/**
 * 清除冗余 String 字段——外键关系统一使用 Pointer
 *
 * 清除的字段:
 *   GroupChat: storeId, storeName, communityId, communityName
 *   Store:     districtId, districtName
 *   Community: storeId, storeName, districtId, districtName
 *
 * 前置条件: assign-store-ids.ts 已运行，所有 Pointer 字段已就位
 * 用法: npx tsx scripts/cleanup-redundant-fields.ts
 */
import 'dotenv/config';
import Parse from '../src/db/parse-client.js';

async function main(): Promise<void> {
  console.log('[Cleanup] 开始清除冗余 String 字段…\n');

  // 1. GroupChat: 移除 storeId, storeName, communityId, communityName
  console.log('[Cleanup] 处理 GroupChat…');
  const gq = new Parse.Query('GroupChat');
  gq.limit(1000);
  const groups = await gq.find({ useMasterKey: true });
  let gCleaned = 0;
  const gToSave: Parse.Object[] = [];

  for (const g of groups) {
    const hasStorePtr = !!g.get('store');
    const hasCommunityPtr = !!g.get('community');
    const hasStoreId = g.get('storeId');
    const hasStoreName = g.get('storeName');
    const hasCommunityId = g.get('communityId');
    const hasCommunityName = g.get('communityName');

    if (!hasStorePtr && !hasCommunityPtr && !hasStoreId && !hasStoreName && !hasCommunityId && !hasCommunityName) {
      continue;
    }

    // 只在 Pointer 已设置时清除对应的 String 字段
    if (hasStorePtr && (hasStoreId || hasStoreName)) {
      g.unset('storeId');
      g.unset('storeName');
      gCleaned++;
    }
    if (hasCommunityPtr && (hasCommunityId || hasCommunityName)) {
      g.unset('communityId');
      g.unset('communityName');
      gCleaned++;
    }

    gToSave.push(g);
  }

  if (gToSave.length > 0) {
    for (let i = 0; i < gToSave.length; i += 100) {
      await Parse.Object.saveAll(gToSave.slice(i, i + 100), { useMasterKey: true });
    }
  }
  console.log(`  GroupChat: ${groups.length} 条, 清除 ${gCleaned} 个冗余字段`);

  // 2. Store: 移除 districtId, districtName
  console.log('[Cleanup] 处理 Store…');
  const sq = new Parse.Query('Store');
  sq.limit(500);
  const stores = await sq.find({ useMasterKey: true });
  let sCleaned = 0;
  const sToSave: Parse.Object[] = [];

  for (const s of stores) {
    const hasDistrictPtr = !!s.get('district');
    const hasDistrictId = s.get('districtId');

    if (hasDistrictPtr && hasDistrictId !== undefined) {
      s.unset('districtId');
      s.unset('districtName');
      sCleaned++;
      sToSave.push(s);
    }
  }

  if (sToSave.length > 0) {
    await Parse.Object.saveAll(sToSave, { useMasterKey: true });
  }
  console.log(`  Store: ${stores.length} 条, 清除 ${sCleaned} 个冗余字段`);

  // 3. Community: 移除 storeId, storeName, districtId, districtName
  console.log('[Cleanup] 处理 Community…');
  const cq = new Parse.Query('Community');
  cq.limit(500);
  const communities = await cq.find({ useMasterKey: true });
  let cStoreCleaned = 0;
  let cDistrictCleaned = 0;
  const cToSave: Parse.Object[] = [];

  for (const c of communities) {
    let changed = false;
    const hasStorePtr = !!c.get('store');
    if (hasStorePtr && c.get('storeId') !== undefined) {
      c.unset('storeId');
      c.unset('storeName');
      cStoreCleaned++;
      changed = true;
    }
    if (c.get('districtId') !== undefined || c.get('districtName') !== undefined) {
      c.unset('districtId');
      c.unset('districtName');
      cDistrictCleaned++;
      changed = true;
    }
    if (changed) cToSave.push(c);
  }

  if (cToSave.length > 0) {
    await Parse.Object.saveAll(cToSave, { useMasterKey: true });
  }
  console.log(`  Community: ${communities.length} 条, store 冗余 ${cStoreCleaned}, district 冗余 ${cDistrictCleaned}`);

  console.log('\n[Cleanup] 全部完成!');
}

main().catch((err) => {
  console.error('[Cleanup] 失败:', err);
  process.exit(1);
});