package gtPlusPlus.core.client.renderer;

import net.minecraft.block.Block;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemStack;
import net.minecraft.util.IIcon;
import net.minecraftforge.client.IItemRenderer;

import org.lwjgl.opengl.GL11;

/**
 * Easy way of rendering an item which should look like a block. Borrowed.
 *
 * @author King Lemming
 *
 */
public class CustomItemBlockRenderer implements IItemRenderer {

    public static CustomItemBlockRenderer instance = new CustomItemBlockRenderer();

    @Override
    public boolean handleRenderType(ItemStack item, ItemRenderType type) {
        return true;
    }

    @Override
    public boolean shouldUseRenderHelper(ItemRenderType type, ItemStack item, ItemRendererHelper helper) {
        return true;
    }

    @Override
    public void renderItem(ItemRenderType type, ItemStack item, Object... data) {

        double offset = -0.5;
        if (type == ItemRenderType.EQUIPPED || type == ItemRenderType.EQUIPPED_FIRST_PERSON) {
            offset = 0;
        } else if (type == ItemRenderType.ENTITY) {
            GL11.glScalef(0.5F, 0.5F, 0.5F);
        }
        renderItemAsBlock((RenderBlocks) data[0], item, offset, offset, offset);
    }

    public static void renderItemAsBlock(RenderBlocks renderer, ItemStack item, double translateX, double translateY,
        double translateZ) {

        renderTextureAsBlock(renderer, item.getIconIndex(), translateX, translateY, translateZ);
    }

    public static void renderTextureAsBlock(RenderBlocks renderer, IIcon texture, double translateX, double translateY,
        double translateZ) {

        Tessellator tessellator = Tessellator.instance;
        Block block = Blocks.stone;

        if (texture == null) {
            return;
        }
        renderer.setRenderBoundsFromBlock(block);
        GL11.glTranslated(translateX, translateY, translateZ);
        tessellator.startDrawingQuads();

        tessellator.setNormal(0.0F, -1.0F, 0.0F);
        renderer.renderFaceYNeg(block, 0.0D, 0.0D, 0.0D, texture);

        tessellator.setNormal(0.0F, 1.0F, 0.0F);
        renderer.renderFaceYPos(block, 0.0D, 0.0D, 0.0D, texture);

        tessellator.setNormal(0.0F, 0.0F, -1.0F);
        renderer.renderFaceZNeg(block, 0.0D, 0.0D, 0.0D, texture);

        tessellator.setNormal(0.0F, 0.0F, 1.0F);
        renderer.renderFaceZPos(block, 0.0D, 0.0D, 0.0D, texture);

        tessellator.setNormal(-1.0F, 0.0F, 0.0F);
        renderer.renderFaceXNeg(block, 0.0D, 0.0D, 0.0D, texture);

        tessellator.setNormal(1.0F, 0.0F, 0.0F);
        renderer.renderFaceXPos(block, 0.0D, 0.0D, 0.0D, texture);

        tessellator.draw();
    }
}