export class PortalMailTemplateError extends Error {
  constructor(
    readonly templateName: string,
    cause: unknown,
  ) {
    super(`Mail template rendering failed for "${templateName}": ${errorMessage(cause)}`);
    this.name = 'PortalMailTemplateError';
    this.cause = cause;
  }
}

export class PortalMailDeliveryError extends Error {
  constructor(
    readonly templateName: string,
    cause: unknown,
  ) {
    super(`Mail delivery failed for "${templateName}": ${errorMessage(cause)}`);
    this.name = 'PortalMailDeliveryError';
    this.cause = cause;
  }
}

function errorMessage(error: unknown): string {
  return error instanceof Error ? error.message : 'unknown error';
}