import { iter_2d, range } from "./utils/range.mjs";

export const BOX_SIZE = 9;
export const CENTER = Math.floor(BOX_SIZE / 2);



function create_world (size) {
	return {
		tiles: Array(BOX_SIZE).fill(0).map(_ => Array(BOX_SIZE).fill(0)),
	};
}
const world = create_world(BOX_SIZE);

export function set_tile (world, x, y, tile) {
	if (out_of_bounds(x, y)) return;
	world.tiles[x][y] = tile;
}

export function get_tile (world, x, y) {
	if (out_of_bounds(x, y)) return { type: "out_of_bounds" };
	return world.tiles[x][y];
}

export function create_box (parent) {
	return {
		...create_world(BOX_SIZE),
		parent,
	};
}

export function get_root () {
	return world;
}

export function out_of_bounds (x, y) {
	return x < 0 || x >= BOX_SIZE ||
		y < 0 || y >= BOX_SIZE
}

export function replace_root (new_world) {
	// maybe unnecessary to go over each tile instead of just each column.
	iter_2d(range(0, BOX_SIZE - 1), (x, y) => {
		set_tile(world, x, y, get_tile(new_world, x, y));
	});
}