/**
 * ─────────────────────────────────────────────
 *  SPB Git — Personal Git Platform
 * ─────────────────────────────────────────────
 *  Author  : Simon-Pierre Boucher
 *  Contact : contact@spboucher.ai
 *  File    : test/unit/languages.test.mjs
 *  Purpose : Unit tests — language detection + percentages
 *  License : MIT © Simon-Pierre Boucher
 * ─────────────────────────────────────────────
 */

import { describe, it, expect } from 'vitest';
import { detectLanguage, computeLanguages, languageColor } from '../../src/stats/languages.mjs';

describe('detectLanguage', () => {
  it('maps common extensions', () => {
    expect(detectLanguage('src/index.mjs')).toBe('JavaScript');
    expect(detectLanguage('main.py')).toBe('Python');
    expect(detectLanguage('lib.rs')).toBe('Rust');
    expect(detectLanguage('Dockerfile')).toBe('Dockerfile');
    expect(detectLanguage('CMakeLists.txt')).toBe('CMake');
    expect(detectLanguage('notes.md')).toBe('Markdown');
  });
  it('returns null for unknown files', () => {
    expect(detectLanguage('data.unknownext')).toBe(null);
    expect(detectLanguage('LICENSE')).toBe(null);
  });
});

describe('computeLanguages', () => {
  it('computes byte percentages, programming+markup only', () => {
    const { languages, totalBytes } = computeLanguages([
      { path: 'a.py', size: 750 },
      { path: 'b.js', size: 250 },
      { path: 'README.md', size: 5000 },       // prose → excluded
      { path: 'data.json', size: 9000 },        // data → excluded
      { path: 'node_modules/x.js', size: 4000 },// vendored → excluded
      { path: 'app.min.js', size: 12000 },      // minified → excluded
    ]);
    expect(totalBytes).toBe(1000);
    expect(languages[0]).toMatchObject({ name: 'Python', percent: 75 });
    expect(languages[1]).toMatchObject({ name: 'JavaScript', percent: 25 });
  });
  it('handles empty input', () => {
    expect(computeLanguages([]).languages).toEqual([]);
  });
});

describe('languageColor', () => {
  it('returns linguist colors with a grey fallback', () => {
    expect(languageColor('Python')).toBe('#3572A5');
    expect(languageColor('NotALanguage')).toBe('#8b93a3');
  });
});