# App Development Roadmap

## Current Application Assessment

This is a solid Next.js-based project management system for construction/engineering projects with the following existing features:

### ✅ Currently Implemented

- **Project Management**: CRUD operations for projects with detailed information
- **Contract Management**: Contract creation, linking to projects, status tracking
- **Task Management**: Template-based and custom tasks with status tracking
- **Dashboard**: Statistics overview, recent projects, quick actions
- **Map Integration**: Leaflet maps with multiple layer support (OpenStreetMap, Polish Geoportal)
- **Database**: SQLite with better-sqlite3, well-structured schema
- **UI/UX**: Modern Tailwind CSS interface with responsive design
- **API Structure**: RESTful API endpoints for all entities
- **Docker Support**: Containerized development and deployment
- **Testing Setup**: Jest, Playwright, Testing Library configured

---

## Critical Missing Features for App

### 🔐 **1. Authentication & Authorization (HIGH PRIORITY)**

**Current State**: No authentication system
**Required**:

- User login/logout system
- Role-based access control (Admin, Project Manager, User, Read-only)
- Session management
- Password reset functionality
- User management interface
- API route protection

**Implementation Options**:

- NextAuth.js with database sessions
- Auth0 integration
- Custom JWT implementation

### 🔒 **2. Security & Data Protection (HIGH PRIORITY)**

**Current State**: No security measures
**Required**:

- Input validation and sanitization
- SQL injection protection (prepared statements are good start)
- XSS protection
- CSRF protection
- Rate limiting
- Environment variable security
- Data encryption for sensitive fields
- Audit logging

### 📊 **3. Advanced Reporting & Analytics (MEDIUM PRIORITY)**

**Current State**: Basic dashboard statistics
**Required**:

- Project timeline reports
- Budget tracking and financial reports
- Task completion analytics
- Project performance metrics
- Export to PDF/Excel
- Custom report builder
- Charts and graphs (Chart.js, D3.js)

### 💾 **4. Backup & Data Management (HIGH PRIORITY)**

**Current State**: Single SQLite file
**Required**:

- Automated database backups
- Data export/import functionality
- Database migration system
- Data archiving for old projects
- Recovery procedures

### 📱 **5. Mobile Responsiveness & PWA (MEDIUM PRIORITY)**

**Current State**: Basic responsive design
**Required**:

- Progressive Web App capabilities
- Offline functionality
- Mobile-optimized interface
- Push notifications
- App manifest and service workers

### 🔗 **6. API & Integration (MEDIUM PRIORITY)**

**Current State**: Internal REST API only
**Required**:

- External API integrations (accounting software, CRM)
- Webhook support
- API documentation (Swagger/OpenAPI)
- API versioning
- Third-party service integrations

### 📧 **7. Communication & Notifications (MEDIUM PRIORITY)**

**Current State**: No notification system
**Required**:

- Email notifications for deadlines, status changes
- In-app notifications
- SMS notifications (optional)
- Email templates
- Notification preferences per user

### 📋 **8. Enhanced Project Management (MEDIUM PRIORITY)**

**Current State**: Basic project tracking
**Required**:

- Gantt charts for project timelines
- Resource allocation and management
- Budget tracking per project
- Document attachment system
- Project templates
- Milestone tracking
- Dependencies between tasks

### 🔍 **9. Search & Filtering (LOW PRIORITY)**

**Current State**: Basic search implemented
**Required**:

- Advanced search with filters
- Full-text search
- Saved search queries
- Search autocomplete
- Global search across all entities

### ⚡ **10. Performance & Scalability (MEDIUM PRIORITY)**

**Current State**: Good for small-medium datasets
**Required**:

- Database optimization and indexing
- Caching layer (Redis)
- Image optimization
- Lazy loading
- Pagination for large datasets
- Background job processing

### 📝 **11. Documentation & Help System (LOW PRIORITY)**

**Current State**: README.md only
**Required**:

- User manual/documentation
- In-app help system
- API documentation
- Video tutorials
- FAQ section

### 🧪 **12. Testing & Quality Assurance (MEDIUM PRIORITY)**

**Current State**: Testing frameworks set up but no tests
**Required**:

- Unit tests for all components
- Integration tests for API endpoints
- E2E tests for critical user flows
- Performance testing
- Accessibility testing
- Code coverage reports

### 🚀 **13. DevOps & Deployment (MEDIUM PRIORITY)**

**Current State**: Docker setup exists
**Required**:

- CI/CD pipeline
- Production deployment strategy
- Environment management (dev, staging, prod)
- Monitoring and logging
- Error tracking (Sentry)
- Health checks

### 🎨 **14. UI/UX Improvements (LOW PRIORITY)**

**Current State**: Clean, functional interface
**Required**:

- Dark mode support
- Customizable themes
- Accessibility improvements (WCAG compliance)
- Keyboard navigation
- Better loading states
- Drag and drop functionality

---

## Implementation Priority Levels

### Phase 1: Security & Stability (Weeks 1-4)

1. Authentication system
2. Authorization and role management
3. Input validation and security
4. Backup system
5. Basic testing coverage

### Phase 2: Core Features (Weeks 5-8)

1. Advanced reporting
2. Mobile optimization
3. Notification system
4. Enhanced project management features

### Phase 3: Professional Features (Weeks 9-12)

1. API integrations
2. Performance optimization
3. Advanced UI features
4. Documentation

### Phase 4: Scale & Polish (Weeks 13-16)

1. DevOps improvements
2. Comprehensive testing
3. Advanced analytics
4. Third-party integrations

---

## Immediate Next Steps (Recommended Order)

1. **Set up Authentication**

   - Install NextAuth.js or implement custom auth
   - Create user management system
   - Add login/logout functionality

2. **Implement Input Validation**

   - Add Zod or Joi for schema validation
   - Protect all API endpoints
   - Add error handling

3. **Create Backup System**

   - Implement database backup scripts
   - Set up automated backups
   - Create recovery procedures

4. **Add Basic Tests**

   - Write unit tests for critical functions
   - Add integration tests for API routes
   - Set up test automation

5. **Implement Reporting**
   - Add Chart.js for visualizations
   - Create project timeline reports
   - Add export functionality

---

## Technology Recommendations

### Authentication

- **NextAuth.js** - For easy authentication setup
- **Prisma** - For better database management (optional upgrade from better-sqlite3)

### Security

- **Zod** - Runtime type checking and validation
- **bcryptjs** - Password hashing
- **rate-limiter-flexible** - Rate limiting

### Reporting

- **Chart.js** or **Recharts** - Data visualization
- **jsPDF** - PDF generation
- **xlsx** - Excel export

### Notifications

- **Nodemailer** - Email sending
- **Socket.io** - Real-time notifications

### Testing

- **MSW** - API mocking for tests
- **Testing Library** - Component testing
- **Faker.js** - Test data generation

---

## Current Strengths

1. **Well-structured codebase** with clear separation of concerns
2. **Modern tech stack** (Next.js, React, Tailwind)
3. **Good database design** with proper relationships
4. **Responsive UI** with professional appearance
5. **Docker support** for easy deployment
6. **Map integration** with multiple layers
7. **Modular components** that are reusable

---

## Estimated Development Time

- **Minimum Viable Professional App**: 8-12 weeks
- **Full-featured Professional App**: 16-20 weeks
- **Enterprise-grade Application**: 24-30 weeks

This assessment is based on a single developer working full-time. Team development could reduce these timelines significantly.