using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace LangGuan.Middleware
{
    /// <summary>
    /// 异常处理中间件
    /// </summary>
    public class CustomerExceptionFilter : IAsyncExceptionFilter
    {
        /// <summary>
        /// 日志
        /// </summary>
        public ILogger _logger;
        /// <summary>
        /// 构参
        /// </summary>
        /// <param name="loggerFactory"></param>
        public CustomerExceptionFilter(ILoggerFactory loggerFactory)
        {
            _logger = loggerFactory.CreateLogger<CustomerExceptionFilter>();
        }
        /// <summary>
        /// 重写
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public Task OnExceptionAsync(ExceptionContext context)
        {
            if (context.ExceptionHandled == false)
            {
                var json = new { cdoe = -1, msg = context.Exception.Message, data = context.Exception.Data };
                context.HttpContext.Response.StatusCode = 400;
                context.Result = new JsonResult(json);
            }
            _logger.LogError($"请求出现异常,地址：{context.HttpContext?.Request?.Path}，请求方式：{context.HttpContext.Request.Method}，异常信息：{context.Exception.Message}");
            //记录异常已经处理
            context.ExceptionHandled = true;
            return Task.CompletedTask;
        }
    }
}