#!/usr/bin/env node
'use strict';

// 导出店铺运营数据为 JSON（用于 SQLite ↔ PostgreSQL 搬迁）
// 用法：
//   node scripts/db-export.js                      # 导出到 ops-export.json（不含原件）
//   node scripts/db-export.js out.json --with-files # 连原件一起导出（base64）
//
// 说明：不带 --with-files 时只导出元数据与数据行；导入端要求每个上传都有原件，
// 因此完整搬迁务必加 --with-files。

const fs = require('fs');
const path = require('path');
const { createContext } = require('../server/context.js');
const { createOpsStore } = require('../ops-store.js');

(async () => {
  const args = process.argv.slice(2);
  const withFiles = args.includes('--with-files');
  const outPath = path.resolve(args.find((a) => !a.startsWith('--')) || 'ops-export.json');

  const ctx = createContext();
  const store = createOpsStore(ctx.config);
  const health = await store.health();
  if (!health.ok) {
    console.error(`读取失败：${health.reason || 'storage-unreachable'} ${health.detail || ''}`);
    process.exit(1);
  }

  const uploads = await store.listUploads();
  if (withFiles) {
    for (const upload of uploads) {
      const record = await store.getContent(upload.id);
      upload.contentBase64 = record ? record.content.toString('base64') : '';
    }
  }
  const rows = await store.queryRows({});
  const summary = await store.summary();

  const payload = {
    version: 1,
    exportedAt: new Date().toISOString(),
    driver: store.kind,
    withFiles,
    uploads,
    shops: summary.shops,
    rows: rows.map((r) => ({
      date: r.date,
      shopKey: r.shopKey,
      uploadId: r.uploadId,
      shopId: r.shopId,
      shopName: r.shopName,
      school: r.school,
      status: r.status,
      order_cnt: r.order_cnt,
      revenue: r.revenue,
      exposure: r.exposure,
      click_rate: r.click_rate,
      raw: r.raw,
      quality: r.quality,
    })),
  };

  fs.writeFileSync(outPath, JSON.stringify(payload, null, 2));
  console.log(`已导出 ${uploads.length} 次上传、${rows.length} 行 → ${outPath}${withFiles ? '（含原件）' : '（不含原件）'}`);
  await store.close();
})();