/**
 * Simple example: Echo Bot
 * A bot that echoes back any message sent to it
 */

const { Client } = require('@xmpp/client');
const { xml } = require('@xmpp/client');

// Bot configuration
const BOT_JID = 'echobot@localhost';
const BOT_PASSWORD = 'password';
const SERVER = 'localhost';
const PORT = 5222;

// Create XMPP client
const client = new Client({
  service: `xmpp://${SERVER}:${PORT}`,
  domain: 'localhost',
  username: 'echobot',
  password: BOT_PASSWORD
});

// Handle connection
client.on('online', async (address) => {
  console.log(`Echo Bot online as ${address.toString()}`);
  
  // Send initial presence
  await client.send(xml('presence'));
  
  console.log('Echo Bot ready to receive messages!');
});

// Handle incoming stanzas
client.on('stanza', async (stanza) => {
  // Only process message stanzas
  if (stanza.is('message')) {
    const from = stanza.attrs.from;
    const body = stanza.getChildText('body');
    const type = stanza.attrs.type || 'chat';
    
    // Ignore messages without body or from ourselves
    if (!body || from === BOT_JID) return;
    
    console.log(`Message from ${from}: ${body}`);
    
    // Create echo response
    const response = xml(
      'message',
      { type, to: from },
      xml('body', {}, `Echo: ${body}`)
    );
    
    // Send response
    await client.send(response);
    console.log(`Sent echo to ${from}`);
  }
});

// Handle errors
client.on('error', (err) => {
  console.error('Error:', err);
});

// Handle offline
client.on('offline', () => {
  console.log('Echo Bot offline');
});

// Start the client
client.start().catch(console.error);

// Handle process termination
process.on('SIGINT', async () => {
  console.log('\nShutting down Echo Bot...');
  await client.stop();
  process.exit(0);
});

console.log('Starting Echo Bot...');
console.log(`Connecting to ${SERVER}:${PORT} as ${BOT_JID}`);