import { StoryConfig } from "./config";

export interface ValidationResult {
  is_public_domain: boolean;
  message: string;
}

export function validatePublicDomain(storyConfig: StoryConfig): ValidationResult {
  const publicationYear = storyConfig.metadata.publication_year;
  if (!publicationYear) {
    return {
      is_public_domain: false,
      message: "Publication year not found in metadata.",
    };
  }

  const currentYear = new Date().getFullYear();
  const cutoffYear = currentYear - 95;

  if (publicationYear > cutoffYear) {
    return {
      is_public_domain: false,
      message: `Work published in ${publicationYear} is not yet in the US public domain (cutoff: ≤ ${cutoffYear}).`,
    };
  }

  return {
    is_public_domain: true,
    message: "Work is in the public domain in the US (95-year rule).",
  };
}