export type VideoCanvasStoryboardReferenceRequest = {
  activation?: "locate" | "preview";
  contentType?: string;
  mediaType?: "audio" | "image" | "text" | "video";
  mediaUrl?: string;
  nodeId: string;
  requestId: string;
  textContent?: string;
  title: string;
  previewUrl?: string;
};

export function normalizeVideoCanvasStoryboardReference(
  value: VideoCanvasStoryboardReferenceRequest,
): VideoCanvasStoryboardReferenceRequest | null {
  const mediaUrl = String(value.mediaUrl || "").trim();
  const nodeId = String(value.nodeId || "").trim();
  const requestId = String(value.requestId || "").trim();
  const textContent = String(value.textContent || "").trim();
  const title = String(value.title || "").trim();
  const previewUrl = String(value.previewUrl || "").trim();
  if (!(nodeId && requestId && title)) return null;

  const isTextReference =
    value.mediaType === "text" ||
    String(value.contentType || "").trim().toLowerCase().startsWith("text/");
  if (isTextReference) {
    if (!textContent) return null;
    return {
      activation: "locate",
      contentType: "text/plain",
      mediaType: "text",
      mediaUrl: "",
      nodeId,
      requestId,
      textContent,
      title,
    };
  }

  const activation =
    value.activation === "locate" ||
    value.mediaType === "audio" ||
    value.mediaType === "video" ||
    String(value.contentType || "").trim().toLowerCase().startsWith("audio/")
      ? "locate"
      : "preview";
  const isVideoReference =
    value.mediaType === "video" ||
    String(value.contentType || "").trim().toLowerCase().startsWith("video/");
  if (
    !mediaUrl &&
    !(activation === "locate" && (textContent || isVideoReference))
  ) {
    return null;
  }

  for (const candidateUrl of [mediaUrl, previewUrl].filter(Boolean)) {
    try {
      const parsedUrl = new URL(candidateUrl);
      if (parsedUrl.protocol !== "http:" && parsedUrl.protocol !== "https:") {
        return null;
      }
    } catch {
      return null;
    }
  }

  const contentType = String(
    value.contentType || (isVideoReference ? "video/mp4" : "image/jpeg"),
  ).trim();
  const mediaType =
    isVideoReference
      ? "video"
      : value.mediaType === "audio" || contentType.startsWith("audio/")
        ? "audio"
        : "image";

  return {
    activation,
    contentType,
    mediaType,
    mediaUrl,
    nodeId,
    requestId,
    ...(textContent ? { textContent } : {}),
    title,
    ...(previewUrl ? { previewUrl } : {}),
  };
}