package mods.betterfoliage.client.render.impl;

import mods.betterfoliage.BetterFoliage;
import mods.betterfoliage.client.ShadersModIntegration;
import mods.betterfoliage.client.render.IRenderBlockDecorator;
import mods.betterfoliage.client.render.IconSet;
import mods.betterfoliage.client.render.RenderBlockAOBase;
import mods.betterfoliage.common.util.Double3;
import net.minecraft.block.Block;
import net.minecraft.block.BlockGrass;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.init.Blocks;
import net.minecraft.util.IIcon;
import net.minecraft.world.IBlockAccess;
import net.minecraftforge.client.event.TextureStitchEvent;
import net.minecraftforge.common.util.ForgeDirection;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class RenderBlockBetterGrass extends RenderBlockAOBase implements IRenderBlockDecorator {

	public IconSet grassIcons = new IconSet("bettergrassandleaves", "better_grass_long_%d");
	public IconSet myceliumIcons = new IconSet("bettergrassandleaves", "better_mycel_%d");
	
	
	public boolean isBlockAccepted(IBlockAccess blockAccess, int x, int y, int z, Block block, int original) {
		if (!BetterFoliage.config.grassEnabled) return false;
		if (!((block instanceof BlockGrass || block == Blocks.mycelium))) return false;
		if (y == 255 || !blockAccess.isAirBlock(x, y + 1, z)) return false;
		return true;
	}
	
	public boolean renderWorldBlock(IBlockAccess world, int x, int y, int z, Block block, int modelId, RenderBlocks renderer) {
		// store world for later use
		blockAccess = world;
		
		// render grass block
		setPassCounters(1);
		setRenderBoundsFromBlock(block);
		renderStandardBlock(block, x, y, z);
		
		int variation = getSemiRandomFromPos(x, y, z, 0);
		int heightVariation = getSemiRandomFromPos(x, y, z, 1);
		
		IIcon renderIcon = (block == Blocks.mycelium) ? myceliumIcons.get(variation) : grassIcons.get(variation);
		if (renderIcon == null) return true;
		
		double scale = BetterFoliage.config.grassSize.value * 0.5;
		double halfHeight = 0.5 * (BetterFoliage.config.grassHeightMin.value + pRand[heightVariation] * (BetterFoliage.config.grassHeightMax.value - BetterFoliage.config.grassHeightMin.value));
		
		// render short grass
		ShadersModIntegration.startGrassQuads();
		Tessellator.instance.setBrightness(getBrightness(block, x, y + 1, z));
		renderCrossedSideQuads(new Double3(x + 0.5, y + 1.0 - 0.125 * halfHeight, z + 0.5), ForgeDirection.UP, scale, halfHeight, pRot[variation], BetterFoliage.config.grassHOffset.value, renderIcon, 0, false);
		
		return true;
	}

	@SubscribeEvent
	public void handleTextureReload(TextureStitchEvent.Pre event) {
		if (event.map.getTextureType() != 0) return;
		
		grassIcons.registerIcons(event.map);
		myceliumIcons.registerIcons(event.map);
		BetterFoliage.log.info(String.format("Found %d short grass textures", grassIcons.numLoaded));
		BetterFoliage.log.info(String.format("Found %d mycelium textures", myceliumIcons.numLoaded));
	}

}