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#include <QtCore>

#include <stdlib.h>

#include "tetrixpiece.h"

//! [0]

void TetrixPiece::setRandomShape()

{

    setShape(TetrixShape(qrand() % 7 + 1));

}

//! [0]

//! [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;

//! [1] //! [2]

}

//! [2]

//! [3]

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

//! [3] //! [4]

{

    int max = coords[0][0];

    for (int i = 1; i < 4; ++i)

        max = qMax(max, coords[i][0]);

    return max;

}

//! [4]

//! [5]

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

//! [5] //! [6]

{

    int max = coords[0][1];

    for (int i = 1; i < 4; ++i)

        max = qMax(max, coords[i][1]);

    return max;

}

//! [6]

//! [7]

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));

    }

//! [7]

    return result;

}

//! [9]

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));

    }

//! [9]

    return result;

}