using Domain.AggregateModel.LinkAggregate;
using Microsoft.AspNetCore.Mvc;
using QRCodeService.Models;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;
using Domain.AggregateModel.AppAggregate;
using Base62;
using QRCodeService.Extensions;

namespace QRCodeService.Controllers
{
    /// <summary>
    /// 生成二维码图片
    /// </summary>
    [Route("api/[controller]")]
    [ApiController]
    public class GenController:ControllerBase
    {
        readonly ILinkRepository linkRepository;
        readonly IAppRepository appRepository;

        public GenController(ILinkRepository linkRepository, IAppRepository appRepository)
        {
            this.linkRepository = linkRepository;
            this.appRepository = appRepository;
        }

        [HttpPost]
        public async  Task<IActionResult> CreateLink(GenInputModel model)
        {

            var app = await appRepository.GetAsync(model.AppId);
            if (app == null)
            {
                return BadRequest();
            }
            using(var md5 = MD5.Create())
            {
                var result = md5.ComputeHash(Encoding.UTF8.GetBytes($"{model.AppId}{model.SuffixUrl}{model.Time}{app.AppKey}"));
                var sign = BitConverter.ToString(result);
                if (sign != model.Sign)
                {
                    return BadRequest();
                }
            }
            var shortCode = $"{model.SuffixUrl}".ToMD5().ToBase62();
            var link = new Link(app.BaseUrl, model.SuffixUrl,1);
            linkRepository.Add(link);
            await linkRepository.UnitOfWork.SaveEntitiesAsync();
            return Ok(link.ShortCode);
        }
    }
}