const { Client } = require('ssh2');

const HOST = process.env.SSH_HOST || '183.99.177.40';
const PORT = Number(process.env.SSH_PORT || 22);
const USER = process.env.SSH_USER || 'chpark';
const PASS = process.env.SSH_PASS || 'qlalfqjsgh11';

async function run(cmd, { silent = false } = {}) {
  return new Promise((resolve, reject) => {
    const conn = new Client();
    let stdout = '';
    let stderr = '';
    conn
      .on('ready', () => {
        conn.exec(cmd, (err, stream) => {
          if (err) { conn.end(); return reject(err); }
          stream.on('close', (code) => { conn.end(); resolve({ code, stdout, stderr }); })
                .on('data', (data) => { const s = data.toString(); stdout += s; if (!silent) process.stdout.write(s); })
                .stderr.on('data', (data) => { const s = data.toString(); stderr += s; if (!silent) process.stderr.write(s); });
        });
      })
      .on('error', reject)
      .connect({ host: HOST, port: PORT, username: USER, password: PASS, readyTimeout: 30000 });
  });
}

module.exports = { run };

if (require.main === module) {
  const cmd = process.argv.slice(2).join(' ');
  if (!cmd) {
    console.error('usage: node ssh-run.js <command>');
    process.exit(1);
  }
  run(cmd).then(r => process.exit(r.code)).catch(e => { console.error(e.message); process.exit(1); });
}