using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Text;
using DS.Module.Core.ServiceExtensions;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Razor.Language;
using Microsoft.Extensions.DependencyInjection;

namespace DS.Module.Core;

/// <summary>
/// HTTP工具类
/// </summary>
public static class HttpNewUtil
{
    /// <summary>
    /// Http上下文访问器
    /// </summary>
    public static IHttpContextAccessor HttpContextAccessor=> ServiceLocator.Instance.GetRequiredService<IHttpContextAccessor>();

    /// <summary>
    /// 当前Http上下文
    /// </summary>
    public static HttpContext HttpContext => HttpContextAccessor?.HttpContext;
    
    // /// <summary>
    // /// 初始化Web操作
    // /// </summary>
    // public static void Configure (IHttpContextAccessor _accessor) {
    //     try {
    //         HttpContextAccessor = _accessor;
    //     }
    //     catch {
    //     }
    // }

     /// <summary>
    /// 客户端IP地址
    /// </summary>
    public static string Ip
    {
        get
        {
            var result = string.Empty;
            if (HttpContext != null)
            {
                result = GetWebClientIp();
            }

            if (string.IsNullOrEmpty(result))
            {
                result = GetLanIp();
            }

            return result;
        }
    }

    /// <summary>
    /// 得到客户端IP地址
    /// </summary>
    /// <returns></returns>
    private static string GetWebClientIp()
    {
        var ip = GetWebRemoteIp();
        foreach (var hostAddress in Dns.GetHostAddresses(ip))
        {
            if (hostAddress.AddressFamily == AddressFamily.InterNetwork)
            {
                return hostAddress.ToString();
            }
        }

        return string.Empty;
    }

    /// <summary>
    /// 得到局域网IP地址
    /// </summary>
    /// <returns></returns>
    public static string GetLanIp()
    {
        foreach (var hostAddress in Dns.GetHostAddresses(Dns.GetHostName()))
        {
            if (hostAddress.AddressFamily == AddressFamily.InterNetwork)
            {
                return hostAddress.ToString();
            }
        }

        return string.Empty;
    }

    /// <summary>
    /// 得到远程Ip地址
    /// </summary>
    /// <returns></returns>
    private static string GetWebRemoteIp()
    {
        if (HttpContext?.Connection?.RemoteIpAddress == null)
            return string.Empty;
        var ip = HttpContext?.Connection?.RemoteIpAddress.ToString();
        if (HttpContext == null)
            return ip;
        if (HttpContext.Request.Headers.ContainsKey("X-Real-IP"))
        {
            ip = HttpContext.Request.Headers["X-Real-IP"].ToString();
        }

        if (HttpContext.Request.Headers.ContainsKey("X-Forwarded-For"))
        {
            ip = HttpContext.Request.Headers["X-Forwarded-For"].ToString();
        }

        return ip;
    }

    /// <summary>
    /// 请求UserAgent信息
    /// </summary>
    public static string UserAgent
    {
        get
        {
            string userAgent = HttpContext?.Request?.Headers["User-Agent"];

            return userAgent;
        }
    }

    /// <summary>
    /// 请求Url
    /// </summary>
    public static string Url
    {
        get
        {
            var url = new StringBuilder().Append(HttpContext?.Request?.Scheme).Append("://")
                .Append(HttpContext?.Request?.Host).Append(HttpContext?.Request?.PathBase)
                .Append(HttpContext?.Request?.Path).Append(HttpContext?.Request?.QueryString).ToString();
            return url;
        }
    }

    /// <summary>
    /// 得到操作系统版本
    /// </summary>
    /// <returns></returns>
    public static string GetOSVersion()
    {
        var osVersion = string.Empty;
        var userAgent = UserAgent;
        if (userAgent.Contains("NT 10"))
        {
            osVersion = "Windows 10";
        }
        else if (userAgent.Contains("NT 6.3"))
        {
            osVersion = "Windows 8";
        }
        else if (userAgent.Contains("NT 6.1"))
        {
            osVersion = "Windows 7";
        }
        else if (userAgent.Contains("NT 6.0"))
        {
            osVersion = "Windows Vista/Server 2008";
        }
        else if (userAgent.Contains("NT 5.2"))
        {
            osVersion = "Windows Server 2003";
        }
        else if (userAgent.Contains("NT 5.1"))
        {
            osVersion = "Windows XP";
        }
        else if (userAgent.Contains("NT 5"))
        {
            osVersion = "Windows 2000";
        }
        else if (userAgent.Contains("NT 4"))
        {
            osVersion = "Windows NT4";
        }
        else if (userAgent.Contains("Android"))
        {
            osVersion = "Android";
        }
        else if (userAgent.Contains("Me"))
        {
            osVersion = "Windows Me";
        }
        else if (userAgent.Contains("98"))
        {
            osVersion = "Windows 98";
        }
        else if (userAgent.Contains("95"))
        {
            osVersion = "Windows 95";
        }
        else if (userAgent.Contains("Mac"))
        {
            osVersion = "Mac";
        }
        else if (userAgent.Contains("Unix"))
        {
            osVersion = "UNIX";
        }
        else if (userAgent.Contains("Linux"))
        {
            osVersion = "Linux";
        }
        else if (userAgent.Contains("SunOS"))
        {
            osVersion = "SunOS";
        }

        return osVersion;
    }
}