// QUADTREE

import {None, Some} from "./option.js";

export function Tree() {
	let parent = None();
	let children = None();
	let color = "#000000";

	const node = {
		set_parent: p => { parent = Some(p); },
		get_parent: () => parent,

		create_children: () => {
			children.none(() => {
				let _children = Array(4);
				for (let i = 0; i < 4; i++) {
					_children[i] = Tree();
					_children[i].set_color(color);
					_children[i].set_parent(node);
				}
				children = Some(_children);
			});
		},
		get_children: () => children,

		set_color: c => { color = c; },
		get_color: () => color,

		to_string: () => {
			return children
				.some(cs => {
					return Some(`{color: "${color}", children: [${
						cs.map(c => c.to_string()).join(", ")
					}]}`);
				})
				.unwrap(`{color: "${color}"}`);
		},
	};

	return node;
}