import assert from 'node:assert/strict';
import { test } from 'node:test';
import { renderMarkdown } from '../src/render/markdown.ts';

const md = (text: string): string => String(renderMarkdown(text));

test('markup a commenter typed is text, not markup', () => {
  const out = md('<script>alert(1)</script> & "quoted"');
  assert.ok(!out.includes('<script>'));
  assert.match(out, /&lt;script&gt;/);
  assert.match(out, /&amp;/);
});

test('only http and https become links', () => {
  assert.match(md('[go](https://example.com/a)'), /<a href="https:\/\/example\.com\/a"/);
  // The label is still shown; it is only the link that is refused.
  const dangerous = md('[go](javascript:alert(1))');
  assert.ok(!dangerous.includes('<a '));
  assert.match(dangerous, /\[go\]/);
});

test('a bare URL is linked without swallowing the sentence it ends', () => {
  const out = md('see https://example.com/x.');
  assert.match(out, /href="https:\/\/example\.com\/x"/);
  assert.ok(out.endsWith('.</p>'), `trailing full stop should stay outside the link: ${out}`);
});

test('an ampersand in a link target survives as one', () => {
  const out = md('[x](https://example.com/?a=1&b=2)');
  assert.match(out, /href="https:\/\/example\.com\/\?a=1&amp;b=2"/);
});

test('a quote is a block of its own, so the reply is not read as part of it', () => {
  const out = md('> they said this\n\nand I disagree');
  assert.match(out, /<blockquote><p>they said this<\/p><\/blockquote><p>and I disagree<\/p>/);
});

test('quoting a quote keeps both levels', () => {
  assert.match(md('> > deep\n> shallow'), /<blockquote><blockquote>/);
});

test('emphasis does not fire inside a word', () => {
  // `snake_case_names` are ordinary in the subreddits this will be pointed at.
  assert.equal(md('some_variable_name'), '<p>some_variable_name</p>');
  assert.match(md('_yes_'), /<em>yes<\/em>/);
});

test('code is left exactly as typed', () => {
  assert.match(md('`a < b && c`'), /<code>a &lt; b &amp;&amp; c<\/code>/);
  assert.match(md('```\n<b>not bold</b>\n```'), /<pre><code>&lt;b&gt;not bold&lt;\/b&gt;<\/code><\/pre>/);
});

test('subreddit and user references link back to reddit', () => {
  assert.match(md('over in r/aww'), /href="https:\/\/www\.reddit\.com\/r\/aww"/);
  assert.match(md('ask u/someone'), /href="https:\/\/www\.reddit\.com\/u\/someone"/);
});

test('lists survive, both kinds', () => {
  assert.match(md('- one\n- two'), /<ul><li>one<\/li><li>two<\/li><\/ul>/);
  assert.match(md('1. one\n2. two'), /<ol><li>one<\/li><li>two<\/li><\/ol>/);
});

test('a single newline inside a paragraph is a line break, a blank line is a new one', () => {
  assert.equal(md('one\ntwo'), '<p>one<br>two</p>');
  assert.equal(md('one\n\ntwo'), '<p>one</p><p>two</p>');
});