import assert from 'node:assert/strict';
import { test } from 'node:test';
import { escapeHtml, html, raw } from '../src/render/html.ts';
import { linkify } from '../src/render/text.ts';
import { renderPost } from '../src/render/post.ts';
import { renderError } from '../src/render/error.ts';
import { oneSegment, type Media, type Post } from '../src/types.ts';

test('interpolations are escaped, Raw values are not', () => {
  assert.equal(html`<p>${'<script>alert(1)</script>'}</p>`.value,
    '<p>&lt;script&gt;alert(1)&lt;/script&gt;</p>');
  assert.equal(html`<p>${raw('<b>ok</b>')}</p>`.value, '<p><b>ok</b></p>');
  assert.equal(html`${['a', '<b>']}`.value, 'a&lt;b&gt;');
  assert.equal(html`${undefined}${null}${false}`.value, '');
});

test('attribute-breaking characters are escaped', () => {
  assert.equal(escapeHtml(`" onload='x'`), '&quot; onload=&#39;x&#39;');
});

test('post text is escaped before links are made', () => {
  const out = linkify('<img src=x onerror=alert(1)> https://example.com/a', 'x').value;
  assert.ok(!out.includes('<img'), 'markup in post text must not survive');
  assert.ok(out.includes('<a href="https://example.com/a"'));
});

test('mentions and hashtags point back at the right platform', () => {
  assert.ok(linkify('hi @nasa', 'tiktok').value.includes('https://www.tiktok.com/@nasa'));
  assert.ok(linkify('hi @nasa', 'bluesky').value.includes('https://bsky.app/profile/nasa'));
  // Threads has no hashtag pages, so a tag stays plain text there.
  assert.ok(!linkify('#moon', 'threads').value.includes('<a '));
  assert.ok(linkify('#moon', 'instagram').value.includes('explore/tags/moon'));
});

test('newlines become line breaks', () => {
  assert.equal(linkify('a\nb', 'x').value, 'a<br>b');
});

function post(overrides: Partial<Post> = {}): Post {
  return {
    platform: 'instagram',
    platformLabel: 'Instagram',
    originalUrl: 'https://www.instagram.com/p/ABC/',
    author: { handle: '@nasa' },
    textPosition: 'below',
    segments: oneSegment({
      text: 'caption',
      media: [{ kind: 'image', url: 'https://cdn/1.jpg' }, { kind: 'image', url: 'https://cdn/2.jpg' }],
    }),
    ...overrides,
  };
}

function withMedia(media: Media[], overrides: Partial<Post> = {}): Post {
  return post({ segments: oneSegment({ text: 'caption', media }), ...overrides });
}

test('media is proxied, never linked straight at the CDN', () => {
  const page = renderPost(post());
  assert.ok(!page.includes('https://cdn/1.jpg'), 'upstream URLs must not reach the page');
  assert.equal((page.match(/src="\/m\//g) ?? []).length, 2);
});

test('an HLS video is linked directly, because a proxy cannot rewrite a playlist', () => {
  const page = renderPost(withMedia([
    { kind: 'video', url: 'https://video.bsky.app/x/playlist.m3u8', hls: true, direct: true },
  ]));
  assert.ok(page.includes('https://video.bsky.app/x/playlist.m3u8'));
});

test('text sits below the media for Instagram and above it for X', () => {
  const below = renderPost(post());
  assert.ok(below.indexOf('class="media"') < below.indexOf('class="text"'));

  const above = renderPost(post({ platform: 'x', platformLabel: 'X', textPosition: 'above' }));
  assert.ok(above.indexOf('class="text"') < above.indexOf('class="media"'));
});

test('the layout toggle only appears when there is more than one item', () => {
  assert.ok(renderPost(post()).includes('data-view="grid"'));
  assert.ok(!renderPost(withMedia([{ kind: 'image', url: 'https://cdn/1.jpg' }]))
    .includes('data-view="grid"'));
});

test('a video gets native controls and a source, not an iframe', () => {
  const page = renderPost(withMedia([{ kind: 'video', url: 'https://cdn/v.mp4' }]));
  assert.ok(page.includes('<video'));
  assert.ok(page.includes('controls'));
  assert.ok(page.includes('playsinline'));
  assert.ok(!page.includes('<iframe'));
});

test('the copy button carries the clean original URL, and so does the page text', () => {
  const page = renderPost(post());
  assert.ok(page.includes('data-url="https://www.instagram.com/p/ABC/"'));
  assert.ok(page.includes('<code>https://www.instagram.com/p/ABC/</code>'));
});

test('a failure still hands the link back', () => {
  const page = renderError({
    platform: 'tiktok',
    platformLabel: 'TikTok',
    originalUrl: 'https://www.tiktok.com/@a/video/1',
    heading: 'Could not read that TikTok post',
    detail: 'TikTok showed a verification puzzle instead of the post.',
  });
  assert.ok(page.includes('data-url="https://www.tiktok.com/@a/video/1"'));
  assert.ok(page.includes('Open on TikTok'));
  assert.ok(page.includes('verification puzzle'));
});