/*
 * 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.client.render;


import appeng.client.render.cablebus.FacadeBuilder;
import appeng.items.parts.ItemFacade;
import it.unimi.dsi.fastutil.ints.Int2ObjectArrayMap;
import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
import net.minecraft.block.state.IBlockState;
import net.minecraft.client.renderer.block.model.BakedQuad;
import net.minecraft.client.renderer.block.model.IBakedModel;
import net.minecraft.client.renderer.block.model.ItemOverrideList;
import net.minecraft.client.renderer.vertex.VertexFormat;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.item.ItemStack;
import net.minecraft.util.EnumFacing;
import net.minecraft.world.World;

import javax.annotation.Nullable;
import java.util.Collections;
import java.util.List;
import java.util.Objects;


/**
 * This baked model class is used as a dispatcher to redirect the renderer to the *real* model that should be used based
 * on the item stack.
 * A custom Item Override List is used to accomplish this.
 */
public class FacadeDispatcherBakedModel extends DelegateBakedModel {
    private final VertexFormat format;
    private final FacadeBuilder facadeBuilder;
    private final Int2ObjectMap<FacadeBakedItemModel> cache = new Int2ObjectArrayMap<>();

    public FacadeDispatcherBakedModel(IBakedModel baseModel, VertexFormat format, FacadeBuilder facadeBuilder) {
        super(baseModel);
        this.format = format;
        this.facadeBuilder = facadeBuilder;
    }

    // This is never used. See the item override list below.
    @Override
    public List<BakedQuad> getQuads(@Nullable IBlockState state, @Nullable EnumFacing side, long rand) {
        return Collections.emptyList();
    }

    @Override
    public boolean isGui3d() {
        return this.getBaseModel().isGui3d();
    }

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

    @Override
    public ItemOverrideList getOverrides() {
        return new ItemOverrideList(Collections.emptyList()) {
            @Override
            public IBakedModel handleItemState(IBakedModel originalModel, ItemStack stack, World world, EntityLivingBase entity) {
                if (!(stack.getItem() instanceof ItemFacade)) {
                    return originalModel;
                }

                ItemFacade itemFacade = (ItemFacade) stack.getItem();

                ItemStack textureItem = itemFacade.getTextureItem(stack);

                int hash = Objects.hash(textureItem.getItem().getRegistryName(), textureItem.getMetadata(), textureItem.getTagCompound());
                FacadeBakedItemModel model = FacadeDispatcherBakedModel.this.cache.get(hash);
                if (model == null) {
                    model = new FacadeBakedItemModel(FacadeDispatcherBakedModel.this.getBaseModel(), textureItem, FacadeDispatcherBakedModel.this.facadeBuilder);
                    FacadeDispatcherBakedModel.this.cache.put(hash, model);
                }

                return model;
            }
        };
    }
}