/*
 * The MIT License (MIT)
 * ---------------------
 *
 * Copyright (c) 2015-2016 Cristatus Solutions
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package test.cristatus.core;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.MathContext;
import java.util.Random;

/**
 * @author Subhomoy Haldar
 * @version 1.0
 */
class TestUtils {
    private static final int BIT_BOUND = 4_000;
    private static final int SCALE_BOUND = 10_000;

    static BigInteger getOneIfZero(BigInteger integer) {
        return integer.signum() == 0 ? BigInteger.ONE : integer;
    }

    static int getOneIfZero(int integer) {
        return integer == 0 ? 1 : integer;
    }

    static long getOneIfZero(long integer) {
        return integer == 0 ? 1 : integer;
    }

    static float getOneIfZero(float fraction) {
        return fraction == 0 ? 1 : fraction;
    }

    static double getOneIfZero(double fraction) {
        return fraction == 0 ? 1 : fraction;
    }

    static BigDecimal getRandomBigDecimal(Random random, MathContext context) {
        return new BigDecimal(
                new BigInteger(BIT_BOUND, random),
                random.nextInt(SCALE_BOUND) *
                        (random.nextBoolean() ? -1 : 1),
                context
        ).stripTrailingZeros();
    }

    static BigInteger getRandomBigInteger(Random random) {
        return new BigInteger(BIT_BOUND, random);
    }

    static MathContext getContextFor(BigInteger integer, int root) {
        return new MathContext(integer.toString().length() + root);
    }
}
