import { extractHashtags } from './index';
import { Logger } from './log';

Logger.setLevel('error');

describe('hashtag extraction', () => {
  it('returns empty list if no tags are present', () => {
    expect(extractHashtags('hello world')).toEqual([]);
  });

  it('works with simple strings', () => {
    expect(
      extractHashtags('hello #world on #this planet').map(t => t.label)
    ).toEqual(['world', 'this']);
  });

  it('detects the offset of the tag', () => {
    expect(extractHashtags('#hello')).toEqual([{ label: 'hello', offset: 0 }]);
    expect(extractHashtags(' #hello')).toEqual([{ label: 'hello', offset: 1 }]);
    expect(extractHashtags('to #hello')).toEqual([
      { label: 'hello', offset: 3 },
    ]);
  });

  it('works with tags at beginning or end of text', () => {
    expect(
      extractHashtags('#hello world on this #planet').map(t => t.label)
    ).toEqual(['hello', 'planet']);
  });

  it('supports _ and -', () => {
    expect(
      extractHashtags('#hello-world on #this_planet').map(t => t.label)
    ).toEqual(['hello-world', 'this_planet']);
  });

  it('supports nested tags', () => {
    expect(
      extractHashtags('#parent/child on #planet').map(t => t.label)
    ).toEqual(['parent/child', 'planet']);
  });

  it('ignores tags that only have numbers in text', () => {
    expect(
      extractHashtags('this #123 tag should be ignore, but not #123four').map(
        t => t.label
      )
    ).toEqual(['123four']);
  });

  it('supports unicode letters like Chinese characters', () => {
    expect(
      extractHashtags(`
        this #tag_with_unicode_letters_汉字, pure Chinese tag like #纯中文标签 and 
        other mixed tags like #标签1 #123四 should work
      `).map(t => t.label)
    ).toEqual([
      'tag_with_unicode_letters_汉字',
      '纯中文标签',
      '标签1',
      '123四',
    ]);
  });

  it('supports emoji tags', () => {
    expect(
      extractHashtags(`this is a pure emoji #⭐, #⭐⭐, #👍👍🏽👍🏿 some mixed emoji #π🥧, #✅todo
       #urgent❗ or #❗❗urgent, and some nested emoji #📥/🟥 or #📥/🟢
      `).map(t => t.label)
    ).toEqual([
      '⭐',
      '⭐⭐',
      '👍👍🏽👍🏿',
      'π🥧',
      '✅todo',
      'urgent❗',
      '❗❗urgent',
      '📥/🟥',
      '📥/🟢',
    ]);
  });

  it('supports emoji tags with variant selectors (issue #1536)', () => {
    expect(
      extractHashtags('#🗃️/37-Education #🔖/37/Learning #🟣HOUSE #🟠MONEY').map(
        t => t.label
      )
    ).toEqual(['🗃️/37-Education', '🔖/37/Learning', '🟣HOUSE', '🟠MONEY']);
  });

  it('supports individual emojis with variant selectors', () => {
    // Test each emoji separately to debug
    expect(extractHashtags('#🗃️').map(t => t.label)).toEqual(['🗃️']);
    expect(extractHashtags('#🔖').map(t => t.label)).toEqual(['🔖']);
  });

  it('supports emojis that work without variant selector', () => {
    // These emojis should work with current implementation
    expect(extractHashtags('#📥 #⭐').map(t => t.label)).toEqual(['📥', '⭐']);
  });

  it('ignores hashes in plain text urls and links', () => {
    expect(
      extractHashtags(`
        test text with url https://site.com/#section1 https://site.com/home#section2 and
        https://site.com/home/#section3a
        [link](https://site.com/#section4) with [link2](https://site.com/home#section5) #control
        hello world
      `).map(t => t.label)
    ).toEqual(['control']);
  });

  it('ignores hashes in links to sections', () => {
    expect(
      extractHashtags(`
      this is a wikilink to [[#section1]] in the file and a [[link#section2]] in another
      this is a [link](#section3) to a section
      `)
    ).toEqual([]);
  });
});