/*
 * 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.storage;


import appeng.block.AEBaseTileBlock;
import appeng.container.ContainerLocator;
import appeng.container.ContainerOpener;
import appeng.container.implementations.ContainerSkyChest;
import appeng.tile.storage.TileSkyChest;
import appeng.util.Platform;
import net.minecraft.block.BlockRenderType;
import net.minecraft.block.BlockState;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.entity.player.ServerPlayerEntity;
import net.minecraft.item.ItemStack;
import net.minecraft.util.ActionResultType;
import net.minecraft.util.Direction;
import net.minecraft.util.Hand;
import net.minecraft.util.math.AxisAlignedBB;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.BlockRayTraceResult;
import net.minecraft.util.math.shapes.ISelectionContext;
import net.minecraft.util.math.shapes.VoxelShape;
import net.minecraft.util.math.shapes.VoxelShapes;
import net.minecraft.world.IBlockReader;
import net.minecraft.world.World;

import javax.annotation.Nullable;


public class BlockSkyChest extends AEBaseTileBlock<TileSkyChest>
{

	private static final double AABB_OFFSET_BOTTOM = 0.00;
	private static final double AABB_OFFSET_SIDES = 0.06;
	private static final double AABB_OFFSET_TOP = 0.125;

	public enum SkyChestType
	{
		STONE, BLOCK
	};

	public final SkyChestType type;

	public BlockSkyChest( final SkyChestType type, Properties props )
	{
		super( props );
		this.type = type;
	}

	@Override
	public BlockRenderType getRenderType(BlockState state) {
		return BlockRenderType.ENTITYBLOCK_ANIMATED;
	}

	@Override
	public boolean propagatesSkylightDown(BlockState state, IBlockReader reader, BlockPos pos) {
		return true;
	}

	@Override
	public ActionResultType onActivated(final World w, final BlockPos pos, final PlayerEntity player, final Hand hand, final @Nullable ItemStack heldItem, final BlockRayTraceResult hit)
	{
		if( Platform.isServer() )
		{
			TileSkyChest tile = getTileEntity(w, pos);
			if (tile == null) {
				return ActionResultType.PASS;
			}

			ContainerOpener.openContainer(ContainerSkyChest.TYPE, player, ContainerLocator.forTileEntity(tile));
		}

		return ActionResultType.SUCCESS;
	}

	@Override
	public VoxelShape getShape(BlockState state, IBlockReader worldIn, BlockPos pos, ISelectionContext context) {
		// TODO Cache this! It can't be that hard!
		AxisAlignedBB aabb = computeAABB(worldIn, pos);
		return VoxelShapes.create(aabb);
	}

	private AxisAlignedBB computeAABB(final IBlockReader w, final BlockPos pos )
	{
		final TileSkyChest sk = this.getTileEntity( w, pos );
		Direction o = Direction.UP;

		if( sk != null )
		{
			o = sk.getUp();
		}

		final double offsetX = o.getXOffset() == 0 ? AABB_OFFSET_SIDES : 0.0;
		final double offsetY = o.getYOffset() == 0 ? AABB_OFFSET_SIDES : 0.0;
		final double offsetZ = o.getZOffset() == 0 ? AABB_OFFSET_SIDES : 0.0;

		// for x/z top and bottom is swapped
		final double minX = Math.max( 0.0, offsetX + ( o.getXOffset() < 0 ? AABB_OFFSET_BOTTOM : ( o.getXOffset() * AABB_OFFSET_TOP ) ) );
		final double minY = Math.max( 0.0, offsetY + ( o.getYOffset() < 0 ? AABB_OFFSET_TOP : ( o.getYOffset() * AABB_OFFSET_BOTTOM ) ) );
		final double minZ = Math.max( 0.0, offsetZ + ( o.getZOffset() < 0 ? AABB_OFFSET_BOTTOM : ( o.getZOffset() * AABB_OFFSET_TOP ) ) );

		final double maxX = Math.min( 1.0, 1.0 - offsetX - ( o.getXOffset() < 0 ? AABB_OFFSET_TOP : ( o.getXOffset() * AABB_OFFSET_BOTTOM ) ) );
		final double maxY = Math.min( 1.0, 1.0 - offsetY - ( o.getYOffset() < 0 ? AABB_OFFSET_BOTTOM : ( o.getYOffset() * AABB_OFFSET_TOP ) ) );
		final double maxZ = Math.min( 1.0, 1.0 - offsetZ - ( o.getZOffset() < 0 ? AABB_OFFSET_TOP : ( o.getZOffset() * AABB_OFFSET_BOTTOM ) ) );

		return new AxisAlignedBB( minX, minY, minZ, maxX, maxY, maxZ );
	}
}