import { describe, it, expect } from 'vitest';

import {
  baseName,
  dirName,
  ensureMdExtension,
  normalizeRelPath,
  relPathFrom,
  stripMdExtension,
} from './paths';

describe('normalizeRelPath', () => {
  it('collapses repeated slashes and drops `.` segments', () => {
    expect(normalizeRelPath('a//b')).toBe('a/b');
    expect(normalizeRelPath('./a/./b')).toBe('a/b');
  });

  it('resolves `..`', () => {
    expect(normalizeRelPath('a/../b')).toBe('b');
    expect(normalizeRelPath('a/b/../../c')).toBe('c');
  });

  it('clamps `..` at the root rather than escaping the vault', () => {
    expect(normalizeRelPath('../../etc/passwd')).toBe('etc/passwd');
  });

  it('strips a leading slash and converts backslashes', () => {
    expect(normalizeRelPath('/a/b')).toBe('a/b');
    expect(normalizeRelPath('a\\b')).toBe('a/b');
  });
});

describe('md extension helpers', () => {
  it('strips `.md` case-insensitively', () => {
    expect(stripMdExtension('Note.md')).toBe('Note');
    expect(stripMdExtension('Note.MD')).toBe('Note');
    expect(stripMdExtension('Note')).toBe('Note');
  });

  it('appends `.md` to a name containing a dot', () => {
    // createFile's own auto-append would skip this one and create an
    // extensionless file, which is why callers go through here.
    expect(ensureMdExtension('Release v1.2')).toBe('Release v1.2.md');
  });

  it('does not double up an existing extension', () => {
    expect(ensureMdExtension('Note.md')).toBe('Note.md');
  });
});

describe('relPathFrom', () => {
  it('strips the root prefix', () => {
    expect(relPathFrom('/vault', '/vault/a/b.md')).toBe('a/b.md');
  });

  it('tolerates a trailing slash on the root', () => {
    expect(relPathFrom('/vault/', '/vault/a.md')).toBe('a.md');
  });

  it('normalizes a path outside the root instead of producing nonsense', () => {
    expect(relPathFrom('/vault', '/other/a.md')).toBe('other/a.md');
  });
});

describe('baseName / dirName', () => {
  it('splits a nested path', () => {
    expect(baseName('a/b/c.md')).toBe('c.md');
    expect(dirName('a/b/c.md')).toBe('a/b');
  });

  it('returns an empty dir at the top level', () => {
    expect(dirName('c.md')).toBe('');
  });
});