/**
 * configures oauth and provides getAuth to retrive the auth for the user
 */
import { Client } from "@atcute/client";
import { getSession, OAuthUserAgent } from "@atcute/oauth-browser-client";
import { configureOAuth } from "@atcute/oauth-browser-client";
import {
  CompositeDidDocumentResolver,
  LocalActorResolver,
  PlcDidDocumentResolver,
  WebDidDocumentResolver,
  XrpcHandleResolver,
} from "@atcute/identity-resolver";

import metadata from "../oauth-client-metadata.json" with { type: "json" };

configureOAuth({
  metadata: import.meta.env.PROD
    ? {
        client_id: metadata.client_id,
        redirect_uri: metadata.redirect_uris[0],
      }
    : {
        client_id:
          "https://cimd.vielle.dev/oauth-client-metadata.json?" +
          new URLSearchParams({
            scopes: metadata.scope,
            callback: "/atproto/callback",
          }),
        redirect_uri: "https://cimd.vielle.dev/atproto/callback",
      },
  identityResolver: new LocalActorResolver({
    handleResolver: new XrpcHandleResolver({
      serviceUrl: "https://public.api.bsky.app",
    }),
    didDocumentResolver: new CompositeDidDocumentResolver({
      methods: {
        plc: new PlcDidDocumentResolver(),
        web: new WebDidDocumentResolver(),
      },
    }),
  }),
});

// overrides
export async function getAuth(
  forceAuth: true,
): Promise<[Client, OAuthUserAgent, `did:${string}:${string}`]>;
export async function getAuth(
  forceAuth?: false,
): Promise<
  | [Client, OAuthUserAgent, `did:${string}:${string}`]
  | [undefined, undefined, undefined]
>;
// main impl
export async function getAuth(
  forceAuth?: boolean,
): Promise<
  | [Client, OAuthUserAgent, `did:${string}:${string}`]
  | [undefined, undefined, undefined]
> {
  const did = localStorage.getItem("did");
  try {
    if (did && did.match(/^did:.+:.*$/)) {
      const session = await getSession(did as `did:${string}:${string}`, {});
      const agent = new OAuthUserAgent(session);
      const client = new Client({ handler: agent });
      return [client, agent, did as `did:${string}:${string}`];
    } else {
      if (forceAuth) {
        location.assign("/atproto/login");
        return undefined as never;
      } else return [undefined, undefined, undefined];
    }
  } catch (e) {
    console.warn(e);
    if (forceAuth) {
      location.assign("/atproto/login");
      return undefined as never;
    } else return [undefined, undefined, undefined];
  }
}