using YLErp.BLL;

namespace YLErp.CustomizedBizLogic
{
    /// <summary>
    /// 瑞达
    /// </summary>
    class BizLogicRD : 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!");
            }
            var code = "";

            var prefix = "OTC-";

            //远期
            if (reqModel.trade.TradeType == "远期")
            {
                //掉期
                if (reqModel.trade.StructureType == "掉期")
                {
                    prefix += "SW-";
                }
                else
                {
                    prefix += "FW-";
                }
            }
            prefix += reqModel.trade.TradeDate?.ToString("yyyyMM");

            var tradeNumbers =
               db.trade
               .Where(O =>
                   O.TradeNumber.StartsWith(prefix)
                   && O.ValidState != "InValid").Select(O => O.TradeNumber).OrderByDescending(O => O);
            var tradeNumber = tradeNumbers.FirstOrDefault();
            var tradeCount = 0;
            if (string.IsNullOrWhiteSpace(tradeNumber) || !int.TryParse(tradeNumber.Substring(prefix.Length), out tradeCount))
            {
                tradeCount = 0;
            }
            do
            {
                tradeCount++;
                code = $"{prefix}{tradeCount:D3}";
            } while (tradeNumbers.Contains(code));
            return code;
        }


        public override void GenerateClientCode(Client clientObj, IQueryable<Client> clientDbQuery)
        {
            if (!string.IsNullOrEmpty(clientObj.Number)) { return; }
            if (string.IsNullOrWhiteSpace(clientObj.Code))
            {
                throw new Exception("生成客户编号失败，请先添加客户代码");
            }
            lock (_clientCodeLock)
            {
                var prefix = "RDXK-" + clientObj.ProcessOptDate?.ToString("yyyyMMdd");
                var last = $"-{clientObj.Code}";

                var existingClientCodes = clientDbQuery.Where(o => o.Number != null && o.Number.StartsWith(prefix))
                    .Select(x => x.Number).OrderByDescending(O => O);
                var existingClientCode = existingClientCodes.FirstOrDefault();

                string code;
                var number = 0;
                {
                    if (!string.IsNullOrWhiteSpace(existingClientCode))
                    {
                        var temp = existingClientCode.Substring(prefix.Length);
                        temp = temp.Substring(0, temp.IndexOf('-'));
                        int.TryParse(temp, out number);
                    }
                    do
                    {
                        number++;
                        code = $"{prefix}{number:D2}{last}";
                    } while (existingClientCodes.Contains(code));

                }
                clientObj.Number = code;
            }
        }
    }
}