// Per-scope homepage feed. Each national scope with a `feed` in scopes.ts has its own custom feed
// generator in gui.do's account (community members plus the wider atproto conversation for that
// country, off-topic noise filtered out); the .eu aggregate has the pan-European feed. Which rkey
// belongs to which country is a per-country knob in src/config/scopes.ts (`feed.rkey`); this module
// only turns that rkey into the AppView URI + the mu.social subscribe deeplink.
import type { Scope } from '../config/scopes';

const FEED_DID = 'did:plc:45uheisi25szrjvjurfpritx'; // gui.do (the feed generators live in this account)

export interface HomeFeed {
  uri: string;
  subscribe: string;
}

/** The homepage feed for a scope, or null when it has none (no `feed` set in scopes.ts). */
export function feedForScope(scope: Scope): HomeFeed | null {
  if (!scope.feed) return null;
  const { rkey } = scope.feed;
  return {
    uri: `at://${FEED_DID}/app.bsky.feed.generator/${rkey}`,
    // Subscribe deeplink on mu.social (same path shape as bsky.app: /profile/<handle>/feed/<rkey>).
    subscribe: `https://mu.social/profile/gui.do/feed/${rkey}`,
  };
}