package Tetris;
import java.util.Random;
import java.lang.Math;

import java.awt.*;

public class Shape {

    final static int NO_SHAPE = 0;
    final static int T_SHAPE = 1;
    final static int SQUARE = 2;
    final static int STICK = 3;
    final static int L_LEFT = 4;
    final static int L_RIGHT = 5;
    final static int DOG_LEFT = 6;
    final static int DOG_RIGHT = 7;

    private int pieceShape;
    private Point[] coords;
    private Point[][] coordsTable;

    public Shape() {
        coords = new Point[4];
        setShape(Shape.NO_SHAPE);
    }

    public void setShape(int shape) {

		coordsTable  = new Point[][]{
				{new Point(0, 0), new Point(0, 0), new Point(0, 0), new Point(0, 0)}, // no shape
				{new Point(0, 0), new Point(1, 0), new Point(1, 1), new Point(2, 0)}, // t-shape
				{new Point(0, 0), new Point(0, 1), new Point(1, 0), new Point(1, 1)}, // square
				{new Point(0, 0), new Point(0, 1), new Point(0, 2), new Point(0, 3)}, // stick
				{new Point(0, 0), new Point(1, 0), new Point(1, 1), new Point(1, 2)}, // l-shape left isomer
				{new Point(0, 0), new Point(0, 1), new Point(0, 2), new Point(1, 0)}, // l-shape right isomer
				{new Point(0, 1), new Point(1, 1), new Point(1, 0), new Point(2, 0)}, // dog left isomer
				{new Point(0, 0), new Point(1, 0), new Point(1, 1), new Point(2, 1)}, // dog right isomer
		};

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

    private void setX(int index, int x) { coords[index].x = x; }
    private void setY(int index, int y) { coords[index].y = y; }
    public int x(int index) { return coords[index].x; }
    public int y(int index) { return coords[index].y; }
    public int getShape()  { return pieceShape; }

    public void setRandomShape(){
        Random r = new Random();
        int x = Math.abs(r.nextInt()) % 7 + 1;
        setShape(x);
    }

    public int minX(){
      int m = coords[0].x;
      for (int i=0; i < 4; i++) {
          m = Math.min(m, coords[i].x);
      }
      return m;
    }

    public int minY() {
      int m = coords[0].y;
      for (int i=0; i < 4; i++) {
          m = Math.min(m, coords[i].y);
      }
      return m;
    }

    public Shape rotateLeft(){
        if (pieceShape == Shape.SQUARE)
            return this;

        Shape result = new Shape();
        result.pieceShape = pieceShape;

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

    public Shape rotateRight()
    {
        if (pieceShape == Shape.SQUARE)
            return this;

        Shape result = new Shape();
        result.pieceShape = pieceShape;

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