import DI, {DDNames} from "@gongt/ts-stl-library/DI";
import * as expressSession from "express-session";

const connectMemcached = require("connect-memcached");

export function initMemcachedSession(memcacheHosts: string[], prependKey?: string) {
	const MemcachedStore = connectMemcached(expressSession);
	
	const cookieSignedKey = DI.get(DDNames.cookieSignKey);
	
	DI.set(DDNames.sessionHandler, expressSession({
		secret: cookieSignedKey,
		resave: false,
		saveUninitialized: false,
		store: new MemcachedStore({
			hosts: memcacheHosts,
			prefix: prependKey,
			ttl: 24 * 3600, // time period in seconds
			reconnect: 5000, // in ms
			retries: 3,
		}),
	}));
}