import { isMachineComputeSelectable } from "../../session-admission-model";

// Compute-selectability for an enrolled machine in the session "Run on" pickers.
//
// The backend create-time attach gate checks LIVENESS only — compute-only
// sessions (terminal/files/git/exec) are fully supported. A machine is selectable
// iff the control plane can REACH it: `online` or `display_unavailable` (headless
// — no desktop stream, but compute works). `consent_required` is also selectable
// — a machine whose SCREEN CONTROL isn't consented is still fully usable for
// compute and read-only viewing; only INPUT is withheld (so it must never be
// un-selectable on that basis). Only `offline` / `reconnecting` / `enrolling`
// genuinely can't attach. (Since the machines deriver no longer folds consent
// into the state, `consent_required` is a defensive inclusion.)
export { isMachineComputeSelectable };

export function resolveSelectableMachineSandboxId(
  machines: readonly { sandboxId: string; state: string }[],
  preferredSandboxId: string | null,
): string | null {
  if (
    preferredSandboxId !== null &&
    machines.some(
      (machine) =>
        machine.sandboxId === preferredSandboxId && isMachineComputeSelectable(machine.state),
    )
  ) {
    return preferredSandboxId;
  }
  return machines.find((machine) => isMachineComputeSelectable(machine.state))?.sandboxId ?? null;
}