using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;

namespace Infrastructure.Api.Middwares
{
    public class ExceptionMiddleware
    {
        private readonly RequestDelegate _next;
        private readonly ILogger<ExceptionMiddleware> _logger;
        public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger)
        {
            _next = next;
            _logger = logger;
        }

        public async Task Invoke(HttpContext context)
        {
            try
            {
                await _next(context);
            }
            catch (Exception e)
            {
                await ExceptionHandlerAsync(context, e);
            }
        }

        private async Task ExceptionHandlerAsync(HttpContext context, Exception ex)
        {
            context.Response.ContentType = "application/json";
            context.Response.StatusCode = StatusCodes.Status200OK;
            _logger?.LogError($"系统出现错误：{ex.Message}--{ex.StackTrace}");
            var result = new CommonResponse { Code = context.Response.StatusCode.ToString(), Success = false, Message = ex.Message };
            await context.Response.WriteAsync(JsonConvert.SerializeObject(result));
        }
    }
}