const test = require('node:test');
const assert = require('node:assert');
const { buildTitleKeywords } = require('../lib/ytdlp.js');

// The keywords become `title ~= (?i)<kw>` match-filters in yt-dlp, i.e. every keyword must match
// the candidate title case-insensitively. This mirrors that check.
const accepts = (title, candidate) =>
  buildTitleKeywords(title).every(kw => new RegExp(kw, 'i').test(candidate));

test('a number in the title is always required, however short', () => {
  const kws = buildTitleKeywords('700 Main Street');
  assert.ok(kws.some(k => k.includes('700')), `700 fehlt in ${JSON.stringify(kws)}`);
});

test('rejects a same-shaped title with a different number', () => {
  // The real regression: "777 Main Street" (Release - Topic) was downloaded for DAT ADAM's
  // "700 Main Street", because only the two longest words (Street, Main) were required.
  assert.equal(accepts('700 Main Street', '777 Main Street'), false);
  assert.equal(accepts('700 Main Street', '700 Main Street'), true);
});

test('accepts the abbreviated spelling uploaders use', () => {
  assert.equal(accepts('700 Main Street', '700 Main st (cr-Version)'), true);
  assert.equal(accepts('700 Main Street', 'DAT ADAM - 700 Main St [FULL SONG]'), true);
});

test('the abbreviation does not match inside another word', () => {
  assert.equal(accepts('700 Main Street', '700 Main Stuff'), false);
});

test('titles without numbers keep the previous two-longest-words behaviour', () => {
  assert.deepEqual(buildTitleKeywords('Bohemian Rhapsody'), ['Bohemian', 'Rhapsody']);
  assert.equal(accepts('Bohemian Rhapsody', 'Queen - Bohemian Rhapsody (Official Video)'), true);
  assert.equal(accepts('Bohemian Rhapsody', 'Queen - Another One Bites The Dust'), false);
});

test('a remaster year is not required — YouTube titles never carry it', () => {
  // "… - 2020 Remaster" steht auf der Veröffentlichung, der Upload heißt schlicht
  // "Take Me Home, Country Roads". Vor dieser Ausnahme hätte die 2020 ihn abgelehnt.
  assert.equal(accepts('Take Me Home, Country Roads - 2020 Remaster',
                       'John Denver - Take Me Home, Country Roads'), true);
});

test('a year that IS the title stays required', () => {
  assert.equal(accepts('1999', 'Prince - 1999 (Official Music Video)'), true);
  assert.equal(accepts('1999', 'Prince - 1984 (Official Music Video)'), false);
});

const { buildVariantFilter } = require('../lib/ytdlp.js');

// Der Variantenfilter ist eine yt-dlp-Ausdruckskette "title !~= (?i)\bx\b & …".
// Diese Hilfsfunktion wertet sie so aus, wie yt-dlp es tut.
const variantAccepts = (searchTitle, candidate) => {
  const f = buildVariantFilter(searchTitle);
  if (!f) return true;
  return f.split(' & ').every(part => {
    const m = /^title !~= \(\?i\)(.+)$/.exec(part);
    return !new RegExp(m[1], 'i').test(candidate);
  });
};

test('rejects a live recording — is_live only covers running streams', () => {
  // Der echte Fall: auf dem Kuenstlerkanal, Dauer im Fenster, Titel passend.
  assert.equal(variantAccepts('UFO', 'Dat Adam - Ufo Video Days 2015 Live'), false);
  assert.equal(variantAccepts('UFO', 'DAT ADAM - 700 Main St | ROCK AM RING 2017 [LIVE]'), false);
  assert.equal(variantAccepts('UFO', 'UFO'), true);
});

test('a deliberately live title keeps its live results', () => {
  assert.equal(variantAccepts('Live Forever', 'Oasis - Live Forever'), true);
  assert.equal(variantAccepts('Unplugged in New York (Live)', 'Nirvana - All Apologies (Live)'), true);
});

test('"live" inside another word does not disable the rule', () => {
  // "deliver" enthaelt "live" als Teilstring — die Regel muss trotzdem greifen.
  assert.equal(variantAccepts('Deliver', 'Artist - Deliver (Live at Wembley)'), false);
  assert.equal(variantAccepts('Deliver', 'Artist - Deliver'), true);
});