import { readFile, writeFile, mkdir } from 'node:fs/promises';
import { resolve, dirname } from 'node:path';
import { pageRoutes } from '../src/server/pages/routes';
import { ROUTE_MIGRATIONS, toPublicPath } from '../src/lib/routes';

const labels: Record<string, string> = {
  Index: '首页', SearchMobile: '移动端搜索', Search: '搜索结果',
  About: '关于我们', Help: '帮助中心', Terms: '服务条款', Privacy: '隐私政策',
  Compliance2257: '2257 声明', DMCA: '版权声明', DownloadApp: '下载 App',
  Nav: '官方导航', HomeRoad: '回家的路', List: '短剧列表', MoreList: '短剧推荐栏目',
  MoreSeriesList: '剧集推荐栏目', Series: '剧集列表', Topic: '专题列表',
  TopicDetail: '专题详情', Rank: '排行榜', Tags: '标签详情',
  RecentlyAdded: '最新更新', PopularRecommend: '热门推荐', Play: '短剧播放',
  SeriesPlay: '剧集播放', Feedback: '意见反馈',
};

type CatalogRoute = { id: string; label: string; path: string; legacyPaths: string[]; selectable: boolean };
const routes = new Map<string, CatalogRoute>();
for (const [legacy, handler] of pageRoutes) {
  if (!labels[handler]) throw new Error('Missing page label: ' + handler);
  const path = toPublicPath(legacy);
  let entry = routes.get(path);
  if (!entry) {
    entry = { id: handler + ':' + path, label: labels[handler], path, legacyPaths: [], selectable: !path.includes(':') };
    routes.set(path, entry);
  }
  if (!entry.legacyPaths.includes(legacy)) entry.legacyPaths.push(legacy);
}
const catalog = JSON.stringify({ version: 1, routes: [...routes.values()] }, null, 2) + '\n';
const begin = '<!-- BEGIN PAGE_ROUTE_CATALOG -->';
const end = '<!-- END PAGE_ROUTE_CATALOG -->';
const inventory = [
  begin,
  '以下清单由 `npm run routes:export` 从实际路由注册生成，包含全部页面、筛选和分页模式。含 `:参数` 的路径需要填写真实值；后台导航下拉只展示可直接访问的固定入口，详情页和外链可手动输入。',
  '',
  '| 页面 | 原路径 | 当前路径 |',
  '| --- | --- | --- |',
  ...[...routes.values()].map(item => `| ${item.label} | ${item.legacyPaths.map(path => '`' + path + '`').join('、')} | \`${item.path}\` |`),
  '',
  end,
].join('\n');
const root = resolve(import.meta.dirname, '..');
const args = process.argv.slice(2);
const check = args.includes('--check');
const adminIndex = args.indexOf('--admin');
for (let i = 0; i < args.length; i++) {
  if (args[i] === '--admin') { i++; continue; }
  if (args[i] !== '--check') throw new Error('Usage: routes:export [--check] [--admin <admin-repository>]');
}
if (adminIndex >= 0 && (!args[adminIndex + 1] || args[adminIndex + 1].startsWith('--'))) throw new Error('--admin requires the admin repository path');
const readmePath = resolve(root, 'README.md');
const readme = await readFile(readmePath, 'utf8');
const start = readme.indexOf(begin), finish = readme.indexOf(end);
if (start < 0 || finish < start) throw new Error('README route inventory markers are missing');
const updatedReadme = readme.slice(0, start) + inventory + readme.slice(finish + end.length);
const outputs: [string, string][] = [[resolve(root, 'src/lib/page-route-catalog.json'), catalog], [readmePath, updatedReadme]];
if (adminIndex >= 0) {
  const adminRoot = resolve(args[adminIndex + 1]!);
  const pkg = JSON.parse(await readFile(resolve(adminRoot, 'package.json'), 'utf8'));
  if (pkg.name !== 'hkdj-web-admin') throw new Error('--admin must target the Huakui web admin repository');
  outputs.push([resolve(adminRoot, 'src/constants/hkdj-web-routes.json'), catalog]);
}
for (const [path, content] of outputs) {
  if (check) {
    if (await readFile(path, 'utf8') !== content) throw new Error('Route catalog is stale: ' + path);
  } else {
    await mkdir(dirname(path), { recursive: true });
    await writeFile(path, content);
  }
}
console.log(`${check ? 'Verified' : 'Exported'} ${ROUTE_MIGRATIONS.length} migrations, ${routes.size} page patterns, ${[...routes.values()].filter(item => item.selectable).length} navigation choices.`);