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CactusServer / src / main / java / cactusServer / models / Instances.java
package cactusServer.models;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;

import cactusServer.entities.Angle;
import cactusServer.entities.CameraState;
import cactusServer.entities.EmoteState;
import cactusServer.entities.IDAddressedEntity;
import cactusServer.entities.Instance;
import cactusServer.entities.Player;
import cactusServer.utils.RandomStringGenerator;

/**
 * インスタンスを管理するクラス
 * 
 * @author r-isitani
 *
 */
public class Instances {
	private static Instances theInstance = null;
	private HashMap<String, Instance> instanceMap = new HashMap<>(); // instanceのIDと実体を管理
	private HashMap<String, Player> playerMap = new HashMap<>();

	private Instances() {

	}

	/**
	 * Instancesクラスを取得する (シングルトン)
	 * 
	 * @return
	 */
	public static Instances getInstance() {
		if (theInstance == null) {
			theInstance = new Instances();
		}
		return theInstance;
	}

	public IDAddressedEntity createInstance(String name, String stageID) {
		String id = RandomStringGenerator.generateUniqueString(Instance.UNIQUE_ID_LENGTH,
				RandomStringGenerator.ALPHA_NUMERIC, instanceMap.keySet());
		Instance instance = new Instance(name, Instance.State.AVAILABLE, stageID);
		instanceMap.put(id, instance);
		return new IDAddressedEntity(id, instance);
	}
	
	/**
	 * InstanceRestとのエラー解消用 (後で消す)
	 */
	public IDAddressedEntity createInstance(String name, Instance.State state, String stageID) {
		String id = RandomStringGenerator.generateUniqueString(Instance.UNIQUE_ID_LENGTH,
				RandomStringGenerator.ALPHA_NUMERIC, instanceMap.keySet());
		Instance instance = new Instance(name, state, stageID);
		instanceMap.put(id, instance);
		return new IDAddressedEntity(id, instance);
	}

	public IDAddressedEntity createPlayer(String instanceURI, String characterURI, CameraState cameraState,
			EmoteState.EmoteType animationClassToStart) {
		String id = RandomStringGenerator.generateUniqueString(Player.UNIQUE_ID_LENGTH,
				RandomStringGenerator.ALPHA_NUMERIC, playerMap.keySet());
		Player player = new Player(instanceURI, characterURI, cameraState, animationClassToStart);
		playerMap.put(id, player);
		return new IDAddressedEntity(id, player);
	}
	
	public List<Instance> getInstances() {
		return new ArrayList<Instance>(instanceMap.values());
	}

	/**
	 * IDに対応するInstanceを取得して返す
	 * 
	 * @param instanceId
	 *            取得したいInstanceのID
	 * @return IDに対応するInstance
	 */
	public Instance getInstance(String instanceId) {
		return instanceMap.get(instanceId);
	}

	/**
	 * 全playerを返す
	 * @return
	 */
	public List<Player> getPlayers() {
		return new ArrayList<Player>(playerMap.values());
	}
	
	/**
	 * IDに対応するinstanceにいる全playerを返す
	 * @param instanceId
	 * @return
	 */
	public List<Player> getPlayers(String instanceId) {
		if (instanceId == null || instanceId.isEmpty()) {
			return getPlayers();
		}
		List<Player> responsePlayers = new ArrayList<>();
		for (Player player : playerMap.values()) {
			String[] instanceURISplit = player.getInstanceURI().split("/"); // …/instances/{instanceId}
			if (instanceId.equals(instanceURISplit[instanceURISplit.length - 1])) {
				responsePlayers.add(player);
			}
		}
		return responsePlayers;
	}

	public Player getPlayer(String playerId) {
		return playerMap.get(playerId);
	}

	public Instance updateInstance(String instanceId, Instance.State state) {
		Instance instance = instanceMap.get(instanceId);
		instance.update(state);
		return instance;
	}
	
	public Player updatePlayer(String playerId, String characterURI, Position3D position, Quaternion3D angle,
			CameraState cameraState, EmoteState.EmoteType animationClassToStart) {
		Player player = playerMap.get(playerId);
		player.update(characterURI, position, angle, cameraState, animationClassToStart);
		return player;
	}

	/**
	 * IDに対応するInstanceをMapから削除して返す
	 * 
	 * @param instanceId
	 *            Instanceを識別する一意のID
	 * @return Mapから削除されたInstance
	 */
	public Instance destroyInstance(String instanceId) {
		return instanceMap.remove(instanceId);
	}

	public Player destroyPlayer(String playerId) {
		Player player = playerMap.get(playerId);
		player.destroy();
		return playerMap.remove(playerId);
	}
}