import { describe, it, expect } from 'vitest';
import { parseBashCommand } from '../tool-registry';

describe('empty quoted arguments', () => {
  it('preserves empty double-quoted arg', () => {
    const args = parseBashCommand('echo "first" "" "third"');
    expect(args).toEqual(['echo', 'first', '', 'third']);
  });

  it('preserves empty single-quoted arg', () => {
    const args = parseBashCommand("echo 'first' '' 'third'");
    expect(args).toEqual(['echo', 'first', '', 'third']);
  });
});

describe('backslash handling in double quotes', () => {
  it('preserves literal backslash-n in double quotes', () => {
    const args = parseBashCommand('echo "test\\nline"');
    expect(args[1]).toBe('test\\nline');
  });

  it('handles escaped double quote inside double quotes', () => {
    const args = parseBashCommand('echo "say \\"hello\\""');
    expect(args[1]).toBe('say "hello"');
  });

  it('handles escaped backslash inside double quotes', () => {
    const args = parseBashCommand('echo "path\\\\to\\\\file"');
    expect(args[1]).toBe('path\\to\\file');
  });

  it('preserves backslash-t in double quotes', () => {
    const args = parseBashCommand('echo "col1\\tcol2"');
    expect(args[1]).toBe('col1\\tcol2');
  });
});

describe('brace expansion respects quotes', () => {
  it('does not expand braces inside single-quoted arg', () => {
    const args = parseBashCommand("sed -i 's/old/{x: 1, y: 2}/' /file.txt");
    const sedExpr = args.find(a => a.startsWith('s/'));
    expect(sedExpr).toBe('s/old/{x: 1, y: 2}/');
  });

  it('does not expand braces inside double-quoted arg', () => {
    const args = parseBashCommand('echo "file{1,2,3}.txt"');
    expect(args[1]).toBe('file{1,2,3}.txt');
  });

  it('expands braces in unquoted arguments', () => {
    const args = parseBashCommand('echo file{1,2,3}.txt');
    expect(args).toContain('file1.txt');
    expect(args).toContain('file2.txt');
    expect(args).toContain('file3.txt');
  });
});