import java.awt.Point;

/** 
 * Strategy that picks add locations at random.
 * @author Jeff Raab
 */
public class RandomStrategy extends ACraneStrategy {

    /** Constructs a random strategy. */
    public RandomStrategy() {}
    
    /** Returns the name of this. */
    public String getName() {
        return "Randomosity v1.0";
    }
    
    ///////////////////////
    // Protected methods //
    ///////////////////////
    
    /** 
     * Returns a random location at which 
     * to try to add the given parcel.
     * @param aParcel parcel to be added (ignored)
     */
    protected Point getAddLocation(Parcel aParcel) {
        int row = (int)(Math.random() * warehouse.getRowCount());
        int col = (int)(Math.random() * warehouse.getColumnCount());
        
        while (orderNumberAt(row, col) != -1) {
            row = (int)(Math.random() * warehouse.getRowCount());
            col = (int)(Math.random() * warehouse.getColumnCount());
        }
        
        return new Point(row, col);
    }

    /** 
     * Returns a location from which 
     * to remove a parcel in the given order.
     * @param anOrder order to be removed
     */
    protected Point getRemoveLocation(Order anOrder) {
        for (int i = 0; i < warehouse.getRowCount(); i++) {
            for (int j = 0; j < warehouse.getColumnCount(); j++) {
                if (orderNumberAt(i, j) == anOrder.number) {
                    return new Point(i, j);
                }
            }
        }
        
        return null;
    }
}