// Events Socket.IO typés, partagés par le serveur et le client.
// Convention : `CLIENT → SERVER` et `SERVER → CLIENT`. Tout timestamp est serveur.

import type {
  Answer,
  BlindtestMode,
  GameType,
  MixMode,
  PlayerScore,
  RoomSnapshot,
  RoundConfig,
  RoundRecap,
  RoundType,
} from "./domain"
import type { BlindtestTrackInfo } from "./blindtest"

// --- Payloads ------------------------------------------------------------

export interface RoomCreatePayload {
  playerName?: string
}

export interface RoomCreatedPayload {
  roomCode: string
  playerId: string
  /** Jeton secret pour se reconnecter après un refresh/coupure. */
  token: string
}

export interface RejoinPayload {
  roomCode: string
  playerId: string
  token: string
}

export interface RoomJoinPayload {
  roomCode: string
  playerName?: string
}

export interface SetNamePayload {
  name: string
}

export interface UpdateSettingsPayload {
  gameType: GameType
  mixedModes: MixMode[]
  blindtestMode: BlindtestMode
  roundDuration: number
  tracksPerPlayer: number
  categories: string[]
  rounds: RoundConfig[]
}

export interface PlayerRefPayload {
  playerId: string
}

export interface SubmitTrackPayload {
  youtubeUrl: string
}

export interface SubmitOkPayload {
  accepted: boolean
  reason?: string
  /** Id du titre créé (pour pouvoir le supprimer). */
  trackId?: string
  youtubeId?: string
  /** Titre récupéré (oEmbed) si accepté — pour confirmation côté client. */
  title?: string
  /** Nombre total de titres soumis par ce joueur après cet ajout. */
  count?: number
}

export interface RemoveTrackPayload {
  trackId: string
}

export interface RoundStartPayload {
  type: RoundType
  djId?: string
  /** Timestamp serveur de début des réponses (après le délai de préparation / transition). */
  startsAt: number
  /** Timestamp serveur de fin de manche (startsAt + roundDuration). */
  endsAt: number
  /** Envoyé uniquement au contributeur du titre (blindtest) : "c'est le tien". */
  mine?: boolean
  /** Payload spécifique au type d'épreuve, SANS la réponse. */
  payload: unknown
}

export type MediaAction = "play" | "pause" | "seek"

/** Contrôle média émis par le DJ uniquement. */
export interface MediaControlPayload {
  action: MediaAction
  positionSec: number
}

/** Diffusion de recalage à tous les clients. */
export interface MediaSyncPayload {
  action: MediaAction
  positionSec: number
  atServerTs: number
}

export interface VotePayload {
  answer: Answer
}

/** Progression des votes. `voted` = playerIds ayant validé (jamais leur réponse). */
export interface VoteAckPayload {
  count: number
  total: number
  voted: string[]
}

export interface RevealPayload {
  truth: unknown
  perPlayerResult: unknown
}

export interface ScoreUpdatePayload {
  scores: PlayerScore[]
}

export interface GameEndPayload {
  finalScores: PlayerScore[]
  /** Titres joués (si la partie comportait du blindtest) — pour récupérer les liens. */
  tracks?: BlindtestTrackInfo[]
  /** Récapitulatif de toutes les manches (question + réponse + qui a marqué). */
  recap?: RoundRecap[]
  spotifyExport?: unknown
}

export interface ErrorPayload {
  code: string
  message: string
}

// --- Maps d'events Socket.IO ---------------------------------------------

/** Ack standard renvoyé par le serveur sur les commandes critiques. */
export type Ack<T> = (result: { ok: true; data: T } | { ok: false; error: ErrorPayload }) => void

/** CLIENT → SERVER */
export interface ClientToServerEvents {
  "room:create": (payload: RoomCreatePayload, ack: Ack<RoomCreatedPayload>) => void
  "room:join": (payload: RoomJoinPayload, ack: Ack<RoomCreatedPayload>) => void
  "room:rejoin": (payload: RejoinPayload, ack: Ack<RoomCreatedPayload>) => void
  "player:setName": (payload: SetNamePayload) => void
  "lobby:updateSettings": (payload: UpdateSettingsPayload) => void
  "lobby:return": () => void
  "game:start": (ack: Ack<null>) => void
  "blindtest:submitTrack": (
    payload: SubmitTrackPayload,
    ack: (res: SubmitOkPayload) => void
  ) => void
  "blindtest:removeTrack": (
    payload: RemoveTrackPayload,
    ack: (res: { ok: boolean }) => void
  ) => void
  "media:control": (payload: MediaControlPayload) => void
  "round:vote": (payload: VotePayload) => void
}

/** SERVER → CLIENT */
export interface ServerToClientEvents {
  "room:state": (payload: RoomSnapshot) => void
  "player:left": (payload: PlayerRefPayload) => void
  "player:rejoined": (payload: PlayerRefPayload) => void
  "blindtest:submitOk": (payload: SubmitOkPayload) => void
  "round:start": (payload: RoundStartPayload) => void
  "media:sync": (payload: MediaSyncPayload) => void
  "round:voteAck": (payload: VoteAckPayload) => void
  "round:reveal": (payload: RevealPayload) => void
  "score:update": (payload: ScoreUpdatePayload) => void
  "game:end": (payload: GameEndPayload) => void
  "error": (payload: ErrorPayload) => void
}

/** Events serveur ↔ serveur (inutilisés en V1, pas de Redis adapter). */
export type InterServerEvents = Record<string, never>

/** Données attachées à chaque socket côté serveur. */
export interface SocketData {
  playerId?: string
  roomCode?: string
}