package gregtech.common.render;

import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.item.ItemStack;
import net.minecraft.util.IIcon;
import net.minecraftforge.client.IItemRenderer;
import net.minecraftforge.client.MinecraftForgeClient;
import net.minecraftforge.fluids.Fluid;
import net.minecraftforge.fluids.FluidStack;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import gregtech.api.enums.ItemList;
import gregtech.common.items.ItemVolumetricFlask;

@SideOnly(Side.CLIENT)
public final class FlaskRenderer implements IItemRenderer {

    public FlaskRenderer() {
        MinecraftForgeClient.registerItemRenderer(ItemList.VOLUMETRIC_FLASK.getItem(), this);
    }

    @Override
    public boolean handleRenderType(ItemStack item, ItemRenderType type) {
        return type != ItemRenderType.FIRST_PERSON_MAP;
    }

    @Override
    public boolean shouldUseRenderHelper(ItemRenderType type, ItemStack item, ItemRendererHelper helper) {
        return type == ItemRenderType.ENTITY && helper == ItemRendererHelper.ENTITY_BOBBING
            || (helper == ItemRendererHelper.ENTITY_ROTATION && Minecraft.getMinecraft().gameSettings.fancyGraphics);
    }

    @Override
    public void renderItem(ItemRenderType type, ItemStack item, Object... data) {
        ItemVolumetricFlask cell = (ItemVolumetricFlask) item.getItem();
        IIcon icon = item.getIconIndex();
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glEnable(GL11.GL_ALPHA_TEST);
        GTRenderUtil.applyStandardItemTransform(type);

        FluidStack fs = cell != null ? cell.getFluid(item) : null;
        if (fs != null) {
            IIcon iconWindow = cell.iconWindow;
            Fluid fluid = fs.getFluid();
            IIcon fluidIcon = fluid.getIcon(fs);
            int fluidColor = fluid.getColor(fs);

            Minecraft.getMinecraft().renderEngine.bindTexture(TextureMap.locationItemsTexture);
            GL11.glBlendFunc(GL11.GL_ZERO, GL11.GL_ONE);
            GTRenderUtil.renderItem(type, iconWindow);

            Minecraft.getMinecraft().renderEngine.bindTexture(TextureMap.locationBlocksTexture);
            GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
            GL11.glDepthFunc(GL11.GL_EQUAL);
            GL11.glColor3ub((byte) (fluidColor >> 16), (byte) (fluidColor >> 8), (byte) fluidColor);
            GTRenderUtil.renderItem(type, fluidIcon);
            GL11.glColor3ub((byte) -1, (byte) -1, (byte) -1);
            GL11.glDepthFunc(GL11.GL_LEQUAL);
        }

        Minecraft.getMinecraft().renderEngine.bindTexture(TextureMap.locationItemsTexture);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GTRenderUtil.renderItem(type, icon);
        GL11.glDisable(GL11.GL_ALPHA_TEST);
        GL11.glDisable(GL11.GL_BLEND);
    }
}