import type { TimelineManageable, TimelineToken, TimelineUpdate } from "atom.io"

import type { Store } from "../store/store.ts"
import { withdraw } from "../store/withdraw.ts"

export function subscribeToTimeline<ManagedAtom extends TimelineManageable>(
	store: Store,
	token: TimelineToken<ManagedAtom>,
	key: string,
	handleUpdate: (update: TimelineUpdate<ManagedAtom>) => void,
): () => void {
	const tl = withdraw(store, token)
	store.logger.info(`👀`, `timeline`, token.key, `Adding subscription "${key}"`)
	const unsubscribe = tl.subject.subscribe(key, handleUpdate)
	return () => {
		store.logger.info(
			`🙈`,
			`timeline`,
			token.key,
			`Removing subscription "${key}" from timeline`,
		)
		unsubscribe()
	}
}