package catalystsurvival.items;

import catalystsurvival.entity.Entity;
import catalystsurvival.entity.EntityInventory;
import catalystsurvival.inventory.Inventory;
import catalystsurvival.util.gl.GlHelpers;
import catalystsurvival.util.gl.texture.TextureReference;
import catalystsurvival.util.math.ItemStack;
import catalystsurvival.util.math.vec.Vec2d;
import catalystsurvival.world.chunk.Chunk;
import catalystsurvival.world.layer.Layer;

public class Item
{
	public TextureReference texture;
	public String id;
	
	public Item(String id) {
		this.id = id;
	}
	
	public void render(Vec2d pos, Vec2d size)
	{
		GlHelpers.begin();
		
		texture.texCoord(0, 1);	GlHelpers.vertex2(pos.x+size.x	, pos.y			);
		texture.texCoord(0, 0);	GlHelpers.vertex2(pos.x+size.x	, pos.y+size.y	);
		texture.texCoord(1, 0);	GlHelpers.vertex2(pos.x			, pos.y+size.y	);
		texture.texCoord(1, 1);	GlHelpers.vertex2(pos.x			, pos.y			);
		
		GlHelpers.end();
	}
	
	public void onAction(ItemStack stack, Layer layer, Chunk chunk, Entity entity) {
		stack.count -= 1;
	}
	
	public String getName(short meta) {
		return "";
	}
	
	public void onPickedUp(ItemStack stack, Layer layer, Chunk chunk, Entity entity)
	{
		// Update the stacks count
		if(stack.isEmpty()) return;
		
		// Does the entity have an inventory
		if(entity instanceof EntityInventory)
		{
			// Get the entities inventory
			Inventory entity_i = ((EntityInventory) entity).getInventory();
			
			// Loop over the inventory
			for(int i=0;i<entity_i.getSlotCount();i++)
			{
				// Is this item the same as the picked up item
				ItemStack i_stack = entity_i.getItem(i);
				if(stack.stackEquals(i_stack))
				{
					// Move the stack count to the inventory slot
					i_stack.count += stack.count;
					stack.count = 0;
					return;
				}
			}
			
			// Loop over the inventory
			for(int i=0;i<entity_i.getSlotCount();i++)
			{
				// Is this item stack empty
				ItemStack i_stack = entity_i.getItem(i);
				if(i_stack.isEmpty())
				{
					// Send the entity stack to the inventory stack
					entity_i.setItem(stack.copy(), i);
					stack.count = 0;
					return;
				}
			}
		}
	}
}