using System.Text;
using Dlhis.Constants;
using Dlhis.Entity.Canteen.Entities.Voucher;
using Kurisu.AspNetCore.Authentication.Abstractions;
using Kurisu.AspNetCore.DataAccess.SqlSugar.Services;
using Kurisu.AspNetCore.Utils.Extensions;

namespace Dlhis.Canteen.Voucher.Services.Implements;

public class VoucherQrCodeService : IVoucherQrCodeService
{
    private readonly IDbContext _dbContext;
    private readonly ICurrentUser _currentUser;

    public VoucherQrCodeService(IDbContext dbContext, ICurrentUser currentUser)
    {
        _dbContext = dbContext;
        _currentUser = currentUser;
    }


    public async Task<string> GetQrCodeAsync(string voucherNo, bool isNeedRefresh = false)
    {
        var userCode = _currentUser.GetUserClaim(UserClaimConstants.JinkoCode);
        if (!await _dbContext.Queryable<VoucherUserInfoEntity>().Where(x => x.VoucherNo == voucherNo && x.UserCode == userCode).AnyAsync())
        {
            true.ThrowIfTrue("非法的消费券");
        }

        var qrcodeInfo = await _dbContext.Queryable<VoucherQrCodeEntity>().SingleAsync(x => x.VoucherNo == voucherNo);

        if (qrcodeInfo == null)
        {
            qrcodeInfo = new VoucherQrCodeEntity
            {
                VoucherNo = voucherNo,
                QrCode = GenerateQrCode(voucherNo)
            };

            await _dbContext.InsertAsync(qrcodeInfo);
            return qrcodeInfo.QrCode;
        }

        var now = DateTime.Now;
        if (qrcodeInfo.ModifiedTime.AddMinutes(1) >= now && !isNeedRefresh)
        {
            return qrcodeInfo.QrCode;
        }

        qrcodeInfo.QrCode = GenerateQrCode(voucherNo);
        await _dbContext.UpdateAsync(qrcodeInfo);

        return qrcodeInfo.QrCode;
    }


    /// <summary>
    /// qrCode生成
    /// </summary>
    /// <param name="voucherNo"></param>
    /// <returns></returns>
    private static string GenerateQrCode(string voucherNo)
    {
        var ts = DateTimeOffset.Now.ToUnixTimeMilliseconds();

        return QrCodeConstants.Birthday + voucherNo.ToArray().Select(x =>
        {
            var b = Encoding.ASCII.GetBytes(x.ToString());
            int i = b[0];
            return Convert.ToString(i);

        }).Join(string.Empty) + ts;
    }
}