#!/usr/bin/env node
/**
 * 强制重生成 Plaza 帖对应 workspace HTML 的缩略图（嵌入 hero 图）。
 *
 * Usage (103):
 *   node scripts/backfill-plaza-workspace-thumbnails.mjs --dry-run
 *   node scripts/backfill-plaza-workspace-thumbnails.mjs --apply
 *   node scripts/backfill-plaza-workspace-thumbnails.mjs --apply --batch-prefix plaza-batch-
 */
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { createDbPool } from '../db.mjs';
import { resolveMindSpaceUserPublishDir } from '../mindspace-runtime-config.mjs';
import { ensureWorkspaceHtmlThumbnail } from '../mindspace-workspace-thumbnails.mjs';

const root = path.join(path.dirname(fileURLToPath(import.meta.url)), '..');

function loadEnvFile(filePath) {
  if (!fs.existsSync(filePath)) return;
  for (const line of fs.readFileSync(filePath, 'utf8').split('\n')) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith('#')) continue;
    const eq = trimmed.indexOf('=');
    if (eq < 0) continue;
    const key = trimmed.slice(0, eq).trim();
    const value = trimmed.slice(eq + 1).trim();
    if (!process.env[key]) process.env[key] = value;
  }
}

loadEnvFile(path.join(root, '.env'));

function parseArgs() {
  const args = process.argv.slice(2);
  let apply = false;
  let batchPrefix = '';
  for (let i = 0; i < args.length; i += 1) {
    if (args[i] === '--apply') apply = true;
    else if (args[i] === '--dry-run') apply = false;
    else if (args[i] === '--batch-prefix' && args[i + 1]) batchPrefix = args[++i];
  }
  return { apply, batchPrefix };
}

const { apply, batchPrefix } = parseArgs();
const h5Root = process.env.H5_ROOT ?? path.join(root, 'users');
const pool = createDbPool();
const params = ['published'];
let batchFilter = '';
if (batchPrefix) {
  batchFilter = ' AND p.workspace_relative_path LIKE ?';
  params.push(`public/${batchPrefix}%`);
}

const [rows] = await pool.query(
  `SELECT pp.id AS post_id, pp.title, pp.user_id, p.workspace_relative_path
   FROM plaza_posts pp
   JOIN h5_publish_records pr ON pr.id = pp.publication_id
   JOIN h5_page_records p ON p.id = pr.page_id
   WHERE pp.status = ?
     AND p.workspace_relative_path LIKE 'public/%.html'
   ${batchFilter}
   ORDER BY pp.published_at DESC, pp.id DESC`,
  params,
);

console.log(`${apply ? '写入模式' : 'Dry-run'}：命中 ${rows.length} 条 workspace HTML 帖子。`);

let ok = 0;
let skipped = 0;
let failed = 0;

for (const row of rows) {
  const relativePath = String(row.workspace_relative_path ?? '').trim();
  if (!relativePath) {
    skipped += 1;
    continue;
  }
  const publishDir = resolveMindSpaceUserPublishDir(h5Root, { id: row.user_id });
  const htmlPath = path.join(publishDir, relativePath);
  if (!fs.existsSync(htmlPath)) {
    console.warn(`- SKIP ${row.post_id} | ${row.title} | missing ${relativePath}`);
    skipped += 1;
    continue;
  }
  console.log(`- ${row.post_id} | ${row.title} | ${relativePath}`);
  if (!apply) continue;
  try {
    await ensureWorkspaceHtmlThumbnail(publishDir, relativePath, null, {
      title: row.title,
      force: true,
    });
    ok += 1;
  } catch (error) {
    failed += 1;
    console.warn(
      `  FAIL ${row.post_id}:`,
      error instanceof Error ? error.message : error,
    );
  }
}

console.log(`完成：regenerated=${ok} skipped=${skipped} failed=${failed}`);
if (!apply) {
  console.log('Dry-run 未写入；正式执行: node scripts/backfill-plaza-workspace-thumbnails.mjs --apply');
}

await pool.end();