import { test } from 'node:test';
import assert from 'node:assert/strict';
import { parseCount, parseViews } from '../src/lib/numbers.js';

test('parseCount understands Russian abbreviations', () => {
  assert.equal(parseCount('59 млн'), 59000000);
  assert.equal(parseCount('59 млн'), 59000000); // non-breaking space, as YouTube renders it
  assert.equal(parseCount('571 тыс.'), 571000);
  assert.equal(parseCount('1,8 млн'), 1800000);
  assert.equal(parseCount('3,4 млрд'), 3400000000);
  assert.equal(parseCount('123 тысячи'), 123000);
  assert.equal(parseCount('1,8 миллиона'), 1800000);
  assert.equal(parseCount('146 миллионов'), 146000000);
});

test('parseCount understands English abbreviations', () => {
  assert.equal(parseCount('1.2M'), 1200000);
  assert.equal(parseCount('1.2m'), 1200000);
  assert.equal(parseCount('123K'), 123000);
  assert.equal(parseCount('1.5B'), 1500000000);
  assert.equal(parseCount('2.5 million'), 2500000);
});

test('parseCount reads plain and grouped integers', () => {
  assert.equal(parseCount('37'), 37);
  assert.equal(parseCount('0'), 0);
  assert.equal(parseCount('12 345'), 12345);
  assert.equal(parseCount('12 345'), 12345);
  assert.equal(parseCount('1,234,567'), 1234567);
  assert.equal(parseCount('1.234.567'), 1234567);
});

test('parseCount ignores trailing "views" and "subscribers" words', () => {
  assert.equal(parseCount('59 миллионов просмотров'), 59000000);
  assert.equal(parseCount('1 просмотр'), 1);
  assert.equal(parseCount('571 тыс. подписчиков'), 571000);
  assert.equal(parseCount('1.2M views'), 1200000);
  assert.equal(parseCount('1.2M subscribers'), 1200000);
});

test('parseCount rejects anything that is not wholly a count', () => {
  for (const text of ['', 'Wun Wun', '10 л. назад', '2 г. назад', '7 дн. назад', '3 нед. назад', '1,2 тыс. зрителей', '5 Minute Crafts', 'abc', '1.2', '1,5']) {
    assert.equal(parseCount(text), null, text);
  }
  for (const value of [null, undefined, 123, {}]) {
    assert.equal(parseCount(value), null, String(value));
  }
});

test('parseViews adds the "no views" cases', () => {
  assert.equal(parseViews('Нет просмотров'), 0);
  assert.equal(parseViews('No views'), 0);
  assert.equal(parseViews('59 млн'), 59000000);
  assert.equal(parseViews('1,8 млн просмотров'), 1800000);
  assert.equal(parseViews('1.2M views'), 1200000);
});

test('parseViews rejects dates and names', () => {
  for (const text of ['10 л. назад', 'Wun Wun', '2 years ago', null, undefined]) {
    assert.equal(parseViews(text), null, String(text));
  }
});