/*
 * Copyright (C) 2008-2015 by Holger Arndt
 *
 * This file is part of the Universal Java Matrix Package (UJMP).
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership and licensing.
 *
 * UJMP is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * UJMP 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with UJMP; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

package org.ujmp.core.doublematrix.calculation.general.statistical;

import org.ujmp.core.Matrix;
import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation;

public class IndexOfMin extends AbstractDoubleCalculation {
	private static final long serialVersionUID = -8301078828905448159L;

	public IndexOfMin(int dimension, Matrix matrix) {
		super(dimension, matrix);
	}

	public double getDouble(long... coordinates) {
		double min = Double.MAX_VALUE;
		long index = -1;
		switch (getDimension()) {
		case ROW:
			for (long r = getSource().getSize()[ROW] - 1; r != -1; r--) {
				double v = getSource().getAsDouble(r, coordinates[COLUMN]);
				if (v < min) {
					min = v;
					index = r;
				}
			}
			return index;
		case COLUMN:
			for (long c = getSource().getSize()[COLUMN] - 1; c != -1; c--) {
				double v = getSource().getAsDouble(coordinates[ROW], c);
				if (v < min) {
					min = v;
					index = c;
				}
			}
			return index;
		}
		return 0.0;
	}

	public long[] getSize() {
		switch (getDimension()) {
		case ROW:
			return new long[] { 1, getSource().getSize()[COLUMN] };
		case COLUMN:
			return new long[] { getSource().getSize()[ROW], 1 };
		}
		return null;
	}

}