package game.worldgen;

import java.util.List;

import com.google.common.collect.Lists;

import game.block.Block;
import game.init.BlockRegistry;
import game.util.ExtMath;
import game.world.State;
import game.world.WorldServer;

public class GeneratorDebug implements ChunkGenerator
{
	private static final List<State> STATES = Lists.<State>newArrayList();
	private static final int XSTRETCH;
	private static final int ZSTRETCH;
	
	static {
		for(Block block : BlockRegistry.REGISTRY) {
			STATES.addAll(block.getValidStates());
		}
		XSTRETCH = ExtMath.ceilf(ExtMath.sqrtf((float)STATES.size()));
		ZSTRETCH = ExtMath.ceilf((float)STATES.size() / (float)XSTRETCH);
	}
	
	public static State getState(int x, int z) {
		State state = null;
		if(x > 0 && z > 0 && x % 2 != 0 && z % 2 != 0) {
			x = x / 2;
			z = z / 2;
			if(x <= XSTRETCH && z <= ZSTRETCH) {
				int idx = ExtMath.absi(x * XSTRETCH + z);
				if(idx < STATES.size()) {
					state = STATES.get(idx);
				}
			}
		}
		return state;
	}
    
	public int getMaximumHeight() {
		return 72;
	}
    
    public void generateChunk(WorldServer world, int x, int z, ChunkPrimer primer)
    {
    	for(int bx = 0; bx < 16; ++bx) {
			for(int bz = 0; bz < 16; ++bz) {
				int sx = x * 16 + bx;
				int sz = z * 16 + bz;
//				primer.set(bx, 60, bz, Blocks.glass.getDefaultState());
				State state = getState(sx, sz);
				if(state != null) {
					primer.set(bx, 1, bz, state);
				}
			}
		}
    }
}