using System.Text;
using System.Web;
using Common;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Authorization.Policy;
using Model.Base;
using Util;

namespace Filters
{
    public class RefererMiddleware
    {
        private readonly RequestDelegate _next;
        private readonly ILogger<RefererMiddleware> _log;

        public RefererMiddleware(RequestDelegate next, ILogger<RefererMiddleware> log)
        {
            _next = next;
            _log = log;
        }

        public async Task InvokeAsync(HttpContext context)
        {
            context.Request.EnableBuffering(); // 允许多次读取
            string authResult = AuthMiddleware.Do(context);
            if(authResult != "success")
            {
                context.Response.StatusCode = StatusCodes.Status401Unauthorized;
                await context.Response.WriteAsync(authResult);
                return;
            }
            int decryptResult = DecryptMiddleware.Do(context);
            if(decryptResult == 1)
            {
                await _next(context);
                return;
            }
            if(decryptResult == 2)
            {
                context.Response.StatusCode = StatusCodes.Status400BadRequest;
                await context.Response.WriteAsync("解密异常");
                return;
            }

            await _next(context);
        }
    }
}