import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { getHexcodeForEmoji, getShortcodeFor, getShortcodesFor } from './emoji';

describe('getHexcodeForEmoji', () => {
  it('converts a single astral codepoint to an uppercase hexcode', () => {
    // 😀 = U+1F600
    assert.equal(getHexcodeForEmoji('😀'), '1F600');
  });

  it('zero-pads BMP codepoints to at least four hex digits', () => {
    // ☺ = U+263A ; # = U+0023 (must pad "23" -> "0023")
    assert.equal(getHexcodeForEmoji('☺'), '263A');
    assert.equal(getHexcodeForEmoji('#'), '0023');
  });

  it('strips the FE0F variation selector by default', () => {
    // ❤️ = U+2764 U+FE0F
    assert.equal(getHexcodeForEmoji('❤️'), '2764');
  });

  it('keeps the variation selector when strip is false', () => {
    assert.equal(getHexcodeForEmoji('❤️', false), '2764-FE0F');
  });

  it('strips ZWJ (200D) joiners from a sequence by default', () => {
    // 👨‍👩‍👧 = 1F468 200D 1F469 200D 1F467
    assert.equal(getHexcodeForEmoji('👨‍👩‍👧'), '1F468-1F469-1F467');
  });

  it('keeps ZWJ joiners when strip is false', () => {
    assert.equal(getHexcodeForEmoji('👨‍👩‍👧', false), '1F468-200D-1F469-200D-1F467');
  });

  it('strips the FE0E text-presentation selector too', () => {
    // ▶ = U+25B6 ; ▶︎ = U+25B6 U+FE0E (text presentation)
    assert.equal(getHexcodeForEmoji('▶︎'), '25B6');
    assert.equal(getHexcodeForEmoji('▶︎', false), '25B6-FE0E');
  });

  it('handles a keycap sequence (padding + selector strip together)', () => {
    // #️⃣ = U+0023 U+FE0F U+20E3 -> "0023" + (FE0F stripped) + "20E3"
    assert.equal(getHexcodeForEmoji('#️⃣'), '0023-20E3');
  });

  it('handles degenerate inputs (empty string, plain ASCII per codepoint)', () => {
    assert.equal(getHexcodeForEmoji(''), '');
    assert.equal(getHexcodeForEmoji('ab'), '0061-0062');
  });
});

describe('getShortcodesFor / getShortcodeFor before emoji data is loaded', () => {
  // These gracefully degrade to `undefined` until loadEmojiData() has populated
  // the shortcode maps — the contract that lets tooltips/aria-labels render
  // eagerly without pulling the emojibase runtime into the eager graph.
  it('returns undefined for getShortcodesFor', () => {
    assert.equal(getShortcodesFor('1F600'), undefined);
  });

  it('returns undefined for getShortcodeFor', () => {
    assert.equal(getShortcodeFor('1F600'), undefined);
  });
});