using YLErp.BLL;
using YLErp.Modules;

namespace YLErp.CustomizedBizLogic
{
    public  class BizLogicGXJY : BizLogicDefault
    {
     
        /// <summary>
        /// 生成客户编号 
        /// 生成规则：客户编号 CW21000001， CW开头，21代表年份，21年签约的客户，后面6位是累加。
        /// </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 prefix = "CW";

            const int leftPartSize = 4;//CW+year

            if (string.IsNullOrWhiteSpace(clientObj.Number) || clientObj.Number.IndexOf(prefix) != 0)
            {
                lock (_clientCodeLock)
                {
                    var leftPart = prefix + DateTime.Now.Year.ToString().Substring(2,2);
                    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(6, '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 clientMainProtocolCode = DataCacheProvider.GetClientDataSource().GetData(reqModel.clientId)?.MainProtocolCode.TrimToNull();
            if (string.IsNullOrEmpty(clientMainProtocolCode))
            {
                throw new ServiceException("找不到该数据主协议编号");
            }
            string preTag = clientMainProtocolCode ?? "N";
            //合并起来作为获取递增序号的取值条件
            var leftPart = preTag ;
            var fullSize = leftPart.Length + 3;

            //获取数据库该用户最大的交易编号记录
            var tradeNumbers = db.trade.Where(x => x.TradeNumber.StartsWith(leftPart) && x.TradeNumber.Length >= fullSize)
                .OrderByDescending(x => x.TradeNumber).Select(n => n.TradeNumber).ToList() ;
            var numberStrings = tradeNumbers.Select(x => x.Substring(leftPart.Length).IndexOf('-')>0? x.Substring(leftPart.Length).Remove(x.Substring(leftPart.Length).IndexOf('-')): x.Substring(leftPart.Length)).Where(x => int.TryParse(x, out var num));
            var number = numberStrings.LongCount()>0? numberStrings.Max(x => int.TryParse(x,out int a)?a:0):0;
            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;
                int importNumber = int.TryParse(importTradeNumber, out var i) ? i : 0;
                number = number> importNumber ? number : importNumber;
            }

            //获取总的该用户最大的交易编号记录
            int newNumber = number==0 ? 1 : (number + 1);
            //获取提前终止数量

            var tradeUnwindConfirmationNumbers = db.trade_contract_r.Where(l => l.TradeNumber.StartsWith(leftPart) && l.TradeNumber.Length >= fullSize && l.Type == "提前终止确认书" && l.IsValid).Select(n => n.ContractCode).ToList();
            var tradeUnwindConfirmationNumberStrings = tradeUnwindConfirmationNumbers.Select(x => x.Contains(leftPart) ? (x.Substring(leftPart.Length).IndexOf('-') > 0 ? x.Substring(leftPart.Length).Remove(x.Substring(leftPart.Length).IndexOf('-')) : x.Substring(leftPart.Length)) : "1").Where(x => int.TryParse(x, out var num));
            var tradeUnwindConfirmationCount = tradeUnwindConfirmationNumberStrings.Max(x => x);
            if (newNumber > (string.IsNullOrWhiteSpace(tradeUnwindConfirmationCount) ? 0 : (int.Parse(tradeUnwindConfirmationCount) + 1)))
            {
                return getTradeNumber(newNumber, leftPart, db);
            }
            else
            {
                return getTradeNumber(int.Parse(tradeUnwindConfirmationCount) + 1, leftPart, db);
            }
          
        }

        private string getTradeNumber(int newNumber, string leftPart, YLContext db)
        {
            if (newNumber < 1e3)
            {
                var childTradeNumberPart = leftPart + newNumber.ToString("D3") ;
                if (db.trade.Any(x => x.TradeNumber.Contains(childTradeNumberPart)&& db.trade_contract_r.Any(l => l.ContractCode.Contains(childTradeNumberPart)  && l.Type == "提前终止确认书" && l.IsValid) && x.ValidState != "InValid"))
                {
                    return getTradeNumber(newNumber + 1, leftPart, db);
                }
                else
                {
                    return leftPart + newNumber.ToString("D3");
                }
            }
            else
            {
                var childTradeNumberPart = leftPart + newNumber;
                if (db.trade.Any(x => x.TradeNumber.Contains(childTradeNumberPart) && db.trade_contract_r.Any(l => l.ContractCode.Contains(childTradeNumberPart) && l.Type == "提前终止确认书" && l.IsValid) && x.ValidState != "InValid"))
                {
                    return getTradeNumber(newNumber + 1, leftPart, db);
                }
                else
                {
                    return childTradeNumberPart;
                }
            }
        }
    }
}