using Microsoft.AspNetCore.Http;
using System;
using System.Threading.Tasks;
using TEAMModelOS.SDK.Context.Constant.Common;
using TEAMModelOS.SDK.Context.Exception;
using TEAMModelOS.SDK.Extension;
using TEAMModelOS.SDK.Helper.Common.JsonHelper;

namespace TEAMModelOS.SDK.Context.Filter
{
    public class HttpGlobalExceptionInvoke
    {
        private readonly RequestDelegate _next;
        /// <summary>
        /// 
        /// </summary>
        /// <param name="next"></param>
        public HttpGlobalExceptionInvoke(RequestDelegate next)
        {
            _next = next;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public async Task InvokeAsync(HttpContext context)
        {
            int bizCode = 0;
            System.Exception exs = null;
            bool isCatched = false;
            try
            {
                await _next(context);
            }
            catch (System.Exception ex) //发生异常
            {
                exs = ex;
                //自定义业务异常
                if (ex is BizException)
                {
                    bizCode = ((BizException)ex).code;
                    if (bizCode == 401 || bizCode == 404 || bizCode == 502 || bizCode == 403)
                    {
                        //context.Response.StatusCode = bizCode;
                    }
                    else
                    {
                      //  context.Response.StatusCode = 200;
                    }
                    // context.Response.StatusCode = ((BizException)ex).code;
                }
                //未知异常
                else
                {
                    //context.Response.StatusCode = 500;                  
                }
                await HandleExceptionAsync(context, bizCode, ex.Message, ex.StackTrace);
                isCatched = true;
            }
            finally
            {
                if (!isCatched && context.Response.StatusCode != 200)//未捕捉过并且状态码不为200
                {
                    string msg;
                    switch (context.Response.StatusCode)
                    {
                        case 400:
                            msg = "Bad Request";
                            break;
                        case 401:
                            msg = "Unauthorized";
                            break;
                        case 404:
                            msg = "Service Not Found";
                            break;
                        case 502:
                            msg = "Request Erro";
                            break;
                        case 500:
                            msg = exs.Message;
                            break;
                        case 403:
                            msg = "金钥验证错误";
                            break;
                        default:
                            msg = "Unknown Error";
                            break;
                    }
                    await HandleExceptionAsync(context, bizCode, msg, exs == null ? "" : exs.StackTrace);
                }
            }
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="context"></param>
        /// 
        /// 
        /// <param name="statusCode"></param>
        /// <param name="msg"></param>
        /// <returns></returns>
        private static async Task HandleExceptionAsync(HttpContext context, int bizCode, string msg, string devmsg)
        {
            if (context.Response.StatusCode == 500)
            {
               // context.Response.StatusCode = 200;
            }
            var data = new ErrorResponse<string>(bizCode, msg, devmsg);
            context.Response.ContentType = Constants.CONTENT_TYPE_JSON;
            //if (context.Response.HasStarted) {
            await context.Response.WriteAsync(data.ToJsonString());
            //}

        }
        /// <summary>
        /// 异常信息封装
        /// </summary>
        /// 

        public class ErrorResponse<T>
        {
            public ErrorResponse()
            {
                error = new ErrorModel<T>();
            }
            public ErrorResponse(string message)
            {
                error = new ErrorModel<T>
                {
                    message = message,
                    devmsg = message
                };
            }
            public ErrorResponse(int code, string message)
            {
                error = new ErrorModel<T>
                {
                    message = message,
                    devmsg = message,
                    code = code
                };

            }
            public ErrorResponse(int code, string message, string devMessage)
            {
                error = new ErrorModel<T>
                {
                    message = message,
                    devmsg = message,
                    code = code
                };
                error.devmsg = devMessage;
            }

           // public string jsonrpc { get; set; } = "2.0";
           // public double id { get; set; } = 1;
            private object result { get; set; } = null;
            public ErrorModel<T> error { get; set; } = null;
        }
    }

    public class ErrorModel<E>
    {
      //  public long responseTime = DateTime.Now.Ticks;
        public int code { get; set; } = 1;
        public string message { get; set; }
        public string devmsg { get; set; }
        public E data { get; set; }
    }

}