import * as session from 'express-session';
import {Store} from 'express-session';
import {DefaultConfig, Redis} from '.';
import * as redisStore from "connect-redis";
import {RequestHandler} from 'express';


let sessionStore: Store|undefined = undefined;

function getRouter(options?: Partial<session.SessionOptions>): RequestHandler {
	DefaultConfig.requireEnv('SESSION_SECRET', true);
	if (Redis.client && sessionStore !== undefined) {
		const RedisStore = redisStore(session);
		sessionStore = new RedisStore({client: Redis.client});
	}
	return session({
		store: sessionStore,
		secret: DefaultConfig.SESSION_SECRET || 'keyboard cat',
		resave: false,
		saveUninitialized: true,
		cookie: {secure: false},
		...options,
	});
}

export const Session = {
	getRouter,
};