/*
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package silentium.gameserver.ai;

import java.util.List;

import silentium.gameserver.ThreadPoolManager;
import silentium.gameserver.data.xml.NpcWalkerRoutesData;
import silentium.gameserver.model.L2CharPosition;
import silentium.gameserver.model.L2NpcWalkerNode;
import silentium.gameserver.model.actor.L2Character;
import silentium.gameserver.model.actor.instance.L2NpcWalkerInstance;

public class NpcWalkerAI extends CharacterAI implements Runnable
{
	private static final int DEFAULT_MOVE_DELAY = 0;
	private long _nextMoveTime;
	private boolean _walkingToNextPoint = false;
	int _homeX, _homeY, _homeZ;
	private final List<L2NpcWalkerNode> _route;
	private int _currentPos;

	/**
	 * Constructor of CharacterAI.<BR>
	 * <BR>
	 * 
	 * @param accessor
	 *            The AI accessor of the L2Character
	 */
	public NpcWalkerAI(L2Character.AIAccessor accessor)
	{
		super(accessor);

		_route = NpcWalkerRoutesData.getInstance().getRouteForNpc(getActor().getNpcId());

		if (_route != null)
			ThreadPoolManager.getInstance().scheduleAiAtFixedRate(this, 1000, 1000);
		else
			_log.warn(getClass().getSimpleName() + ": Missing route data for NpcID: " + _actor);
	}

	@Override
	public void run()
	{
		onEvtThink();
	}

	@Override
	protected void onEvtThink()
	{
		if (isWalkingToNextPoint())
		{
			checkArrived();
			return;
		}

		if (_nextMoveTime < System.currentTimeMillis())
			walkToLocation();
	}

	/**
	 * If npc can't walk to it's target then just teleport to next point
	 * 
	 * @param blocked_at_pos
	 *            ignoring it
	 */
	@Override
	protected void onEvtArrivedBlocked(L2CharPosition blocked_at_pos)
	{
		_log.warn("NpcWalker ID: " + getActor().getNpcId() + ": Blocked at rote position [" + _currentPos + "], coords: " + blocked_at_pos.x + ", " + blocked_at_pos.y + ", " + blocked_at_pos.z + ". Teleporting to next point");

		int destinationX = _route.get(_currentPos).getMoveX();
		int destinationY = _route.get(_currentPos).getMoveY();
		int destinationZ = _route.get(_currentPos).getMoveZ();

		getActor().teleToLocation(destinationX, destinationY, destinationZ, false);
		super.onEvtArrivedBlocked(blocked_at_pos);
	}

	private void checkArrived()
	{
		int destinationX = _route.get(_currentPos).getMoveX();
		int destinationY = _route.get(_currentPos).getMoveY();
		int destinationZ = _route.get(_currentPos).getMoveZ();

		if (getActor().isInsideRadius(destinationX, destinationY, destinationZ, 5, false, false))
		{
			String chat = _route.get(_currentPos).getChatText();
			if (chat != null && !chat.isEmpty())
				getActor().broadcastChat(chat);

			// time in millis
			long delay = _route.get(_currentPos).getDelay() * 1000;

			// sleeps between each move
			if (delay <= 0)
				delay = DEFAULT_MOVE_DELAY;

			_nextMoveTime = System.currentTimeMillis() + delay;
			setWalkingToNextPoint(false);
		}
	}

	private void walkToLocation()
	{
		if (_currentPos < (_route.size() - 1))
			_currentPos++;
		else
			_currentPos = 0;

		boolean moveType = _route.get(_currentPos).getRunning();

		/**
		 * false - walking true - Running
		 */
		if (moveType)
			getActor().setRunning();
		else
			getActor().setWalking();

		// now we define destination
		int destinationX = _route.get(_currentPos).getMoveX();
		int destinationY = _route.get(_currentPos).getMoveY();
		int destinationZ = _route.get(_currentPos).getMoveZ();

		// notify AI of MOVE_TO
		setWalkingToNextPoint(true);

		setIntention(CtrlIntention.AI_INTENTION_MOVE_TO, new L2CharPosition(destinationX, destinationY, destinationZ, 0));
	}

	@Override
	public L2NpcWalkerInstance getActor()
	{
		return (L2NpcWalkerInstance) super.getActor();
	}

	public int getHomeX()
	{
		return _homeX;
	}

	public int getHomeY()
	{
		return _homeY;
	}

	public int getHomeZ()
	{
		return _homeZ;
	}

	public void setHomeX(int homeX)
	{
		_homeX = homeX;
	}

	public void setHomeY(int homeY)
	{
		_homeY = homeY;
	}

	public void setHomeZ(int homeZ)
	{
		_homeZ = homeZ;
	}

	public boolean isWalkingToNextPoint()
	{
		return _walkingToNextPoint;
	}

	public void setWalkingToNextPoint(boolean value)
	{
		_walkingToNextPoint = value;
	}
}