server.js

const express = require('express');
const cors = require('cors');
const axios = require('axios');
const path = require('path');

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

// API Configuration - kept secure on server
const API_KEY = process.env.API_KEY;
const BASE_URL = 'https://api.openweathermap.org/data/2.5/weather';

// Middleware
app.use(cors());
app.use(express.json());

// Weather API endpoint - MUST be defined before static middleware
app.get('/api/weather', async (req, res) => {
    const { city } = req.query;

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

    try {
        const response = await axios.get(BASE_URL, {
            params: {
                q: city,
                appid: API_KEY,
                units: 'metric'
            }
        });

        const data = response.data;

        // Transform data for frontend
        const weatherData = {
            city: data.name,
            temp: data.main.temp,
            condition: data.weather[0].description,
            icon: data.weather[0].icon,
            humidity: data.main.humidity,
            wind: data.wind.speed
        };

        res.json(weatherData);

    } catch (error) {
        if (error.response) {
            // Handle OpenWeatherMap API errors
            if (error.response.status === 404) {
                return res.status(404).json({ error: 'City not found. Please check the city name.' });
            }
            if (error.response.status === 401) {
                return res.status(500).json({ error: 'Invalid API key' });
            }
        }
        console.error('Weather API Error:', error.message);
        res.status(500).json({ error: 'Failed to fetch weather data. Please try again.' });
    }
});

// Serve static files (html, css, js, video)
app.use(express.static(path.join(__dirname)));

// Fallback: serve index.html for root route
app.get('/', (req, res) => {
    res.sendFile(path.join(__dirname, 'index.html'));
});

// Start server
app.listen(PORT, () => {
    console.log(`Server running at http://localhost:${PORT}`);
    console.log('Open in browser: http://localhost:' + PORT);
});