using YLErp.BLL;
using YLErp.Modules;

namespace YLErp.CustomizedBizLogic
{
    public class BizLogicDZ : BizLogicDefault
    {
        public override string GenerateTradeNumberBeforeConfirm(TradeNumberReqModel reqModel, YLContext db)
        {
            if (reqModel is null)
            {
                throw new ArgumentNullException(nameof(reqModel));
            }

            if (reqModel.trade.TradeDate == null)
            {
                throw new Exception("生成合同编号失败，请先确认该交易成交日期!");
            }

            if (reqModel.clientId == 0)
            {
                throw new Exception("生成合同编号失败，请先确认该交易交易对手方!");
            }


            var code = "";
            var clientNumber = DataCacheProvider.GetClientDataSource().GetData(reqModel.clientId)?.Number.TrimToNull();

            var prefix = reqModel.trade.TradeDate?.ToString("yyyyMMdd");

            prefix += "-" + clientNumber + "-";

            var tradeNumbers =
               db.trade
               .Where(O =>
                   O.TradeNumber.StartsWith(prefix)
                   && O.ValidState != "InValid").Select(O => O.TradeNumber).OrderByDescending(O => O);
            var tradeNumber = tradeNumbers.FirstOrDefault();
            if (string.IsNullOrWhiteSpace(tradeNumber) || !int.TryParse(tradeNumber.Substring(prefix.Length).Split('-')[0], out var tradeCount))
            {
                tradeCount = 0;
            }
            do
            {
                tradeCount++;
                code = $"{prefix}{tradeCount:D2}";
            } while (tradeNumbers.Contains(code));
            return code;
        }
    }
}