using YLErp.BLL;
using YLErp.Modules;

namespace YLErp.CustomizedBizLogic
{
    public class BizLogicHuaAn : BizLogicDefault
    {
        /// <summary>
        /// 生成客户编号
        /// </summary>
        /// <param name="initialCode">客户创建时的初始编号，如果没有传null</param>
        public override void GenerateClientCode(Client clientObj, IQueryable<Client> clientDbQuery)
        {
            const string HAZB = "HAZB";
            const string CW = "CW";

            if (string.IsNullOrWhiteSpace(clientObj.Number))
            {
                lock (_clientCodeLock)
                {
                    int date = clientObj.ProtocolSignDate?.Year ?? 0;
                    string leftPart = "";
                    if (2017 <= date && date <= 2018)
                    {
                        leftPart = HAZB + "-" + CW + clientObj.ProtocolSignDate?.ToString("yyyy");
                    }
                    else if (2019 <= date && date <= 2020)
                    {
                        leftPart = HAZB + clientObj.ProtocolSignDate?.ToString("yy") + CW + (string.IsNullOrEmpty(clientObj.RiskServiceDegreeName) ? "R0" : clientObj.RiskServiceDegreeName);
                    }
                    else if (date >= 2021)
                    {
                        leftPart = HAZB + clientObj.ProtocolSignDate?.ToString("yy") + CW;
                    }
                    var leftPartSize = leftPart.Length;
                    var existingNumbers = clientDbQuery.Where(x => x.Number.StartsWith(leftPart)).Select(x => x.Number).ToArray();
                    var maxNumber = 0;
                    if (existingNumbers.Any())
                    {
                        maxNumber = existingNumbers.Max(x => int.TryParse(x?.Substring(leftPartSize), out var number) ? number : 0);
                    }
                    clientObj.Number = leftPart + (maxNumber + 1).ToString().PadLeft(3, '0');
                }
            }
        }

        /// <summary>
        /// 在交易确认前生成交易编号
        /// </summary>
        public override string GenerateTradeNumberBeforeConfirm(TradeNumberReqModel reqModel, YLContext db)
        {
            if (reqModel is null)
            {
                throw new ArgumentNullException(nameof(reqModel));
            }

            //对于对冲交易、场内交易等没有设置客户的
            if (reqModel.clientId == 0)
            {
                return DateTime.Now.ToString("yyyyMMddHHmmssfff");
            }

            var client = DataCacheProvider.GetClientDataSource().GetData(reqModel.clientId);
            var clientNumber = client?.Number.TrimToNull();
            int date = client.ProtocolSignDate?.Year ?? 0;

            //合并起来作为获取递增序号的取值条件
            var leftPart = clientNumber + "-";
            var fullSize = leftPart.Length + 3;
            if (2017 <= date && date <= 2018)
            {
                fullSize = leftPart.Length + 2;
            }

            //获取数据库该用户最大的交易编号记录
            var tradeNumber = db.trade.Where(x => x.TradeNumber.StartsWith(leftPart) && x.TradeNumber.Length == fullSize)
                .OrderByDescending(x => x.TradeNumber).Select(n => n.TradeNumber).FirstOrDefault() ?? string.Empty;
            if (reqModel.importTrades != null && reqModel.importTrades.Any())
            {
                //获取导入交易中该客户最大的交易编号记录
                var importTradeNumber = reqModel.importTrades.Where(x => x.TradeNumber.StartsWith(leftPart) && x.TradeNumber.Length == fullSize)
                    .OrderByDescending(x => x.TradeNumber).Select(n => n.TradeNumber).FirstOrDefault() ?? string.Empty;
                tradeNumber = tradeNumber.CompareTo(importTradeNumber) > 0 ? tradeNumber : importTradeNumber;
            }

            //获取总的该用户最大的交易编号记录
            int newNumber = string.IsNullOrWhiteSpace(tradeNumber) ? 1 : (int.Parse(tradeNumber.Substring(leftPart.Length)) + 1);

            if (newNumber < 1e3)
            {
                if (2017 <= date && date <= 2018)
                {
                    return leftPart + newNumber.ToString("D2");
                }
                return leftPart + newNumber.ToString("D3");
            }
            else
            {
                throw new Exception("该客户存在最大交易编号" + (newNumber - 1) + "，超出了限制规则999，生成交易编号失败");
            }
        }

    }
}