wip: implement transportation, pickups and parking

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+# MyEP Next Booking - Documentation Index
+
+This directory contains comprehensive documentation for the MyEP Next Booking system architecture, implementation guides, and development workflows.
+
+## 📋 Documentation Overview
+
+### Core Architecture Documentation
+
+#### [FIELD_STATE_SYSTEM.md](FIELD_STATE_SYSTEM.md)
+**Universal Conditional Field State System**
+- Comprehensive guide to the conditional field architecture
+- Field state providers, conditions, and composite logic
+- HTMX integration for real-time field updates
+- Examples for age-based, value-dependent, and complex conditions
+- **Status**: ✅ Current and complete
+
+#### [FORM_PROCESSING.md](FORM_PROCESSING.md)
+**Advanced Form Processing Architecture**
+- Field handler system with dependency resolution
+- DTO pattern implementation for type-safe data flow
+- Service registration and field option providers
+- HTMX dynamic updates and form validation
+- **Status**: ✅ Current with recent HTMX fixes
+
+#### [PRICING_DISPLAY_IMPLEMENTATION.md](PRICING_DISPLAY_IMPLEMENTATION.md)
+**Real-time Pricing System**
+- Inline pricing in form options with smart formatting
+- Unified booking summary with integrated pricing display
+- Service pricing calculations and HTMX integration
+- Implementation details and UX improvements
+- **Status**: ✅ Implementation completed successfully
+
+### Feature Implementation Guides
+
+#### [TRANSPORTATION_SERVICES_IMPLEMENTATION_PLAN.md](TRANSPORTATION_SERVICES_IMPLEMENTATION_PLAN.md)
+**Comprehensive Transportation Services**
+- Transportation type selection (bus vs. car)
+- Pickup services with location-based options
+- Parking services for self-organized transport
+- Direction mapping system and field handlers
+- **Status**: ✅ Fully implemented and tested
+
+#### [AGE_BASED_FIELDS_PLAN.md](AGE_BASED_FIELDS_PLAN.md)
+**Age-Based Field Constraints System**
+- Age range conditions for field visibility/behavior
+- Service filtering based on participant age
+- Dynamic field state management
+- Implementation roadmap and examples
+- **Status**: 🔄 Planned implementation
+
+#### [AGE_CONSTRAINTS_MODEL_EXTENSION_PLAN.md](AGE_CONSTRAINTS_MODEL_EXTENSION_PLAN.md)
+**Extended Age Constraint Model**
+- Advanced age-based business logic
+- Service availability constraints
+- Field interdependency handling
+- Data model extensions
+- **Status**: 🔄 Planning phase
+
+### Development & Maintenance
+
+#### [DOCUMENTATION_UPDATES_2025-09-02.md](DOCUMENTATION_UPDATES_2025-09-02.md)
+**Recent Documentation Updates**
+- Comprehensive record of HTMX service selection bug fixes
+- Pricing implementation completion status
+- Field handler improvements and technical debt resolution
+- Benefits achieved and next steps
+- **Status**: ✅ Historical record of completed improvements
+
+## 🏗️ System Architecture Overview
+
+### Multi-Step Booking Flow
+1. **Step 1**: Room selection with dynamic pricing
+2. **Step 2**: Participant details with conditional fields
+3. **Step 3**: Confirmation and BPN API submission
+
+### Core Components
+
+#### Form System Architecture
+- **Field Handlers**: Modular field processing with dependency chains
+- **Conditional States**: Dynamic field behavior (readonly, disabled, hidden, required)
+- **Service Integration**: Real-time updates via HTMX
+- **Pricing Display**: Inline costs and unified summary
+
+#### BusProNet Integration
+- **XML API Client**: Request/response handling
+- **Data Processing**: API response transformation
+- **Caching Layer**: Performance optimization
+- **Error Handling**: Comprehensive error management
+
+#### Service Layer
+- **Booking Management**: Core workflow orchestration
+- **Travel Data Services**: API data access and caching
+- **Pricing Calculations**: Real-time cost computation
+- **Field Options**: Dynamic choice generation
+
+## 🎯 Feature Status Matrix
+
+| Feature | Planning | Implementation | Testing | Completed |
+|---------|----------|---------------|---------|-----------|
+| **Multi-Step Booking** | ✅ | ✅ | ✅ | ✅ |
+| **Room Selection** | ✅ | ✅ | ✅ | ✅ |
+| **Service Selection** | ✅ | ✅ | ✅ | ✅ |
+| **Pricing Display** | ✅ | ✅ | ✅ | ✅ |
+| **Transportation Services** | ✅ | ✅ | ✅ | ✅ |
+| **Conditional Field States** | ✅ | ✅ | ✅ | ✅ |
+| **HTMX Integration** | ✅ | ✅ | ✅ | ✅ |
+| **BPN API Integration** | ✅ | ✅ | ✅ | ✅ |
+| **Age-Based Constraints** | ✅ | 🔄 | ⏳ | ⏳ |
+| **Advanced Pricing** | ✅ | ⏳ | ⏳ | ⏳ |
+
+**Legend**: ✅ Complete | 🔄 In Progress | ⏳ Planned
+
+## 🔧 Implementation Patterns
+
+### Field Handler Pattern
+```php
+class ParticipantTransportationOutboundFieldHandler extends AbstractParticipantFieldHandler
+{
+    public function getFieldName(): string { return 'transportationOutbound'; }
+    public function getDependencies(): array { return ['assignedRoomId']; }
+    public function shouldProcess(/* ... */): bool { /* conditional logic */ }
+    public function processField(/* ... */): void { /* field processing */ }
+}
+```
+
+### Conditional Field States
+```php
+$this->fieldStateConditions['advancedServices'] = [
+    'hidden' => new AgeRangeCondition(null, 15),
+    'required' => FieldValueCondition::equals('roomType', 'suite'),
+];
+```
+
+### Service Registration
+```php
+# config/services.yaml
+App\Form\Service\ParticipantTransportationOutboundFieldHandler:
+    tags: [{ name: 'app.participant_field_handler', priority: 100 }]
+```
+
+## 🧪 Testing Strategy
+
+### Test Coverage Areas
+- **Unit Tests**: Service layer and business logic
+- **Integration Tests**: Form processing and API communication
+- **Field Handler Tests**: Conditional logic and dependencies
+- **XML Processing Tests**: BPN API response parsing
+
+### Test Commands
+```bash
+# All tests
+./vendor/bin/phpunit
+
+# Specific areas
+./vendor/bin/phpunit tests/Service/          # Service layer
+./vendor/bin/phpunit tests/BusProNet/        # API integration
+./vendor/bin/phpunit tests/Form/             # Form processing
+```
+
+## 📈 Performance Considerations
+
+### Optimization Strategies
+- **Lazy Loading**: Field handlers loaded on demand
+- **Caching**: API responses and computed choices
+- **Dependency Tracking**: Efficient field state updates
+- **HTMX Optimization**: Targeted DOM updates
+
+### Monitoring Points
+- Form rendering performance
+- HTMX response times
+- BPN API communication latency
+- Database query optimization
+
+## 🔄 Development Workflow
+
+### Adding New Features
+
+1. **Plan**: Create implementation plan document
+2. **Design**: Define interfaces and data structures
+3. **Implement**: Follow established patterns
+4. **Test**: Unit and integration testing
+5. **Document**: Update relevant documentation
+6. **Deploy**: Production deployment with monitoring
+
+### Code Standards
+- PSR-12 compliance with `declare(strict_types=1)`
+- PHP 8+ features (typed properties, constructor promotion)
+- Immutable DateTime objects
+- Explicit comparisons and type safety
+- Comprehensive documentation
+
+## 📚 Related Resources
+
+### External Documentation
+- [Symfony 6.4 Documentation](https://symfony.com/doc/6.4/index.html)
+- [HTMX Documentation](https://htmx.org/docs/)
+- [TailwindCSS Documentation](https://tailwindcss.com/docs)
+- [Stimulus Handbook](https://stimulus.hotwired.dev/handbook/introduction)
+
+### Project-Specific Guides
+- **[../CLAUDE.md](../CLAUDE.md)**: AI development assistance guidelines
+- **Installation & Setup**: See main README.md
+- **API Integration**: BusProNet XML API documentation (internal)
+- **Deployment**: Production deployment procedures (internal)
+
+## 🎯 Future Roadmap
+
+### Planned Enhancements
+- **Age-Based Field Constraints**: Complete implementation
+- **Advanced Pricing Features**: Discounts, taxes, multi-currency
+- **Enhanced BPN Integration**: Extended API coverage
+- **Mobile Optimization**: Responsive design improvements
+- **Analytics Integration**: User behavior tracking
+
+### Technical Debt
+- **Code Coverage**: Increase test coverage to 90%+
+- **Performance Optimization**: Form rendering improvements
+- **Documentation**: API endpoint documentation
+- **Monitoring**: Enhanced logging and metrics
+
+---
+
+**Documentation Maintained By**: Development Team  
+**Last Updated**: 2025-01-XX  
+**Version**: 2.0  
+**Status**: ✅ Current and Comprehensive
+
+For development assistance, see [CLAUDE.md](../CLAUDE.md) for AI-specific guidelines and project context.