/*
 * 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.recipes;

import java.util.LinkedList;
import java.util.List;

import appeng.api.exceptions.MissingIngredientError;
import appeng.api.exceptions.RegistrationError;
import appeng.api.recipes.IIngredient;
import appeng.api.recipes.ResolverResultSet;
import com.google.common.base.Preconditions;
import net.minecraft.item.ItemStack;
import net.minecraftforge.oredict.OreDictionary;

public class IngredientSet implements IIngredient {
    private final int qty;
    private final String name;
    private final List<ItemStack> items;
    private final boolean isInside = false;
    private ItemStack[] baked;

    public IngredientSet(final ResolverResultSet rr, final int qty) {
        Preconditions.checkNotNull(rr);
        Preconditions.checkNotNull(rr.name);
        Preconditions.checkNotNull(rr.results);
        Preconditions.checkState(qty > 0);

        this.name = rr.name;
        this.items = rr.results;
        this.qty = qty;
    }

    @Override
    public ItemStack getItemStack() throws RegistrationError, MissingIngredientError {
        throw new RegistrationError(
            "Cannot pass group of items to a recipe which desires a single recipe item."
        );
    }

    @Override
    public ItemStack[] getItemStackSet()
        throws RegistrationError, MissingIngredientError {
        if (this.baked != null) {
            return this.baked;
        }

        if (this.isInside) {
            return new ItemStack[0];
        }

        final List<ItemStack> out = new LinkedList<ItemStack>();
        out.addAll(this.items);

        if (out.isEmpty()) {
            throw new MissingIngredientError(
                this.toString() + " - group could not be resolved to any items."
            );
        }

        for (final ItemStack is : out) {
            is.stackSize = this.qty;
        }

        return out.toArray(new ItemStack[out.size()]);
    }

    @Override
    public boolean isAir() {
        return false;
    }

    @Override
    public String getNameSpace() {
        return "";
    }

    @Override
    public String getItemName() {
        return this.name;
    }

    @Override
    public int getDamageValue() {
        return OreDictionary.WILDCARD_VALUE;
    }

    @Override
    public int getQty() {
        return this.qty;
    }

    @Override
    public void bake() throws RegistrationError, MissingIngredientError {
        this.baked = null;
        this.baked = this.getItemStackSet();
    }
}