/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.values.storable;

import org.neo4j.hashing.HashFunction;
import org.neo4j.values.AnyValue;
import org.neo4j.values.utils.ValueMath;

public abstract class IntegralValue extends NumberValue {
    public static long safeCastIntegral(String name, AnyValue value, long defaultValue) {
        if (value == null || value == Values.NO_VALUE) {
            return defaultValue;
        }
        if (value instanceof IntegralValue) {
            return ((IntegralValue) value).longValue();
        }
        throw new IllegalArgumentException(name + " must be an integer value, but was a "
                + value.getClass().getSimpleName());
    }

    public abstract int intValue();

    public abstract short shortValue();

    public abstract byte byteValue();

    @Override
    public boolean equals(long x) {
        return longValue() == x;
    }

    @Override
    public boolean equals(double x) {
        return NumberValues.numbersEqual(x, longValue());
    }

    @Override
    protected final int computeHash() {
        return NumberValues.hash(longValue());
    }

    @Override
    public long updateHash(HashFunction hashFunction, long hash) {
        return hashFunction.update(hash, longValue());
    }

    @Override
    public boolean equalTo(Object other) {
        return other instanceof Value && equals((Value) other);
    }

    @Override
    public final boolean equals(Value other) {
        if (other instanceof IntegralValue that) {
            return this.longValue() == that.longValue();
        } else if (other instanceof FloatingPointValue that) {
            return NumberValues.numbersEqual(that.doubleValue(), this.longValue());
        } else {
            return false;
        }
    }

    @Override
    public int compareTo(IntegralValue other) {
        return Long.compare(longValue(), other.longValue());
    }

    @Override
    public int compareTo(FloatingPointValue other) {
        return NumberValues.compareLongAgainstDouble(longValue(), other.doubleValue());
    }

    @Override
    public NumberType numberType() {
        return NumberType.INTEGRAL;
    }

    @Override
    public double doubleValue() {
        return longValue();
    }

    @Override
    public LongValue minus(long b) {
        return ValueMath.subtract(longValue(), b);
    }

    @Override
    public DoubleValue minus(double b) {
        return ValueMath.subtract(longValue(), b);
    }

    @Override
    public LongValue plus(long b) {
        return ValueMath.add(longValue(), b);
    }

    @Override
    public DoubleValue plus(double b) {
        return ValueMath.add(longValue(), b);
    }

    @Override
    public LongValue times(long b) {
        return ValueMath.multiply(longValue(), b);
    }

    @Override
    public DoubleValue times(double b) {
        return ValueMath.multiply(longValue(), b);
    }

    @Override
    public LongValue dividedBy(long b) {
        return Values.longValue(longValue() / b);
    }

    @Override
    public DoubleValue dividedBy(double b) {
        return Values.doubleValue(doubleValue() / b);
    }
}
