export type ResolvedChrome = {
  header: boolean;
  sidebar: boolean;
  toc: boolean;
  footer: boolean;
};

/**
 * Resolve docs `chrome` frontmatter flags. Omitted keys default to true so the
 * full shell renders unless explicitly disabled.
 */
export function resolveChrome(frontmatter: Record<string, unknown>): ResolvedChrome {
  const raw = frontmatter.chrome;
  const obj =
    raw && typeof raw === "object" && !Array.isArray(raw) ? (raw as Record<string, unknown>) : {};
  const flag = (key: string, defaultOn: boolean): boolean => {
    if (!(key in obj)) return defaultOn;
    const v = obj[key];
    return typeof v === "boolean" ? v : defaultOn;
  };

  return {
    header: flag("header", true),
    sidebar: flag("sidebar", true),
    toc: flag("toc", true),
    footer: flag("footer", true),
  };
}