type RuntimeInvalidationReason = 'account-health' | 'publish-task-lease'

type RuntimeInvalidationListener = (event: {
  reason: RuntimeInvalidationReason
  at: number
  accountId?: string
  taskId?: string
}) => void

const listeners = new Set<RuntimeInvalidationListener>()

export function emitRuntimeInvalidated(
  reason: RuntimeInvalidationReason,
  details: { accountId?: string; taskId?: string } = {},
): void {
  const event = {
    reason,
    at: Date.now(),
    ...details,
  } as const

  for (const listener of listeners) {
    try {
      listener(event)
    } catch (error) {
      console.warn('[desktop-runtime] invalidation listener failed', {
        reason,
        message: error instanceof Error ? error.message : String(error),
      })
    }
  }
}

export function onRuntimeInvalidated(listener: RuntimeInvalidationListener): () => void {
  listeners.add(listener)
  return () => {
    listeners.delete(listener)
  }
}