/*
 * 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.bytematrix.impl;

import org.ujmp.core.Matrix;
import org.ujmp.core.bytematrix.stub.AbstractDenseByteMatrix2D;
import org.ujmp.core.doublematrix.impl.DefaultDenseDoubleMatrix2D;
import org.ujmp.core.interfaces.HasColumnMajorByteArray1D;
import org.ujmp.core.util.MathUtil;

public class DefaultDenseByteMatrix2D extends AbstractDenseByteMatrix2D implements
		HasColumnMajorByteArray1D {
	private static final long serialVersionUID = -7637602510970244322L;

	private final byte[] values;
	private final int rows;
	private final int cols;

	public DefaultDenseByteMatrix2D(Matrix m) {
		super(m.getRowCount(), m.getColumnCount());
		this.rows = MathUtil.longToInt(m.getRowCount());
		this.cols = MathUtil.longToInt(m.getColumnCount());
		if (m instanceof DefaultDenseByteMatrix2D) {
			byte[] v = ((DefaultDenseByteMatrix2D) m).values;
			this.values = new byte[v.length];
			System.arraycopy(v, 0, this.values, 0, v.length);
		} else {
			this.values = new byte[rows * cols];
			for (long[] c : m.allCoordinates()) {
				setByte(m.getAsByte(c), c);
			}
		}
	}

	public DefaultDenseByteMatrix2D(int rows, int cols) {
		super(rows, cols);
		this.rows = rows;
		this.cols = cols;
		this.values = new byte[rows * cols];
	}

	public DefaultDenseByteMatrix2D(byte[] v, int rows, int cols) {
		super(rows, cols);
		this.rows = rows;
		this.cols = cols;
		this.values = v;
	}

	public byte getByte(long row, long column) {
		return values[(int) (column * rows + row)];
	}

	public void setByte(byte value, long row, long column) {
		values[(int) (column * rows + row)] = value;
	}

	public byte getByte(int row, int column) {
		return values[column * rows + row];
	}

	public void setByte(byte value, int row, int column) {
		values[column * rows + row] = value;
	}

	public final Matrix plus(double v) {
		double[] result = new double[values.length];
		for (int i = result.length; --i != -1;) {
			result[i] = values[i] + v;
		}
		return new DefaultDenseDoubleMatrix2D(result, rows, cols);
	}

	public final Matrix minus(double v) {
		double[] result = new double[values.length];
		for (int i = result.length; --i != -1;) {
			result[i] = values[i] - v;
		}
		return new DefaultDenseDoubleMatrix2D(result, rows, cols);
	}

	public final Matrix times(double v) {
		double[] result = new double[values.length];
		for (int i = result.length; --i != -1;) {
			result[i] = values[i] * v;
		}
		return new DefaultDenseDoubleMatrix2D(result, rows, cols);
	}

	public final Matrix divide(double v) {
		double[] result = new double[values.length];
		for (int i = result.length; --i != -1;) {
			result[i] = values[i] / v;
		}
		return new DefaultDenseDoubleMatrix2D(result, rows, cols);
	}

	public final Matrix copy() {
		byte[] result = new byte[values.length];
		System.arraycopy(values, 0, result, 0, values.length);
		Matrix m = new DefaultDenseByteMatrix2D(result, rows, cols);
		if (getMetaData() != null) {
			m.setMetaData(getMetaData().clone());
		}
		return m;
	}

	public final Matrix transpose() {
		final byte[] result = new byte[cols * rows];
		for (int c = rows; --c != -1;) {
			for (int r = cols; --r != -1;) {
				result[c * cols + r] = values[r * rows + c];
			}
		}
		return new DefaultDenseByteMatrix2D(result, cols, rows);
	}

	public byte[] getColumnMajorByteArray1D() {
		return values;
	}

}