/*
 * 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.parts.automation;


import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import net.minecraft.entity.Entity;
import net.minecraft.entity.item.ItemEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.item.*;
import net.minecraft.nbt.CompoundNBT;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.ActionResultType;
import net.minecraft.util.Direction;
import net.minecraft.util.Hand;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.BlockRayTraceResult;
import net.minecraft.util.math.Vec3d;
import net.minecraft.world.World;
import net.minecraft.world.server.ServerWorld;
import net.minecraftforge.common.IPlantable;
import net.minecraftforge.items.IItemHandler;

import appeng.api.config.AccessRestriction;
import appeng.api.config.Actionable;
import appeng.api.config.FuzzyMode;
import appeng.api.config.IncludeExclude;
import appeng.api.config.Settings;
import appeng.api.config.Upgrades;
import appeng.api.config.YesNo;
import appeng.api.networking.events.MENetworkCellArrayUpdate;
import appeng.api.networking.events.MENetworkChannelsChanged;
import appeng.api.networking.events.MENetworkEventSubscribe;
import appeng.api.networking.events.MENetworkPowerStatusChange;
import appeng.api.networking.security.IActionSource;
import appeng.api.parts.IPartItem;
import appeng.api.parts.IPartModel;
import appeng.api.storage.IMEInventoryHandler;
import appeng.api.storage.IStorageChannel;
import appeng.api.storage.channels.IItemStorageChannel;
import appeng.api.storage.data.IAEItemStack;
import appeng.api.storage.data.IItemList;
import appeng.api.util.AEPartLocation;
import appeng.core.AEConfig;
import appeng.core.Api;

import appeng.items.parts.PartModels;
import appeng.me.GridAccessException;
import appeng.me.storage.MEInventoryHandler;
import appeng.tile.inventory.AppEngInternalAEInventory;
import appeng.util.Platform;
import appeng.util.inv.InvOperation;
import appeng.util.prioritylist.FuzzyPriorityList;
import appeng.util.prioritylist.PrecisePriorityList;

import javax.annotation.Nullable;


public class PartFormationPlane extends PartAbstractFormationPlane<IAEItemStack>
{

	private static final PlaneModels MODELS = new PlaneModels( "part/formation_plane_", "part/formation_plane_on_" );

	@PartModels
	public static List<IPartModel> getModels()
	{
		return MODELS.getModels();
	}

	private final MEInventoryHandler<IAEItemStack> myHandler = new MEInventoryHandler<>( this, Api.INSTANCE
			.storage()
			.getStorageChannel( IItemStorageChannel.class ) );
	private final AppEngInternalAEInventory Config = new AppEngInternalAEInventory( this, 63 );

	public PartFormationPlane( final ItemStack is )
	{
		super( is );

		this.getConfigManager().registerSetting( Settings.FUZZY_MODE, FuzzyMode.IGNORE_ALL );
		this.getConfigManager().registerSetting( Settings.PLACE_BLOCK, YesNo.YES );
		this.updateHandler();
	}

	@Override
	protected void updateHandler()
	{
		this.myHandler.setBaseAccess( AccessRestriction.WRITE );
		this.myHandler.setWhitelist( this.getInstalledUpgrades( Upgrades.INVERTER ) > 0 ? IncludeExclude.BLACKLIST : IncludeExclude.WHITELIST );
		this.myHandler.setPriority( this.getPriority() );

		final IItemList<IAEItemStack> priorityList = Api.INSTANCE.storage().getStorageChannel( IItemStorageChannel.class ).createList();

		final int slotsToUse = 18 + this.getInstalledUpgrades( Upgrades.CAPACITY ) * 9;
		for( int x = 0; x < this.Config.getSlots() && x < slotsToUse; x++ )
		{
			final IAEItemStack is = this.Config.getAEStackInSlot( x );
			if( is != null )
			{
				priorityList.add( is );
			}
		}

		if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
		{
			this.myHandler.setPartitionList(
					new FuzzyPriorityList<IAEItemStack>( priorityList, (FuzzyMode) this.getConfigManager().getSetting( Settings.FUZZY_MODE ) ) );
		}
		else
		{
			this.myHandler.setPartitionList( new PrecisePriorityList<IAEItemStack>( priorityList ) );
		}

		try
		{
			this.getProxy().getGrid().postEvent( new MENetworkCellArrayUpdate() );
		}
		catch( final GridAccessException e )
		{
			// :P
		}
	}

	@Override
	public void onChangeInventory( final IItemHandler inv, final int slot, final InvOperation mc, final ItemStack removedStack, final ItemStack newStack )
	{
		super.onChangeInventory( inv, slot, mc, removedStack, newStack );

		if( inv == this.Config )
		{
			this.updateHandler();
		}
	}

	@Override
	public void readFromNBT( final CompoundNBT data )
	{
		super.readFromNBT( data );
		this.Config.readFromNBT( data, "config" );
		this.updateHandler();
	}

	@Override
	public void writeToNBT( final CompoundNBT data )
	{
		super.writeToNBT( data );
		this.Config.writeToNBT( data, "config" );
	}

	@Override
	public IItemHandler getInventoryByName( final String name )
	{
		if( name.equals( "config" ) )
		{
			return this.Config;
		}

		return super.getInventoryByName( name );
	}

	@Override
	@MENetworkEventSubscribe
	public void powerRender( final MENetworkPowerStatusChange c )
	{
		this.stateChanged();
	}

	@MENetworkEventSubscribe
	public void updateChannels( final MENetworkChannelsChanged changedChannels )
	{
		this.stateChanged();
	}

	@Override
	public boolean onPartActivate( final PlayerEntity player, final Hand hand, final Vec3d pos )
	{
		if( Platform.isServer() )
		{
			// FIXME Platform.openGUI( player, this.getHost().getTile(), this.getSide(), GuiBridge.GUI_FORMATION_PLANE );
		}
		return true;
	}

	@Override
	public List<IMEInventoryHandler> getCellArray( final IStorageChannel channel )
	{
		if( this.getProxy().isActive() && channel == Api.INSTANCE.storage().getStorageChannel( IItemStorageChannel.class ) )
		{
			final List<IMEInventoryHandler> handler = new ArrayList<>( 1 );
			handler.add( this.myHandler );
			return handler;
		}
		return Collections.emptyList();
	}

	@Override
	public IAEItemStack injectItems( final IAEItemStack input, final Actionable type, final IActionSource src )
	{
		if( this.blocked || input == null || input.getStackSize() <= 0 )
		{
			return input;
		}

		final YesNo placeBlock = (YesNo) this.getConfigManager().getSetting( Settings.PLACE_BLOCK );

		final ItemStack is = input.createItemStack();
		final Item i = is.getItem();

		long maxStorage = Math.min( input.getStackSize(), is.getMaxStackSize() );
		boolean worked = false;

		final TileEntity te = this.getHost().getTile();
		final World w = te.getWorld();
		final AEPartLocation side = this.getSide();

		final BlockPos placePos = te.getPos().offset( side.getFacing() );

		if( w.getBlockState( placePos ).getMaterial().isReplaceable() )
		{
			if( placeBlock == YesNo.YES && ( i instanceof BlockItem || i instanceof IPlantable || i instanceof FireworkStarItem || i instanceof FireworkRocketItem || i instanceof IPartItem ) )
			{
				final PlayerEntity player = Platform.getPlayer( (ServerWorld) w );
				Platform.configurePlayer( player, side, this.getTile() );
				Hand hand = player.getActiveHand();
				player.setHeldItem( hand, is );

				maxStorage = is.getCount();
				worked = true;
				if( type == Actionable.MODULATE )
				{
					// The side the plane is attached to will be considered the look direction
					// in terms of placing an item
					Direction lookDirection = side.getFacing();

					// FIXME No idea what any of this is _supposed_ to do, comment badly needed
					if ( i instanceof IPlantable || i instanceof WallOrFloorItem )
					{
						boolean Worked = false;

						// Up or Down, Attempt 1??
						if( side.xOffset == 0 && side.zOffset == 0 )
						{
							Worked = i.onItemUse( new DirectionalPlaceContext(w, placePos.offset( side.getFacing() ), lookDirection, is, side.getFacing()) ) == ActionResultType.SUCCESS;
						}

						// Up or Down, Attempt 2??
						if( !Worked && side.xOffset == 0 && side.zOffset == 0 )
						{
							Worked = i.onItemUse( new DirectionalPlaceContext(w, placePos.offset( side.getFacing().getOpposite() ), lookDirection, is, side.getFacing().getOpposite()) )
								== ActionResultType.SUCCESS;
						}

						// Horizontal, attempt 1??
						if( !Worked && side.yOffset == 0 )
						{
							Worked = i.onItemUse( new DirectionalPlaceContext(w, placePos.offset( Direction.DOWN ), lookDirection, is, Direction.DOWN) ) == ActionResultType.SUCCESS;
						}

						if( !Worked )
						{
							i.onItemUse( new DirectionalPlaceContext(w, placePos, lookDirection, is, lookDirection.getOpposite()) );
						}

						maxStorage -= is.getCount();
					}
					else
					{
						i.onItemUse( new DirectionalPlaceContext(w, placePos, lookDirection, is, lookDirection.getOpposite()) );
						maxStorage -= is.getCount();
					}
				}
				else
				{
					maxStorage = 1;
				}

				// Safe keeping
				player.setHeldItem( hand, ItemStack.EMPTY );
			}
			else
			{
				worked = true;

				final int sum = this.countEntitesAround( w, placePos );

				if( sum < AEConfig.instance().getFormationPlaneEntityLimit() )
				{
					if( type == Actionable.MODULATE )
					{
						is.setCount( (int) maxStorage );
						final double x = ( side.xOffset != 0 ? 0 : .7 * ( Platform.getRandomFloat() - .5 ) ) + side.xOffset + .5 + te.getPos().getX();
						final double y = ( side.yOffset != 0 ? 0 : .7 * ( Platform.getRandomFloat() - .5 ) ) + side.yOffset + .5 + te.getPos().getY();
						final double z = ( side.zOffset != 0 ? 0 : .7 * ( Platform.getRandomFloat() - .5 ) ) + side.zOffset + .5 + te.getPos().getZ();

						final ItemEntity ei = new ItemEntity( w, x, y, z, is.copy() );

						Entity result = ei;

						ei.setMotion( side.xOffset * 0.2, side.yOffset * 0.2, side.zOffset * 0.2 );

						if( is.getItem().hasCustomEntity( is ) )
						{
							result = is.getItem().createEntity( w, ei, is );
							if( result != null )
							{
								ei.remove();
							}
							else
							{
								result = ei;
							}
						}

						if( !w.addEntity( result ) )
						{
							result.remove();
							worked = false;
						}
					}
				}
				else
				{
					worked = false;
				}
			}
		}

		this.blocked = !w.getBlockState( placePos ).getMaterial().isReplaceable();

		if( worked )
		{
			final IAEItemStack out = input.copy();
			out.decStackSize( maxStorage );
			if( out.getStackSize() == 0 )
			{
				return null;
			}
			return out;
		}

		return input;
	}

	@Override
	public IStorageChannel<IAEItemStack> getChannel()
	{
		return Api.INSTANCE.storage().getStorageChannel( IItemStorageChannel.class );
	}

	@Override
	public IPartModel getStaticModels()
	{
		return MODELS.getModel( this.getConnections(), this.isPowered(), this.isActive() );
	}

	@Override
	public ItemStack getItemStackRepresentation()
	{
		return Api.INSTANCE.definitions().parts().formationPlane().maybeStack( 1 ).orElse( ItemStack.EMPTY );
	}

// FIXME	@Override
// FIXME	public GuiBridge getGuiBridge()
// FIXME	{
// FIXME		return GuiBridge.GUI_FORMATION_PLANE;
// FIXME	}

	private int countEntitesAround( World world, BlockPos pos )
	{
		final AxisAlignedBB t = new AxisAlignedBB( pos ).grow( 8 );
		final List<Entity> list = world.getEntitiesWithinAABB( Entity.class, t );

		return list.size();
	}

	private class ForcedItemUseContext extends ItemUseContext {
		protected ForcedItemUseContext(World worldIn, @Nullable PlayerEntity player, Hand handIn, ItemStack heldItem, BlockRayTraceResult rayTraceResultIn) {
			super(worldIn, player, handIn, heldItem, rayTraceResultIn);
		}
	}

}