import { sanitize } from 'pretty-text/sanitizer';
import { default as PrettyText, buildOptions } from 'pretty-text/pretty-text';
import { hashString } from 'discourse/lib/hash';

// Run the MDTest spec
module("MDTest");

// This is cheating, but the trivial differences between sanitization
// do not affect formatting.
function normalize(str) {
  return str.replace(/\n\s*/g, '').
             replace(/ \/\>/g, '>').
             replace(/    ?/g, "\t").
             replace(/"/g, '"');
}

// We use a custom sanitizer for MD test that hoists out comments. In Discourse
// they are stripped, but to be compliant with the spec they should not be.
function sanitizer(result, whiteLister) {
  let hoisted;
  const m = result.match(/<!--[\s\S]*?-->/g);
  if (m && m.length) {
    hoisted = [];
    for (let i=0; i<m.length; i++) {
      const c = m[i];
      const id = hashString("discourse:hoisted-comment:" + i).toString();
      result = result.replace(c, id);
      hoisted.push([c, id]);
    }
  }

  result = sanitize(result, whiteLister);
  if (hoisted) {
    hoisted.forEach(tuple => result = result.replace(tuple[1], tuple[0]));
  }

  return result;
}

function md(assert, input, expected, text, settings) {

  const opts = buildOptions({ siteSettings: settings||{} });
  opts.traditionalMarkdownLinebreaks = true;
  opts.sanitizer = sanitizer;

  const cooker = new PrettyText(opts);
  const result = cooker.cook(input);
  const resultNorm = normalize(result);
  const expectedNorm = normalize(expected);
  const same = (result === expected) || (resultNorm === expectedNorm);

  if (same) {
    assert.ok(same, text);
  } else {
    assert.equal(resultNorm, expectedNorm, text);
  }
};

<%
  def mdtest_suite
    result = ""
    Dir.glob("#{Rails.root}/test/javascripts/mdtest/fixtures/*.text").each do |f|

      filename_no_ext = f.sub(/\.text$/, '')
      filename = Pathname.new(filename_no_ext)

      text = File.read(f)
      html = File.read("#{filename_no_ext}.xhtml");
      result << "test(\"#{filename}\", function(assert) { md(assert, #{text.to_json}, #{html.to_json}, 'passes MDTest'); });\n"
    end
    result
  end
%>

<%= mdtest_suite %>