/*
 * Hedgewars for Android. An Android port of 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);
	}
}