// 已读取AGENTS.md
/**
 * 历史数据归属订正脚本（一次性）
 *
 * 用途：
 *  1) companions.user_id 为 NULL 的历史大神：按"昵称唯一匹配用户"回填绑定；
 *  2) finance_records.user_id 缺失(0/NULL) 的历史资金流水：按充值/提现/订单/对手方规则回填归属。
 *
 * 安全：默认 **只预览(dry-run)**，不写库；确认无误后加 `--apply` 执行。
 *
 * 用法（在 server 目录）：
 *   npx tsx scripts/backfill-ownership.ts            # 预览
 *   npx tsx scripts/backfill-ownership.ts --apply    # 执行
 */
import { initDatabase, pool } from '../src/db/mysql';

const APPLY = process.argv.includes('--apply');

async function backfillCompanions() {
  const [rows]: any = await pool.query(
    'SELECT id, name FROM companions WHERE user_id IS NULL ORDER BY id ASC'
  );
  let linked = 0;
  let ambiguous = 0;
  let noUser = 0;
  const examples: any[] = [];

  for (const c of rows || []) {
    const [users]: any = await pool.query('SELECT id FROM users WHERE nickname = ? LIMIT 2', [c.name]);
    if (!users || users.length === 0) {
      noUser += 1;
      continue;
    }
    if (users.length > 1) {
      ambiguous += 1;
      continue;
    }
    const uid = Number(users[0].id) || 0;
    if (!uid) {
      noUser += 1;
      continue;
    }
    // 一个用户只允许绑定一个历史大神档案，避免重复占用
    const [occupied]: any = await pool.query(
      'SELECT id FROM companions WHERE user_id = ? AND id <> ? LIMIT 1',
      [uid, c.id]
    );
    if (occupied && occupied.length > 0) {
      ambiguous += 1;
      continue;
    }
    if (APPLY) {
      await pool.query('UPDATE companions SET user_id = ? WHERE id = ? AND user_id IS NULL', [uid, c.id]);
    }
    linked += 1;
    if (examples.length < 10) examples.push({ companionId: c.id, name: c.name, userId: uid });
  }

  return { total: (rows || []).length, linked, ambiguous, noUser, examples };
}

async function backfillFinanceRecords() {
  const [rows]: any = await pool.query(
    'SELECT id, type, related_id, counterparty FROM finance_records WHERE (user_id IS NULL OR user_id = 0) ORDER BY id ASC'
  );
  let filled = 0;
  let skipped = 0;
  const examples: any[] = [];

  for (const r of rows || []) {
    const type = String(r.type || '');
    const rel = String(r.related_id || '');
    let uid = 0;

    try {
      if (/充值/.test(type) && rel) {
        // 充值流水：related_id = 支付意图 out_trade_no
        const [pi]: any = await pool.query(
          'SELECT user_id FROM payment_intents WHERE out_trade_no = ? LIMIT 1',
          [rel]
        );
        uid = Number((pi && pi[0] && pi[0].user_id) || 0);
      } else if (/提现/.test(type) && rel) {
        // 提现流水：related_id = 提现单 id
        const [wd]: any = await pool.query(
          'SELECT companion_id FROM withdrawals WHERE id = ? LIMIT 1',
          [rel]
        );
        uid = Number((wd && wd[0] && wd[0].companion_id) || 0);
      } else if (rel) {
        // 订单相关流水：related_id = 订单 id / order_no
        const [ordRows]: any = await pool.query(
          'SELECT id, buyer_id, expert_id FROM orders WHERE id = ? OR order_no = ? LIMIT 1',
          [rel, rel]
        );
        const ord = ordRows && ordRows[0];
        if (ord) {
          if (/退款|支付/.test(type)) {
            uid = Number(ord.buyer_id) || 0;
          } else if (/结算|完单/.test(type)) {
            const [cp]: any = await pool.query(
              'SELECT user_id FROM companions WHERE id = ? LIMIT 1',
              [ord.expert_id]
            );
            uid = Number((cp && cp[0] && cp[0].user_id) || 0) || Number(ord.expert_id) || 0;
          }
        }
      }

      // 兜底：从对手方文本"用户 1001"中解析用户ID
      if (!uid) {
        const m = String(r.counterparty || '').match(/用户\s*(\d+)/);
        if (m) uid = Number(m[1]) || 0;
      }
    } catch (e) {
      uid = 0;
    }

    if (uid > 0) {
      if (APPLY) {
        await pool.query(
          'UPDATE finance_records SET user_id = ? WHERE id = ? AND (user_id IS NULL OR user_id = 0)',
          [uid, r.id]
        );
      }
      filled += 1;
      if (examples.length < 10) examples.push({ id: r.id, type, userId: uid });
    } else {
      skipped += 1;
    }
  }

  return { total: (rows || []).length, filled, skipped, examples };
}

async function main() {
  await initDatabase();
  console.log(`[Backfill] 模式：${APPLY ? 'APPLY（写库）' : 'DRY-RUN（仅预览，不写库）'}`);

  const companions = await backfillCompanions();
  console.log('[Backfill] companions.user_id:', JSON.stringify(companions));

  const finance = await backfillFinanceRecords();
  console.log('[Backfill] finance_records.user_id:', JSON.stringify(finance));

  if (!APPLY) {
    console.log('\n[Backfill] 以上为预览结果；确认无误后执行：npx tsx scripts/backfill-ownership.ts --apply');
  } else {
    console.log('\n[Backfill] 已完成写库。');
  }
  await pool.end();
}

main().catch((e) => {
  console.error('[Backfill] 执行失败:', e);
  process.exit(1);
});