package resonantinduction.old.client.render;

import java.util.HashMap;
import java.util.Map;

import net.minecraft.block.Block;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.GLAllocation;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.util.Icon;
import net.minecraft.util.ResourceLocation;
import net.minecraft.world.World;
import net.minecraftforge.fluids.Fluid;
import net.minecraftforge.fluids.FluidStack;

import org.lwjgl.opengl.GL11;

public class RenderFluidHelper
{

	private static final ResourceLocation BLOCK_TEXTURE = TextureMap.locationBlocksTexture;

	private static Map<Fluid, int[]> flowingRenderCache = new HashMap<Fluid, int[]>();
	private static Map<Fluid, int[]> stillRenderCache = new HashMap<Fluid, int[]>();

	public static final int DISPLAY_STAGES = 100;

	private static final BlockRenderInfo liquidBlock = new BlockRenderInfo();

	public static ResourceLocation getFluidSheet(FluidStack liquid)
	{
		return BLOCK_TEXTURE;
	}

	public static Icon getFluidTexture(Fluid fluid, boolean flowing)
	{
		if (fluid == null)
		{
			return null;
		}
		Icon icon = flowing ? fluid.getFlowingIcon() : fluid.getStillIcon();
		if (icon == null)
		{
			icon = ((TextureMap) Minecraft.getMinecraft().getTextureManager().getTexture(TextureMap.locationBlocksTexture)).getAtlasSprite("missingno");
		}
		return icon;
	}

	public static void setColorForFluidStack(FluidStack fluidstack)
	{
		if (fluidstack == null)
		{
			return;
		}

		int color = fluidstack.getFluid().getColor(fluidstack);
		float red = (color >> 16 & 255) / 255.0F;
		float green = (color >> 8 & 255) / 255.0F;
		float blue = (color & 255) / 255.0F;
		GL11.glColor4f(red, green, blue, 1);
	}

	public static int[] getFluidDisplayLists(FluidStack fluidStack, World world, boolean flowing)
	{
		if (fluidStack == null)
		{
			return null;
		}
		Fluid fluid = fluidStack.getFluid();
		if (fluid == null)
		{
			return null;
		}
		Map<Fluid, int[]> cache = flowing ? flowingRenderCache : stillRenderCache;
		int[] diplayLists = cache.get(fluid);
		if (diplayLists != null)
		{
			return diplayLists;
		}

		diplayLists = new int[DISPLAY_STAGES];

		if (fluid.getBlockID() > 0)
		{
			liquidBlock.baseBlock = Block.blocksList[fluid.getBlockID()];
			liquidBlock.texture = getFluidTexture(fluidStack.getFluid(), flowing);
		}
		else
		{
			liquidBlock.baseBlock = Block.waterStill;
			liquidBlock.texture = getFluidTexture(fluidStack.getFluid(), flowing);
		}

		cache.put(fluid, diplayLists);

		GL11.glDisable(GL11.GL_LIGHTING);
		GL11.glDisable(GL11.GL_BLEND);
		GL11.glDisable(GL11.GL_CULL_FACE);

		for (int s = 0; s < DISPLAY_STAGES; ++s)
		{
			diplayLists[s] = GLAllocation.generateDisplayLists(1);
			GL11.glNewList(diplayLists[s], 4864 /* GL_COMPILE */);

			liquidBlock.min.x = 0.01f;
			liquidBlock.min.y = 0;
			liquidBlock.min.z = 0.01f;

			liquidBlock.max.x = 0.99f;
			liquidBlock.max.y = (float) s / (float) DISPLAY_STAGES;
			liquidBlock.max.z = 0.99f;

			RenderBlockEntity.INSTANCE.renderBlock(liquidBlock, world, 0, 0, 0, false, true);

			GL11.glEndList();
		}

		GL11.glColor4f(1, 1, 1, 1);
		GL11.glEnable(GL11.GL_CULL_FACE);
		GL11.glEnable(GL11.GL_BLEND);
		GL11.glEnable(GL11.GL_LIGHTING);

		return diplayLists;
	}
}