package org.leumasjaffe.charsheet.model.skill;

import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.TreeMap;
import java.util.stream.Collectors;

import org.leumasjaffe.observer.Observable;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;

import lombok.AccessLevel;
import lombok.experimental.FieldDefaults;

@FieldDefaults(level=AccessLevel.PRIVATE, makeFinal=true)
public class DDSkills extends Observable.Instance {
	Map<String, DDSkill> skills = new TreeMap<>();
	
	@JsonCreator
	public DDSkills(Collection<DDSkill> in) {
		skills.putAll(DDSkillPrototype.all().collect(Collectors.toMap(t -> t.getName(), t -> new DDSkill(t))));
		skills.putAll(in.stream().collect(Collectors.toMap(t -> t.getName(), t -> t)));
	}
	
	@JsonValue
	private Collection<DDSkill> getSerial() {
		return skills.values().stream().filter(s -> s.getPointsSpent() > 0).collect(Collectors.toList());
	}

	public Collection<DDSkill> getSkills() {
		return Collections.unmodifiableCollection(skills.values());
	}

	public DDSkill getSkill(String name) {
		skills.computeIfAbsent(name, DDSkill::new);
		return skills.get(name);
	}
	
	public void removeSkill(DDSkill skill) {
		final DDSkill removed = skills.get(skill.getName());
		if (removed != null && !skill.equals(removed)) {
			throw new IllegalArgumentException("Attempting to remove a skill (" + skill.getName() + ") not in the object");
		}
		skills.remove(skill.getName());
	}
}