package projectzombie.display.lighting;

import projectzombie.util.math.MathHelpers;
import projectzombie.util.math.map.IMap2D;
import projectzombie.util.math.map.Map2D;
import projectzombie.util.math.vec.Vec2d;
import projectzombie.util.math.vec.Vec2i;
import projectzombie.world.chunk.Chunk;

public class ChunkLightingCollection implements IMap2D<ChunkLightingTemp>
{
	private Map2D<ChunkLightingTemp> chunks = new Map2D<ChunkLightingTemp>(this);
	
	public final int RENDER_DISTANCE = Chunk.RENDER_DISTANCE;

	@Override
	public ChunkLightingTemp getEmpty(Vec2i pos) {
		return new ChunkLightingTemp();
	}
	
	private Vec2i getChunkPosFromPos(Vec2i pos) {
		return this.getChunkPosFromPos(new Vec2d(pos.x, pos.y));
	}
	
	private Vec2i getChunkPosFromPos(Vec2d pos) {
		return new Vec2i(
				MathHelpers.floor(pos.x / (double)Chunk.CHUNK_SIZE.mx),
				MathHelpers.floor(pos.y / (double)Chunk.CHUNK_SIZE.my));
	}
	
	public ChunkLightingTemp getChunkwCPos(Vec2i cpos) {
		if(!chunks.contains(cpos)) {
			ChunkLightingTemp chunk = new ChunkLightingTemp();
			chunks.set(cpos, chunk);
			return chunk;
		} else {
			return chunks.get(cpos);
		}
	}
	
	public ChunkLightingTemp getChunk(Vec2i pos) {
		return getChunkwCPos(getChunkPosFromPos(pos));
	}
	
	public ChunkLightingTemp getChunk(Vec2d pos) {
		return getChunkwCPos(getChunkPosFromPos(pos));
	}
}