import { describe, it, expect } from 'vitest';
import { extToLang } from './lang-detect.ts';

describe('extToLang', () => {
  // Standard extensions
  it('detects python', () => expect(extToLang('main.py')).toBe('python'));
  it('detects typescript', () => expect(extToLang('app.ts')).toBe('typescript'));
  it('detects bash by .sh', () => expect(extToLang('install.sh')).toBe('bash'));
  it('detects toml by extension', () => expect(extToLang('pyproject.toml')).toBe('toml'));
  it('detects yaml', () => expect(extToLang('config.yml')).toBe('yaml'));
  it('detects json', () => expect(extToLang('data.json')).toBe('json'));
  it('detects markdown', () => expect(extToLang('README.md')).toBe('markdown'));

  // Dotfiles (no extension)
  it('detects .museattributes as toml', () => expect(extToLang('.museattributes')).toBe('toml'));
  it('detects .museignore as toml', () => expect(extToLang('.museignore')).toBe('toml'));

  // Dotfiles in nested paths
  it('detects nested .museattributes as toml', () => expect(extToLang('subdir/.museattributes')).toBe('toml'));
  it('detects .muse/code_config.toml as toml', () => expect(extToLang('.muse/code_config.toml')).toBe('toml'));

  // bats
  it('detects .bats as bash', () => expect(extToLang('tests/test_plugin.bats')).toBe('bash'));

  // Zsh completion files — _<command> with no extension
  it('detects _muse as bash', () => expect(extToLang('_muse')).toBe('bash'));
  it('detects completions/_muse as bash', () => expect(extToLang('completions/_muse')).toBe('bash'));
  it('detects _git as bash', () => expect(extToLang('_git')).toBe('bash'));

  // Fallback
  it('falls back to plaintext for unknown extension', () => expect(extToLang('data.bin')).toBe('plaintext'));
  it('falls back to plaintext for unknown dotfile', () => expect(extToLang('.somethingelse')).toBe('plaintext'));
});