import { test } from 'node:test';
import assert from 'node:assert/strict';
import {
  OUTLIER_SELECTOR,
  SUBSCRIBERS_SELECTOR,
  outlierScoreFromHref,
  parseVidiqScore,
  readVidiqData,
} from '../src/lib/vidiq.js';

const HREF =
  'https://app.vidiq.com/outliers?utm_source=chrome&utm_medium=extension&utm_content=&filters=%7B%22mode%22%3A%22long%22%7D' +
  '&outlier_score=146.19205697700949&video_id=Tts9NHL8D8I';

test('selectors point at VidIQ data attributes, not generated classes', () => {
  assert.equal(OUTLIER_SELECTOR, '[data-hover-popover="OutlierPopover"]');
  assert.equal(SUBSCRIBERS_SELECTOR, '[data-vidiq-subscriber-count]');
});

test('parseVidiqScore takes the first number in the text', () => {
  assert.equal(parseVidiqScore('>100x'), 100);
  assert.equal(parseVidiqScore('12.5x'), 12.5);
  assert.equal(parseVidiqScore('5,2x'), 5.2);
  assert.equal(parseVidiqScore('Outlier 8'), 8);
  for (const text of ['no digits', '', null, undefined]) assert.equal(parseVidiqScore(text), null, String(text));
});

test('outlierScoreFromHref reads and rounds the outlier_score parameter', () => {
  assert.equal(outlierScoreFromHref(HREF), 146.19);
  assert.equal(outlierScoreFromHref('https://app.vidiq.com/outliers?outlier_score=2'), 2);
});

test('outlierScoreFromHref returns null without a usable parameter', () => {
  for (const href of [
    'https://app.vidiq.com/outliers?video_id=x',
    'https://app.vidiq.com/outliers?outlier_score=',
    'https://app.vidiq.com/outliers?outlier_score=abc',
    '',
    null,
    undefined,
  ]) {
    assert.equal(outlierScoreFromHref(href), null, String(href));
  }
});

// A card stub: querySelector answers only for the two VidIQ selectors.
const cardWith = ({ outlier, subscribers }) => ({
  querySelector: (selector) =>
    selector === OUTLIER_SELECTOR ? outlier ?? null : selector === SUBSCRIBERS_SELECTOR ? subscribers ?? null : null,
});
const outlierNode = (text, href) => ({
  textContent: text,
  querySelector: (selector) =>
    selector === 'a' && href !== undefined ? { getAttribute: (name) => (name === 'href' ? href : null) } : null,
});

test('readVidiqData reads the exact score from the link and subscribers from the data attribute', () => {
  const card = cardWith({ outlier: outlierNode('>100x', HREF), subscribers: { textContent: '571 тыс.' } });
  assert.deepEqual(readVidiqData(card), { outlierScore: 146.19, subscribers: 571000 });
});

test('readVidiqData falls back to the badge text when the link has no score', () => {
  const card = cardWith({ outlier: outlierNode('>100x', 'https://app.vidiq.com/outliers'), subscribers: null });
  assert.deepEqual(readVidiqData(card), { outlierScore: 100, subscribers: null });
  const noLink = cardWith({ outlier: outlierNode('7.5x'), subscribers: null });
  assert.deepEqual(readVidiqData(noLink), { outlierScore: 7.5, subscribers: null });
});

test('readVidiqData returns nulls when VidIQ has not rendered its blocks', () => {
  assert.deepEqual(readVidiqData(cardWith({})), { outlierScore: null, subscribers: null });
});