'use server';

import { SessionData } from '@/lib/session/session-data.type';
import { siteConfig } from '@/site.config';
import { getIronSession, IronSession, SessionOptions } from 'iron-session';
import { cookies } from 'next/headers';

let sessionOptions: SessionOptions | undefined;

const getSessionOptions = (): SessionOptions => {
    if (!!sessionOptions) return sessionOptions;

    const password = process.env.SESSION_SECRET;
    if (!password) {
        throw new Error('SESSION_SECRET is not set in environment variables.');
    }

    sessionOptions = {
        cookieName: siteConfig.slug,
        password: password,
        cookieOptions: {
            secure: process.env.NODE_ENV === 'production',
            sameSite: 'lax',
            maxAge: 60 * 60 * 24 * 30, // 30 days
        },
    };

    return sessionOptions;
};

export const getSession = async (): Promise<IronSession<SessionData>> => {
    return await getIronSession(await cookies(), getSessionOptions());
};

export const clearSessionData = async (): Promise<void> => {
    const session = await getSession();
    session.destroy();
    await session.save();
};

export const getSessionData = async (): Promise<SessionData | null> => {
    try {
        const session = await getSession();
        return SessionData.parse(session);
    } catch {
        await clearSessionData();
    }
    return null;
};