using System;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using EntrustSettle.Common;
using EntrustSettle.Common.Extensions;
using EntrustSettle.Common.LogHelper;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Org.BouncyCastle.Asn1.Ocsp;
using Polly;

namespace EntrustSettle.Extensions.Middlewares
{
    /// <summary>
    /// 中间件
    /// 记录请求和响应数据
    /// </summary>
    public class RequRespLogMiddleware
    {
        private readonly RequestDelegate _next;

        private readonly ILogger<RequRespLogMiddleware> _logger;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="next"></param>
        public RequRespLogMiddleware(RequestDelegate next, ILogger<RequRespLogMiddleware> logger)
        {
            _next = next;
            _logger = logger;
        }


        public async Task InvokeAsync(HttpContext context)
        {
            if (!AppSettings.app("Middleware", "RequestResponseLog", "Enabled").ObjToBool())
            {
                await _next(context);
                return;
            }

            // 判断如果请求或响应中含有文件上传，不记录日志
            if (context.Request.HasFormContentType && context.Request.Form.Files.Count > 0)
            {
                await _next(context);
                return;
            }

            // 过滤，只有接口
            var ignoreApis = AppSettings.app("Middleware", "RequestResponseLog", "IgnoreApis");
            var api = context.Request.Path.ObjToString().TrimEnd('/');
            if (!api.Contains("api", StringComparison.OrdinalIgnoreCase) || ignoreApis.Contains(api, StringComparison.OrdinalIgnoreCase))
            {
                await _next(context);
                return;
            }
            context.Request.EnableBuffering();

            // 存储请求数据
            await RequestDataLog(context);

            await _next(context);

            // 存储响应数据
            ResponseDataLog(context.Response);
        }

        private async Task RequestDataLog(HttpContext context)
        {
            var request = context.Request;
            var sr = new StreamReader(request.Body);
            var bodyData = await sr.ReadToEndAsync();

            var logContent = new string[]
            {
                $"请求 - [Path]:{request.Path}",
                $"[QueryString]:{request.QueryString}",
                $"[Body]:{bodyData}"
            };
            Parallel.For(0, 1, e =>
            {
                LogLock.OutLogAOP("RequestResponseLog",
                                  context.TraceIdentifier,
                                  logContent);
            });

            request.Body.Position = 0;
        }

        private void ResponseDataLog(HttpResponse response)
        {
            var responseBody = response.GetResponseBody();

            // 去除 Html
            //var reg = "<[^>]+>";

            if (!string.IsNullOrEmpty(responseBody))
            {
                //var isHtml = Regex.IsMatch(responseBody, reg);

                var logContent = new string[]
                {
                    $"响应 - [StatusCode]:{response.StatusCode}",
                    $"[Body]:{responseBody}",
                };
                Parallel.For(0, 1, e =>
                {
                    LogLock.OutLogAOP("RequestResponseLog",
                                  response.HttpContext.TraceIdentifier,
                                  logContent);
                });
            }
        }

        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.OutSql2Log("RequestResponseLog", new string[] { "Response Data:", ResponseBody });
                    LogLock.OutLogAOP("RequestResponseLog", response.HttpContext.TraceIdentifier,
                        new string[] { "Response Data -  ResponseJsonDataType:" + responseBody.GetType().ToString(), responseBody });
                });
            }
        }
    }
}