// Created by: Claude
// Date: 2026-01-03
// Purpose: Store Zustand pour la gestion des rooms et messages
// Refs: client/CLAUDE.md

import { create } from 'zustand'

/**
 * Message dans une room.
 */
export interface Message {
  message_id: string
  room_id: string
  user_id: string
  from_username: string
  content: string
  created_at: string
}

/**
 * Membre d'une room.
 */
export interface RoomMember {
  user_id: string
  username: string
  peer_id?: string
  role: 'owner' | 'member' | 'guest'
  presence: 'online' | 'busy' | 'offline'
}

/**
 * Informations sur une room.
 */
export interface RoomInfo {
  room_id: string
  name: string
  owner_user_id: string
  created_at: string
  members: RoomMember[]
  messages: Message[]
}

/**
 * État de la room courante.
 */
interface RoomState {
  // Room courante
  currentRoomId: string | null
  currentRoom: RoomInfo | null

  // Cache des rooms
  rooms: Map<string, RoomInfo>

  // Actions - Room courante
  setCurrentRoom: (roomId: string, roomInfo: Partial<RoomInfo>) => void
  clearCurrentRoom: () => void

  // Actions - Messages
  addMessage: (roomId: string, message: Message) => void
  setMessages: (roomId: string, messages: Message[]) => void

  // Actions - Membres
  addMember: (roomId: string, member: RoomMember) => void
  removeMember: (roomId: string, userId: string) => void
  updateMemberPresence: (roomId: string, userId: string, presence: 'online' | 'busy' | 'offline') => void
  setMembers: (roomId: string, members: RoomMember[]) => void

  // Actions - Cache
  updateRoomCache: (roomId: string, updates: Partial<RoomInfo>) => void
  clearCache: () => void
}

/**
 * Store pour la gestion des rooms et messages.
 */
export const useRoomStore = create<RoomState>((set, get) => ({
  // État initial
  currentRoomId: null,
  currentRoom: null,
  rooms: new Map(),

  // Définir la room courante
  setCurrentRoom: (roomId, roomInfo) => {
    const existingRoom = get().rooms.get(roomId)

    const room: RoomInfo = {
      room_id: roomId,
      name: roomInfo.name || existingRoom?.name || 'Unknown Room',
      owner_user_id: roomInfo.owner_user_id || existingRoom?.owner_user_id || '',
      created_at: roomInfo.created_at || existingRoom?.created_at || new Date().toISOString(),
      members: roomInfo.members || existingRoom?.members || [],
      messages: roomInfo.messages || existingRoom?.messages || [],
    }

    set((state) => {
      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, room)

      return {
        currentRoomId: roomId,
        currentRoom: room,
        rooms: newRooms,
      }
    })
  },

  // Effacer la room courante
  clearCurrentRoom: () => set({
    currentRoomId: null,
    currentRoom: null,
  }),

  // Ajouter un message
  addMessage: (roomId, message) => {
    set((state) => {
      const room = state.rooms.get(roomId)
      if (!room) return state

      const updatedRoom = {
        ...room,
        messages: [...room.messages, message],
      }

      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, updatedRoom)

      return {
        rooms: newRooms,
        currentRoom: state.currentRoomId === roomId ? updatedRoom : state.currentRoom,
      }
    })
  },

  // Définir tous les messages d'une room
  setMessages: (roomId, messages) => {
    set((state) => {
      const room = state.rooms.get(roomId)
      if (!room) return state

      const updatedRoom = {
        ...room,
        messages,
      }

      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, updatedRoom)

      return {
        rooms: newRooms,
        currentRoom: state.currentRoomId === roomId ? updatedRoom : state.currentRoom,
      }
    })
  },

  // Ajouter un membre
  addMember: (roomId, member) => {
    set((state) => {
      const room = state.rooms.get(roomId)
      if (!room) return state

      // Vérifier si le membre existe déjà
      const existingIndex = room.members.findIndex((m) => m.user_id === member.user_id)

      let updatedMembers
      if (existingIndex >= 0) {
        // Mettre à jour le membre existant
        updatedMembers = [...room.members]
        updatedMembers[existingIndex] = { ...updatedMembers[existingIndex], ...member }
      } else {
        // Ajouter un nouveau membre
        updatedMembers = [...room.members, member]
      }

      const updatedRoom = {
        ...room,
        members: updatedMembers,
      }

      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, updatedRoom)

      return {
        rooms: newRooms,
        currentRoom: state.currentRoomId === roomId ? updatedRoom : state.currentRoom,
      }
    })
  },

  // Retirer un membre
  removeMember: (roomId, userId) => {
    set((state) => {
      const room = state.rooms.get(roomId)
      if (!room) return state

      const updatedRoom = {
        ...room,
        members: room.members.filter((m) => m.user_id !== userId),
      }

      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, updatedRoom)

      return {
        rooms: newRooms,
        currentRoom: state.currentRoomId === roomId ? updatedRoom : state.currentRoom,
      }
    })
  },

  // Mettre à jour la présence d'un membre
  updateMemberPresence: (roomId, userId, presence) => {
    set((state) => {
      const room = state.rooms.get(roomId)
      if (!room) return state

      const updatedMembers = room.members.map((m) =>
        m.user_id === userId ? { ...m, presence } : m
      )

      const updatedRoom = {
        ...room,
        members: updatedMembers,
      }

      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, updatedRoom)

      return {
        rooms: newRooms,
        currentRoom: state.currentRoomId === roomId ? updatedRoom : state.currentRoom,
      }
    })
  },

  // Définir tous les membres
  setMembers: (roomId, members) => {
    set((state) => {
      const room = state.rooms.get(roomId)
      if (!room) return state

      const updatedRoom = {
        ...room,
        members,
      }

      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, updatedRoom)

      return {
        rooms: newRooms,
        currentRoom: state.currentRoomId === roomId ? updatedRoom : state.currentRoom,
      }
    })
  },

  // Mettre à jour le cache d'une room
  updateRoomCache: (roomId, updates) => {
    set((state) => {
      const room = state.rooms.get(roomId)
      if (!room) return state

      const updatedRoom = {
        ...room,
        ...updates,
      }

      const newRooms = new Map(state.rooms)
      newRooms.set(roomId, updatedRoom)

      return {
        rooms: newRooms,
        currentRoom: state.currentRoomId === roomId ? updatedRoom : state.currentRoom,
      }
    })
  },

  // Vider le cache
  clearCache: () => set({
    currentRoomId: null,
    currentRoom: null,
    rooms: new Map(),
  }),
}))