using Microsoft.AspNetCore.Mvc.Filters;
using ServiceCenter.Logs;
using System.Diagnostics;

namespace ServiceCenter.Attributes
{
    public class LogAttribute : ActionFilterAttribute
    {
        private string LogFlag { get; set; }
        private string ActionArguments { get; set; }

        /// <summary>
        /// 请求体中的所有值
        /// </summary>
        private string RequestBody { get; set; }

        private Stopwatch Stopwatch { get; set; }

        public LogAttribute(string logFlag)
        {
            LogFlag = logFlag;
        }

        public override void OnActionExecuting(ActionExecutingContext context)
        {
            ActionArguments = Newtonsoft.Json.JsonConvert.SerializeObject(context.ActionArguments);
            Stopwatch = new Stopwatch();
            Stopwatch.Start();
        }

        public override void OnActionExecuted(ActionExecutedContext context)
        {
            base.OnActionExecuted(context);
            Stopwatch.Stop();
            string url = context.HttpContext.Request.Host + context.HttpContext.Request.Path + context.HttpContext.Request.QueryString;
            string method = context.HttpContext.Request.Method;
            string qs = ActionArguments;
            string res = "在返回结果前发生了异常";
            if (context.Result == null)
            {
                res = "无返回结果";
            }
            else
            {
                dynamic result = context.Result.GetType().Name == "EmptyResult" ? new { Value = "无返回结果" } : context.Result as dynamic;
                try
                {
                    if (result != null)
                    {
                        res = Newtonsoft.Json.JsonConvert.SerializeObject(result.Value);
                    }
                }
                catch (Exception)
                {
                    res = "日志未获取到结果，返回的数据无法序列化";
                }
            }

            var msg = $"方法:{LogFlag}-地址:{url}-方式:{method}-耗时:{Stopwatch.Elapsed.TotalMilliseconds}毫秒(指控制器内对应方法执行完毕的时间)\n" +
                      $"参数：{qs}\n " +
                      $"结果：{res}";
            LogHub.InterfacePublish(LogFlag, msg);
        }
    }
}