/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
 *
 * Applied Energistics 2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Applied Energistics 2 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
 */

package appeng.integration.modules.waila.part;


import java.util.List;

import com.google.common.collect.Iterators;

import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;

import mcp.mobius.waila.api.IWailaConfigHandler;
import mcp.mobius.waila.api.IWailaDataAccessor;

import appeng.api.parts.IPart;
import appeng.core.localization.WailaText;
import appeng.me.GridAccessException;
import appeng.parts.p2p.PartP2PTunnel;


/**
 * Provides information about a P2P tunnel to WAILA.
 */
public final class P2PStateWailaDataProvider extends BasePartWailaDataProvider
{

	private static final int STATE_UNLINKED = 0;
	private static final int STATE_OUTPUT = 1;
	private static final int STATE_INPUT = 2;
	public static final String TAG_P2P_STATE = "p2p_state";

	/**
	 * Adds state to the tooltip
	 *
	 * @param part part with state
	 * @param currentToolTip to be added to tooltip
	 * @param accessor wrapper for various information
	 * @param config config settings
	 *
	 * @return modified tooltip
	 */
	@Override
	public List<String> getWailaBody( final IPart part, final List<String> currentToolTip, final IWailaDataAccessor accessor, final IWailaConfigHandler config )
	{
		if( part instanceof PartP2PTunnel )
		{
			NBTTagCompound nbtData = accessor.getNBTData();
			if( nbtData.hasKey( TAG_P2P_STATE ) )
			{
				int[] stateArr = nbtData.getIntArray( TAG_P2P_STATE );
				if( stateArr.length == 2 )
				{
					int state = stateArr[0];
					int outputs = stateArr[1];

					switch( state )
					{
						case STATE_UNLINKED:
							currentToolTip.add( WailaText.P2PUnlinked.getLocal() );
							break;
						case STATE_OUTPUT:
							currentToolTip.add( WailaText.P2POutput.getLocal() );
							break;
						case STATE_INPUT:
							currentToolTip.add( getOutputText( outputs ) );
							break;
					}
				}
			}
		}

		return currentToolTip;
	}

	@Override
	public NBTTagCompound getNBTData( EntityPlayerMP player, IPart part, TileEntity te, NBTTagCompound tag, World world, BlockPos pos )
	{
		if( part instanceof PartP2PTunnel )
		{
			PartP2PTunnel tunnel = (PartP2PTunnel) part;

			// The default state
			int state = STATE_UNLINKED;
			int outputCount = 0;

			if( !tunnel.isOutput() )
			{
				outputCount = getOutputCount( tunnel );
				if( outputCount > 0 )
				{
					// Only set it to INPUT if we know there are any outputs
					state = STATE_INPUT;
				}
			}
			else
			{
				PartP2PTunnel input = tunnel.getInput();
				if( input != null )
				{
					state = STATE_OUTPUT;
				}
			}

			tag.setIntArray( TAG_P2P_STATE, new int[] {
					state,
					outputCount
			} );
		}

		return tag;
	}

	private static int getOutputCount( PartP2PTunnel tunnel )
	{
		try
		{
			return Iterators.size( tunnel.getOutputs().iterator() );
		}
		catch( GridAccessException e )
		{
			// Well... unknown size it is!
			return 0;
		}
	}

	private static String getOutputText( int outputs )
	{
		if( outputs <= 1 )
		{
			return WailaText.P2PInputOneOutput.getLocal();
		}
		else
		{
			return String.format( WailaText.P2PInputManyOutputs.getLocal(), outputs );
		}
	}

}