export function polylint(path, options) {
  if (!options) {
    options = {};
  }
  options.attachAST = true;
  options.filter = function(){
    return false;
  };
  if (!('redirect' in options)) {
    options.redirect = "bower_components";
  }
  var analyzer;
  return hydrolysis.Analyzer.analyze(path, options).then(function(_analyzer){
    analyzer = _analyzer;
    return analyzer.html[path].depsLoaded;
  }).then(function(){
    var allWarnings = [];
    for (var linterName in linters) {
      var linter = linters[linterName];
      var warnings = linter(analyzer, path, options);

      allWarnings = allWarnings.concat(warnings);
    }
    return allWarnings;
  }).catch(function(err){
    throw err;
  });
}

/**
 * Analyzes all of the HTML in 'repos/*' with hydrolysis.
 *
 * Returns a promise of the hydrolysis.Analyzer with all of the info loaded.
 */
async function analyzeRepos() {
  const dirs = fs.readdirSync('repos/');
  const htmlFiles: string[] = [];

  for (const dir of dirs) {
    for (const fn of fs.readdirSync(path.join('repos', dir))) {
      if (/index\.html|dependencies\.html/.test(fn) || !fn.endsWith('.html')) {
        continue;
      }
      // We want to ignore files with 'demo' in them, unless the element's
      // directory has the word 'demo' in it, in which case that's
      // the whole point of the element.
      if (!/\bdemo\b/.test(dir) && /demo/.test(fn)) {
        continue;
      }
      htmlFiles.push(path.join('repos', dir, fn));
    }
  }

  function filter(repo: string) { return !existsSync(repo); }

  // This code is conceptually simple, it's only complex due to ordering
  // and the progress bar. Basically we call analyzer.metadataTree on each
  // html file in sequence, then finally call analyzer.annotate() and return.
  const analyzer =
      await hydrolysis.Analyzer.analyze('repos/polymer/polymer.html', {filter});

  const progressBar = new ProgressBar(
      `:msg [:bar] :percent`,
      {total: htmlFiles.length + 1, width: progressBarWidth});

  for (const htmlFile of htmlFiles) {
    await analyzer.metadataTree(htmlFile);
    const msg = pad(
        `Analyzing ${htmlFile.slice(6)}`, progressMessageWidth, {strip: true});
    progressBar.tick({msg});
  }


  progressBar.tick(
      {msg: pad('Analyzing with hydrolysis...', progressMessageWidth)});
  analyzer.annotate();
  return analyzer;
}

/**
 * Analyzes all of the HTML in 'repos/*' with hydrolysis.
 *
 * Returns a promise of the hydrolysis.Analyzer with all of the info loaded.
 */
async function analyzeRepos() {
  const dirsToConsider: string[] = [];
  const htmlFiles: string[] = [];

  for (const dir of fs.readdirSync('repos/')) {
    dirsToConsider.push(path.join('repos', dir));
    for (const filename of fs.readdirSync(path.join('repos', dir))) {
      try {
        const stat = fs.statSync(path.join('repos', dir, filename));
        if (!stat.isDirectory()) {
          continue;
        }
      } catch (e) {
        continue;
      }
      if (filename.startsWith('.')) {
        continue;
      }
      const dirnamesToIgnore = new Set([
        'test',
        'util',
        'explainer',
        'src',
        'helpers',
        'site',
        'templates',
        'viewer',
        'demo',
        'patterns'
      ]);
      if (dirnamesToIgnore.has(path.basename(filename))) {
        continue;
      }
      dirsToConsider.push(path.join('repos', dir, filename));
    }
  }

  for (const dir of dirsToConsider) {
    for (const filename of fs.readdirSync(dir)) {
      if (/index\.html|dependencies\.html/.test(filename) ||
          !filename.endsWith('.html')) {
        continue;
      }
      // We want to ignore files with 'demo' in them, unless the element's
      // directory has the word 'demo' in it, in which case that's
      // the whole point of the element.
      if (!/\bdemo\b/.test(dir) && /demo/.test(filename)) {
        continue;
      }
      htmlFiles.push(path.join(dir, filename));
    }
  }

  function filter(repo: string) {
    return !existsSync(repo);
  }

  // This code is conceptually simple, it's only complex due to ordering
  // and the progress bar. Basically we call analyzer.metadataTree on each
  // html file in sequence, then finally call analyzer.annotate() and return.
  const analyzer =
      await hydrolysis.Analyzer.analyze('repos/polymer/polymer.html', {filter});


  const progressBar = new MaybeProgressBar(
      `:msg [:bar] :percent`,
      {total: htmlFiles.length + 1, width: progressBarWidth});

  for (const htmlFile of htmlFiles) {
    await analyzer.metadataTree(htmlFile);
    const msg = pad(
        `Analyzing ${htmlFile.slice(6)}`, progressMessageWidth, {strip: true});
    progressBar.tick({msg});
  }


  progressBar.tick(
      {msg: pad('Analyzing with hydrolysis...', progressMessageWidth)});
  analyzer.annotate();
  return analyzer;
}