/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2017, 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.crafttweaker;


import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;

import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.item.ItemStack;
import net.minecraft.util.NonNullList;
import net.minecraftforge.oredict.OreDictionary;

import crafttweaker.CraftTweakerAPI;
import crafttweaker.IAction;
import crafttweaker.api.item.IIngredient;
import crafttweaker.api.item.IItemStack;

import appeng.integration.abstraction.ICraftTweaker;
import appeng.util.Platform;


public class CTModule implements ICraftTweaker
{
	static final List<IAction> MODIFICATIONS = new ArrayList<>();

	@Override
	public void preInit()
	{
		CraftTweakerAPI.registerClass( GrinderRecipes.class );
		CraftTweakerAPI.registerClass( InscriberRecipes.class );
		CraftTweakerAPI.registerClass( SpatialRegistry.class );
		CraftTweakerAPI.registerClass( AttunementRegistry.class );
		CraftTweakerAPI.registerClass( CannonRegistry.class );
	}

	@Override
	public void postInit()
	{
		MODIFICATIONS.forEach( CraftTweakerAPI::apply );
	}

	public static ItemStack toStack( IItemStack iStack )
	{
		if( iStack == null )
		{
			return ItemStack.EMPTY;
		}
		else
		{
			return (ItemStack) iStack.getInternal();
		}
	}

	public static List<ItemStack> toStackExpand( IItemStack iStack )
	{
		if( iStack == null )
		{
			return Collections.emptyList();
		}
		else
		{
			ItemStack is = (ItemStack) iStack.getInternal();
			if( !is.isItemStackDamageable() && is.getItemDamage() == OreDictionary.WILDCARD_VALUE )
			{
				NonNullList<ItemStack> ret = NonNullList.create();
				is.getItem().getSubItems( CreativeTabs.SEARCH, ret );
				return ret.stream().map( i -> new ItemStack( i.getItem(), iStack.getAmount(), i.getItemDamage() ) ).collect( Collectors.toList() );
			}
			else
			{
				return Collections.singletonList( is );
			}
		}
	}

	public static Optional<Collection<ItemStack>> toStacks( IIngredient ingredient )
	{
		if( ingredient == null )
		{
			return Optional.empty();
		}
		Set<ItemStack> ret = new TreeSet<>( CTModule::compareItemStacks );
		ingredient.getItems().stream().map( CTModule::toStackExpand ).forEach( ret::addAll );
		if( ret.isEmpty() )
		{
			return Optional.empty();
		}
		return Optional.of( ret );
	}

	private static int compareItemStacks( ItemStack a, ItemStack b )
	{
		if( Platform.itemComparisons().isSameItem( a, b ) )
		{
			return 0;
		}
		if( a == null )
		{
			return -1;
		}
		if( b == null )
		{
			return 1;
		}
		return System.identityHashCode( a ) - System.identityHashCode( b );
	}
}