/**
 * 36kr article search — DOM scraping.
 *
 * Navigates to the 36kr search results page and scrapes rendered articles.
 */
import { cli, Strategy } from '@jackwener/opencli/registry';
import { CliError } from '@jackwener/opencli/errors';
cli({
    site: '36kr',
    name: 'search',
    access: 'read',
    description: '搜索36氪文章',
    domain: 'www.36kr.com',
    strategy: Strategy.PUBLIC,
    browser: true,
    args: [
        { name: 'query', positional: true, required: true, help: 'Search keyword (e.g. "AI", "OpenAI")' },
        { name: 'limit', type: 'int', default: 20, help: 'Number of results (max 50)' },
    ],
    columns: ['rank', 'title', 'date', 'url'],
    func: async (page, args) => {
        const count = Math.min(Number(args.limit) || 20, 50);
        const query = encodeURIComponent(String(args.query ?? ''));
        await page.goto(`https://www.36kr.com/search/articles/${query}`);
        // Poll DOM until article links appear (36kr renders client-side)
        const deadline = Date.now() + 5000;
        while (Date.now() < deadline) {
            if (await page.evaluate('document.querySelectorAll("a[href*=\\"/p/\\"]").length'))
                break;
            await new Promise(r => setTimeout(r, 300));
        }
        const domItems = await page.evaluate(`
      (() => {
        const seen = new Set();
        const results = [];
        // article-item-title contains the clickable title link
        const titleEls = document.querySelectorAll('.article-item-title a[href*="/p/"], .article-item-title[href*="/p/"]');
        for (const el of titleEls) {
          const href = el.getAttribute('href') || '';
          const title = el.textContent?.trim() || '';
          if (!title || seen.has(href)) continue;
          seen.add(href);
          // Look for date near the article item
          const item = el.closest('[class*="article-item"]') || el.parentElement;
          const dateEl = item?.querySelector('[class*="time"], [class*="date"], time');
          const date = dateEl?.textContent?.trim() || '';
          results.push({
            title,
            url: href.startsWith('http') ? href : 'https://36kr.com' + href,
            date,
          });
        }
        // Fallback: generic /p/ links with meaningful text
        if (results.length === 0) {
          const links = document.querySelectorAll('a[href*="/p/"]');
          for (const el of links) {
            const href = el.getAttribute('href') || '';
            const title = el.textContent?.trim() || '';
            if (!title || title.length < 8 || seen.has(href) || seen.has(title)) continue;
            seen.add(href);
            seen.add(title);
            results.push({ title, url: href.startsWith('http') ? href : 'https://36kr.com' + href, date: '' });
          }
        }
        return results;
      })()
    `);
        const items = Array.isArray(domItems) ? domItems : [];
        if (items.length === 0) {
            throw new CliError('NO_DATA', 'No results found', `Try a different query or check your keyword`);
        }
        return items.slice(0, count).map((item, i) => ({
            rank: i + 1,
            title: item.title,
            date: item.date,
            url: item.url,
        }));
    },
});