import type { generateAuthURIOptions } from "./types/auth";
import { v4 as uuidv4 } from "uuid";

/** ユーザー認可によるトークン取得のURIを生成します。 */
export default function generateAuthURI(options: generateAuthURIOptions) {
  const session = options.session ?? uuidv4();
  const uri = new URL("/api/auth", options.origin);
  uri.searchParams.set("session", session);
  uri.searchParams.set("client", options.name);
  uri.searchParams.set("scope", options.scope.join(","));
  if (options.icon)
    uri.searchParams.set("icon", options.icon.toString());
  if (options.about)
    uri.searchParams.set("about", options.about);
  if (options.callback) {
    if (options.callback.insertSession)
      options.callback.url.searchParams.set(options.callback.insertSession, session);
    uri.searchParams.set("icon", options.callback.toString());
  }
  
  return {
    /** 生成されたURI */
    uri: uri,
    /** session */
    session: session,
  };
}