/**
 * Example: Simple XMPP Client
 * Demonstrates basic XMPP client functionality
 */

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

// Configuration
const config = {
  service: 'xmpp://localhost:5222',
  domain: 'localhost',
  username: 'user1',
  password: 'password'
};

// Create client
const client = new Client(config);

// Setup readline for input
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  prompt: '> '
});

// Connection established
client.on('online', async (address) => {
  console.log(`Connected as ${address.toString()}`);
  
  // Send presence
  await client.send(xml('presence'));
  
  console.log('\nCommands:');
  console.log('  /send <jid> <message> - Send a message');
  console.log('  /presence [status]    - Set presence');
  console.log('  /quit                 - Disconnect');
  console.log('');
  
  rl.prompt();
});

// Handle incoming stanzas
client.on('stanza', (stanza) => {
  if (stanza.is('message')) {
    const from = stanza.attrs.from;
    const body = stanza.getChildText('body');
    
    if (body) {
      console.log(`\n[${from}]: ${body}`);
      rl.prompt();
    }
  } else if (stanza.is('presence')) {
    const from = stanza.attrs.from;
    const type = stanza.attrs.type;
    const show = stanza.getChildText('show');
    const status = stanza.getChildText('status');
    
    if (type === 'unavailable') {
      console.log(`\n${from} is now offline`);
    } else {
      const state = show || 'available';
      const statusText = status ? ` (${status})` : '';
      console.log(`\n${from} is now ${state}${statusText}`);
    }
    rl.prompt();
  }
});

// Handle user input
rl.on('line', async (line) => {
  const parts = line.trim().split(' ');
  const command = parts[0];
  
  try {
    if (command === '/send' && parts.length >= 3) {
      const to = parts[1];
      const message = parts.slice(2).join(' ');
      
      await client.send(
        xml('message', { type: 'chat', to },
          xml('body', {}, message)
        )
      );
      
      console.log(`Sent to ${to}: ${message}`);
      
    } else if (command === '/presence') {
      const status = parts.slice(1).join(' ');
      
      const presence = xml('presence');
      if (status) {
        presence.append(xml('status', {}, status));
      }
      
      await client.send(presence);
      console.log('Presence updated');
      
    } else if (command === '/quit') {
      await client.stop();
      process.exit(0);
      
    } else if (command.startsWith('/')) {
      console.log('Unknown command');
    }
  } catch (error) {
    console.error('Error:', error.message);
  }
  
  rl.prompt();
});

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

// Start client
console.log('Connecting to XMPP server...');
client.start().catch(console.error);

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