/**
 * CommonMark 0.31.2 spec conformance runner.
 *
 * Loads js/statum.js through the DOM shim, renders every example in
 * spec-tests.json and compares (whitespace-normalised) against the expected
 * HTML. Sections listed in OUT_OF_SCOPE are counted separately: they cover
 * raw HTML pass-through and schemes we deliberately neutralise, so they are
 * excluded from the pass-rate denominator.
 *
 * Usage: qjs tests/markdown/spec-test.js [section-filter]
 */
import * as std from 'std';
import { installShim } from './shim.js';

var ROOT = import.meta.url ? '.' : '.';

function fail(msg) {
  std.err.puts(msg + '\n');
  std.exit(1);
}

installShim();
(0, eval)(std.loadFile('js/statum.js'));

var render = globalThis.statum._testMarkdown;
if (typeof render !== 'function') {
  fail('statum._testMarkdown is not exposed — was __STATUM_TEST__ set before loading?');
}

/** cmark-style normalisation: collapse whitespace runs, trim the ends. */
function normalize(html) {
  return String(html).replace(/[ \t\r\n]+/g, ' ').trim();
}

var OUT_OF_SCOPE = {
  'HTML blocks': 'raw HTML blocks are escaped, not passed through',
  'Raw HTML': 'inline raw HTML is escaped, not passed through'
};

var data;
try {
  data = JSON.parse(std.loadFile('tests/markdown/spec-tests.json'));
} catch (e) {
  fail('cannot read tests/markdown/spec-tests.json: ' + e);
}

var filter = scriptArgs.length > 1 ? scriptArgs[1] : null;
var sections = {};
var order = [];
var pass = 0, failCount = 0, skipped = 0;
var failures = [];

for (var i = 0; i < data.length; i++) {
  var t = data[i];
  if (filter && t.section.indexOf(filter) < 0) continue;
  if (Object.prototype.hasOwnProperty.call(OUT_OF_SCOPE, t.section)) { skipped++; continue; }

  var got;
  try {
    got = normalize(render(t.markdown));
  } catch (e) {
    got = '<<threw ' + e + '>>';
  }
  var expected = normalize(t.html);

  var sec = sections[t.section];
  if (!sec) {
    sec = sections[t.section] = { pass: 0, fail: 0 };
    order.push(t.section);
  }
  if (got === expected) {
    pass++; sec.pass++;
  } else {
    failCount++; sec.fail++;
    failures.push({ example: t.example, section: t.section, markdown: t.markdown, html: t.html, got: got });
  }
}

print('CommonMark 0.31.2 spec suite (in scope: ' + (pass + failCount) + ', out of scope: ' + skipped + ')');
print('');
for (var s = 0; s < order.length; s++) {
  var st = sections[order[s]];
  var total = st.pass + st.fail;
  print('  ' + pad(order[s], 38) + ' ' + pad(String(st.pass) + '/' + total, 8) +
        bar(st.pass, total));
}
print('');
var rate = (pass + failCount) ? (100 * pass / (pass + failCount)) : 0;
print('  ' + pad('TOTAL', 38) + ' ' + pad(pass + '/' + (pass + failCount), 8) + rate.toFixed(1) + '%');
print('');

if (failures.length && (!filter || scriptArgs.indexOf('-v') >= 0)) {
  print('failures:');
  for (var f = 0; f < failures.length; f++) {
    var x = failures[f];
    print('  #' + x.example + ' [' + x.section + '] ' + JSON.stringify(x.markdown));
    print('    got: ' + x.got);
    print('    exp: ' + normalize(x.html));
  }
  print('');
}

function pad(s, n) {
  while (s.length < n) s += ' ';
  return s;
}

function bar(p, total) {
  if (!total) return '';
  var filled = Math.round(20 * p / total);
  var s = '';
  for (var i = 0; i < 20; i++) s += i < filled ? '#' : '.';
  return ' |' + s + '|';
}

// Exit status is decided by the caller (run.sh) based on the target rate; we
// print the numbers and fail only on hard errors above.
std.exit(0);