# EventBuzz Refactoring Implementation Checklist

## Phase 1: Foundation & Shared Components (High Impact)

### 1.1 Create Shared Component Library

#### Menus
- [ ] `OverflowMenu.tsx` - Extract from 4+ files
  - [ ] AgendaPage.tsx
  - [ ] ParticipantsPage.tsx
  - [ ] EventsPage.tsx
  - [ ] GlobalStubPage.tsx
- [ ] `ContextMenu.tsx` - For future use

#### Modals
- [ ] `ConfirmModal.tsx` - Extract from 2+ files
  - [ ] AgendaPage.tsx
  - [ ] ParticipantsPage.tsx
- [ ] `BaseModal.tsx` - Foundation for all modals
- [ ] `FormModal.tsx` - For create/edit forms

#### Badges
- [ ] `StatusBadge.tsx` - Extract status badge patterns
  - [ ] AgendaPage.tsx (StatusPill)
  - [ ] ParticipantsPage.tsx (StatusDot)
  - [ ] EventsPage.tsx (StatusBadge)
- [ ] `TypeBadge.tsx` - Extract type badge patterns
  - [ ] AgendaPage.tsx (TypeBadge)
  - [ ] EventsPage.tsx (TypeBadge)
- [ ] `RoleBadge.tsx` - Extract role badge patterns
  - [ ] ParticipantsPage.tsx (RoleBadge)

#### Forms
- [ ] `InputField.tsx` - Standard input with label
  - [ ] AgendaPage.tsx (InputField)
  - [ ] ParticipantsPage.tsx (Field)
  - [ ] SettingsPage.tsx (Field)
- [ ] `SelectField.tsx` - Standard select with label
- [ ] `ToggleField.tsx` - Standard toggle switch

#### Layout
- [ ] `EmptyState.tsx` - Extract empty state patterns
  - [ ] GlobalStubPage.tsx (EmptyState)
  - [ ] AgendaPage.tsx (empty track state)
  - [ ] ParticipantsPage.tsx (empty search state)
- [ ] `LoadingState.tsx` - Standard loading component
- [ ] `ErrorBoundary.tsx` - Error handling component

### 1.2 Extract Common Patterns
- [ ] Button styling system
- [ ] Table/Row patterns
- [ ] Card components
- [ ] Filter components

---

## Phase 2: State Management & API Layer

### 2.1 API Service Layer

#### Core Structure
- [ ] Create `src/services/` directory
- [ ] `api/client.ts` - HTTP client with interceptors
- [ ] `api/types.ts` - API response types

#### Service Modules
- [ ] `api/events.ts` - Event-related endpoints
- [ ] `api/participants.ts` - Participant endpoints
- [ ] `api/auth.ts` - Authentication
- [ ] `api/settings.ts` - Settings endpoints

#### Mock Data Layer
- [ ] `mock/events.ts` - Mock event data
- [ ] `mock/participants.ts` - Mock participant data
- [ ] `mock/speakers.ts` - Mock speaker data
- [ ] `mock/index.ts` - Mock API switch

### 2.2 State Management

#### Store Setup
- [ ] Install Zustand (or choose React Context)
- [ ] Create `src/store/` directory
- [ ] `store/index.ts` - Main store setup

#### Store Slices
- [ ] `store/events/` - Event management
  - [ ] `slice.ts` - Event state slice
  - [ ] `actions.ts` - Event actions
- [ ] `store/participants/` - Participant management
  - [ ] `slice.ts` - Participant state slice
  - [ ] `actions.ts` - Participant actions
- [ ] `store/ui/` - UI state
  - [ ] `slice.ts` - UI state slice
  - [ ] `actions.ts` - UI actions

---

## Phase 3: Component Refactoring

### 3.1 Split Monolithic Components

#### AgendaPage Refactoring
- [ ] Create `src/components/agenda/` directory
- [ ] Extract `TrackAccordion.tsx`
- [ ] Extract `SessionRow.tsx`
- [ ] Extract `SessionCard.tsx`
- [ ] Extract `SessionModal.tsx`
- [ ] Extract `TrackModal.tsx`
- [ ] Create `hooks/useAgendaData.ts`
- [ ] Create `hooks/useAgendaActions.ts`
- [ ] Refactor main `AgendaPage.tsx` to use extracted components

#### ParticipantsPage Refactoring
- [ ] Create `src/components/participants/` directory
- [ ] Extract `ParticipantRow.tsx`
- [ ] Extract `ParticipantCard.tsx`
- [ ] Extract `ViewModal.tsx`
- [ ] Extract `EditModal.tsx`
- [ ] Create `hooks/useParticipantsData.ts`
- [ ] Create `hooks/useParticipantsActions.ts`
- [ ] Refactor main `ParticipantsPage.tsx`

#### EventsPage Refactoring
- [ ] Create `src/components/events/` directory
- [ ] Extract `EventCard.tsx`
- [ ] Extract `EventRow.tsx`
- [ ] Extract `CategorySection.tsx`
- [ ] Extract `CalendarView.tsx`
- [ ] Create `hooks/useEventsData.ts`
- [ ] Create `hooks/useEventsActions.ts`
- [ ] Refactor main `EventsPage.tsx`

### 3.2 Implement Container/Presenter Pattern
- [ ] Identify container components
- [ ] Extract presenter components
- [ ] Create custom hooks for business logic
- [ ] Update existing pages to use pattern

---

## Phase 4: Configuration & Theming

### 4.1 Centralized Configuration
- [ ] Create `src/config/` directory
- [ ] `config/colors.ts` - Color mappings
- [ ] `config/statusStyles.ts` - Status badge styles
- [ ] `config/roleStyles.ts` - Role badge styles
- [ ] `config/constants.ts` - App constants
- [ ] `config/featureFlags.ts` - Feature toggles

### 4.2 Enhanced Theming System
- [ ] Extend theme context beyond light/dark
- [ ] Add support for custom brand colors
- [ ] Create component-level theme variants
- [ ] Update components to use theme tokens

---

## Phase 5: Performance & Optimization

### 5.1 Code Splitting
- [ ] Implement route-based code splitting
- [ ] Add lazy loading for heavy components
- [ ] Configure dynamic imports
- [ ] Measure bundle size impact

### 5.2 Memoization
- [ ] Add React.memo to pure components
- [ ] Implement useMemo for expensive computations
- [ ] Implement useCallback for event handlers
- [ ] Add virtualization for large lists

### 5.3 Performance Monitoring
- [ ] Set up Lighthouse CI
- [ ] Add bundle size tracking
- [ ] Implement performance budgets
- [ ] Add runtime performance monitoring

---

## Phase 6: Testing & Documentation

### 6.1 Testing Infrastructure
- [ ] Set up Jest + React Testing Library
- [ ] Configure testing environment
- [ ] Create test utilities
- [ ] Add CI test pipeline

### 6.2 Test Coverage
- [ ] Unit tests for shared components
- [ ] Integration tests for pages
- [ ] End-to-end tests for critical flows
- [ ] Test state management

### 6.3 Documentation
- [ ] Component documentation
- [ ] API documentation
- [ ] Architecture documentation
- [ ] Development guides

---

## Implementation Timeline

### Week 1-2: Foundation
- Complete Phase 1.1 (Shared Components)
- Start Phase 2.1 (API Service Layer)

### Week 3-4: State & Refactoring
- Complete Phase 2 (State Management)
- Start Phase 3.1 (AgendaPage Refactoring)

### Week 5-6: Configuration & Performance
- Complete Phase 3 (Component Refactoring)
- Start Phase 4 (Configuration)
- Begin Phase 5.1 (Code Splitting)

### Week 7-8: Testing & Polish
- Complete Phase 5 (Performance)
- Start Phase 6 (Testing)
- Documentation updates

---

## Success Criteria

### Code Quality
- [ ] 30% reduction in total lines of code
- [ ] 40% of components are shared/reusable
- [ ] 90% of identified duplications eliminated
- [ ] 80% test coverage achieved

### Performance
- [ ] 20% reduction in bundle size
- [ ] 30% improvement in initial load time
- [ ] Lighthouse scores 90+ in all categories

### Developer Experience
- [ ] New components can be added in < 1 hour
- [ ] Common patterns have single change points
- [ ] Full TypeScript type safety
- [ ] Comprehensive documentation available

---

## Risk Mitigation

### Technical Risks
- [ ] Create rollback plan for each major change
- [ ] Maintain backward compatibility during transition
- [ ] Test thoroughly before merging to main
- [ ] Monitor error rates after deployment

### Team Risks
- [ ] Provide training on new patterns
- [ ] Create migration guides
- [ ] Pair programming for knowledge sharing
- [ ] Regular check-ins on progress

### Timeline Risks
- [ ] Prioritize high-impact changes first
- [ ] Break work into small, manageable chunks
- [ ] Regular progress reviews
- [ ] Adjust timeline based on velocity

---

## Progress Tracking

### Daily
- Update checklist items
- Track lines of code changed
- Monitor test coverage

### Weekly
- Review progress against timeline
- Adjust priorities as needed
- Share updates with team

### Monthly
- Measure success criteria
- Review performance metrics
- Plan next phase

---

## Notes & Decisions

### Key Decisions Needed:
1. State management library choice (Zustand vs Context + useReducer)
2. Testing framework configuration
3. Performance monitoring tools
4. Documentation platform

### Assumptions:
- Team size: 2-3 developers
- Development velocity: Medium
- Priority: Maintainability over new features
- Budget: Available for tooling if needed

### Constraints:
- Must maintain existing functionality
- Limited disruption to users
- Gradual rollout preferred
- Backward compatibility important

---

## Changelog

### v1.0 (March 2025)
- Initial checklist created
- Based on comprehensive code analysis
- Prioritized by impact and effort

### Updates:
- [Date]: [Change description]
- [Date]: [Change description]

---

## Contact

For questions or updates to this checklist, contact the development team.

**Last Updated**: March 2025
**Version**: 1.0
**Status**: Active