import type { Entitlements, Plan } from './plans';
import type { NowPlayingProvider, StreamingService } from './services';

export interface TrackDTO {
  id: string;
  title: string;
  artist: string;
  album: string | null;
  artworkUrl: string | null;
  durationMs: number | null;
  isrc: string | null;
  links: Partial<Record<StreamingService, string>>;
}

export interface UserSummaryDTO {
  id: string;
  username: string;
  displayName: string | null;
  avatarUrl: string | null;
}

export interface MeDTO extends UserSummaryDTO {
  email: string;
  bio: string | null;
  preferredService: StreamingService | null;
  plan: Plan;
  entitlements: Entitlements;
}

export interface NowPlayingDTO {
  user: UserSummaryDTO;
  track: TrackDTO;
  isPlaying: boolean;
  source: NowPlayingProvider;
  progressMs: number | null;
  updatedAt: string;
}

/** A feed entry. pinnedAt is set when the viewer pinned this friend. */
export interface FeedItemDTO extends NowPlayingDTO {
  pinnedAt: string | null;
}

/** Pinned first (oldest pin on top, so order is stable), then live listeners, then most recent. */
export function sortFeed<T extends FeedItemDTO>(items: T[]): T[] {
  return [...items].sort(
    (a, b) =>
      Number(Boolean(b.pinnedAt)) - Number(Boolean(a.pinnedAt)) ||
      (a.pinnedAt && b.pinnedAt ? a.pinnedAt.localeCompare(b.pinnedAt) : 0) ||
      Number(b.isPlaying) - Number(a.isPlaying) ||
      b.updatedAt.localeCompare(a.updatedAt),
  );
}

export interface FeaturedSongDTO {
  track: TrackDTO;
  comment: string | null;
  updatedAt: string;
}

export interface RecentPlayDTO {
  track: TrackDTO;
  source: NowPlayingProvider;
  playedAt: string;
}

export interface ProfileDTO {
  user: UserSummaryDTO & { bio: string | null };
  followerCount: number;
  followingCount: number;
  isFollowing: boolean;
  isPinned: boolean;
  isSelf: boolean;
  featured: FeaturedSongDTO | null;
  nowPlaying: NowPlayingDTO | null;
  /** Most recent first, not including the track playing right now. */
  recent: RecentPlayDTO[];
}

export interface ConnectionDTO {
  provider: NowPlayingProvider;
  externalUserId: string;
  displayName: string | null;
  status: 'active' | 'error';
  lastError: string | null;
  lastPolledAt: string | null;
  /** Secret URL the user can paste into Plex/Jellyfin for instant updates. */
  webhookUrl: string | null;
}

export interface TrackSearchResultDTO {
  deezerId: string;
  title: string;
  artist: string;
  album: string | null;
  artworkUrl: string | null;
  durationMs: number | null;
}

/** Messages pushed over the realtime websocket. */
export type RealtimeMessage = { type: 'now_playing'; data: NowPlayingDTO };