import { ConfigStore } from '../../../config/store.ts'

export type CachedSession = {
	token: string
	/** ISO timestamp when the token expires (2 days from issue). */
	expiresAt: string
	/** Email of the user who authorized (if available). */
	email?: string
}

/** Persist the auth token to the `session` section of the unified config. */
export function writeSession(session: CachedSession) {
	new ConfigStore().write({ session })
}

/**
 * Read the cached session, returning it only if the token is still
 * valid (not yet expired). Returns undefined on any error.
 */
export function readSession(): CachedSession | undefined {
	const s = new ConfigStore().read()?.session
	if(!s?.token || !s.expiresAt) {
		return undefined
	}

	if(new Date(s.expiresAt) <= new Date()) {
		return undefined // expired
	}

	return s
}