/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import { describe, it, expect } from 'vitest';
import { escapeRegex, buildArgsPatterns } from './utils.js';

describe('policy/utils', () => {
  describe('escapeRegex', () => {
    it('should escape special regex characters', () => {
      const input = '.-*+?^${}()|[]\\ "';
      const escaped = escapeRegex(input);
      expect(escaped).toBe(
        '\\.\\-\\*\\+\\?\\^\\$\\{\\}\\(\\)\\|\\[\\]\\\\\\ \\"',
      );
    });

    it('should return the same string if no special characters are present', () => {
      const input = 'abcABC123';
      expect(escapeRegex(input)).toBe(input);
    });
  });

  describe('buildArgsPatterns', () => {
    it('should return argsPattern if provided and no commandPrefix/regex', () => {
      const result = buildArgsPatterns('my-pattern', undefined, undefined);
      expect(result).toEqual(['my-pattern']);
    });

    it('should build pattern from a single commandPrefix', () => {
      const result = buildArgsPatterns(undefined, 'ls', undefined);
      expect(result).toEqual(['"command":"ls(?:[\\s"]|$)']);
    });

    it('should build patterns from an array of commandPrefixes', () => {
      const result = buildArgsPatterns(undefined, ['ls', 'cd'], undefined);
      expect(result).toEqual([
        '"command":"ls(?:[\\s"]|$)',
        '"command":"cd(?:[\\s"]|$)',
      ]);
    });

    it('should build pattern from commandRegex', () => {
      const result = buildArgsPatterns(undefined, undefined, 'rm -rf .*');
      expect(result).toEqual(['"command":"rm -rf .*']);
    });

    it('should prioritize commandPrefix over commandRegex and argsPattern', () => {
      const result = buildArgsPatterns('raw', 'prefix', 'regex');
      expect(result).toEqual(['"command":"prefix(?:[\\s"]|$)']);
    });

    it('should prioritize commandRegex over argsPattern if no commandPrefix', () => {
      const result = buildArgsPatterns('raw', undefined, 'regex');
      expect(result).toEqual(['"command":"regex']);
    });

    it('should escape characters in commandPrefix', () => {
      const result = buildArgsPatterns(undefined, 'git checkout -b', undefined);
      expect(result).toEqual(['"command":"git\\ checkout\\ \\-b(?:[\\s"]|$)']);
    });

    it('should correctly escape quotes in commandPrefix', () => {
      const result = buildArgsPatterns(undefined, 'git "fix"', undefined);
      expect(result).toEqual([
        '"command":"git\\ \\\\\\"fix\\\\\\"(?:[\\s"]|$)',
      ]);
    });

    it('should handle undefined correctly when no inputs are provided', () => {
      const result = buildArgsPatterns(undefined, undefined, undefined);
      expect(result).toEqual([undefined]);
    });
  });
});