// server.js - HTTPS server with English logs
import { createServer } from 'https';
import { parse } from 'url';
import next from 'next';
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';

// ES Module 中取得 __dirname
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

// Determine environment based on npm script
const scriptName = process.env.npm_lifecycle_event;
let dev;

if (scriptName === 'dev:https') {
    dev = true;
    console.log('Development mode');
} else if (scriptName === 'start:https') {
    dev = false;
    console.log('Production mode');
} else {
    // Default to production mode
    dev = false;
    console.log('Unknown script, using production mode');
}

const hostname = '0.0.0.0';
const port = 3000;

const app = next({ dev, hostname, port });
const handle = app.getRequestHandler();

// SSL certificate file paths
const sslFiles = {
    ca: path.join(__dirname, 'ssl/root.ca-bundle'),
    cert: path.join(__dirname, 'ssl/server.crt'),
    key: path.join(__dirname, 'ssl/server.key')
};

// Check and load SSL certificates
function loadSSLCertificates() {
    try {
        // Check if all certificate files exist
        for (const [type, filePath] of Object.entries(sslFiles)) {
            if (!fs.existsSync(filePath)) {
                throw new Error(`SSL ${type} file not found: ${filePath}`);
            }
        }

        console.log('All SSL certificate files found');

        return {
            ca: fs.readFileSync(sslFiles.ca),
            cert: fs.readFileSync(sslFiles.cert),
            key: fs.readFileSync(sslFiles.key)
        };
    } catch (error) {
        console.error('Failed to load SSL certificates:', error.message);
        console.error('Please ensure the following files exist:');
        console.error('  - ssl/*.ca-bundle');
        console.error('  - ssl/*.crt');
        console.error('  - ssl/*.key');
        process.exit(1);
    }
}

// Start the application
app.prepare().then(() => {
    const httpsOptions = loadSSLCertificates();

    createServer(httpsOptions, (req, res) => {
        const parsedUrl = parse(req.url, true);
        handle(req, res, parsedUrl);
    }).listen(port, hostname, (err) => {
        if (err) {
            console.error('Failed to start HTTPS server:', err);
            process.exit(1);
        }
        console.log(`HTTPS Server ready on https://${hostname}:${port}`);

        if (dev) {
            console.log('Development mode started with hot reload support');
        } else {
            console.log('Production mode started with optimized performance');
        }
    });

}).catch((ex) => {
    console.error('Failed to start Next.js application:', ex.stack);
    process.exit(1);
});

// Graceful shutdown
process.on('SIGTERM', () => {
    console.log('Shutting down server...');
    process.exit(0);
});

process.on('SIGINT', () => {
    console.log('Shutting down server...');
    process.exit(0);
});