using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
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)
        {
            // 过滤，只有接口
            if (context.Request.Path.Value?.Contains("api") ?? false)
            {
                context.Request.EnableBuffering();
                Stream originalBody = context.Response.Body;

                try
                {
                    try
                    {
                        // 存储请求数据
                        await 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
                        ResponseDataLog(context.Response, ms);
                    }
                    catch { }

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

                }
                catch (Exception ex)
                {
                    // 记录异常
                    
                }
                finally
                {
                    context.Response.Body = originalBody;
                }
            }
            else
            {
                await _next(context);
            }
        }


        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; }
    }
}