/**
 * Base error class for smartupdate errors
 */
export class SmartUpdateError extends Error {
  constructor(message: string) {
    super(message);
    this.name = 'SmartUpdateError';
    // Maintains proper stack trace for where our error was thrown (only available on V8)
    if (Error.captureStackTrace) {
      Error.captureStackTrace(this, this.constructor);
    }
  }
}

/**
 * Error thrown when the npm registry is unavailable
 */
export class RegistryUnavailableError extends SmartUpdateError {
  constructor(message: string = 'Failed to retrieve package information from npm registry') {
    super(message);
    this.name = 'RegistryUnavailableError';
  }
}

/**
 * Error thrown when a package is not found in the registry
 */
export class PackageNotFoundError extends SmartUpdateError {
  public readonly packageName: string;

  constructor(packageName: string) {
    super(`Package '${packageName}' not found in npm registry`);
    this.name = 'PackageNotFoundError';
    this.packageName = packageName;
  }
}

/**
 * Error thrown when a version string is invalid
 */
export class InvalidVersionError extends SmartUpdateError {
  public readonly version: string;

  constructor(version: string, reason?: string) {
    const message = reason
      ? `Invalid version string '${version}': ${reason}`
      : `Invalid version string '${version}'`;
    super(message);
    this.name = 'InvalidVersionError';
    this.version = version;
  }
}

/**
 * Error thrown when package name validation fails
 */
export class InvalidPackageNameError extends SmartUpdateError {
  public readonly packageName: string;

  constructor(packageName: string) {
    super(`Invalid package name '${packageName}'. Package names must follow npm naming conventions.`);
    this.name = 'InvalidPackageNameError';
    this.packageName = packageName;
  }
}