/*
 * 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.block.networking;


import net.minecraft.client.renderer.block.model.ModelResourceLocation;
import net.minecraft.item.ItemStack;
import net.minecraft.util.ResourceLocation;

import appeng.api.implementations.items.IAEItemPowerStorage;
import appeng.block.AEBaseItemBlockChargeable;
import appeng.bootstrap.BlockRenderingCustomizer;
import appeng.bootstrap.IBlockRendering;
import appeng.bootstrap.IItemRendering;
import appeng.tile.networking.TileEnergyCell;


public class BlockEnergyCellRendering extends BlockRenderingCustomizer
{

	private final ResourceLocation baseModel;

	public BlockEnergyCellRendering( ResourceLocation baseModel )
	{
		this.baseModel = baseModel;
	}

	@Override
	public void customize( IBlockRendering rendering, IItemRendering itemRendering )
	{
		itemRendering.meshDefinition( this::getItemModel );
		// Note: Since we use the block models, we dont need to register custom variants
	}

	/**
	 * Determines which version of the energy cell model should be used depending on the fill factor
	 * of the item stack.
	 */
	private ModelResourceLocation getItemModel( ItemStack is )
	{
		double fillFactor = getFillFactor( is );

		int storageLevel = TileEnergyCell.getStorageLevelFromFillFactor( fillFactor );
		return new ModelResourceLocation( baseModel, "fullness=" + storageLevel );
	}

	/**
	 * Helper method that returns the energy fill factor (between 0 and 1) of a given item stack.
	 * Returns 0 if the item stack has no fill factor.
	 */
	private static double getFillFactor( ItemStack is )
	{
		if( !( is.getItem() instanceof IAEItemPowerStorage ) )
		{
			return 0;
		}

		AEBaseItemBlockChargeable itemChargeable = (AEBaseItemBlockChargeable) is.getItem();
		double curPower = itemChargeable.getAECurrentPower( is );
		double maxPower = itemChargeable.getAEMaxPower( is );

		return curPower / maxPower;
	}
}