package class2_1_DuckStrategies_v8_FactoryMethodPattern.ducks;

import class2_1_DuckStrategies_v8_FactoryMethodPattern.DuckPond;
import class2_1_DuckStrategies_v8_FactoryMethodPattern.SwimBehavior;

public class StandardSwimming implements SwimBehavior {
    /**
     * The duck that uses this behavior
     */
    private final Duck parent;

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

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

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

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

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