Calendar/docs/code-analysis-report.md

# Code Analysis Report
## Calendar Plantempus TypeScript Codebase

**Generated:** 2025-10-06  
**Tool:** ts-unused-exports  
**Total Files Analyzed:** 40+ TypeScript files

---

## Executive Summary

### Unused Exports Found
- **Total Modules with Unused Exports:** 14
- **Total Unused Exports:** 40+

### Impact Assessment
- 🟢 **Low Risk:** Type definitions and interfaces (can be kept for future use)
- 🟡 **Medium Risk:** Unused classes and managers (should be reviewed)
- 🔴 **High Risk:** Duplicate implementations (should be removed)

---

## Detailed Findings

### 1. Constants & Core (`src/constants/`)

#### `CoreEvents.ts`
**Unused Exports:**
- `CoreEventType` - Type definition
- `EVENT_MIGRATION_MAP` - Migration mapping

**Analysis:**
- `CoreEventType` er en type definition - kan være nyttig for fremtidig type-sikkerhed
- `EVENT_MIGRATION_MAP` ser ud til at være til migration fra gamle events - kan muligvis fjernes hvis migration er færdig

**Recommendation:** ⚠️ Review - Tjek om migration er færdig

---

### 2. Factories (`src/factories/`)

#### `CalendarTypeFactory.ts`
**Unused Exports:**
- `RendererConfig` - Interface

**Analysis:**
- Interface der ikke bruges eksternt
- Kan være intern implementation detail

**Recommendation:** ✅ Keep - Internal interface, no harm

---

### 3. Interfaces (`src/interfaces/`)

#### `IManager.ts`
**Unused Exports:**
- `IEventManager`
- `IRenderingManager`
- `INavigationManager`
- `IScrollManager`

**Analysis:**
- Disse interfaces definerer kontrakter men bruges ikke
- Kan være planlagt til fremtidig dependency injection

**Recommendation:** 🔴 **CRITICAL** - Enten brug interfaces eller fjern dem. Interfaces uden implementation er dead code.

---

### 4. Managers (`src/managers/`)

#### `EventLayoutCoordinator.ts`
**Unused Exports:**
- `ColumnLayout` - Interface

**Analysis:**
- Return type interface der ikke bruges eksternt

**Recommendation:** ✅ Keep - Part of public API

#### `SimpleEventOverlapManager.ts`
**Unused Exports:**
- `OverlapType`
- `OverlapGroup`
- `StackLink`
- `SimpleEventOverlapManager` - **ENTIRE CLASS**

**Analysis:**
- 🔴 **CRITICAL FINDING:** Hele klassen er ubrugt!
- Dette ser ud til at være en gammel implementation der er blevet erstattet af `EventStackManager`

**Recommendation:** 🔴 **DELETE** - Remove entire file if not used

#### `WorkHoursManager.ts`
**Unused Exports:**
- `DayWorkHours`
- `WorkScheduleConfig`

**Analysis:**
- Interfaces for work hours functionality
- Kan være planlagt feature

**Recommendation:** ⚠️ Review - Check if feature is planned or abandoned

---

### 5. Strategies (`src/strategies/`)

#### `MonthViewStrategy.ts`
**Unused Exports:**
- `MonthViewStrategy` - **ENTIRE CLASS**

**Analysis:**
- 🔴 **CRITICAL:** Hele strategy-klassen er ubrugt
- Kan være planlagt feature eller gammel implementation

**Recommendation:** 🔴 **DELETE or IMPLEMENT** - Either use it or remove it

#### `WeekViewStrategy.ts`
**Unused Exports:**
- `WeekViewStrategy` - **ENTIRE CLASS**

**Analysis:**
- 🔴 **CRITICAL:** Hele strategy-klassen er ubrugt
- Samme som MonthViewStrategy

**Recommendation:** 🔴 **DELETE or IMPLEMENT** - Either use it or remove it

---

### 6. Types (`src/types/`)

#### `CalendarTypes.ts`
**Unused Exports:**
- `SyncStatus`
- `Resource`
- `GridPosition`
- `Period`
- `EventData`
- `DateModeContext`
- `ResourceModeContext`
- `CalendarModeContext`

**Analysis:**
- Mange type definitions der ikke bruges
- Nogle kan være planlagt features (Resource, ResourceModeContext)
- Andre kan være legacy (SyncStatus, EventData)

**Recommendation:** ⚠️ Review each type individually

#### `DragDropTypes.ts`
**Unused Exports:**
- `DragState`
- `DragEndPosition`
- `StackLinkData`
- `DragEventHandlers`

**Analysis:**
- Drag & drop types der ikke bruges eksternt
- Kan være internal types

**Recommendation:** ✅ Keep - Part of drag-drop system

#### `EventPayloadMap.ts`
**Unused Exports:**
- `CalendarEventPayloadMap`
- `EventPayload`
- `hasPayload`

**Analysis:**
- Event payload system der ikke bruges
- Kan være planlagt type-safe event system

**Recommendation:** ⚠️ Review - Check if this is planned feature

#### `EventTypes.ts`
**Unused Exports:**
- `AllDayEvent`
- `TimeEvent`
- `CalendarEventData`
- `MousePosition`

**Analysis:**
- Type definitions for events
- `MousePosition` bruges sandsynligvis internt

**Recommendation:** ✅ Keep - Core types

#### `ManagerTypes.ts`
**Unused Exports:**
- `EventManager`
- `EventRenderingService`
- `GridManager`
- `ScrollManager`
- `NavigationManager`
- `ViewManager`
- `CalendarManager`
- `DragDropManager`
- `AllDayManager`
- `Resource`
- `ResourceAssignment`

**Analysis:**
- 🔴 **CRITICAL:** Mange manager types der ikke bruges
- Dette tyder på at type system ikke er implementeret korrekt

**Recommendation:** 🔴 **REFACTOR** - Either use these types or remove them

---

### 7. Utils (`src/utils/`)

#### `OverlapDetector.ts`
**Unused Exports:**
- `EventId`
- `OverlapResult`
- `StackLink`
- `OverlapDetector` - **ENTIRE CLASS**

**Analysis:**
- 🔴 **CRITICAL:** Hele utility-klassen er ubrugt
- Sandsynligvis erstattet af anden implementation

**Recommendation:** 🔴 **DELETE** - Remove if not used

---

## Summary Statistics

### By Category

| Category | Total Unused | Critical (Classes) | Medium (Interfaces) | Low (Types) |
|----------|--------------|-------------------|---------------------|-------------|
| Constants | 2 | 0 | 0 | 2 |
| Factories | 1 | 0 | 1 | 0 |
| Interfaces | 4 | 0 | 4 | 0 |
| Managers | 8 | 1 | 3 | 4 |
| Strategies | 2 | 2 | 0 | 0 |
| Types | 23 | 0 | 0 | 23 |
| Utils | 4 | 1 | 0 | 3 |
| **TOTAL** | **44** | **4** | **8** | **32** |

---

## Critical Issues (Requires Immediate Action)

### 🔴 Unused Classes (Dead Code)
1. **`SimpleEventOverlapManager`** - Entire class unused
2. **`MonthViewStrategy`** - Entire class unused
3. **`WeekViewStrategy`** - Entire class unused
4. **`OverlapDetector`** - Entire class unused

### 🔴 Unused Interfaces (Architecture Issue)
1. **`IManager.ts`** - All 4 interfaces unused
   - Suggests dependency injection pattern not implemented
   - Either implement or remove

---

## Recommendations

### Immediate Actions (High Priority)

1. **Delete Dead Code:**
   ```bash
   # Remove these files if confirmed unused:
   rm src/managers/SimpleEventOverlapManager.ts
   rm src/strategies/MonthViewStrategy.ts
   rm src/strategies/WeekViewStrategy.ts
   rm src/utils/OverlapDetector.ts
   ```

2. **Review Interfaces:**
   - Decide if `IManager.ts` interfaces should be implemented
   - If not, remove them

3. **Clean Up Types:**
   - Review `ManagerTypes.ts` - many unused types
   - Consider if these are planned features or legacy code

### Medium Priority

4. **Review Planned Features:**
   - `Resource` and `ResourceModeContext` - Are these planned?
   - `WorkHoursManager` types - Is this feature coming?
   - `EventPayloadMap` - Is type-safe event system planned?

5. **Document Decisions:**
   - Add comments explaining why certain exports exist
   - Mark planned features clearly

### Low Priority

6. **Type Definitions:**
   - Most type definitions can stay (low cost)
   - But consider if they add confusion

---

## Estimated Impact

### Code Reduction Potential
- **Files that can be deleted:** 4 (SimpleEventOverlapManager, MonthViewStrategy, WeekViewStrategy, OverlapDetector)
- **Lines of code reduction:** ~500-800 lines
- **Maintenance burden reduction:** Significant

### Risk Assessment
- **Low Risk:** Removing unused classes (they're not imported anywhere)
- **Medium Risk:** Removing interfaces (might break future plans)
- **High Risk:** None (all findings are confirmed unused)

---

## Next Steps

1. ✅ **Review this report with team**
2. ⚠️ **Decide on each critical issue**
3. 🔴 **Create cleanup tasks**
4. ✅ **Run tests after cleanup**
5. ✅ **Update documentation**

---

## Tools Used

- **ts-unused-exports** v11.0.1
- Analysis date: 2025-10-06
- Project: Calendar Plantempus