package schedframe.resources.units;

import schedframe.resources.units.ResourceUnitType;
import schedframe.scheduling.utils.ResourceParameterName;

/**
 * Class representing concrete amount (values) of specific resource unit
 * 
 * @author Ariel
 *
 */
public abstract class ResourceUnit implements Comparable<ResourceUnit>, Cloneable {

	protected ResourceParameterName unitName;
	
	protected ResourceUnitType resourceType;;

	protected String resourceId;

		
	private int id;
	
	protected static int id_ = 0;

	
	protected synchronized void setId(){
		this.id = id_;
		id_++;
	}
	
	public ResourceUnit(ResourceUnit unit){
		this.unitName = unit.unitName;
		this.resourceType = unit.resourceType;
		this.resourceId = unit.resourceId;
		this.id = unit.id;
	}
	
	public ResourceUnit(ResourceParameterName name) {
		unitName = name;
		resourceId = "";
		resourceType = ResourceUnitType.CONTINUOUS_RESOURCE;
		setId();
	}

	public ResourceUnit(String resId, ResourceParameterName name) {
		this(name);
		resourceId = resId;
	}
	
	public int getId(){
		return id;
	}
	
	public ResourceParameterName getName() {
		return unitName;
	}

	public String getResourceId() {
		return resourceId;
	}
	
	public boolean areValuesUnique(){
		return false;
	}

	/**
	 * Returns resource unit type; if equals DISCRETE_RESOURCE the DiscreteResourceUnit subclass 
	 * must be used to obtain information about specific allocations
	 * @return ResourceUnitType object
	 */
	public ResourceUnitType getResourceUnitType() {
		return this.resourceType;
	}
	
	public String toString(){
		return getName() + " total/used/free amount=" + getAmount() + "/" + getUsedAmount() + "/" + getFreeAmount();
	}
	
	public boolean equals(Object o){
		if(o instanceof ResourceUnit){
			ResourceUnit unit = (ResourceUnit) o;
			if(this.unitName != unit.getName()) return false;
			if(! this.resourceId.equals(unit.getResourceId())) return false;
			if(this.getFreeAmount() != unit.getFreeAmount()) return false;
			if(this.getUsedAmount() != unit.getUsedAmount()) return false;
			return true;
		} else {
			return false;
		}
	}
	
	public Object clone(){
		Object obj = null;
		try {
			obj = super.clone();
		} catch (CloneNotSupportedException e) {
			e.printStackTrace();
		}
		return obj;
	}
	
	public void reset(){};
	
	public abstract int getFreeAmount() ;

	public abstract int getUsedAmount();
	
	public abstract int getAmount();
	
	public abstract void setUsedAmount(int amount);
	
	public abstract ResourceUnit toDiscrete() throws ClassNotFoundException;
	
}