server.js

const express = require('express');
const path = require('path');
const app = express();
const PORT = process.env.PORT || 3000;

// Serve static files from the current directory
app.use(express.static(path.join(__dirname)));

// Route for the main page
app.get('/', (req, res) => {
  res.sendFile(path.join(__dirname, 'index.html'));
});

// API endpoint for weather data (proxy to OpenWeather API)
app.get('/api/weather', async (req, res) => {
  const city = req.query.q;
  const apiKey = process.env.OPENWEATHER_API_KEY;

  if (!apiKey) {
    return res.status(500).json({
      error: 'API key not configured. Please set OPENWEATHER_API_KEY environment variable.'
    });
  }

  if (!city) {
    return res.status(400).json({ error: 'City parameter is required' });
  }

  try {
    const response = await fetch(
      `https://api.openweathermap.org/data/2.5/weather?q=${city}&appid=${apiKey}&units=metric`
    );

    if (!response.ok) {
      throw new Error(`Weather API responded with status: ${response.status}`);
    }

    const data = await response.json();
    res.json(data);
  } catch (error) {
    console.error('Error fetching weather data:', error);
    res.status(500).json({ error: 'Failed to fetch weather data' });
  }
});

// Health check endpoint
app.get('/health', (req, res) => {
  res.json({
    status: 'OK',
    timestamp: new Date().toISOString(),
    uptime: process.uptime()
  });
});

// Error handling middleware
app.use((err, req, res, next) => {
  console.error(err.stack);
  res.status(500).json({ error: 'Something went wrong!' });
});

// 404 handler
app.use((req, res) => {
  res.status(404).json({ error: 'Route not found' });
});

app.listen(PORT, () => {
  console.log(`Weather App server running on http://localhost:${PORT}`);
  console.log(`Health check available at http://localhost:${PORT}/health`);
});