export type ApkEnvironment = 'dev' | 'sandbox' | 'product' | 'other';

export interface ParsedApkMetadata {
  environment: ApkEnvironment;
  commit: string | null;
  isValid: boolean;
}

// Environment mapping based on filename patterns
const ENVIRONMENT_MAP: Record<string, ApkEnvironment> = {
  'timeshift': 'dev',
  'lan': 'dev',
  'dev': 'dev',
  'sandbox': 'sandbox',
};

export function detectEnvironment(filename: string): ApkEnvironment {
  // Pattern: ft_[environment]_version_commit.apk
  // Extract the environment segment between first and second underscores
  const match = filename.match(/^ft_([^_]+)_/);

  if (!match) {
    // If it doesn't start with ft_ at all, it's an invalid format
    if (!filename.startsWith('ft_')) {
      return 'other';
    }
    // Starts with ft_ but has no additional segments (malformed), return 'other'
    return 'other';
  }

  const env = match[1].toLowerCase();

  // If the extracted segment starts with a digit, it's a version number, not an environment
  // This means it's a product APK with no environment suffix
  if (/^\d/.test(env)) {
    return 'product';
  }

  return ENVIRONMENT_MAP[env] || 'other';
}

export function parseApkFilename(filename: string): ParsedApkMetadata {
  const environment = detectEnvironment(filename);
  const commitMatch = filename.match(/([a-f0-9]{7,})\.apk$/);
  const commit = commitMatch ? commitMatch[1] : null;
  const isValid = commit !== null;

  return {
    environment,
    commit,
    isValid,
  };
}