/****************************************************************************
**
** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. 
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
** you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** In addition, as a special exception, Trolltech, as the sole
** copyright holder for Qt Designer, grants users of the Qt/Eclipse
** Integration plug-in the right for the Qt/Eclipse Integration to
** link to functionality provided by Qt Designer and its related
** libraries.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
** granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include <QtCore>

#include <stdlib.h>

#include "tetrixpiece.h"

void TetrixPiece::setRandomShape()
{
    setShape(TetrixShape(qrand() % 7 + 1));
}

void TetrixPiece::setShape(TetrixShape shape)
{
    static const int coordsTable[8][4][2] = {
        { { 0, 0 },   { 0, 0 },   { 0, 0 },   { 0, 0 } },
        { { 0, -1 },  { 0, 0 },   { -1, 0 },  { -1, 1 } },
        { { 0, -1 },  { 0, 0 },   { 1, 0 },   { 1, 1 } },
        { { 0, -1 },  { 0, 0 },   { 0, 1 },   { 0, 2 } },
        { { -1, 0 },  { 0, 0 },   { 1, 0 },   { 0, 1 } },
        { { 0, 0 },   { 1, 0 },   { 0, 1 },   { 1, 1 } },
        { { -1, -1 }, { 0, -1 },  { 0, 0 },   { 0, 1 } },
        { { 1, -1 },  { 0, -1 },  { 0, 0 },   { 0, 1 } }
    };

    for (int i = 0; i < 4 ; i++) {
        for (int j = 0; j < 2; ++j)
            coords[i][j] = coordsTable[shape][i][j];
    }
    pieceShape = shape;
}

int TetrixPiece::minX() const
{
    int min = coords[0][0];
    for (int i = 1; i < 4; ++i)
        min = qMin(min, coords[i][0]);
    return min;
}

int TetrixPiece::maxX() const
{
    int max = coords[0][0];
    for (int i = 1; i < 4; ++i)
        max = qMax(max, coords[i][0]);
    return max;
}

int TetrixPiece::minY() const
{
    int min = coords[0][1];
    for (int i = 1; i < 4; ++i)
        min = qMin(min, coords[i][1]);
    return min;
}

int TetrixPiece::maxY() const
{
    int max = coords[0][1];
    for (int i = 1; i < 4; ++i)
        max = qMax(max, coords[i][1]);
    return max;
}

TetrixPiece TetrixPiece::rotatedLeft() const
{
    if (pieceShape == SquareShape)
        return *this;

    TetrixPiece result;
    result.pieceShape = pieceShape;
    for (int i = 0; i < 4; ++i) {
        result.setX(i, y(i));
        result.setY(i, -x(i));
    }
    return result;
}

TetrixPiece TetrixPiece::rotatedRight() const
{
    if (pieceShape == SquareShape)
        return *this;

    TetrixPiece result;
    result.pieceShape = pieceShape;
    for (int i = 0; i < 4; ++i) {
        result.setX(i, -y(i));
        result.setY(i, x(i));
    }
    return result;
}
