const {chromium} = require('playwright');
const assert = require('node:assert/strict');
const fs = require('node:fs');
(async () => {
  const base = process.argv[2] || 'http://127.0.0.1:4173';
  const output = `.cache/sidebar-browser-${process.argv[3] || 'local'}`;
  const {documents} = JSON.parse(fs.readFileSync('.cache/sidebar-coverage.json', 'utf8'));
  assert(documents.length > 0);
  fs.mkdirSync(output, {recursive:true});
  const browser = await chromium.launch({headless:true, executablePath:process.env.PLAYWRIGHT_CHROMIUM_EXECUTABLE, args:['--no-sandbox']});
  const results = [];
  try {
    for (const width of [1440,390,320]) {
      const context = await browser.newContext({viewport:{width,height:900}});
      try {
        const page = await context.newPage();
        const errors = [];
        page.on('pageerror', e => errors.push(e.message));
        const menu = page.locator('.theme-doc-sidebar-menu').filter({visible:true});
        const open = async () => {
          if (width < 997) await page.getByRole('button', {name:'Toggle navigation bar'}).click();
          await menu.waitFor();
        };
        for (const doc of documents) {
          assert.equal((await page.goto(`${base}${doc.route}/`, {waitUntil:'networkidle'})).status(), 200);
          await page.locator('article h1').waitFor();
          await open();
          const links = menu.locator('a[href]:not([role="button"])').filter({visible:true});
          const active = await links.evaluateAll((nodes, route) => nodes.filter(n => n.pathname.replace(/\/$/,'') === route).map(n => n.textContent), doc.route);
          assert.equal(active.length, 1, `${width}: visible unique owning-sidebar entry for ${doc.route}`);
          results.push({width, route:doc.route, visibleEntry:active[0]});
        }
        // Contribution exposes all legacy maintenance pages without changing routes.
        for (const [label, route] of [['Starting point','overview'],['Update and publish','maintain'],['Site configuration','reference']]) {
          await page.goto(`${base}/eldorado-v1/documentation/contribution/`, {waitUntil:'networkidle'});
          await open();
          const toggle = menu.getByRole('button', {name:'Portal maintenance', exact:true});
          await toggle.focus();
          await page.keyboard.press('Enter');
          await menu.getByRole('link', {name:label, exact:true}).click();
          await page.waitForURL(`${base}/eldorado-v1/documentation/docs/${route}/`);
          await page.locator('article h1').waitFor();
        }
        const reference = '/eldorado-v1/documentation/strategy/reference/measurement-contracts/';
        await page.goto(`${base}${reference}#supported-bundle-coverage`, {waitUntil:'networkidle'});
        await page.waitForURL(`${base}/eldorado-v1/documentation/strategy/measurement/supported-bundle-coverage/`);
        await page.getByRole('heading', {level:1, name:'Supported bundle coverage', exact:true}).waitFor();
        assert((await page.locator('article').innerText()).includes('Supported bundle coverage'));
        assert.equal(await page.locator('.breadcrumbs a').filter({hasText:'One bounded experiment'}).getAttribute('href'), '/eldorado-v1/documentation/strategy/stage-01-skills-adoption/');
        assert((await page.locator('.breadcrumbs').innerText()).includes('Measurement'));
        await open();
        await menu.getByRole('link', {name:'Supported bundle coverage', exact:true}).waitFor({state:'visible'});
        await page.screenshot({path:`${output}/${width}-reference.png`, animations:'disabled'});
        assert.deepEqual(errors, []);
      } finally {await context.close();}
    }
    assert.equal(results.length, documents.length * 3);
    fs.writeFileSync(`${output}/results.json`, JSON.stringify(results,null,2));
    console.log(`PASS: all ${documents.length} docs have visible unique sidebar entries at 3 viewports; Contribution links, Measurement breadcrumbs and reported anchor redirect work`);
  } finally {await browser.close();}
})().catch(e => {console.error(e); process.exitCode = 1;});