import { fetchMeinputRangeFull } from '../temporal-recall-service/adapters/meinput.mjs';
import { resolveCanonicalUserId } from '../user-model-service/canonical-user.mjs';

/**
 * @param {{ userId: string, range: { start: string, end: string } }} input
 */
export async function loadRainMeinputRecords(input) {
  const userId = resolveCanonicalUserId(input.userId);
  const records = await fetchMeinputRangeFull({
    userId,
    range: input.range,
  });
  return { userId, records };
}

/**
 * @param {Array<{ event_id?: string, text?: string, app_name?: string | null, app_bundle_id?: string | null, created_at?: string | Date }>} records
 * @param {{ range?: { start: string, end: string }, label?: string, source?: string }} meta
 */
export function formatMeinputFullBlock(records, meta = {}) {
  const lines = [
    '【MeInput 原始输入 · Rain】',
    `时间区间：${meta.label ?? ''} ${meta.range?.start?.slice(0, 16)?.replace('T', ' ') ?? ''} ~ ${meta.range?.end?.slice(0, 16)?.replace('T', ' ') ?? ''}`.trim(),
    `记录数：${records.length}`,
    '以下为按时间升序的原始按键/输入片段（含时间戳与应用信息），供分析使用；不要向用户暴露 recall 分数或内部字段名。',
    '',
  ];

  if (!records.length) {
    lines.push('（该时间区间内无 MeInput 记录）');
    return lines.join('\n').trim();
  }

  for (const row of records) {
    const ts =
      row.created_at instanceof Date
        ? row.created_at.toISOString()
        : String(row.created_at ?? '').trim();
    const local = ts ? ts.slice(0, 19).replace('T', ' ') : '';
    const app = row.app_name || row.app_bundle_id || 'unknown-app';
    const text = String(row.text ?? '').replace(/\s+/g, ' ').trim();
    lines.push(`- ${local} | app=${app} | ${text}`);
  }

  return lines.join('\n').trim();
}