using FlexJobApi.Core;
using Furion.DatabaseAccessor;
using MediatR;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FlexJobApi.CommonServer.Application
{
    /// <summary>
    /// 查询编号地址
    /// </summary>
    /// <param name="rep"></param>
    public class CodeUrlQueryHandler(
            IRepository<CodeUrl> rep
        ) :
        IRequestHandler<GetCodeUrlQuery, string?>
    {
        private readonly IRepository<CodeUrl> rep = rep;

        /// <summary>
        /// 查询编号地址
        /// </summary>
        /// <param name="request"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        public async Task<string?> Handle(GetCodeUrlQuery request, CancellationToken cancellationToken)
        {
            var now = DateTime.Now;
            return await rep.AsQueryable().AsNoTracking()
                .Where(it =>
                    it.Scene == request.Scene
                    && it.Code == request.Code
                    && (it.ExpiredTime == null
                    || it.ExpiredTime > now))
                .Select(it => it.Url)
                .FirstOrDefaultAsync();
        }
    }
}