# FitAI Development Progress

## Current State

### ✅ Completed Features

#### 1. Project Structure
- Monorepo setup with separate admin and mobile apps
- Admin: Next.js 14 + TypeScript + Tailwind CSS
- Mobile: React Native + Expo + TypeScript
- Shared utilities and types package

#### 2. Authentication System
- **User Registration**: Mobile app registration form with validation
- **User Login**: Secure login with password hashing (bcryptjs)
- **Data Storage**: In-memory database (demo) with user and client schemas
- **Admin Access**: User management dashboard with role-based filtering

#### 3. API Endpoints
- `POST /api/auth/register` - User registration with client creation
- `POST /api/auth/login` - User authentication
- `GET /api/users` - User listing with role filtering
- All endpoints include proper error handling and validation

#### 4. Mobile App Features
- Registration screen with form validation
- Login screen with secure credential storage
- Authentication context with protected routes
- Tab navigation (Home, Profile, Attendance)
- User profile display with logout functionality

#### 5. Admin Dashboard Features
- User management interface
- Role-based filtering (All, Clients, Trainers, Admins)
- User cards showing membership details
- Responsive design with Tailwind CSS
- Real-time user data display

## Current User Flow

### Registration Flow
1. User opens mobile app → Registration screen
2. Fills form (email, password, name, phone)
3. Submits → API creates user + client record
4. Success → Redirect to login screen
5. User can login and access protected tabs

### Admin Management Flow
1. Admin opens dashboard → User management section
2. Views all users with role filtering
3. Sees user details: membership type, status, join date
4. Can filter by user role for easier management

## Technical Implementation

### Database Schema (In-Memory)
```typescript
User: {
  id, email, firstName, lastName, password, role, phone, createdAt
}
Client: {
  id, userId, membershipType, membershipStatus, joinDate, lastVisit
}
```

### Authentication
- Password hashing with bcryptjs
- JWT-like session storage in mobile (SecureStore)
- Protected routes with authentication context

### API Design
- RESTful endpoints with proper HTTP status codes
- Input validation and error handling
- TypeScript interfaces for type safety

## 🚧 Next Steps

### Phase 1: Core Features (Priority: High)

#### 1.1 Database Implementation
- [ ] Replace in-memory storage with persistent database
- [ ] Set up PostgreSQL or MongoDB with Drizzle ORM
- [ ] Create database migration scripts
- [ ] Add database connection pooling

#### 1.2 Enhanced User Management
- [ ] User CRUD operations (edit, delete, deactivate)
- [ ] Bulk user operations
- [ ] User search and pagination
- [ ] User activity logs

#### 1.3 Payment System
- [ ] Payment schema and API endpoints
- [ ] Payment status tracking
- [ ] Payment history for clients
- [ ] Automated payment reminders

#### 1.4 Attendance Tracking
- [ ] Check-in/check-out functionality
- [ ] QR code or NFC check-in
- [ ] Attendance analytics and reports
- [ ] Class scheduling integration

### Phase 2: Advanced Features (Priority: Medium)

#### 2.1 Notifications System
- [ ] Push notification setup
- [ ] Email notifications
- [ ] SMS notifications
- [ ] Notification preferences

#### 2.2 Enhanced Mobile Features
- [ ] Offline mode support
- [ ] Workout tracking
- [ ] Progress photos and measurements
- [ ] Goal setting and tracking

#### 2.3 Admin Analytics
- [ ] Dashboard metrics and KPIs
- [ ] Revenue tracking
- [ ] Member retention analytics
- [ ] Peak hours analysis

#### 2.4 Trainer Features
- [ ] Trainer-client assignment
- [ ] Workout plan creation
- [ ] Progress tracking tools
- [ ] Communication system

### Phase 3: AI Integration (Priority: Low)

#### 3.1 Fitness AI
- [ ] Workout recommendation engine
- [ ] Progress prediction algorithms
- [ ] Nutrition suggestions
- [ ] Injury risk assessment

#### 3.2 Business Intelligence
- [ ] Predictive analytics
- [ ] Churn prediction
- [ ] Revenue optimization
- [ ] Capacity planning

## Technical Debt & Improvements

### Immediate (Next Sprint)
- [ ] Add comprehensive error boundaries
- [ ] Implement proper logging system
- [ ] Add unit and integration tests
- [ ] Set up CI/CD pipeline
- [ ] Add input sanitization and security headers

### Medium Term
- [ ] Implement proper state management (Redux/Zustand)
- [ ] Add API rate limiting
- [ ] Implement caching strategy
- [ ] Add monitoring and alerting
- [ ] Performance optimization

### Long Term
- [ ] Microservices architecture
- [ ] Multi-tenant support
- [ ] Advanced security features
- [ ] Internationalization
- [ ] Progressive Web App (PWA)

## Development Guidelines

### Code Standards
- TypeScript for type safety
- ESLint + Prettier for code formatting
- Conventional commits for version control
- Feature branch development workflow

### Testing Strategy
- Unit tests for business logic
- Integration tests for API endpoints
- E2E tests for critical user flows
- Manual testing checklist for releases

### Deployment
- Staging environment for testing
- Blue-green deployment strategy
- Database migration scripts
- Rollback procedures

## Current Limitations

1. **Data Persistence**: Using in-memory storage (demo only)
2. **Security**: Basic authentication, no advanced security features
3. **Scalability**: Single-instance deployment
4. **Testing**: No automated tests implemented
5. **Monitoring**: No logging or monitoring setup
6. **Performance**: No optimization or caching

## Success Metrics

### Technical Metrics
- [ ] API response time < 200ms
- [ ] Mobile app load time < 3s
- [ ] 99.9% uptime
- [ ] Zero critical security vulnerabilities

### Business Metrics
- [ ] User registration conversion rate > 80%
- [ ] Admin task completion time < 2min
- [ ] User retention rate > 90%
- [ ] System adoption rate > 95%

---

**Last Updated**: November 7, 2025
**Version**: 1.0.0-alpha
**Next Review**: After Phase 1 completion