using YLErp.DBModels;
using YLErp.DBModels.Consts;

namespace YLErp.Modules.SwapModule;

/// <summary>
/// 平仓手续费计算——纯 static，无 this 依赖。
/// 从 SwapDealService 提取，零行为变更。
/// </summary>
public static class TradingFeeCalc
{
    public static decimal CalcInitTradingFee(swap_position oriPosition, UnwindData unwindData)
    {
        if (oriPosition == null || unwindData == null)
        {
            return 0;
        }

        if (oriPosition.PosiFeeType == 1)
        {
            return Math.Round(oriPosition.PosiTradingFeeUnit * unwindData.CloseQty, ConsGlobal.MoneyRound, MidpointRounding.AwayFromZero);
        }

        return Math.Round(oriPosition.PosiTradingFeeUnit / 100m * unwindData.CloseNotionalValue, ConsGlobal.MoneyRound, MidpointRounding.AwayFromZero);
    }

    public static decimal CalcInitTradingFeePending(swap_position oriPosition, swap_position position, UnwindData unwindData)
    {
        if (oriPosition == null || unwindData == null || oriPosition.PosiTradingFeeUnit == 0)
        {
            return position?.PosiTradingFeePending ?? 0;
        }

        var closeBase = oriPosition.PosiFeeType == 1 ? unwindData.CloseQty : unwindData.CloseNotionalValue;
        var originalBase = oriPosition.PosiFeeType == 1 ? unwindData.NotionalQty : unwindData.NotionalValue;
        if (originalBase <= 0)
        {
            return position?.PosiTradingFeePending ?? 0;
        }

        return Math.Round(oriPosition.PosiTradingFeePending * closeBase / originalBase, ConsGlobal.MoneyRound, MidpointRounding.AwayFromZero);
    }
}