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package de.rpgframework.genericrpg.modification;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.UUID;

import org.prelle.simplepersist.Attribute;
import org.prelle.simplepersist.ElementList;
import org.prelle.simplepersist.Root;

import de.rpgframework.genericrpg.Datable;
import de.rpgframework.genericrpg.data.Decision;
import de.rpgframework.genericrpg.data.IReferenceResolver;
import de.rpgframework.genericrpg.data.ReferenceException;

/**
 * A modification made to the current item it is attached to
 * @author prelle
 *
 */
@Root(name = "itemmod")
public class DataItemModification extends Modification implements Cloneable, Datable {

	@Attribute(name="ref", required = true)
	protected String ref;
	@Attribute
	protected String variant;
	@Attribute(name="choice", required = false)
	protected UUID choice;
	@Attribute
	protected boolean remove;
	/**
	 * For modifications with a choice, this can limit the options
	 */
	@Attribute(name="options")
	protected String choiceOptions;

	/**
	 * Identifier of mode when the modification applies.
	 * Prepend a '!' to express a mode that may NOT be active
	 */
	@Attribute(name="mode", required=false)
	protected String restrictedToMode;
	@ElementList(type = Decision.class, entry = "decision", inline = true)
	protected List decisions = new ArrayList<>();

	@Attribute
	protected int expCost;
	@Attribute
	protected Date date;
	/**
	 * May be used to identify automatically added elements - e.g.
	 * like a lifestyle added to a character - and therefore prevent
	 * duplicate additions
	 */
	@Attribute
	protected UUID id;

	//-------------------------------------------------------------------
	public DataItemModification() {
	}

	//-------------------------------------------------------------------
	public DataItemModification(ModifiedObjectType type, String ref) {
		this.type = type;
		this.ref  = ref;
	}

	//-------------------------------------------------------------------
 	public DataItemModification clone() {
   		return (DataItemModification) super.clone();
    }

	//-------------------------------------------------------------------
 	public boolean equals(Object o) {
 		if (o instanceof DataItemModification) {
 			DataItemModification other = (DataItemModification)o;
 			if (!super.equals(other)) return false;
 			if (ref!=null && !ref.equals(other.ref)) return false;
 			if (variant!=null && !variant.equals(other.variant)) return false;
 			return true;
 		}
 		return false;
 	}

	//-------------------------------------------------------------------
	/**
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return type+":"+ref+"(apply="+apply+",src="+source+")";
	}

	//-------------------------------------------------------------------
	public String getKey() {
		return ref;
	}

	//-------------------------------------------------------------------
	public void setKey(String key) {
		this.ref = key;
	}

	//-------------------------------------------------------------------
	public  T getResolvedKey() {
		return type.resolve(ref);
	}

	//-------------------------------------------------------------------
	public String[] getAsKeys() {
		return ref.trim().split(",");
	}

	//-------------------------------------------------------------------
	public UUID getConnectedChoice() {
		return choice;
	}

	//-------------------------------------------------------------------
	/**
	 * @see de.rpgframework.genericrpg.modification.Modification#validate()
	 */
	@Override
	public void validate() throws ReferenceException {
		if (ref.startsWith("CHOICE"))
			return;
		if ("ALL".equals(ref))
			return;
		if (type==null)
			throw new RuntimeException("Modification has no type= attribute: "+this);
		try {
			Object val = getResolvedKey();
			if (val==null && source instanceof IReferenceResolver) {
				val = ((IReferenceResolver)source).resolveItem(ref);
			}
			if (val==null && ref.contains(",")) {
				for (String k : getAsKeys()) {
					val = type.resolve(k.trim());
					if (val==null)
						throw new ReferenceException(type, k);
				}
			}
			if (val==null) {
				if (ref.equals(ref.toUpperCase()))
					return;
				throw new ReferenceException(type, ref);
			}
		} catch (ReferenceException e) {
			throw e;
		}

		// Validate decisions
		for (Decision dec : decisions) {
			UUID uuid = dec.getChoiceUUID();
			if (uuid==null)
				throw new RuntimeException("Decision without a choice UUID: "+this);
		}
	}

	//-------------------------------------------------------------------
	public List getDecisions() {
		return decisions;
	}

	//-------------------------------------------------------------------
	public Decision getDecision(UUID uuid) {
		for (Decision dec : decisions) {
			if (dec.getChoiceUUID().equals(uuid))
				return dec;
		}
		return null;
	}

	//-------------------------------------------------------------------
	public void setDecisions(List decisions) {
		this.decisions = decisions;
	}

	//-------------------------------------------------------------------
	/**
	 * @return the choiceOptions
	 */
	public String getChoiceOptions() {
		return choiceOptions;
	}

	//-------------------------------------------------------------------
	/**
	 * @return the expCost
	 */
	public int getExpCost() {
		return expCost;
	}

	//-------------------------------------------------------------------
	/**
	 * @param expCost the expCost to set
	 */
	public void setExpCost(int expCost) {
		this.expCost = expCost;
	}

	//-------------------------------------------------------------------
	/**
	 * @return the date
	 */
	public Date getDate() {
		return date;
	}

	//-------------------------------------------------------------------
	/**
	 * @param date the date to set
	 */
	public void setDate(Date date) {
		this.date = date;
	}

	//-------------------------------------------------------------------
	/**
	 * @return the remove
	 */
	public boolean isRemove() {
		return remove;
	}

	//-------------------------------------------------------------------
	/**
	 * @param remove the remove to set
	 */
	public void setRemove(boolean remove) {
		this.remove = remove;
	}

	//-------------------------------------------------------------------
	/**
	 * @return the variant
	 */
	public String getVariant() {
		return variant;
	}

	//-------------------------------------------------------------------
	/**
	 * @return the id
	 */
	public UUID getId() {
		return id;
	}
	public void setId(UUID id) {
		this.id =id;
	}

}