using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WMS.Web.Core.Dto.Login;
using WMS.Web.Domain.IService.Public;
using WMS.Web.Domain.Services.Public;

namespace WMS.Web.Repositories.DependencyInjection
{
    /// <summary>
    /// token 黑名单中间件
    /// </summary>
    public class AuthorizationTokenSecurityPolicy
    {
        private readonly RequestDelegate _next;
        private readonly IMemoryCache _cache;
        private ILogger<AuthorizationTokenSecurityPolicy> _logger;
        private DateTime _refreshTime = DateTime.Now.AddYears(-5);
        private readonly RedisClientService _redisClientService;

        /// <summary>
        /// token黑名单中间件
        /// </summary>
        /// <param name="next"></param>
        /// <param name="cache"></param>
        public AuthorizationTokenSecurityPolicy(RequestDelegate next, ILogger<AuthorizationTokenSecurityPolicy> logger, IMemoryCache cache, RedisClientService redisClientService)
        {
            _next = next;
            _cache = cache;
            this._logger = logger;
            _redisClientService = redisClientService;
        }

        /// <summary>
        /// 事件
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public async Task Invoke(HttpContext context, ILoginService loginService)
        {
            string authorization = context.Request.Headers["Authorization"];
            string path = context.Request.Path.Value.ToLower();
            string[] pathlist = path.Split('/');
            bool isLogin = pathlist.Where(x => x == "login" || x.ToLower() == "heart" || x.ToLower() == "test").Any();
            if (isLogin)
            {
                context.Response.StatusCode = 200;
                await _next(context);
                return;
            }

            if (string.IsNullOrEmpty(authorization))
            {
                context.Response.StatusCode = 401;
                var result = JsonConvert.SerializeObject(new { status = 401, data = string.Empty, message = "授权失败，请重新登录" });
                context.Response.ContentType = "application/json;charset=utf-8";
                await context.Response.WriteAsync(result);
                return;
            }
            else
            {
                string token = string.Empty;
                if (authorization.StartsWith("Bearer ", StringComparison.OrdinalIgnoreCase))
                {
                    token = authorization.Substring("Bearer ".Length).Trim();
                }

                //判断前端过来的token
                if (string.IsNullOrEmpty(token))
                {
                    context.Response.StatusCode = 401;
                    var result = JsonConvert.SerializeObject(new { status = 401, data = string.Empty, message = "授权失败，请重新登录" });
                    context.Response.ContentType = "application/json;charset=utf-8";
                    await context.Response.WriteAsync(result);
                    return;
                }

                //1.验证是否有登录数据缓存
                var logininfo = _redisClientService.GetStringKey<LoginInDto>($"wms_login_{token}");
                if (logininfo == null)
                {
                    context.Response.StatusCode = 401;
                    var result = JsonConvert.SerializeObject(new { status = 401, data = string.Empty, message = "授权失败，请重新登录" });
                    context.Response.ContentType = "application/json;charset=utf-8";
                    await context.Response.WriteAsync(result);
                    return;

                }
                else
                {
                    _logger.LogInformation("RefreshToken:我在刷新登录--1"+ logininfo.TokenInfo.Expired.ToString());
                    //2.判断缓存的token 过期时间  
                    if (!string.IsNullOrEmpty(logininfo.TokenInfo.Token) && logininfo.TokenInfo.Expired.AddMinutes(-10) <= DateTime.Now)
                    {
                        _logger.LogInformation("RefreshToken:我在刷新登录--2");
                        var refreshtokeninfo = RefreshToken(logininfo.TokenInfo.Token, logininfo.TokenInfo.RefreshToken, loginService);
                        var info = _redisClientService.GetStringKey<LoginInDto>($"wms_login_{token}");
                        _logger.LogInformation("RefreshToken:我在刷新登录--完成：" + info.UserInfo.Nickname);
                        //刷新token后不能删除_redis用户缓存
                        //if (!refreshtokeninfo)
                        //{
                        //    RemoveRedisLoginInfo(token);
                        //}
                    }
                    //3.验证检查是否有黑名单的token缓存
                    string blacktoken = _redisClientService.GetStringKey($"wms_black_token_{logininfo.UserInfo.UcId}");
                    if (string.IsNullOrEmpty(blacktoken))
                    {
                        context.Response.StatusCode = 200;
                        await _next(context);
                    }
                    else
                    {
                        RemoveRedisLoginInfo(token);
                        context.Response.StatusCode = 403;
                        var result = JsonConvert.SerializeObject(new { status = 403, data = string.Empty, message = "拒绝用户证书试图访问此web站点，请与站点管理员联系以建立用户证书权限" });
                        context.Response.ContentType = "application/json;charset=utf-8";
                        await context.Response.WriteAsync(result);
                    }
                }
                if (context.Response.StatusCode == 401 || context.Response.StatusCode == 403)
                {
                    //调用单点的退出接口    
                    var dto = new LoginOutDto()
                    {
                        UcId = logininfo.UserInfo.UcId.ToString(),
                        SessionId = logininfo.UserInfo.SeesionId,
                        Token = logininfo.TokenInfo.Token,
                        AccessToken = logininfo.TokenInfo.PhpToken,
                        ExpiresIn = logininfo.TokenInfo.Expired

                    };
                    var res = await loginService.LoginOutAsync(dto);
                    return;
                }
            }
        }

        /// <summary>
        /// 过期，或者失效，移出token
        /// </summary>
        /// <param name="token"></param>
        private void RemoveRedisLoginInfo(string token)
        {
            if (!string.IsNullOrEmpty(token))
            {
                var info = _redisClientService.GetStringKey<LoginInDto>($"wms_login_{token}");
                if (info != null)
                {
                    _redisClientService.RemoveStringKey($"wms_login_{token}");
                }
            }
        }


        /// <summary>
        /// 刷新token
        /// </summary>
        /// <param name="RefreshToken"></param>
        /// <returns></returns>
        private bool RefreshToken(string OldToken, string RefreshToken, ILoginService _loginService)
        {
            _logger.LogInformation("RefreshToken:我在刷新登录--3");
            var res = _loginService.RefreshToken(OldToken, RefreshToken);

            if (!res.Result.Success)
                return false;
            else
                return true;
        }
    }
}