import path from 'path';

import { describe, expect, it } from 'vitest';
import { safeJoin, safeResolve } from '../../src/util/pathUtils';

/**
 * Helper to create file:// URLs in a cross-platform way
 */
function getFileUrl(path: string): string {
  return process.platform === 'win32'
    ? `file:///C:/${path.replace(/\\/g, '/')}`
    : `file:///${path}`;
}

describe('pathUtils', () => {
  describe('safeResolve', () => {
    it('returns absolute path unchanged', () => {
      const absolutePath = path.resolve('/absolute/path/file.txt');
      expect(safeResolve('some/base/path', absolutePath)).toBe(absolutePath);
    });

    it('returns file URL unchanged', () => {
      const fileUrl = getFileUrl('absolute/path/file.txt');
      expect(safeResolve('some/base/path', fileUrl)).toBe(fileUrl);
    });

    it('returns Windows file URL unchanged', () => {
      const windowsFileUrl = 'file://C:/path/file.txt';
      expect(safeResolve('some/base/path', windowsFileUrl)).toBe(windowsFileUrl);
    });

    it('returns HTTP URLs unchanged', () => {
      const httpUrl = 'https://example.com/file.txt';
      expect(safeResolve('some/base/path', httpUrl)).toBe(httpUrl);
    });

    it('resolves relative paths', () => {
      const expected = path.resolve('base/path', 'relative/file.txt');
      expect(safeResolve('base/path', 'relative/file.txt')).toBe(expected);
    });

    it('handles multiple path segments', () => {
      const absolutePath = path.resolve('/absolute/path/file.txt');
      expect(safeResolve('base', 'path', absolutePath)).toBe(absolutePath);

      const expected = path.resolve('base', 'path', 'relative/file.txt');
      expect(safeResolve('base', 'path', 'relative/file.txt')).toBe(expected);
    });

    it('handles empty input', () => {
      expect(safeResolve()).toBe(path.resolve());
      expect(safeResolve('')).toBe(path.resolve(''));
    });
  });

  describe('safeJoin', () => {
    it('returns absolute path unchanged', () => {
      const absolutePath = path.resolve('/absolute/path/file.txt');
      expect(safeJoin('some/base/path', absolutePath)).toBe(absolutePath);
    });

    it('returns file URL unchanged', () => {
      const fileUrl = getFileUrl('absolute/path/file.txt');
      expect(safeJoin('some/base/path', fileUrl)).toBe(fileUrl);
    });

    it('returns Windows file URL unchanged', () => {
      const windowsFileUrl = 'file://C:/path/file.txt';
      expect(safeJoin('some/base/path', windowsFileUrl)).toBe(windowsFileUrl);
    });

    it('returns HTTP URLs unchanged', () => {
      const httpUrl = 'https://example.com/file.txt';
      expect(safeJoin('some/base/path', httpUrl)).toBe(httpUrl);
    });

    it('joins relative paths', () => {
      const expected = path.join('base/path', 'relative/file.txt');
      expect(safeJoin('base/path', 'relative/file.txt')).toBe(expected);
    });

    it('handles multiple path segments', () => {
      const absolutePath = path.resolve('/absolute/path/file.txt');
      expect(safeJoin('base', 'path', absolutePath)).toBe(absolutePath);

      const expected = path.join('base', 'path', 'relative/file.txt');
      expect(safeJoin('base', 'path', 'relative/file.txt')).toBe(expected);
    });

    it('handles empty input', () => {
      expect(safeJoin()).toBe(path.join());
      expect(safeJoin('')).toBe(path.join(''));
    });
  });
});