import {
	readAccounts, readSessions, readSubscriptions,
	writeAccounts, writeSessions, writeSubscriptions,
 } from "~/server/database";
import { cancelAccountStreams } from "~/server/streams";

export default defineEventHandler(async (event) => {
	const serverSession = await requireServerSession(event);

	let accounts = await readAccounts();
	const sessionAccount = accounts.find(
		account => account.id === serverSession.accountId
	);
	if (!sessionAccount) {
		throw Error("Account does not exist");
	}

	// Remove sessions for this account
	const removedSessionIds = new Set<number>();
	let sessions = await readSessions();
	sessions = sessions.filter(session => {
		if (session.accountId === serverSession.accountId) {
			removedSessionIds.add(session.id);
			return false;
		}
		return true;
	});
	cancelAccountStreams(serverSession.accountId);
	await writeSessions(sessions);
	await deleteCookie(event, "session");

	// Remove subscriptions for this account
	let subscriptions = await readSubscriptions();
	subscriptions = subscriptions.filter(
		subscription => !removedSessionIds.has(subscription.sessionId)
	);
	await writeSubscriptions(subscriptions);

	// Remove the account
	accounts = accounts.filter(account => account.id !== serverSession.accountId);
	await writeAccounts(accounts);

	// Update Schedule counts.
	await updateScheduleInterestedCounts(accounts);
})