# Changelog

All notable changes to the Medication Reminder App will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [1.0.0] - 2025-09-05

### Added

- **Complete Authentication System**
  - Email/password authentication with bcrypt hashing
  - OAuth integration (Google, GitHub)
  - Email verification with Mailgun
  - Password reset functionality
  - Role-based access control (User, Admin)

- **Medication Management**
  - Add, edit, delete medications
  - Flexible scheduling (Daily, Multiple times, Custom intervals)
  - Visual medication cards with custom icons
  - Medication history tracking

- **Reminder System**
  - Smart scheduling based on medication frequency
  - Dose tracking (Taken, Missed, Upcoming)
  - Custom reminders with personalized messages
  - Adherence statistics and progress monitoring

- **Admin Interface**
  - Complete user management dashboard
  - View all users with status and role information
  - Suspend/activate user accounts
  - Delete users with protection mechanisms
  - Change user passwords
  - Role assignment capabilities

- **User Experience Features**
  - Responsive design for mobile and desktop
  - Dark/Light theme support
  - Intuitive interface with modern design
  - Onboarding flow for new users
  - Avatar customization with image upload
  - Settings management for preferences

- **Analytics Dashboard**
  - Daily adherence statistics with visual charts
  - Medication-specific analytics
  - Progress tracking over time
  - Export capabilities for healthcare providers

- **Infrastructure**
  - Docker containerization with multi-stage builds
  - CouchDB integration for data persistence
  - Environment-based service factory pattern
  - Production-ready nginx configuration
  - Comprehensive health checks

- **Security Features**
  - Secure password hashing with bcrypt
  - JWT-like token system for sessions
  - Email verification for account activation
  - Input validation and sanitization
  - Role-based authorization
  - Secure credential management

- **Development Tools**
  - TypeScript for type safety
  - ESLint for code quality
  - Automated setup and deployment scripts
  - Comprehensive test suite
  - Environment configuration management

- **Documentation**
  - Complete README with setup instructions
  - API documentation with examples
  - Security guide and best practices
  - Deployment guide for various platforms
  - Troubleshooting documentation

### Technical Details

- **Frontend**: React 19 with TypeScript, Vite build system
- **Backend**: CouchDB with localStorage fallback
- **Email**: Mailgun integration for verification and password reset
- **Deployment**: Docker Compose with nginx for production
- **Testing**: Jest integration tests for authentication flows
- **Package Management**: Bun for fast dependency management

### Database Schema

- Users collection with authentication and profile data
- Medications collection with scheduling information
- Settings collection for user preferences
- Taken doses collection for adherence tracking
- Reminders collection for custom user reminders

### Security Implementations

- Password requirements with strength validation
- Account status management (Pending, Active, Suspended)
- Email verification workflow
- Secure token generation for password reset
- Admin privilege separation
- Data privacy controls

### Performance Features

- Lazy loading for large datasets
- Optimized Docker images with multi-stage builds
- Static file serving with nginx
- Database indexing for efficient queries
- Responsive design for all screen sizes

## [Unreleased]

### Planned Features

- Mobile app development (React Native)
- Push notifications for reminders
- Integration with health APIs (Apple Health, Google Fit)
- Medication interaction checking
- Prescription refill reminders
- Healthcare provider portal
- Advanced analytics with machine learning
- Multi-language support
- Backup and restore functionality
- API rate limiting improvements

### Under Consideration

- Voice commands for medication logging
- Barcode scanning for medication identification
- Family account management
- Telemedicine integration
- Insurance information management
- Side effect tracking
- Mood and symptom correlation
- Wearable device integration

## Development Milestones

### Phase 1: Core Functionality ✅

- [x] Basic medication tracking
- [x] User authentication
- [x] Reminder system
- [x] Data persistence

### Phase 2: Enhanced Features ✅

- [x] Admin interface
- [x] Email integration
- [x] Analytics dashboard
- [x] Security hardening

### Phase 3: Production Ready ✅

- [x] Docker deployment
- [x] Environment management
- [x] Documentation
- [x] Testing suite

### Phase 4: Advanced Features (In Progress)

- [ ] Mobile application
- [ ] Advanced analytics
- [ ] Healthcare integrations
- [ ] Multi-tenant support

## Breaking Changes

### Version 1.0.0

- Initial release - no breaking changes from previous versions
- Migration from localStorage-only to production CouchDB
- Environment variable restructuring for security

## Migration Guide

### From Development to Production

1. Copy `.env.example` to `.env`
2. Configure CouchDB credentials
3. Set up Mailgun for email features
4. Run `./deploy.sh production`
5. Seed database with admin user

### Database Migration

- Automatic migration from localStorage to CouchDB
- Data import tools available for existing installations
- Backup and restore procedures documented

## Security Updates

### Version 1.0.0

- Implemented bcrypt password hashing
- Added JWT-like session management
- Configured secure email verification
- Established role-based access control
- Implemented input validation and sanitization

## Performance Improvements

### Version 1.0.0

- Optimized Docker build process
- Implemented lazy loading for large datasets
- Added database indexing for efficient queries
- Configured nginx for optimal static file serving
- Optimized React component rendering

## Bug Fixes

### Version 1.0.0

- Fixed authentication state management
- Resolved timezone handling in reminders
- Corrected medication scheduling edge cases
- Fixed mobile responsive design issues
- Resolved Docker environment variable handling

## Contributors

### Core Team

- Lead Developer - Full-stack development and architecture
- UI/UX Designer - Interface design and user experience
- DevOps Engineer - Infrastructure and deployment
- Security Specialist - Security audit and hardening

### Community Contributors

- Documentation improvements
- Bug reports and testing
- Feature suggestions and feedback
- Translation contributions

## Acknowledgments

### Open Source Libraries

- React team for the excellent frontend framework
- CouchDB team for the robust database system
- Mailgun for reliable email delivery services
- Docker team for containerization technology
- TypeScript team for enhanced development experience

### Inspiration

- Healthcare professionals providing feedback
- Patients sharing medication management challenges
- Open source community best practices
- Modern web development standards

## License

This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

## Release Notes

### Version 1.0.0 - "Foundation Release"

This inaugural release establishes the core foundation of the Medication Reminder App with enterprise-grade features and security. The application provides a complete medication management solution with professional-grade authentication, administration tools, and analytics capabilities.

**Key Highlights:**

- Production-ready Docker deployment
- Comprehensive user and admin interfaces
- Secure authentication with email verification
- Real-time medication tracking and analytics
- Mobile-responsive design
- Extensive documentation and security guides

**Who Should Upgrade:**

- All users moving from development to production
- Healthcare organizations requiring medication tracking
- Individuals seeking comprehensive medication management
- Developers needing a complete authentication reference

**Migration Path:**

- Follow the deployment guide for new installations
- Use the migration tools for existing data
- Review security guide for production deployment
- Test thoroughly in staging environment before production

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For technical support or questions about this release, please:

- Check the documentation in the `docs/` directory
- Open an issue on GitHub for bug reports
- Contact the development team for enterprise support
- Join our community Discord for general questions