using System;
using System.Runtime.InteropServices;

namespace CZGL.SystemInfo
{
    /// <summary>
    /// 提供有关 .NET 运行时安装的信息、程序系统信息等。
    /// </summary>
    public static class SystemPlatformInfo
    {

        /// <summary>
        /// .NET Fx/Core Runtime version
        /// <para>ex: .NET Core 3.1.9</para>
        /// </summary>
        public static string FrameworkDescription => RuntimeInformation.FrameworkDescription;

        /// <summary>
        /// .NET Fx/Core version
        /// <para>
        /// ex:<br />
        /// 3.1.9
        /// </para>
        /// </summary>
        public static string FrameworkVersion => Environment.Version.ToString();

        /// <summary>
        /// 操作系统平台架构，可点击 <see cref="Architecture" /> 获取详细的信息
        /// <para>
        /// ex:<br />
        /// X86<br />
        /// X64<br />
        /// Arm<br />
        /// Arm64
        /// </para>
        /// </summary>
        public static string OSArchitecture => RuntimeInformation.OSArchitecture.ToString();

        /// <summary>
        /// 获取操作系统的类型 <see cref="PlatformID"/>
        /// <para>
        /// ex:<br />
        /// Win32S、Win32Windows、Win32NT、WinCE、Unix、Xbox、MacOSX
        /// </para>
        /// </summary>
        public static string OSPlatformID => Environment.OSVersion.Platform.ToString();

        /// <summary>
        /// 操作系统内核版本
        /// <para>
        /// ex:<br />
        /// Microsoft Windows NT 6.2.9200.0<br />
        /// Unix 4.4.0.19041
        /// </para>
        /// </summary>
        public static string OSVersion => Environment.OSVersion.ToString();

        /// <summary>
        /// 操作系统的版本描述
        /// <para>
        /// ex: <br />
        /// Microsoft Windows 10.0.19041
        /// <br />
        /// Linux 4.4.0-19041-Microsoft #488-Microsoft Mon Sep 01 13:43:00 PST 2020
        /// </para>
        /// </summary>
        public static string OSDescription => RuntimeInformation.OSDescription;

        /// <summary>
        /// 本进程的架构，可点击 <see cref="Architecture" /> 获取详细的信息
        /// <para>
        /// ex:<br />
        /// X86<br />
        /// X64<br />
        /// Arm<br />
        /// Arm64
        /// </para>
        /// </summary>
        public static string ProcessArchitecture => RuntimeInformation.ProcessArchitecture.ToString();

        /// <summary>
        /// 当前计算机上的处理器数
        /// </summary>
        /// <remarks>如 4核心8线程的 CPU，这里会获取到 8</remarks>
        public static int ProcessorCount => Environment.ProcessorCount;

        /// <summary>
        /// 计算机名称
        /// </summary>
        public static string MachineName => Environment.MachineName;

        /// <summary>
        /// 当前登录到此系统的用户名称
        /// </summary>
        public static string UserName => Environment.UserName;

        /// <summary>
        /// 用户网络域名称，即 hostname
        /// </summary>
        public static string UserDomainName => Environment.UserDomainName;


        /// <summary>
        /// 是否在交互模式中运行
        /// </summary>
        public static bool IsUserInteractive => Environment.UserInteractive;

        /// <summary>
        /// 系统的磁盘和分区列表
        /// <para>
        /// ex:<br />
        /// Windows: D:\, E:\, F:\, G:\, H:\, J:\, X:\<br />
        /// Linux:   /, /dev, /sys, /proc, /dev/pts, /run, /run/lock, /run/shm ...
        /// </para>
        /// </summary>
        public static string[] GetLogicalDrives => Environment.GetLogicalDrives();

        /// <summary>
        /// 系统根目录完全路径。<b>Linux 没有系统根目录</b>
        /// <para>
        /// ex:<br />
        /// Windows: X:\WINDOWS\system32<br></br>
        /// Linux  : null
        /// </para>
        /// </summary>
        public static string SystemDirectory => Environment.SystemDirectory;

        /// <summary>
        /// 操作系统内存页一页的字节数
        /// </summary>
        public static int MemoryPageSize => Environment.SystemPageSize;
    }
}