/**
 * Minimal local copy of the DSH user-message constructor.
 *
 * The bundle must load in a profile whose module resolution does not include
 * the DSH installation's internal packages. `createUserMessage` in
 * `@deepseek-ai/dsh-llm` is only `{ ...input, role: "user", id: randomUUID() }`
 * plus a deep freeze, so keeping a local copy removes the only runtime import
 * outside this package.
 */

import { randomUUID } from 'node:crypto'

function deepFreeze(value) {
  if (value === null || typeof value !== 'object' || Object.isFrozen(value)) return value
  Object.freeze(value)
  for (const child of Object.values(value)) deepFreeze(child)
  return value
}

/** Create an immutable user-role message with a fresh identity. */
export function createUserMessage(input) {
  const message = {
    ...structuredClone(input),
    role: 'user',
    id: randomUUID(),
  }
  return deepFreeze(message)
}