package com.nq.utils;

import java.math.BigDecimal;
import java.math.RoundingMode;

public class TradeFeeUtil {

    /** 默认买入手续费率 0.0035 = 0.35% */
    public static final BigDecimal BUY_FEE_RATE = new BigDecimal("0.0035");

    private TradeFeeUtil() {
    }

    public static BigDecimal resolveBuyFeeRate(BigDecimal configured) {
        if (configured == null || configured.compareTo(BigDecimal.ZERO) <= 0) {
            return BUY_FEE_RATE;
        }
        return configured;
    }

    public static BigDecimal calcBuyFee(BigDecimal buyAmt) {
        return calcBuyFee(buyAmt, BUY_FEE_RATE);
    }

    public static BigDecimal calcBuyFee(BigDecimal buyAmt, BigDecimal feeRate) {
        if (buyAmt == null) {
            return BigDecimal.ZERO;
        }
        return buyAmt.multiply(resolveBuyFeeRate(feeRate)).setScale(2, RoundingMode.HALF_UP);
    }

    public static BigDecimal calcBuyFeeByNotional(BigDecimal notional, Integer lever, BigDecimal feeRate) {
        return calcBuyFee(notional, feeRate);
    }

    public static BigDecimal calcBuyFeeByNotional(BigDecimal notional, Integer lever) {
        return calcBuyFee(notional);
    }

    public static BigDecimal calcBuyDebit(BigDecimal margin, BigDecimal fee) {
        BigDecimal marginAmt = margin == null ? BigDecimal.ZERO : margin;
        BigDecimal feeAmt = fee == null ? BigDecimal.ZERO : fee;
        return marginAmt.add(feeAmt).setScale(2, RoundingMode.HALF_UP);
    }
}