using System;
using System.Linq;
using System.Threading.Tasks;
using Hncore.Infrastructure.Common;
using Hncore.Infrastructure.Extension;
using Hncore.Infrastructure.Serializer;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Authorization;
using Microsoft.AspNetCore.Mvc.Filters;
using Hncore.Infrastructure.Core.Web;

namespace Hncore.Infrastructure.OpenApi
{
    public class OpenApiAuthAttribute : TypeFilterAttribute
    {
        public OpenApiAuthAttribute() : base(typeof(OpenApiAuthFilter))
        {
            Order = -9997;
        }
    }

    public class OpenApiAuthFilter : IAsyncAuthorizationFilter
    {
        public async Task OnAuthorizationAsync(AuthorizationFilterContext context)
        {
            if (context.Filters.Any(item => item is IAllowAnonymousFilter))
            {
                context.HttpContext.Items["AllowAnonymous"] = true;
                return;
            }
            
            context.HttpContext.Items["OpenApi"] = true;

            var body = await context.HttpContext.Request.ReadBodyAsStringAsync();

            var requestBase = body.FromJsonTo<OpenApiRequestBase>();

            if (requestBase.Timestamp==null)
            {
                OpenApiException.Throw(OpenApiReturnCode.Error,"缺少timestamp参数");
            }

            if (!requestBase.Sign.Has())
            {
                OpenApiException.Throw(OpenApiReturnCode.Error,"缺少sign参数");
            }

            if (!requestBase.AppId.Has())
            {
                OpenApiException.Throw(OpenApiReturnCode.Error,"缺少appid参数");
            }

            var application = await RedisHelper.HGetAsync<Application>("OpenApi:Application", requestBase.AppId);

            context.HttpContext.Items["OpenApiAppKey"] = application.AppKey;

            if (!application.Enable)
            {
                OpenApiException.Throw(OpenApiReturnCode.Unauthorized);
            }

            if (DateTimeHelper.ToUnixTimestamp(DateTime.Now) - requestBase.Timestamp > 60)
            {
                OpenApiException.Throw(OpenApiReturnCode.TimeStampExpired);
            }
            
            requestBase.CheckSign(application.AppKey);
        }
        
    }
}