// Mirror of `maestro-protocol` JSON shapes. Keep in sync with
// crates/maestro-protocol/src/lib.rs.

export type Uuid = string;
export type IsoTimestamp = string;

export type SessionStatus = "Running" | "Dead";

export interface Session {
  id: Uuid;
  daemon_id: string;
  cwd: string;
  command: string;
  env: Record<string, string>;
  metadata: Record<string, unknown>;
  status: SessionStatus;
  created_at: IsoTimestamp;
}

export interface DaemonInfo {
  daemon_id: string;
  hostname: string;
  version: string;
  daemon_url: string;
}

export interface WorktreeSpec {
  base_repo: string;
  branch: string;
  cleanup_on_kill?: boolean;
}

export interface CreateSessionRequest {
  daemon_id: string;
  cwd: string;
  command: string;
  env?: Record<string, string>;
  metadata?: Record<string, unknown>;
  worktree?: WorktreeSpec;
}

export type RegistryEvent =
  | {
      type: "Snapshot";
      daemons: DaemonInfo[];
      sessions: Session[];
    }
  | { type: "DaemonAdded"; daemon: DaemonInfo }
  | { type: "DaemonRemoved"; daemon_id: string }
  | { type: "SessionAdded"; session: Session }
  | { type: "SessionRemoved"; daemon_id: string; id: Uuid }
  | { type: "SessionUpdated"; session: Session }
  | { type: "Lagged"; skipped: number };

export type ClientControl =
  | { type: "Resize"; cols: number; rows: number }
  | { type: "Ping" }
  | { type: "Pong" }
  | { type: "Error"; code: string; message: string };

export interface ApiError {
  error: { code: string; message: string };
}

export function sessionName(s: Session): string {
  const meta = s.metadata as Record<string, unknown>;
  const name = meta?.name;
  if (typeof name === "string" && name.length > 0) return name;
  return s.command;
}

export function sessionLabel(s: Session): string | undefined {
  const meta = s.metadata as Record<string, unknown>;
  const label = meta?.label;
  return typeof label === "string" ? label : undefined;
}