require('dotenv').config();
const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
const path = require('path');

const app = express();

// Middleware
app.use(cors());
app.use(express.json());
app.use(express.static(path.join(__dirname, '../client/dist')));

// Database connection
mongoose.connect(process.env.MONGODB_URI, {
  useNewUrlParser: true,
  useUnifiedTopology: true
})
.then(() => console.log('Connected to MongoDB'))
.catch(err => console.error('MongoDB connection error:', err));

// Routes
const { router: authRoutes, auth } = require('./routes/auth');
const courseRoutes = require('./routes/courses');
const userRoutes = require('./routes/users');

app.use('/api/auth', authRoutes);
app.use('/api/courses', courseRoutes);
app.use('/api/users', userRoutes);

// Serve client
app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, '../client/dist/index.html'));
});

const PORT = process.env.PORT || 5000;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});