import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.Timer;
import java.util.Random;

public class World extends JPanel implements KeyListener, ActionListener {
  Timer timer; 
  Shape[] board; 
  public World(Game parent) {
    parent.addKeyListener(this);
    timer = new Timer(400, this); 
    board = new Shape[BoardWidth * BoardHeight];
  }
  Shape shapeAt(int x, int y) { return board[(y * BoardWidth) + x]; }
  public void keyPressed(KeyEvent e) { System.out.println( "... Key pressed: " + e ); 
  
     int keycode = e.getKeyCode();
     
     switch (keycode) {
             case KeyEvent.VK_LEFT:
                 shape.tryMove(shape.curX - 1, shape.curY);
                 break;
             case KeyEvent.VK_RIGHT:
                 shape.tryMove(shape.curX + 1, shape.curY);
                 break;
             }
  
  }
  public void keyReleased(KeyEvent e) { System.out.println( "... Key typed: " + e ); }
  public void keyTyped(KeyEvent e) { System.out.println( "... Key typed: " + e ); }
  public void start() {
    this.timer.start(); 
  }
  boolean isFallingFinished = true; 
  public void actionPerformed(ActionEvent e) {
    if (isFallingFinished) {
      isFallingFinished = false;
      newPiece();
    } else {
      oneLineDown();
    }
  }
  Shape shape; 
  private void newPiece() 
  {
    shape = randomShape(); 
    System.out.println( shape );
    if (! shape.tryMove(BoardWidth / 2 + 1, BoardHeight - 1 + shape.minY())) {
      // curPiece.setShape(Tetrominoes.NoShape);
      timer.stop();
      // isStarted = false;
      // statusbar.setText("game over");
      System.exit(0); 
    }
    // this.repaint(); 
    count = 0;
  }
  
  Shape randomShape()
  {
    Random r = new Random();
    int x = Math.abs(r.nextInt()) % 7 + 1;
    int type = (int) (Math.random() * 8);
    switch (type) {
      // case 0: return new NoShape(this);     
      case 1: return new LShape(this);         
      case 2: return new MirroredLShape(this); 
      case 3: return new LineShape(this);      
      case 4: return new SquareShape(this);    
      case 5: return new SShape(this);         
      case 6: return new ZShape(this);         
      case 7: return new TShape(this);         
    }
    return new NoShape(this); 
  }
  int count = 0; 
  private void oneLineDown() {
    if (! (shape.tryMove(shape.curX, shape.curY - 1)))
      pieceDropped();
    count += 1; 
    System.out.println( count ); 
    if (count == 20) {
      isFallingFinished = true; 
    }
  }
  private void pieceDropped() {
  //      for (int i = 0; i < 4; ++i) {
  //          int x = curX + curPiece.x(i);
  //          int y = curY - curPiece.y(i);
  //          board[(y * BoardWidth) + x] = curPiece.getShape();
  //      }
  //      removeFullLines();
  //      if (!isFallingFinished)
  //          newPiece();
  }
  public void paint(Graphics g) {
    super.paint(g); 
    // for (Shape shape : shapes) shape.draw(g);   
    if (shape != null) 
      shape.draw(g); 
  } 
  int squareWidth() { return (int) getSize().getWidth() / BoardWidth; }
  int squareHeight() { return (int) getSize().getHeight() / BoardHeight; }
  final int BoardWidth = 10;
  final int BoardHeight = 22; 
}