/*
 * 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 java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.function.Function;

import javax.annotation.Nullable;

import alexiil.mc.lib.attributes.fluid.volume.FluidVolume;
import com.google.common.collect.ImmutableList;

import net.minecraft.block.BlockState;
import net.minecraft.client.render.model.json.ModelOverrideList;
import net.minecraft.client.renderer.TransformationMatrix;
import net.minecraft.client.render.model.BakedQuad;
import net.minecraft.client.render.model.BakedModel;
import net.minecraft.client.render.model.Material;
import net.minecraft.client.renderer.texture.AtlasTexture;
import net.minecraft.client.texture.Sprite;
import net.minecraft.entity.LivingEntity;
import net.minecraft.fluid.Fluids;
import net.minecraft.item.ItemStack;
import net.minecraft.util.math.Direction;
import net.minecraft.util.Identifier;
import net.minecraft.world.World;
import net.minecraftforge.client.model.ItemLayerModel;
import net.minecraftforge.fluids.FluidAttributes;

import appeng.fluids.items.FluidDummyItem;

/**
 * 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 DummyFluidDispatcherBakedModel extends DelegateBakedModel {
    private final Function<Material, Sprite> bakedTextureGetter;

    public DummyFluidDispatcherBakedModel(BakedModel baseModel,
                                          Function<Material, Sprite> bakedTextureGetter) {
        super(baseModel);
        this.bakedTextureGetter = bakedTextureGetter;
    }

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

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

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

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

    @Override
    public ModelOverrideList getOverrides() {
        return new ModelOverrideList() {
            @Override
            public BakedModel getModelWithOverrides(BakedModel originalModel, ItemStack stack, World world,
                                                    LivingEntity entity) {
                if (!(stack.getItem() instanceof FluidDummyItem)) {
                    return originalModel;
                }

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

                FluidVolume fluidStack = itemFacade.getFluidStack(stack);
                if (fluidStack.isEmpty()) {
                    fluidStack = new FluidVolume(Fluids.WATER, FluidAttributes.BUCKET_VOLUME);
                }

                FluidAttributes attributes = fluidStack.getFluid().getAttributes();
                Identifier stillTexture = attributes.getStillTexture(fluidStack);
                Material stillMaterial = new Material(AtlasTexture.LOCATION_BLOCKS_TEXTURE, stillTexture);
                Sprite sprite = DummyFluidDispatcherBakedModel.this.bakedTextureGetter.apply(stillMaterial);
                if (sprite == null) {
                    return new DummyFluidBakedModel(ImmutableList.of());
                }

                return new DummyFluidBakedModel(
                        ItemLayerModel.getQuadsForSprite(0, sprite, TransformationMatrix.identity()));
            }
        };
    }
}