export class Node {
	constructor(data, children = []) {
		console.assert(Array.isArray(children) && children.every((child) => child instanceof Node), children);

		this._data = data;
		this._parent = null;
		this._children = children;

		for (let child of this._children)
			child._parent = this;
	}

	// Static

	static createTree(tree) {
		console.assert(typeof tree === "object", tree);
		console.assert(!tree.children || Array.isArray(tree.children), tree);

		let {children, ...data} = tree;
		return new Node(data, (children || []).map(Node.createTree));
	}

	// Public

	get data() { return this._data; }
	get parent() { return this._parent; }
	get children() { return this._children; }

	flatten() {
		return [this, ...this._children.flatMap((child) => child.flatten())];
	}
}