/*
 * This file is part of the L2J Mobius project.
 * 
 * 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 com.l2jmobius.gameserver.model.residences;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.l2jmobius.commons.database.DatabaseFactory;
import com.l2jmobius.gameserver.data.xml.impl.SkillTreesData;
import com.l2jmobius.gameserver.model.L2SkillLearn;
import com.l2jmobius.gameserver.model.actor.instance.L2PcInstance;
import com.l2jmobius.gameserver.model.events.ListenersContainer;
import com.l2jmobius.gameserver.model.holders.SkillHolder;
import com.l2jmobius.gameserver.model.interfaces.INamable;
import com.l2jmobius.gameserver.model.zone.type.L2ResidenceZone;

/**
 * @author xban1x
 */
public abstract class AbstractResidence extends ListenersContainer implements INamable
{
	private final Logger LOGGER = Logger.getLogger(getClass().getName());
	private final int _residenceId;
	private String _name;
	
	private L2ResidenceZone _zone = null;
	private final Map<Integer, ResidenceFunction> _functions = new ConcurrentHashMap<>();
	private final List<SkillHolder> _residentialSkills = new ArrayList<>();
	
	public AbstractResidence(int residenceId)
	{
		_residenceId = residenceId;
		initResidentialSkills();
	}
	
	protected abstract void load();
	
	protected abstract void initResidenceZone();
	
	public abstract int getOwnerId();
	
	protected void initResidentialSkills()
	{
		final List<L2SkillLearn> residentialSkills = SkillTreesData.getInstance().getAvailableResidentialSkills(getResidenceId());
		for (L2SkillLearn s : residentialSkills)
		{
			_residentialSkills.add(new SkillHolder(s.getSkillId(), s.getSkillLevel()));
		}
	}
	
	public final int getResidenceId()
	{
		return _residenceId;
	}
	
	@Override
	public final String getName()
	{
		return _name;
	}
	
	// TODO: Remove it later when both castles and forts are loaded from same table.
	public final void setName(String name)
	{
		_name = name;
	}
	
	public L2ResidenceZone getResidenceZone()
	{
		return _zone;
	}
	
	protected void setResidenceZone(L2ResidenceZone zone)
	{
		_zone = zone;
	}
	
	public final List<SkillHolder> getResidentialSkills()
	{
		return _residentialSkills;
	}
	
	public void giveResidentialSkills(L2PcInstance player)
	{
		if ((_residentialSkills != null) && !_residentialSkills.isEmpty())
		{
			for (SkillHolder sh : _residentialSkills)
			{
				player.addSkill(sh.getSkill(), false);
			}
		}
	}
	
	public void removeResidentialSkills(L2PcInstance player)
	{
		if ((_residentialSkills != null) && !_residentialSkills.isEmpty())
		{
			for (SkillHolder sh : _residentialSkills)
			{
				player.removeSkill(sh.getSkill(), false);
			}
		}
	}
	
	/**
	 * Initializes all available functions for the current residence
	 */
	protected void initFunctions()
	{
		try (Connection con = DatabaseFactory.getInstance().getConnection();
			PreparedStatement ps = con.prepareStatement("SELECT * FROM residence_functions WHERE residenceId = ?"))
		{
			ps.setInt(1, getResidenceId());
			try (ResultSet rs = ps.executeQuery())
			{
				while (rs.next())
				{
					final int id = rs.getInt("id");
					final int level = rs.getInt("level");
					final long expiration = rs.getLong("expiration");
					final ResidenceFunction func = new ResidenceFunction(id, level, expiration, this);
					if ((expiration <= System.currentTimeMillis()) && !func.reactivate())
					{
						removeFunction(func);
						continue;
					}
					_functions.put(id, func);
				}
			}
		}
		catch (Exception e)
		{
			LOGGER.log(Level.WARNING, "Failed to initialize functions for residence: " + getResidenceId(), e);
		}
	}
	
	public void addFunction(int id, int level)
	{
		addFunction(new ResidenceFunction(id, level, this));
	}
	
	/**
	 * Adds new function and removes old if matches same id
	 * @param func
	 */
	public void addFunction(ResidenceFunction func)
	{
		try (Connection con = DatabaseFactory.getInstance().getConnection();
			PreparedStatement ps = con.prepareStatement("INSERT INTO residence_functions (id, level, expiration, residenceId) VALUES (?, ?, ?, ?) ON DUPLICATE KEY UPDATE level = ?, expiration = ?"))
		{
			ps.setInt(1, func.getId());
			ps.setInt(2, func.getLevel());
			ps.setLong(3, func.getExpiration());
			ps.setInt(4, getResidenceId());
			
			ps.setInt(5, func.getLevel());
			ps.setLong(6, func.getExpiration());
			ps.execute();
		}
		catch (Exception e)
		{
			LOGGER.log(Level.WARNING, "Failed to add function: " + func.getId() + " for residence: " + getResidenceId(), e);
		}
		finally
		{
			if (_functions.containsKey(func.getId()))
			{
				removeFunction(_functions.get(func.getId()));
			}
			_functions.put(func.getId(), func);
		}
	}
	
	/**
	 * Removes the specified function
	 * @param func
	 */
	public void removeFunction(ResidenceFunction func)
	{
		try (Connection con = DatabaseFactory.getInstance().getConnection();
			PreparedStatement ps = con.prepareStatement("DELETE FROM residence_functions WHERE residenceId = ? and id = ?"))
		{
			ps.setInt(1, getResidenceId());
			ps.setInt(2, func.getId());
			ps.execute();
		}
		catch (Exception e)
		{
			LOGGER.log(Level.WARNING, "Failed to remove function: " + func.getId() + " residence: " + getResidenceId(), e);
		}
		finally
		{
			func.cancelExpiration();
			_functions.remove(func.getId());
		}
	}
	
	/**
	 * Removes all functions
	 */
	public void removeFunctions()
	{
		try (Connection con = DatabaseFactory.getInstance().getConnection();
			PreparedStatement ps = con.prepareStatement("DELETE FROM residence_functions WHERE residenceId = ?"))
		{
			ps.setInt(1, getResidenceId());
			ps.execute();
		}
		catch (Exception e)
		{
			LOGGER.log(Level.WARNING, "Failed to remove functions for residence: " + getResidenceId(), e);
		}
		finally
		{
			_functions.values().forEach(ResidenceFunction::cancelExpiration);
			_functions.clear();
		}
	}
	
	/**
	 * @param type
	 * @return {@code true} if function is available, {@code false} otherwise
	 */
	public boolean hasFunction(ResidenceFunctionType type)
	{
		return _functions.values().stream().map(ResidenceFunction::getTemplate).anyMatch(func -> func.getType() == type);
	}
	
	/**
	 * @param type
	 * @return the function template by type, null if not available
	 */
	public ResidenceFunction getFunction(ResidenceFunctionType type)
	{
		return _functions.values().stream().filter(func -> func.getType() == type).findFirst().orElse(null);
	}
	
	/**
	 * @param id
	 * @param level
	 * @return the function by id and level, null if not available
	 */
	public ResidenceFunction getFunction(int id, int level)
	{
		return _functions.values().stream().filter(func -> (func.getId() == id) && (func.getLevel() == level)).findFirst().orElse(null);
	}
	
	/**
	 * @param id
	 * @return the function by id, null if not available
	 */
	public ResidenceFunction getFunction(int id)
	{
		return _functions.values().stream().filter(func -> (func.getId() == id)).findFirst().orElse(null);
	}
	
	/**
	 * @param type
	 * @return level of function, 0 if not available
	 */
	public int getFunctionLevel(ResidenceFunctionType type)
	{
		final ResidenceFunction func = getFunction(type);
		return func != null ? func.getLevel() : 0;
	}
	
	/**
	 * @param type
	 * @return the expiration of function by type, -1 if not available
	 */
	public long getFunctionExpiration(ResidenceFunctionType type)
	{
		final ResidenceFunction function = _functions.values().stream().filter(func -> func.getTemplate().getType() == type).findFirst().orElse(null);
		return function != null ? function.getExpiration() : -1;
	}
	
	/**
	 * @return all avaible functions
	 */
	public Collection<ResidenceFunction> getFunctions()
	{
		return _functions.values();
	}
	
	@Override
	public boolean equals(Object obj)
	{
		return (obj instanceof AbstractResidence) && (((AbstractResidence) obj).getResidenceId() == getResidenceId());
	}
	
	@Override
	public String toString()
	{
		return getName() + " (" + getResidenceId() + ")";
	}
}