package com.hbm.blocks.network;

import com.hbm.blocks.BlockDummyable;
import com.hbm.entity.item.EntityMovingItem;
import com.hbm.lib.RefStrings;
import com.hbm.tileentity.network.TileEntityCraneSplitter;

import api.hbm.conveyor.IConveyorBelt;
import api.hbm.conveyor.IConveyorItem;
import api.hbm.conveyor.IConveyorPackage;
import api.hbm.conveyor.IEnterableBlock;
import cpw.mods.fml.client.registry.RenderingRegistry;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.block.material.Material;
import net.minecraft.client.renderer.texture.IIconRegister;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.IIcon;
import net.minecraft.util.MathHelper;
import net.minecraft.util.Vec3;
import net.minecraft.world.World;
import net.minecraftforge.common.util.ForgeDirection;

public class CraneSplitter extends BlockDummyable implements IConveyorBelt, IEnterableBlock {

	@SideOnly(Side.CLIENT) public IIcon iconTopLeft;
	@SideOnly(Side.CLIENT) public IIcon iconTopRight;
	@SideOnly(Side.CLIENT) public IIcon iconFrontLeft;
	@SideOnly(Side.CLIENT) public IIcon iconFrontRight;
	@SideOnly(Side.CLIENT) public IIcon iconBackLeft;
	@SideOnly(Side.CLIENT) public IIcon iconBackRight;
	@SideOnly(Side.CLIENT) public IIcon iconLeft;
	@SideOnly(Side.CLIENT) public IIcon iconRight;
	@SideOnly(Side.CLIENT) public IIcon iconBelt;
	@SideOnly(Side.CLIENT) public IIcon iconInner;
	@SideOnly(Side.CLIENT) public IIcon iconInnerSide;
	
	public CraneSplitter() {
		super(Material.iron);
	}

	@Override
	public TileEntity createNewTileEntity(World world, int meta) {
		return new TileEntityCraneSplitter();
	}

	@Override
	public int[] getDimensions() {
		return new int[] {0, 0, 0, 0, 0, 1};
	}

	@Override
	public int getOffset() {
		return 0;
	}
	
	@Override
	@SideOnly(Side.CLIENT)
	public void registerBlockIcons(IIconRegister iconRegister) {
		super.registerBlockIcons(iconRegister);
		this.iconTopLeft = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_top_left");
		this.iconTopRight = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_top_right");
		this.iconFrontLeft = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_front_left");
		this.iconFrontRight = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_front_right");
		this.iconBackLeft = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_back_left");
		this.iconBackRight = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_back_right");
		this.iconLeft = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_left");
		this.iconRight = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_right");
		this.iconBelt = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_belt");
		this.iconInner = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_inner");
		this.iconInnerSide = iconRegister.registerIcon(RefStrings.MODID + ":crane_splitter_inner_side");
	}

	public static int renderID = RenderingRegistry.getNextAvailableRenderId();

	@Override
	public int getRenderType() {
		return renderID;
	}

	@Override public boolean canItemEnter(World world, int x, int y, int z, ForgeDirection dir, IConveyorItem entity) { return getTravelDirection(world, x, y, z, null) == dir; }
	@Override public boolean canPackageEnter(World world, int x, int y, int z, ForgeDirection dir, IConveyorPackage entity) { return false; }
	@Override public void onPackageEnter(World world, int x, int y, int z, ForgeDirection dir, IConveyorPackage entity) { }

	@Override
	public void onItemEnter(World world, int x, int y, int z, ForgeDirection dir, IConveyorItem entity) {
		int[] core = this.findCore(world, x, y, z);
		if(core == null) return;
		x = core[0];
		y = core[1];
		z = core[2];
		TileEntity tile = world.getTileEntity(x, y, z);
		if(!(tile instanceof TileEntityCraneSplitter)) return;
		TileEntityCraneSplitter splitter = (TileEntityCraneSplitter) tile;
		boolean pos = splitter.getPosition();
		ItemStack stack = entity.getItemStack();
		ForgeDirection rot = ForgeDirection.getOrientation(splitter.getBlockMetadata() - offset).getRotation(ForgeDirection.DOWN);
		
		if(stack.stackSize % 2 == 0) {
			stack.stackSize /= 2;
			spawnMovingItem(world, x, y, z, stack.copy());
			spawnMovingItem(world, x + rot.offsetX, y, z + rot.offsetZ, stack.copy());
		} else {
			int baseSize = stack.stackSize /= 2;
			stack.stackSize = baseSize + (pos ? 0 : 1);
			spawnMovingItem(world, x, y, z, stack.copy());
			stack.stackSize = baseSize + (pos ? 1 : 0);
			spawnMovingItem(world, x + rot.offsetX, y, z + rot.offsetZ, stack.copy());
			splitter.setPosition(!pos);
		}
	}
	
	private void spawnMovingItem(World world, int x, int y, int z, ItemStack stack) {
		if(stack.stackSize <= 0) return;
		EntityMovingItem moving = new EntityMovingItem(world);
		Vec3 pos = Vec3.createVectorHelper(x + 0.5, y + 0.5, z + 0.5);
		Vec3 snap = this.getClosestSnappingPosition(world, x, y, z, pos);
		moving.setPosition(snap.xCoord, snap.yCoord, snap.zCoord);
		moving.setItemStack(stack);
		world.spawnEntityInWorld(moving);
	}

	@Override
	public boolean canItemStay(World world, int x, int y, int z, Vec3 itemPos) {
		return true;
	}

	@Override
	public Vec3 getTravelLocation(World world, int x, int y, int z, Vec3 itemPos, double speed) {
		ForgeDirection dir = this.getTravelDirection(world, x, y, z, itemPos);
		Vec3 snap = this.getClosestSnappingPosition(world, x, y, z, itemPos);
		Vec3 dest = Vec3.createVectorHelper(snap.xCoord - dir.offsetX * speed, snap.yCoord - dir.offsetY * speed, snap.zCoord - dir.offsetZ * speed);
		Vec3 motion = Vec3.createVectorHelper((dest.xCoord - itemPos.xCoord), (dest.yCoord - itemPos.yCoord), (dest.zCoord - itemPos.zCoord));
		double len = motion.lengthVector();
		Vec3 ret = Vec3.createVectorHelper(itemPos.xCoord + motion.xCoord / len * speed, itemPos.yCoord + motion.yCoord / len * speed, itemPos.zCoord + motion.zCoord / len * speed);
		return ret;
	}

	@Override
	public Vec3 getClosestSnappingPosition(World world, int x, int y, int z, Vec3 itemPos) {
		ForgeDirection dir = this.getTravelDirection(world, x, y, z, itemPos);
		itemPos.xCoord = MathHelper.clamp_double(itemPos.xCoord, x, x + 1);
		itemPos.zCoord = MathHelper.clamp_double(itemPos.zCoord, z, z + 1);
		double posX = x + 0.5;
		double posZ = z + 0.5;
		if(dir.offsetX != 0) posX = itemPos.xCoord;
		if(dir.offsetZ != 0) posZ = itemPos.zCoord;
		return Vec3.createVectorHelper(posX, y + 0.25, posZ);
	}
	
	public ForgeDirection getTravelDirection(World world, int x, int y, int z, Vec3 itemPos) {
		int meta = world.getBlockMetadata(x, y, z);
		if(meta >= 12) return ForgeDirection.getOrientation(meta - offset);
		return ForgeDirection.getOrientation(meta).getRotation(ForgeDirection.UP);
	}
}