import java.awt.*; // use graphics

// This Sprite is a Right-facing Buggle which moves along the x-axis.
public class RightBuggle extends Sprite {
  
  // Instance Variables
  
  // variables to keep track of initial state of Buggle
  private Color c;     // color of Buggle
  private int size;   // size of Buggle
  private int startX; // initial x-coordinate of Buggle
  private int y;      // y-coordinate of Buggle (never changes)
  private int dx;     // distance Buggle moves in each frame
  // dx>0 moves Buggle to the right; dx<0 moves Buggle to the left (backwards)
  
  // variable to keep track of current state of Buggle
  private int currentX; // current x-coordinate of Buggle
  
  // Constructors
  public RightBuggle () {
    this.c = Color.red;
    this.size = 40;
    this.startX = 0;
    this.y = 0;
    this.dx = 5;
    this.resetState();
  }
  
  public RightBuggle (Color c, int size, int startX, int startY, int dx) {
    this.c = c;
    this.size = size;
    this.startX = startX;
    this.y = startY;
    this.dx = dx;
    this.resetState();
  }
  
  // Required Sprite methods
  protected void drawState (Graphics g) {
    Polygon p = new Polygon();
    p.addPoint(currentX, y);
    p.addPoint(currentX+size, y+size/2);
    p.addPoint(currentX, y+size);
    p.addPoint(currentX, y);
    g.setColor(c);
    g.fillPolygon(p);
    g.setColor(Color.black);
    g.drawPolygon(p);
  }
  
  protected void updateState () {
    currentX = currentX + dx;  
  }
  
  protected void resetState () {
    currentX = startX;
  }
  
  // For Debugging
  public String className () {
    return "RightBuggle";
  }
  
  public String toString () {
    return className() + ":" + getName()
                  + "[color="+c
                  + "; size="+size
                  + "; startX="+startX
                  + "; startY="+y
                  + "; dx="+dx
                  + "]";
  }
  
  public String getState () {
    return className() + ":" + getName()
                  + "[currentX="+currentX
                  + "]";
  }
  
}