// ═══════════════════════════════════════════════════════════════════════════
// TYPES - Education Platform for HuggingFace Spaces
// ═══════════════════════════════════════════════════════════════════════════

// Session Types
export interface Session {
  id: string;
  name: string;
  teacherId: string;
  teacherName: string;
  createdAt: string;
  isActive: boolean;
  currentSlide: number;
  totalSlides: number;
  slideUrls: string[];
  whiteboardData: WhiteboardStroke[];
  studentCount: number;
  maxStudents: number;
}

// User Types
export interface User {
  id: string;
  name: string;
  role: 'teacher' | 'student';
  sessionId?: string;
  joinedAt: string;
}

// Chat Types
export interface ChatMessage {
  id: string;
  sessionId: string;
  userId: string;
  userName: string;
  message: string;
  isTeacher: boolean;
  timestamp: string;
}

// Poll Types
export interface Poll {
  id: string;
  sessionId: string;
  question: string;
  options: PollOption[];
  correctAnswer?: string;
  duration: number;
  createdAt: string;
  endsAt: string;
  isActive: boolean;
  results: Record<string, number>;
  totalVotes: number;
  votedStudents: string[];
}

export interface PollOption {
  id: string;
  text: string;
  isCorrect?: boolean;
}

// Doubt Types
export interface Doubt {
  id: string;
  sessionId: string;
  studentId: string;
  studentName: string;
  question: string;
  image?: string;
  slideNumber: number;
  status: 'pending' | 'in_progress' | 'solved';
  createdAt: string;
  solvedAt?: string;
  annotatedImage?: string;
  teacherResponse?: string;
}

// Reaction Types
export interface Reaction {
  sessionId: string;
  emoji: string;
  count: number;
  lastUpdated: string;
}

export type ReactionType = '👍' | '❤️' | '🎉' | '😕' | '🚀' | '👏' | '🔥';

// Whiteboard Types
export interface WhiteboardStroke {
  id: string;
  tool: 'pen' | 'eraser' | 'highlighter' | 'text' | 'arrow' | 'circle' | 'rectangle';
  color: string;
  lineWidth: number;
  points: Point[];
  text?: string;
  slideNumber: number;
  timestamp: string;
}

export interface Point {
  x: number;
  y: number;
}

// Slide Types
export interface Slide {
  id: string;
  sessionId: string;
  slideNumber: number;
  imageUrl: string;
  annotations: WhiteboardStroke[];
  createdAt: string;
}

// SSE Event Types
export type SSEEventType =
  | 'connected'
  | 'slide_change'
  | 'whiteboard_draw'
  | 'whiteboard_clear'
  | 'new_poll'
  | 'poll_update'
  | 'poll_ended'
  | 'chat_message'
  | 'reaction'
  | 'new_doubt'
  | 'doubt_update'
  | 'doubt_solved'
  | 'student_joined'
  | 'student_left'
  | 'session_ended'
  | 'presence_update';

export interface SSEEvent {
  id: string;
  event: SSEEventType;
  data: any;
  timestamp: string;
}

// Storage Types (HuggingFace CDN)
export interface StorageFile {
  path: string;
  url: string;
  size: number;
  contentType: string;
  uploadedAt: string;
}

export interface SessionStorage {
  sessionId: string;
  slides: StorageFile[];
  whiteboardSnapshots: StorageFile[];
  doubts: StorageFile[];
  chatHistory: ChatMessage[];
  pollHistory: Poll[];
}

// API Request/Response Types
export interface ApiResponse<T = any> {
  success: boolean;
  data?: T;
  error?: string;
  message?: string;
}

// Presence Types
export interface PresenceUser {
  id: string;
  name: string;
  role: 'teacher' | 'student';
  lastSeen: string;
  isOnline: boolean;
}

export interface PresenceUpdate {
  sessionId: string;
  onlineCount: number;
  users: PresenceUser[];
}