using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using LongHuParkApi.Common;
using LongHuParkApi.Models;

namespace LongHuParkApi.Common
{
    public class CustomActionFilter : IActionFilter
    {
        //添加过滤器
        public void OnActionExecuting(ActionExecutingContext context)
        {
            // Action执行之前
            //判断是否存在AllowAnonymousAttribute属性
            var count = context.ActionDescriptor.EndpointMetadata.Where(c => c.GetType().Name == "AllowAnonymousAttribute").Count();
            if(count == 0)
            {
                //开始验证token是否有效
                var token = context.HttpContext.Request.Headers["token"].ToString();

                //是否验证成功
                bool? success = null;

                if (string.IsNullOrEmpty(token))
                {
                    success = false;
                }
                else
                {
                    var userInfo = CacheHelper.GetCache<UserInfo>(token);
                    if (userInfo == null)
                    {
                        success = false;
                    }
                }

                if(success == false)
                {
                    //如果无效，返回错误信息
                    var result = new JsonResult("权限验证失败");
                    result.StatusCode = (int)HttpStatusCode.BadRequest;
                    context.Result = result;
                }
            }

            
        }
        public void OnActionExecuted(ActionExecutedContext context)
        {
            //Action执行之后
        }
        public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
        {
            // Action执行之前
            await next();
            // Action执行之后
        }
    }
}