import { validateGuestCommentEmail } from "../../utils/post-comment-guest";

export type ResolvedGuestFields = {
  guestEmail: string | null;
  guestIsAnonymous: boolean;
};

export function resolveGuestFields(input: {
  viewerPresent: boolean;
  guestEmail?: string;
  guestIsAnonymous?: boolean;
}): ResolvedGuestFields {
  if (input.viewerPresent) {
    return { guestEmail: null, guestIsAnonymous: false };
  }

  // 兼容过渡策略：旧客户端尚未上送 guestEmail/guestIsAnonymous 时，按匿名处理，避免发布窗口内全量 400。
  // 待所有客户端完成升级后可移除此分支，恢复严格“默认非匿名且邮箱必填”语义。
  const isLegacyGuestPayload = input.guestEmail == null && input.guestIsAnonymous === undefined;
  const guestIsAnonymous = input.guestIsAnonymous === true || isLegacyGuestPayload;
  const guestEmail = validateGuestCommentEmail(input.guestEmail, guestIsAnonymous);
  return { guestEmail, guestIsAnonymous };
}