import net from 'node:net'

/**
 * Fragt clamd ueber den Unix-Socket. Der Socket liegt im geteilten Volume
 * clamav_socket, siehe compose.yaml. Antwort auf zPING ist "PONG".
 */
export function pingClamav(socketPath: string, timeoutMs = 2000): Promise<boolean> {
  return new Promise((resolve) => {
    let settled = false
    const done = (ok: boolean) => {
      if (settled) return
      settled = true
      socket.destroy()
      resolve(ok)
    }

    const socket = net.createConnection(socketPath)
    socket.setTimeout(timeoutMs)
    socket.on('connect', () => socket.write('zPING\0'))
    socket.on('data', (chunk) => done(chunk.toString().includes('PONG')))
    socket.on('timeout', () => done(false))
    socket.on('error', () => done(false))
  })
}