import ignore from 'ignore';

// Common patterns to ignore, similar to .gitignore
export const IGNORE_PATTERNS = [
  'node_modules/**',
  '.git/**',
  'dist/**',
  'build/**',
  '.next/**',
  'coverage/**',
  '.cache/**',
  '.vscode/**',
  '.idea/**',
  '**/*.log',
  '**/.DS_Store',
  '**/npm-debug.log*',
  '**/yarn-debug.log*',
  '**/yarn-error.log*',
  '**/package-lock.json',
];

export const MAX_FILES = 1000;
export const ig = ignore().add(IGNORE_PATTERNS);

export const generateId = () => Math.random().toString(36).substring(2, 15);

export const isBinaryFile = async (file: File): Promise<boolean> => {
  const chunkSize = 1024;
  const buffer = new Uint8Array(await file.slice(0, chunkSize).arrayBuffer());

  for (let i = 0; i < buffer.length; i++) {
    const byte = buffer[i];

    if (byte === 0 || (byte < 32 && byte !== 9 && byte !== 10 && byte !== 13)) {
      return true;
    }
  }

  return false;
};

export const shouldIncludeFile = (path: string): boolean => {
  const projectDirectory = '/home/project/';

  if (path.startsWith(projectDirectory)) {
    path = path.substring(projectDirectory.length);
  }

  return !ig.ignores(path);
};