package classes;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Predicate;
/**
 * Representative of a flexibility for a HolonElement.
 *
 */
public class Flexibility {
	/** How fast in TimeSteps the Flexibility can be activated. */
	public int speed;
	/** How high the cost for a activation are. */
	public float cost;
	/** SHould this Flexibility be Offered when is constrainList is fulfilled the flexibility can be activated.*/
	public boolean offered;
	/** The Duration in TimeSteps how long the Flexibility is activated.*/
	private int duration;
	/** The Duration after a successful activation between the next possible activation.*/
	private int cooldown;
	/** The Element this flexibility is assigned.*/
	private HolonElement element;
	/** The List of Constrains the Flexibility */
	public List<Predicate<Flexibility>> constrainList;
	
	
	public Flexibility(HolonElement element){
		this(0 , 0.f, 1, 0, false, element);		
	}
	public Flexibility(int speed, float cost, int duration, int cooldown, boolean offered, HolonElement element){
		this.speed = speed;
		this.cost = cost;
		setDuration(duration);
		setCooldown(cooldown);
		this.offered=offered;
		this.element = element;
		constrainList = new ArrayList<Predicate<Flexibility>>();		
	}
	
	
	/** Checks if all assigned constrains are fulfilled. When no constrains assigned returns true.*/
	public boolean fulfillsConstrains() {
		return constrainList.stream().reduce(Predicate::and).orElse(f -> true).test(this);
	}
	
	public HolonElement getElement() {
		return element;
	}

	public int getDuration() {
		return duration;
	}
	/** Minimum duration is 1 TimeStep.*/
	public void setDuration(int duration) {
		this.duration = Math.max(1, duration);
	}

	public int getCooldown() {
		return cooldown;
	}
	/** No negative cooldown TimeSteps.*/
	public void setCooldown(int cooldown) {
		this.cooldown = Math.max(0, cooldown);
	}

	/** returns the total energy Amount accumulated over the TimeSteps.*/
	public float magnitude() {
		return ((float)duration) *  element.getEnergyPerElement();
	}
	
	
	//Example Constrains:
	/** Flexibility should be offered when Element is active.*/
	public Predicate<Flexibility> onConstrain = f 	-> 	f.getElement().isActive();
	/** Flexibility should be offered when Element is inactive.*/
	public Predicate<Flexibility> offConstrain = f	-> 	!f.getElement().isActive();
	
	
	
}