hour * hh) / mi;
        long second = (ms - day * dd - hour * hh - minute * mi) / ss;

        string sDay = day < 10 ? "0" + day : string.Empty + day; // 天
        string sHour = hour < 10 ? "0" + hour : string.Empty + hour; // 小时
        string sMinute = minute < 10 ? "0" + minute : string.Empty + minute; // 分钟
        string sSecond = second < 10 ? "0" + second : string.Empty + second; // 秒
        return string.Format("{0} 天 {1} 小时 {2} 分 {3} 秒", sDay, sHour, sMinute, sSecond);
    }

    #endregion
}