/**
 * `service_group_update_starting` SSE event.
 *
 * Server → client broadcast that a service-group update is about to
 * begin. Carries the `targetVersion` being upgraded to and the
 * `expectedDowntimeSeconds` estimate so clients can surface a
 * countdown / maintenance affordance before the daemon restarts.
 *
 * Canonical wire-contract source. Daemon code imports the type
 * directly from this file; external consumers import via
 * `@vellumai/assistant-api`.
 */

import { z } from "zod";

export const ServiceGroupUpdateStartingEventSchema = z.object({
  type: z.literal("service_group_update_starting"),
  /** The version being upgraded to. */
  targetVersion: z.string(),
  /** Estimated seconds of downtime. */
  expectedDowntimeSeconds: z.number(),
});

export type ServiceGroupUpdateStartingEvent = z.infer<
  typeof ServiceGroupUpdateStartingEventSchema
>;