using Yi.Framework.Model;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
using Yi.Framework.Model.Models;
using System.IdentityModel.Tokens.Jwt;
using System.IO;

namespace Yi.Framework.WebCore
{
    public static class CommonExtend
    {
        /// <summary>
        /// 判断是否为异步请求
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public static bool IsAjaxRequest(this HttpRequest request)
        {
            string header = request.Headers["X-Requested-With"];
            return "XMLHttpRequest".Equals(header);
        }

        /// <summary>
        /// 通过鉴权完的token获取用户id
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        public static long GetUserIdInfo(this HttpContext httpContext)
        {
            var p = httpContext;
            return Convert.ToInt64(httpContext.User.Claims.FirstOrDefault(u => u.Type == JwtRegisteredClaimNames.Sid).Value);
        }

        /// <summary>
        /// 通过鉴权完的token获取用户名
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        public static string GetUserNameInfo(this HttpContext httpContext)
        {
            var p = httpContext;
            return httpContext.User.Claims.FirstOrDefault(u => u.Type == JwtRegisteredClaimNames.Name).Value;
        }

        /// <summary>
        /// 通过鉴权完的token获取用户部门
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        public static string GetDeptIdInfo(this HttpContext httpContext)
        {
            var p = httpContext;
            return httpContext.User.Claims.FirstOrDefault(u => u.Type == "deptId").Value;
        }

        /// <summary>
        /// 通过鉴权完的token获取权限code
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        public static string GetPermissionInfo(this HttpContext httpContext)
        {
            var p = httpContext;
            return httpContext.User.Claims.FirstOrDefault(u => u.Type == "permission").Value;
        }
        /// <summary>
        /// 基于HttpContext,当前鉴权方式解析，获取用户信息
        /// 现在使用redis作为缓存，不需要将菜单存放至jwt中了
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        public static UserEntity GetUserEntityInfo(this HttpContext httpContext, out List<Guid> menuIds)
        {
            IEnumerable<Claim> claimlist = null;
            long resId = 0;
            try
            {
                claimlist = httpContext.User.Claims;
                resId = Convert.ToInt64(claimlist.FirstOrDefault(u => u.Type == JwtRegisteredClaimNames.Sid).Value);
            }
            catch
            {
                throw new Exception("未授权，Token鉴权失败！");
            }
            menuIds = claimlist.Where(u => u.Type == "menuIds").ToList().Select(u => new Guid(u.Value)).ToList();
            return new UserEntity()
            {
                Id = resId,
                //Name = claimlist.FirstOrDefault(u => u.Type == JwtRegisteredClaimNames.Name).Value
            };
        }

        public static void FileInlineHandle(this HttpContext httpContext, string fileName)
        {
            string encodeFilename = System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.GetEncoding("UTF-8"));
            httpContext.Response.Headers.Add("Content-Disposition", "inline;filename=" + encodeFilename);

        }
        public static void FileAttachmentHandle(this HttpContext httpContext, string fileName)
        {
            string encodeFilename = System.Web.HttpUtility.UrlEncode(fileName, System.Text.Encoding.GetEncoding("UTF-8"));
            httpContext.Response.Headers.Add("Content-Disposition", "attachment;filename=" + encodeFilename);

        }
        public static string GetLanguage(this HttpContext httpContext)
        {
            string res = "zh-CN";
            var str = httpContext.Request.Headers["Accept-Language"].FirstOrDefault();
            if (str.IsNotNull())
            {
                res = str.Split(",")[0];
            }
            return res;

        }

        public static string GetBody(this HttpContext httpContext)
        {
            if (httpContext.Request.Body != null)
            {
                httpContext.Request.EnableBuffering();
                httpContext.Request.Body.Position = 0;
                StreamReader stream = new StreamReader(httpContext.Request.Body);
                return stream.ReadToEndAsync().GetAwaiter().GetResult();
            }
            return "";

        }
    }
}