const TEAM_MACHINE_SESSION_RE = /^[A-Za-z0-9._:-]{1,160}$/

export function agentSessionIdFromCliIdentity(identity: string | null): string | null {
  if (!identity) return null
  const colon = identity.indexOf(':')
  if (colon < 0) return identity.trim() || null
  const source = identity.slice(0, colon)
  const value = identity.slice(colon + 1).trim()
  return source === 'RNX_CLI_IDENTITY' && value ? value : null
}

export function teamMachineSessionIdFromCliIdentity(
  identity: string | null,
): string | null {
  if (!identity?.startsWith('TM_SESSION:')) return null
  const sessionId = identity.slice('TM_SESSION:'.length).trim()
  if (!TEAM_MACHINE_SESSION_RE.test(sessionId)) return null
  return sessionId
}

export function isValidTeamMachineSessionId(sessionId: string): boolean {
  return TEAM_MACHINE_SESSION_RE.test(sessionId)
}