import type { Colors, Navigation, NavigationEntry } from '@mintlify/models';
import { MintConfig, Tab } from '@mintlify/models';

import { retrieveTabLinks } from '../tabs/retrieve.js';
import type { Result } from '../types/result.js';
import { detectFramework, framework } from '../utils/detectFramework.js';
import { getErrorMessage } from '../utils/errors.js';
import { log } from '../utils/log.js';
import { fetchPageHtml, startPuppeteer } from '../utils/network.js';
import { getTitleFromLink } from '../utils/title.js';
import { defaultColors } from './color.js';
import { downloadLogos } from './logo.js';
import { htmlToHast } from './root.js';
import { scrapeSite } from './site.js';
import { downloadTitle } from './title.js';

export async function scrapeAllSiteTabs(
  html: string,
  url: string | URL
): Promise<Result<MintConfig>> {
  const hast = htmlToHast(html);
  url = new URL(url);

  detectFramework(hast);

  if (framework.vendor === 'readme' || framework.vendor === 'docusaurus') {
    const links = retrieveTabLinks(hast);
    if (
      !links ||
      !links.length ||
      (links.length === 1 && links[0] && links[0].url === url.pathname)
    )
      return scrapeSite(html, url, { hast });

    if (!links.find((link) => url.pathname.startsWith(link.url))) {
      links.push({
        name: getTitleFromLink(url.pathname),
        url: url.pathname,
      });
    }

    const results = await Promise.all(
      links.map(async (tabEntry) => {
        const newUrl = new URL(url);
        newUrl.pathname = tabEntry.url;
        try {
          const newHtml = await fetchPageHtml(newUrl, undefined);
          return await scrapeSite(newHtml, newUrl, { tabs: [tabEntry] });
        } catch (error) {
          return { success: false as const, message: getErrorMessage(error) };
        }
      })
    );

    const navigations: Array<NavigationEntry> = [];
    const tabs: Array<Tab> = [];
    let favicon = '/favicon.svg';
    let colors: Colors = defaultColors;

    const successes = results.filter((result) => result.success);
    successes.forEach((result) => {
      if (!result.data) return;
      navigations.push(...result.data.navigation);
      if (result.data.tabs) tabs.push(...result.data.tabs);
      if (result.data.favicon !== '/favicon.svg') favicon = result.data.favicon;
      if (result.data.colors !== defaultColors) colors = result.data.colors;
    });

    const failures = results.filter((result) => !result.success);
    failures.forEach((result) => {
      log('Failed to scrape tab' + result.message);
    });

    const needsBrowser = framework.vendor === 'readme';
    const browser = needsBrowser ? await startPuppeteer() : undefined;
    const logo = await downloadLogos(url, browser);
    const name = await downloadTitle(hast);
    if (browser) await browser.close();

    return {
      success: true,
      data: {
        $schema: 'https://mintlify.com/schema.json',
        name,
        logo,
        colors,
        favicon,
        navigation: navigations as Navigation,
        tabs,
      },
    };
  }

  return scrapeSite(html, url, { hast });
}