package example7_2.game;

import example7_2.game.characters.Flower;

import java.util.List;

/**
 * Moves toward the closest flower with at least 3 points
 * @author macavaneys
 *
 */
public class SmartMoveBehavior implements MoveBehavior {
	
	/**
	 * The minimum number of points required to target a flower
	 */
	private static int MINIMUM_TARGET_FLOWER_POINTS = 3;
	
	/**
	 * The character associated with this behavior
	 */
	private GameCharacter gc;
	
	/**
	 * Creates a new SmartMoveBehavior for the specified character
	 */
	public SmartMoveBehavior(GameCharacter character) {
		this.gc = character;
	}
	
	/**
	 * Moves to the closest flower with at least 3 points
	 */
	@Override
	public void planMove(List<GameCharacter> list) {
		// Find the closest flower with at least 3 points.
		GameCharacter targetCharacter = null;
		double targetCharacterDistance = Double.MAX_VALUE;
		for (GameCharacter character : list) {
			if (character instanceof Flower && character.getScore() >= MINIMUM_TARGET_FLOWER_POINTS) {
				// Target this flower if it is closer than the current target
				double distance = gc.distanceTo(character);
				if (distance < targetCharacterDistance) {
					targetCharacter = character;
					targetCharacterDistance = distance;
				}
			}
		}
		
		if (targetCharacter != null) {
			// Move to this flower
			gc.setTargetPosition(targetCharacter.getCurrentRow(), targetCharacter.getCurrentColumn()); // set the new target position; the Game framework will do the actual move
		}
		else { // targetCharacter == null
			// There's no acceptable flower, so don't move anywhere.
			gc.setTargetPosition(gc.getCurrentRow(), gc.getCurrentColumn());
		}
		
		Game.validateMove(gc);
	}
}