/*

 * Hedgewars, a free turn based strategy game

 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 */

package org.hedgewars.hedgeroid;

import static org.hedgewars.hedgeroid.util.ObjectUtils.equal;

import java.util.Collections;

import java.util.LinkedList;

import java.util.List;

import java.util.Map;

import java.util.TreeMap;

import org.hedgewars.hedgeroid.RoomStateManager;

import org.hedgewars.hedgeroid.Datastructures.MapRecipe;

import org.hedgewars.hedgeroid.Datastructures.Scheme;

import org.hedgewars.hedgeroid.Datastructures.TeamInGame;

import org.hedgewars.hedgeroid.Datastructures.Weaponset;

/**

 * Common base implementation for a roomstate that will call listeners on every

 * change. The derived classes have to coordinate how state is changed to

 * complete the implementation of the RoomStateManager interface.

 * 

 * See {@link RoomStateManager} for a description of what this is for.

 */

public abstract class BasicRoomState implements RoomStateManager {

	private final List<RoomStateManager.Listener> observers = new LinkedList<RoomStateManager.Listener>();

	private boolean chief;

	private String gameStyle;

	private Scheme scheme;

	private MapRecipe map;

	private Weaponset weaponset;

	private Map<String, TeamInGame> teams = Collections.emptyMap();

	public final MapRecipe getMapRecipe() {

		return map;

	}

	public final boolean getChiefStatus() {

		return chief;

	}

	public final Scheme getScheme() {

		return scheme;

	}

	public final String getGameStyle() {

		return gameStyle;

	}

	public final Weaponset getWeaponset() {

		return weaponset;

	}

	public final Map<String, TeamInGame> getTeams() {

		return teams;

	}

	public final void setWeaponset(Weaponset weaponset) {

		if(!equal(weaponset, this.weaponset)) {

			this.weaponset = weaponset;

			for(RoomStateManager.Listener observer : observers) {

				observer.onWeaponsetChanged(weaponset);

			}

		}

	}

	public final void setMapRecipe(MapRecipe map) {

		if(!equal(map, this.map)) { 

			this.map = map;

			for(RoomStateManager.Listener observer : observers) {

				observer.onMapChanged(map);

			}

		}

	}

	public final void setGameStyle(String gameStyle) {

		if(!equal(gameStyle, this.gameStyle)) {

			this.gameStyle = gameStyle;

			for(RoomStateManager.Listener observer : observers) {

				observer.onGameStyleChanged(gameStyle);

			}

		}

	}

	public final void setScheme(Scheme scheme) {

		if(!equal(scheme, this.scheme)) {

			this.scheme = scheme;

			for(RoomStateManager.Listener observer : observers) {

				observer.onSchemeChanged(scheme);

			}

		}

	}

	public final void setChief(boolean chief) {

		if(chief != this.chief) {

			this.chief = chief;

			for(RoomStateManager.Listener observer : observers) {

				observer.onChiefStatusChanged(chief);

			}

		}

	}

	public final void putTeam(TeamInGame team) {

		TeamInGame oldEntry = teams.get(team.team.name);

		if(!equal(team, oldEntry)) {

			Map<String, TeamInGame> changedMap = new TreeMap<String, TeamInGame>(teams);

			changedMap.put(team.team.name, team);

			teams = Collections.unmodifiableMap(changedMap);

			for(RoomStateManager.Listener observer : observers) {

				observer.onTeamsChanged(teams);

			}

		}

	}

	public final void removeTeam(String teamname) {

		if(teams.containsKey(teamname)) {

			Map<String, TeamInGame> changedMap = new TreeMap<String, TeamInGame>(teams);

			changedMap.remove(teamname);

			teams = Collections.unmodifiableMap(changedMap);

			for(RoomStateManager.Listener observer : observers) {

				observer.onTeamsChanged(teams);

			}

		}

	}

	public final void setTeams(Map<String, TeamInGame> newTeams) {

		if(!newTeams.equals(teams)) {

			teams = Collections.unmodifiableMap(new TreeMap<String, TeamInGame>(newTeams));

			for(RoomStateManager.Listener observer : observers) {

				observer.onTeamsChanged(teams);

			}

		}

	}

	public final void addListener(Listener observer) {

		observers.add(observer);

	}

	public final void removeListener(Listener observer) {

		observers.remove(observer);

	}

}