import { createContext } from "react";
import type {
  Comment,
  Dump,
  Notification,
  OnlineUser,
  Playlist,
  PublicUser,
} from "../model.ts";

export interface VoteEvent {
  dumpId: string;
  voterId: string;
  action: "cast" | "remove";
}

export interface LikeEvent {
  commentId: string;
  likerId: string;
  action: "cast" | "remove";
}

export interface PlaylistEvent {
  type: "created" | "updated" | "deleted" | "dumps_updated";
  playlistId: string;
  playlist?: Playlist;
  userId?: string;
  dumpIds?: string[];
}

export interface CommentEvent {
  type: "created" | "deleted" | "updated";
  dumpId: string;
  comment?: Comment;
  commentId?: string;
}

export interface UserEvent {
  user: PublicUser;
}

export interface WSContextValue {
  wsStatus: "connecting" | "connected" | "disconnected";
  wsErrorMessage: string | null;
  onlineUsers: OnlineUser[];
  voteCounts: Record<string, number>;
  myVotes: Set<string>;
  likeCounts: Record<string, number>;
  myLikes: Set<string>;
  recentDumps: Dump[];
  deletedDumpIds: Set<string>;
  lastVoteEvent: VoteEvent | null;
  lastLikeEvent: LikeEvent | null;
  lastDumpEvent: Dump | null;
  lastPlaylistEvent: PlaylistEvent | null;
  deletedPlaylistIds: Set<string>;
  lastCommentEvent: CommentEvent | null;
  lastUserEvent: UserEvent | null;
  unreadNotificationCount: number;
  lastNotification: Notification | null;
  /** Increments on each WS reconnect so pages can backfill missed events. */
  connectionEpoch: number;
  castVote: (dumpId: string) => void;
  removeVote: (dumpId: string) => void;
  castCommentLike: (commentId: string) => void;
  removeCommentLike: (commentId: string) => void;
  injectDump: (dump: Dump) => void;
  clearUnreadNotifications: () => void;
}

export const WSContext = createContext<WSContextValue>({
  wsStatus: "connecting",
  wsErrorMessage: null,
  onlineUsers: [],
  voteCounts: {},
  myVotes: new Set(),
  likeCounts: {},
  myLikes: new Set(),
  recentDumps: [],
  deletedDumpIds: new Set(),
  lastVoteEvent: null,
  lastLikeEvent: null,
  lastDumpEvent: null,
  lastPlaylistEvent: null,
  deletedPlaylistIds: new Set(),
  lastCommentEvent: null,
  lastUserEvent: null,
  unreadNotificationCount: 0,
  lastNotification: null,
  connectionEpoch: 0,
  castVote: () => {},
  removeVote: () => {},
  castCommentLike: () => {},
  removeCommentLike: () => {},
  injectDump: () => {},
  clearUnreadNotifications: () => {},
});