const fs = require('fs').promises;
const path = require('path');
const { logger, logRequestInfo, ErrorLogger, authLogger } = require('../config/logs');

const authMiddleware = async (req, res, next) => {

    try {
        if (req.isAuthenticated()) {

            const data = await fs.readFile(path.join(__dirname, '../data', 'user.json'), 'utf8');
            const users = JSON.parse(data);

            const sessionUser = req.user;
            

            if (!sessionUser) {
                authLogger.info('Session user is undefined');
                return res.redirect('/auth/login');
            }

            if (!sessionUser.id && !sessionUser.name) {
                authLogger.info('Session user lacks both id and name');
                return res.redirect('/auth/login');
            }

            const user = users.find(user => user.id === sessionUser.id || user.name === sessionUser.name);

            if (!user) {
                authLogger.info('User not found in user.json');
                return res.redirect('/auth/login');
            }

            req.session.user = user; 
            res.locals.user = user;
            req.userData = user;

            return next();
        } else {
            authLogger.info(`Authentication failed for IP: ${req.ip}, User Agent: ${req.headers['user-agent']}. Redirecting to login.`);
            res.redirect('/auth/login');
        }
    } catch (error) {
        authLogger.error('Error in authentication middleware:', error);
        return next(error);
    }
};

module.exports = authMiddleware;