export function summarizePersonalMemoryObservation(observation) {
  if (!observation || observation.skipped || !observation.enabled) {
    return { savedPreviews: [], autoReviewed: 0, pendingReview: 0 };
  }
  const savedPreviews = (observation.results ?? [])
    .filter((item) => item?.accepted && item?.candidate?.status === 'accepted')
    .map((item) => ({
      preview: String(item.candidate.content ?? '').slice(0, 60),
      policyReason: String(item.candidate.policyReason ?? ''),
      memoryType: String(item.candidate.memoryType ?? ''),
    }))
    .slice(0, 3);
  return {
    savedPreviews,
    autoReviewed: Number(observation.autoReviewed ?? 0),
    pendingReview: Number(observation.pendingReview ?? 0),
  };
}

export function formatPersonalMemorySavedNotice(summary) {
  if (!summary?.savedPreviews?.length) return null;
  const preview = summary.savedPreviews[0]?.preview;
  if (!preview) return null;
  return `已记住：${preview}${preview.length >= 60 ? '…' : ''}`;
}

export function formatMemoryRecallNotice(count) {
  const safeCount = Number(count ?? 0);
  if (!Number.isFinite(safeCount) || safeCount <= 0) return null;
  return `参考了你的 ${safeCount} 条记忆`;
}

const INTERNAL_MEMORY_PREVIEW_RES = [
  /^\[Memory Context\]/i,
  /^\[用户身份\]/,
  /^【TKMind 路由提示】/,
  /^【Memind 任务编排】/,
  /^\[MindSpace 上下文\]/,
];

export function buildMemoryRecallPreviews(memories, { limit = 5, maxLength = 80 } = {}) {
  if (!Array.isArray(memories)) return [];
  const previews = [];
  for (const item of memories) {
    const raw = String(item?.text ?? item?.content ?? '').trim();
    if (!raw) continue;
    if (INTERNAL_MEMORY_PREVIEW_RES.some((pattern) => pattern.test(raw))) continue;
    if (/\[Memory Context\]/i.test(raw)) continue;
    const clipped = raw.slice(0, maxLength);
    previews.push(clipped.length < raw.length ? `${clipped}…` : clipped);
    if (previews.length >= limit) break;
  }
  return previews;
}