package com.volmit.iris.util;

public class Spiraler
{
	int x, z, dx, dz, sizeX, sizeZ, t, maxI, i;
	int ox, oz;
	private Spiraled spiraled;

	public Spiraler(int sizeX, int sizeZ, Spiraled spiraled)
	{
		ox = 0;
		oz = 0;
		this.spiraled = spiraled;
		retarget(sizeX, sizeZ);
	}

	public void drain()
	{
		while(hasNext())
		{
			next();
		}
	}

	static void Spiral(int X, int Y)
	{

	}

	public Spiraler setOffset(int ox, int oz)
	{
		this.ox = ox;
		this.oz = oz;
		return this;
	}

	public void retarget(int sizeX, int sizeZ)
	{
		this.sizeX = sizeX;
		this.sizeZ = sizeZ;
		x = z = dx = 0;
		dz = -1;
		i = 0;
		t = Math.max(sizeX, sizeZ);
		maxI = t * t;
	}

	public boolean hasNext()
	{
		return i < maxI;
	}

	public void next()
	{
		if((-sizeX / 2 <= x) && (x <= sizeX / 2) && (-sizeZ / 2 <= z) && (z <= sizeZ / 2))
		{
			spiraled.on(x + ox, z + ox);
		}

		if((x == z) || ((x < 0) && (x == -z)) || ((x > 0) && (x == 1 - z)))
		{
			t = dx;
			dx = -dz;
			dz = t;
		}
		x += dx;
		z += dz;
		i++;
	}
}