export type CaptionSegment =
  | { type: "text"; text: string }
  | { type: "hashtag"; tag: string }
  | { type: "mention"; name: string };

export function parseCaption(caption: string): CaptionSegment[] {
  const segments: CaptionSegment[] = [];
  const parts = caption.split(/(#\w{1,50}|@\w{1,50})/g);
  for (const part of parts) {
    if (part.startsWith("#")) {
      segments.push({ type: "hashtag", tag: part.slice(1).toLowerCase() });
    } else if (part.startsWith("@")) {
      segments.push({ type: "mention", name: part.slice(1) });
    } else if (part) {
      segments.push({ type: "text", text: part });
    }
  }
  return segments;
}