using System.Text.RegularExpressions;
using YLErp.BLL;

namespace YLErp.CustomizedBizLogic
{
    /// <summary>
    /// 上期资本
    /// </summary>
    class BizLogicSQ : BizLogicDefault
    {
        public override string GenerateTradeNumberBeforeConfirm(TradeNumberReqModel reqModel, YLContext db)
        {
            if (reqModel is null)
            {
                throw new ArgumentNullException(nameof(reqModel));
            }

            if (!string.IsNullOrWhiteSpace(reqModel.trade.TradeNumber)) { return reqModel.trade.TradeNumber; }
            lock (_clientCodeLock)
            {
                string code = "";

                var clientObj = GetClient(reqModel.clientId);

                if (clientObj == null)
                {
                    throw new Exception("未找到客户信息!");
                }
                if (!clientObj.ProtocolSignDate.HasValue)
                {
                    throw new Exception("生成合同编号失败，请先添加客户商品类协议签署日期!");
                }
                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!");
                }
                string prefix = $"{clientObj.Number}-JY-{reqModel.trade.TradeDate?.ToString("yyyyMMdd")}";

                var tradeNumbers =
                   db.trade
                   .Where(O =>
                       O.TradeNumber.StartsWith(prefix)
                       && O.ValidState != "InValid").Select(O => O.TradeNumber).OrderByDescending(O => O);
                var tradeNumber = tradeNumbers.FirstOrDefault();
                int tradeCount = 0;
                if (string.IsNullOrWhiteSpace(tradeNumber) || !int.TryParse(tradeNumber.Substring(prefix.Length), out tradeCount))
                {
                    tradeCount = 0;
                }
                do
                {
                    tradeCount++;
                    code = $"{prefix}{tradeCount:00}";
                } while (tradeNumbers.Contains(code));

                return code;
            }
        }

        public override void GenerateClientCode(Client clientObj, IQueryable<Client> clientDbQuery)
        {
            if (!string.IsNullOrEmpty(clientObj.Number)) { return; }
            if (!clientObj.ProtocolSignDate.HasValue)
            {
                throw new Exception("生成客户编号失败，请先添加客户商品类协议签署日期!");
            }
            lock (_clientCodeLock)
            {
                DateTime date = DateTime.Now;
                string code = "";
                string codePrefix = "SQCW[" + clientObj.ProtocolSignDate?.ToString("yyyyMMdd") + "]";// "OTC";

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

                int number = 0;
                if (!string.IsNullOrWhiteSpace(existingClientCode))
                {
                    Match maxCode = null;
                    if ((maxCode = Regex.Match(existingClientCode, @"\d+$")).Success)
                    {
                        number = int.Parse(maxCode.Value);
                    }
                }
                do
                {
                    number++;
                    code = codePrefix + number.ToString("0000");
                    if (!existingClientCodes.Contains(code))
                    { break; }
                } while (true);
                clientObj.Number = code;
            }
        }
    }
}