/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.codehaus.groovy.runtime.typehandling;

/**
 * Arbitrary-precision integer arithmetic operations.
 * <p>
 * Singleton instance providing NumberMath implementations for BigInteger-based operations.
 * Supports exact integer arithmetic without overflow, with support for all bitwise operations.
 */
public final class BigIntegerMath extends NumberMath {

    /**
     * Singleton instance of BigIntegerMath.
     */
    public static final BigIntegerMath INSTANCE = new BigIntegerMath();

    private BigIntegerMath() {}

    @Override
    public Number absImpl(Number number) {
        return toBigInteger(number).abs();
    }

    @Override
    public Number addImpl(Number left, Number right) {
        return toBigInteger(left).add(toBigInteger(right));
    }
    @Override
    public Number subtractImpl(Number left, Number right) {
        return toBigInteger(left).subtract(toBigInteger(right));
    }

    @Override
    public Number multiplyImpl(Number left, Number right) {
        return toBigInteger(left).multiply(toBigInteger(right));
    }

    @Override
    public Number divideImpl(Number left, Number right) {
        return BigDecimalMath.INSTANCE.divideImpl(left, right);
    }

    @Override
    public int compareToImpl(Number left, Number right) {
        return toBigInteger(left).compareTo(toBigInteger(right));
    }

    @Override
    public Number intdivImpl(Number left, Number right) {
        return toBigInteger(left).divide(toBigInteger(right));
    }

    @Override
    public Number modImpl(Number left, Number right) {
        return toBigInteger(left).mod(toBigInteger(right));
    }

    @Override
    public Number remainderImpl(Number left, Number right) {
        return toBigInteger(left).remainder(toBigInteger(right));
    }

    @Override
    public Number unaryMinusImpl(Number left) {
        return toBigInteger(left).negate();
    }

    @Override
    public Number unaryPlusImpl(Number left) {
        return toBigInteger(left);
    }

    @Override
    public Number bitwiseNegateImpl(Number left) {
        return toBigInteger(left).not();
    }

    @Override
    public Number orImpl(Number left, Number right) {
        return toBigInteger(left).or(toBigInteger(right));
    }

    @Override
    public Number andImpl(Number left, Number right) {
        return toBigInteger(left).and(toBigInteger(right));
    }

    @Override
    public Number xorImpl(Number left, Number right) {
        return toBigInteger(left).xor(toBigInteger(right));
    }

    @Override
    public Number leftShiftImpl(Number left, Number right) {
        return toBigInteger(left).shiftLeft(right.intValue());
    }

    @Override
    public Number rightShiftImpl(Number left, Number right) {
        return toBigInteger(left).shiftRight(right.intValue());
    }
}
