import draw.*;

class FaceWorld extends World {
  boolean draw() {
    return this.theCanvas.start(100, 100) &&
           new Face().draw(this);
  }

  boolean erase() {
    return this.theCanvas.drawRect(new Posn(0,0),100,100,new White());
  }

  World onKeyEvent( String key ) {
    return this;
  }
  World onTick() {
    return this;
  }

}

abstract class Shape {
  abstract boolean draw( World w );
}

class Disk extends Shape {
  Posn center;
  int radius;
  Color c;

  Disk( Posn center, int radius, Color c) {
   this.center = center;
   this.radius = radius;
   this.c = c;
  }

  boolean draw( World w ) {
    return w.theCanvas.drawDisk(this.center,this.radius,this.c);
  }
}

class Rectangle extends Shape {
  Posn topLeftCorner;
  int width;
  int height;
  Color c;

  Rectangle( Posn topLeft, int width, int height, Color c) {
   this.topLeftCorner = topLeft;
   this.width = width;
   this.height = height;
   this.c = c;
  }

  boolean draw( World w ) {
    return w.theCanvas.drawRect(topLeftCorner,width,height,c);
  }
}

class Face extends Shape {
  Shape base = new Disk(new Posn(50,50), 50, new Yellow());
  Shape leftEye = new Eye(new Posn(30,30), new Blue());
  Shape rightEye = new Eye(new Posn(70,30), new Blue());
  Shape nose = new Nose(new Posn(50,50), new Red());
  Shape mouth = new Mouth( new Posn(50,75), new Red(), new Yellow());

  Face() { }
  
  boolean draw( World w ) {
    return base.draw(w) && leftEye.draw(w) && rightEye.draw(w) && nose.draw(w) && mouth.draw(w);
  }
}

class Eye extends Shape {
  Shape iris;
  Shape pupil;
  Eye( Posn center, Color irisColor ) {
   this.iris = new Disk( center, 10, irisColor );
   this.pupil = new Disk( center, 5, new Black() );
  }

  boolean draw( World w ) {
    return iris.draw(w) && pupil.draw(w);
  }
}

class Nose extends Shape {
  Shape n;
  Nose( Posn center, Color c) {
   this.n = new Disk( center, 8, c);
  }
  
  boolean draw( World w) {
    return n.draw(w);
  }
}

class Mouth extends Shape {
  Shape base;
  Shape cover;

  Mouth ( Posn center, Color mouthColor, Color baseColor ) {
   this.base = new Disk(center, 15, mouthColor);
   this.cover = new Rectangle(new Posn(center.x-20,center.y-20), 40, 20, baseColor);
  }

  boolean draw( World w ) {
   return this.base.draw(w) && this.cover.draw(w);
  }
}