TestingWebApp/backend/src/app.js

import express from 'express';
import cors from 'cors';
import cookieParser from 'cookie-parser';
import dotenv from 'dotenv';
import authRoutes from './routes/auth.js';
import testsRoutes from './routes/tests.js';
import { RU } from './messages/ru.js';

dotenv.config();

export function createApp() {
  const app = express();
  const corsOrigins =
    process.env.NODE_ENV === 'production'
      ? process.env.FRONTEND_URL
        ? [process.env.FRONTEND_URL]
        : []
      : [
          'http://localhost:3107',
          'http://localhost:3000',
        ];
  app.use(
    cors({
      origin: corsOrigins.length ? corsOrigins : true,
      credentials: true,
    })
  );
  app.use(express.json());
  app.use(cookieParser());
  app.use('/api/auth', authRoutes);
  app.use('/api/tests', testsRoutes);
  app.get('/api/health', (req, res) => {
    res.json({
      status: 'ok',
      timestamp: new Date().toISOString(),
      message: 'Server is running',
    });
  });
  app.use((err, req, res, _next) => {
    console.error('Error:', err);
    res.status(err.status || 500).json({
      error: err.message || RU.internal,
    });
  });
  app.use((req, res) => {
    res.status(404).json({ error: RU.notFound });
  });
  return app;
}