/**
 * 长任务断线自动重试：用显式 reconnectRunId 跨 attempt 保留，
 * 禁止依赖 setState updater / 已被清空的 stream.runId。
 */

export function resolveReconnectRunId(input: {
  attemptIndex: number;
  optsReconnectRunId?: string | null;
}): string | undefined {
  const fromOpts = input.optsReconnectRunId?.trim();
  if (fromOpts) return fromOpts;
  // attempt 0 且无显式 id → 允许新 POST；重试必须靠 opts 传入
  return undefined;
}

export function shouldSubscribeExistingRun(status: string | null | undefined): boolean {
  return status === 'running' || status === 'pending';
}

export function isRemoteTaskTerminal(status: string | null | undefined): boolean {
  return (
    status === 'completed' ||
    status === 'pending_author_confirmation' ||
    status === 'quality_failed' ||
    status === 'blocked_pending_governance' ||
    status === 'interrupted'
  );
}

/** 自动重试调度时把已知 runId 写入下一轮 opts，避免 abort 后丢失。 */
export function nextAttemptOpts<T extends { reconnectRunId?: string }>(
  opts: T | undefined,
  retainedRunId: string | undefined,
): T & { reconnectRunId?: string } {
  const base = { ...(opts || ({} as T)) };
  if (retainedRunId) {
    return { ...base, reconnectRunId: retainedRunId };
  }
  return base;
}