using System.Security.Claims;
using System.Text;
using System.Text.RegularExpressions;
using Base;
using Extensions;
using IPTools.Core;
using Model.Base;
using UAParser;
using Util;

namespace Extensions
{
    /// <summary>
    /// HttpContext扩展类
    /// </summary>
    public static partial class HttpContextExtension
    {
        /// <summary>
        /// 是否是ajax请求
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public static bool IsAjaxRequest(this HttpRequest request)
        {
            if (request == null)
            {
                throw new ArgumentNullException(nameof(request));
            }

            //return request.Headers.ContainsKey("X-Requested-With") &&
            //       request.Headers["X-Requested-With"].Equals("XMLHttpRequest");

            return request.Headers["X-Requested-With"] == "XMLHttpRequest" || request.Headers != null && request.Headers["X-Requested-With"] == "XMLHttpRequest";
        }

        /// <summary>
        /// 获取客户端IP
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static string GetClientUserIp(this HttpContext context)
        {
            if (context == null) return "";
            var result = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();
            if (string.IsNullOrEmpty(result))
            {
                result = context.Connection.RemoteIpAddress?.ToString();
            }
            if (string.IsNullOrEmpty(result))
                throw new Exception("获取IP失败");

            if (result.Contains("::1"))
                result = "127.0.0.1";

            result = result.Replace("::ffff:", "");
            result = result.Split(':')?.FirstOrDefault() ?? "127.0.0.1";
            result = IsIP(result) ? result : "127.0.0.1";
            return result;
        }

        /// <summary>
        /// 判断是否IP
        /// </summary>
        /// <param name="ip"></param>
        /// <returns></returns>
        public static bool IsIP(string ip)
        {
            return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
        }

        /// <summary>
        /// 获取登录用户id
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static long GetUId(this HttpContext context)
        {
            TokenModel loginUser = JwtUtil.GetLoginUser(context);
            return loginUser.userId;
            // var uid = context.User.FindFirstValue(ClaimTypes.PrimarySid);
            // return !string.IsNullOrEmpty(uid) ? long.Parse(uid) : 0;
        }

        /// <summary>
        /// 获取部门id
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static long GetDeptId(this HttpContext context)
        {
            var deptId = context.User.FindFirstValue(ClaimTypes.GroupSid);
            return !string.IsNullOrEmpty(deptId) ? long.Parse(deptId) : 0;
        }

        /// <summary>
        /// 获取登录用户名
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static string GetName(this HttpContext context)
        {
            var uid = context.User?.Identity?.Name;

            return uid;
        }

        /// <summary>
        /// 判断是否是管理员
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static bool IsAdmin(this HttpContext context)
        {
            var userName = context.GetName();
            return userName == GlobalConstant.AdminRole;
        }

        /// <summary>
        /// ClaimsIdentity
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static IEnumerable<ClaimsIdentity> GetClaims(this HttpContext context)
        {
            return context.User?.Identities;
        }
        //public static int GetRole(this HttpContext context)
        //{
        //    var roleid = context.User.FindFirstValue(ClaimTypes.Role) ?? "0";

        //    return int.Parse(roleid);
        //}

        public static string GetUserAgent(this HttpContext context)
        {
            return context.Request.Headers["User-Agent"];
        }

        /// <summary>
        /// 获取请求令牌
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static string GetToken(this HttpContext context)
        {
            return context.Request.Headers["Authorization"];
        }

        /// <summary>
        /// 获取请求Url
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static string GetRequestUrl(this HttpContext context)
        {
            return context != null ? context.Request.Path.Value : "";
        }

        /// <summary>
        /// 获取请求参数
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static string GetQueryString(this HttpContext context)
        {
            return context != null ? context.Request.QueryString.Value : "";
        }

        /// <summary>
        /// 获取body请求参数
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static string GetBody(this HttpContext context)
        {
            context.Request.EnableBuffering();
            context.Request.Body.Seek(0, SeekOrigin.Begin);
            using var reader = new StreamReader(context.Request.Body, Encoding.UTF8);
            //需要使用异步方式才能获取
            return reader.ReadToEndAsync().Result;
            // string body = string.Empty;
            // var buffer = new MemoryStream();
            // context.Request.Body.Seek(0, SeekOrigin.Begin);
            // context.Request.Body.CopyToAsync(buffer);
            // buffer.Position = 0;
            // try
            // {
            //     using StreamReader streamReader = new(buffer, Encoding.UTF8);
            //     body = streamReader.ReadToEndAsync().Result;
            // }
            // finally
            // {
            //     buffer?.Dispose();
            // }
            // return body;
            // var reader = new StreamReader(context.Request.Body, Encoding.UTF8);
            // //需要使用异步方式才能获取
            // string content = reader.ReadToEnd();
            // reader.Dispose();
            // return content;
        }

        /// <summary>
        /// 获取浏览器信息
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static ClientInfo GetClientInfo(this HttpContext context)
        {
            var str = context.GetUserAgent();
            var uaParser = Parser.GetDefault();
            ClientInfo c = uaParser.Parse(str);

            return c;
        }

        /// <summary>
        /// 根据IP获取地理位置
        /// </summary>
        /// <returns></returns>
        public static string GetIpInfo(string IP)
        {
            var ipInfo = IpTool.Search(IP);
            return ipInfo?.Province + "-" + ipInfo?.City + "-" + ipInfo?.NetworkOperator;
        }

        /// <summary>
        /// 设置请求参数
        /// </summary>
        /// <param name="reqMethod"></param>
        /// <param name="context"></param>
        public static string GetRequestValue(this HttpContext context, string reqMethod)
        {
            string param = string.Empty;

            if (HttpMethods.IsPost(reqMethod) || HttpMethods.IsPut(reqMethod) || HttpMethods.IsDelete(reqMethod))
            {
                param = context.GetBody();
                string regex = "(?<=\"password\":\")[^\",]*";
                param = Regex.Replace(param, regex, "***");
            }
            if (param.IsEmpty())
            {
                param = context.GetQueryString();
            }
            return param;
        }
    }

}