import type { MediaFile } from "@/domain/work-orders/types/work-order-media";

const COMPLETION_PURPOSES = new Set(["Before", "After", "Completion"]);

export type MediaSurfaceOwnership = {
  completionOwnedIds: ReadonlySet<string>;
  extraOwnedIds: ReadonlySet<string>;
};

const EMPTY_OWNERSHIP: MediaSurfaceOwnership = {
  completionOwnedIds: new Set(),
  extraOwnedIds: new Set(),
};

/** Only Reactive and Emergency work orders render a media gallery on the Completion tab. */
export function hasCompletionMediaGallery(type: string | null | undefined): boolean {
  return type === "Emergency" || type === "Reactive";
}

function isPhotoOrVideo(item: MediaFile): boolean {
  return item.fileType === "image" || item.fileType === "video";
}

function isInFlight(item: MediaFile): boolean {
  return item.uploadStatus === "uploading" || item.uploadStatus === "failed";
}

/** Extra photo/video from Completion Doc POST (no category) until Extra is chosen. */
export function isCompletionSurfaceMedia(
  item: MediaFile,
  ownership: MediaSurfaceOwnership = EMPTY_OWNERSHIP,
  completionHasGallery = true,
): boolean {
  if (isInFlight(item)) return true;
  if (COMPLETION_PURPOSES.has(item.purpose ?? "")) return true;
  if (!completionHasGallery && item.purpose === "Extra") return false;
  if (ownership.completionOwnedIds.has(item.id)) return true;
  if (ownership.extraOwnedIds.has(item.id)) return false;
  return item.purpose === "Extra" && isPhotoOrVideo(item);
}

/** Without a Completion gallery, every Extra item (including photos/videos) belongs to Extras. */
export function isExtrasSurfaceMedia(
  item: MediaFile,
  ownership: MediaSurfaceOwnership = EMPTY_OWNERSHIP,
  completionHasGallery = true,
): boolean {
  if (item.purpose === "Aveta") return true;
  if (item.purpose !== "Extra") return false;
  if (!completionHasGallery) return true;
  if (ownership.completionOwnedIds.has(item.id)) return false;
  if (ownership.extraOwnedIds.has(item.id)) return true;
  return !isPhotoOrVideo(item);
}