using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using WIDESEA_Core.Helper;
using WIDESEA_Core.LogHelper;

namespace WIDESEA_Core.Middlewares
{
    /// <summary>
    /// 记录请求和响应数据
    /// </summary>
    public class ApiLogMiddleware
    {
        /// <summary>
        /// 
        /// </summary>
        private readonly RequestDelegate _next;

        public ApiLogMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        //todo
        public async Task InvokeAsync(HttpContext context)
        {
            if (App.ExpDateTime != null && (DateTime.Now - App.ExpDateTime.GetValueOrDefault()).TotalSeconds > 0)
            {
                context.Response.StatusCode = HttpStatusCode.InternalServerError.ObjToInt();
                context.Response.ContentType = "application/json";

                var json = new WebResponseContent();

                json.Message = HttpStatusCode.InternalServerError.ToString();//错误信息
                json.Code = 500;//500异常 

                StreamWriter streamWriter = new StreamWriter(context.Response.Body);
                await streamWriter.WriteAsync(json.Serialize());
                return;
            }

            // 过滤，只有接口
            if (context.Request.Path.Value?.Contains("api") ?? false)
            {
                context.Request.EnableBuffering();
                Stream originalBody = context.Response.Body;
                string requestParam = string.Empty;
                string responseParam = string.Empty;
                try
                {
                    (context.RequestServices.GetService(typeof(RequestLogModel)) as RequestLogModel).RequestDate = DateTime.Now;
                    try
                    {
                        // 存储请求数据
                        requestParam = RequestDataLog(context);
                        context.Request.Body.Position = 0;
                    }
                    catch { }
                    using MemoryStream ms = new();
                    context.Response.Body = ms;

                    await _next(context);

                    try
                    {
                        // 存储响应数据
                        responseParam = ResponseDataLog(context.Response);
                    }
                    catch { }

                    ms.Position = 0;
                    await ms.CopyToAsync(originalBody);

                    if (!((context.Request.Path.Value?.Contains("get")) ?? true) && !((context.Request.Path.Value?.Contains("Get")) ?? true) && !((context.Request.Path.Value?.Contains("query")) ?? true) && !((context.Request.Path.Value?.Contains("Query")) ?? true) && !((context.Request.Path.Value?.Contains("DownLoadApp")) ?? true) && !((context.Request.Path.Value?.Contains("downLoadApp")) ?? true) && !((context.Request.Path.Value?.Contains("UploadApp")) ?? true) && !((context.Request.Path.Value?.Contains("uploadApp")) ?? true))
                        Logger.Add(requestParam, responseParam);
                }
                catch (Exception ex)
                {
                    // 记录异常

                }
                finally
                {
                    context.Response.Body = originalBody;
                }
            }
            else
            {
                await _next(context);
            }
        }
        private string RequestDataLog(HttpContext context)
        {
            var request = context.Request;

            var sr = new StreamReader(request.Body);

            object obj;
            string bodyData = sr.ReadToEndAsync().Result;
            if (request.ContentLength <= 100000)
            {
                obj = new
                {
                    QueryString = request.QueryString.ToString(),
                    BodyData = bodyData
                };
            }
            else
            {
                obj = new
                {
                    QueryString = request.QueryString.ToString(),
                    BodyData = ""
                };
            }
            string data = JsonConvert.SerializeObject(obj);

            request.Body.Position = 0;

            return data;
        }
        private string ResponseDataLog(HttpResponse response)
        {
            if (response.ContentLength <= 100000)
            {
                response.Body.Position = 0;
                using StreamReader stream = new StreamReader(response.Body, leaveOpen: true);
                string body = stream.ReadToEnd();
                response.Body.Position = 0;
                return body;
            }
            return "";
        }

        //private async Task RequestDataLog(HttpContext context)
        //{
        //    var request = context.Request;
        //    var sr = new StreamReader(request.Body);
        //    //long length = request.Body.Length;
        //    RequestLogInfo requestResponse = new RequestLogInfo()
        //    {
        //        Path = request.Path,
        //        QueryString = request.QueryString.ToString(),
        //        BodyData = await sr.ReadToEndAsync()
        //    };
        //    var content = JsonConvert.SerializeObject(requestResponse);
        //    if (!string.IsNullOrEmpty(content))
        //    {
        //        LogLock.OutLogAOP("接口日志", new string[] { "请求数据 -  请求数据类型:" + requestResponse.GetType().ToString(), content });
        //        request.Body.Position = 0;
        //    }
        //}

        private void ResponseDataLog(HttpResponse response, MemoryStream ms)
        {
            ms.Position = 0;
            var responseBody = new StreamReader(ms).ReadToEnd();

            // 去除 Html
            var reg = "<[^>]+>";
            var isHtml = Regex.IsMatch(responseBody, reg);

            if (!string.IsNullOrEmpty(responseBody))
            {
                Parallel.For(0, 1, e =>
                {
                    LogLock.OutLogAOP("接口日志", new string[] { "响应数据 -  响应数据类型:" + responseBody.GetType().ToString(), responseBody });

                });
            }
        }
    }

    public class RequestLogInfo
    {
        /// <summary>
        /// 请求地址
        /// </summary>
        public string Path { get; set; }

        /// <summary>
        /// 请求参数
        /// </summary>
        public string QueryString { get; set; }

        /// <summary>
        /// Body参数
        /// </summary>
        public string BodyData { get; set; }
    }
}