package class5_1_DuckFactories_v7.swimBehaviors;

import class5_1_DuckFactories_v7.Duck;
import class5_1_DuckFactories_v7.DuckPond;

import java.awt.*;

public class StandardSwimming implements SwimBehavior {
    /**
     * The duck that uses this behavior
     */
    private final Duck parent;
    private Point currentPos = new Point(); // the duck's current position
    private Point increment = new Point(); // the duck's incremental movement

    public StandardSwimming(Duck parent) {
       this.parent = parent;
    }

    /**
     * Standard bounce-off-the-walls swimming
     */
    @Override
    public void swim() {
        if( (currentPos.x > (DuckPond.PONDSIZE-parent.image.getWidth(null))) // leaving the window's right edge
                || (currentPos.x < 0) ) { // ...or left edge
            increment.x = -increment.x; // reverse direction
            parent.quack(); // quack each time we reverse direction
        }

        if( (currentPos.y > (DuckPond.PONDSIZE-parent.image.getHeight(null)))  // leaving the window's top edge
                || (currentPos.y < 0) ) {//... or bottom edge
            increment.y = -increment.y; // reverse direction
        }

        currentPos.x += increment.x; // increment the position of the duck
        currentPos.y += increment.y;

        parent.setLocation(currentPos); // ...and update its location in the container
    }
}