import { Film, Folder, Globe, Server, Upload, type LucideIcon } from "lucide-react";
import { YouTubeIcon } from "../lib/brandIcons";
import type { FileFolder } from "../lib/api";

// A library folder's and a file's origin, named and drawn. The backend sends a source folder's KEY
// (`youtube`, `plex`, `upload`, `site:<host>`, see backend downloads/folders.py) and leaves
// its name to the client, in the reader's language; an own folder carries the name its user gave it;
// the Hub folder (one per user, made by a hub token) is named by the client too.

const SITE_PREFIX = "site:";

type T = (key: string) => string;

/** The name of a source: a site is its host, the rest are words of the UI. */
export function sourceLabel(key: string, t: T): string {
  if (key.startsWith(SITE_PREFIX)) return key.slice(SITE_PREFIX.length);
  if (key === "youtube" || key === "plex" || key === "upload") return t(`files.source.${key}`);
  return key;
}

export function sourceIcon(key: string): LucideIcon | typeof YouTubeIcon {
  if (key === "youtube") return YouTubeIcon;
  if (key === "plex") return Film;
  if (key === "upload") return Upload;
  return Globe;
}

type Folderish = Pick<FileFolder, "kind" | "source_key" | "name">;

export function folderLabel(folder: Folderish, t: T): string {
  if (folder.kind === "hub") return t("files.folder.hub");
  return folder.kind === "own" ? (folder.name ?? "") : sourceLabel(folder.source_key ?? "", t);
}

export function folderIcon(folder: Folderish): LucideIcon | typeof YouTubeIcon {
  if (folder.kind === "hub") return Server;
  return folder.kind === "own" ? Folder : sourceIcon(folder.source_key ?? "");
}

/** Whether an upload may land in `folder` (the backend's `folders.upload_target`): an own folder,
 *  the Hub folder, or Uploads — a file put in a site's folder would claim an origin it does not have. */
export function takesUploads(folder: Folderish): boolean {
  return folder.kind !== "source" || folder.source_key === "upload";
}