import type { EditorCore } from "@/core";

type ElementRef = { trackId: string; elementId: string };

export class SelectionManager {
	private selectedElements: ElementRef[] = [];
	private listeners = new Set<() => void>();

	constructor(editor: EditorCore) {
		void editor;
	}

	getSelectedElements(): ElementRef[] {
		return this.selectedElements;
	}

	setSelectedElements({ elements }: { elements: ElementRef[] }): void {
		this.selectedElements = elements;
		this.notify();
	}

	clearSelection(): void {
		this.selectedElements = [];
		this.notify();
	}

	subscribe(listener: () => void): () => void {
		this.listeners.add(listener);
		return () => this.listeners.delete(listener);
	}

	private notify(): void {
		this.listeners.forEach((fn) => fn());
	}
}