# Power System Designer - Integration Summary

## ✅ **Fixes and Improvements Implemented**

### **1. Fixed Object Selection**
- **Issue**: Selection tool didn't work properly
- **Fix**: 
  - Implemented proper `findObjectAt()` function with correct hit detection
  - Added visual feedback for selected objects (blue glow)
  - Improved click detection accuracy with 20px radius

### **2. Added Object Dragging**
- **Issue**: Objects couldn't be moved
- **Fix**:
  - Implemented `handleCanvasMouseDown`, `handleCanvasMouseMove`, and `handleCanvasMouseUp` event handlers
  - Added drag state management with `isDragging` and `dragOffset`
  - Objects snap to 20px grid while dragging
  - Visual feedback during dragging operations

### **3. Fixed Cable Connection Tool**
- **Issue**: Cable connection tool didn't work at all
- **Fix**:
  - Proper two-click connection workflow
  - Visual feedback showing selected connection source (orange highlight)
  - Connection status indicator overlay
  - Automatic cable length calculation based on object positions
  - Prevention of duplicate connections and self-connections
  - Error messages for invalid connections

### **4. Enhanced Object Data Structure**
- **Issue**: Objects didn't have all necessary information
- **Fix**:
  - Added comprehensive object properties:
    - `typeDescription` - Custom type descriptions
    - `load` - Current load vs rated power
    - `voltage` - Operating voltage
    - `current` - Current flow (for calculations)
    - Position tracking (`x`, `y`)
    - Proper default values for each object type

### **5. Improved Cable Data Structure**
- **Enhanced Cable Properties**:
  - `resistance` - Electrical resistance based on cable type/size
  - Better cable type handling (underground vs overhead)
  - Automatic resistance calculation
  - Improved cable length calculation

### **6. Enhanced User Interface**

#### **Object Properties Panel**:
- Object type indicator with ID
- Position display (X, Y coordinates)
- Type-specific property fields
- Enhanced transformer properties (primary/secondary voltage, power rating)
- Load vs power rating for distribution points
- Custom type descriptions

#### **Cable Properties Panel**:
- Connection source/destination display
- Electrical parameters (resistance, installation type)
- Cable type selection with proper underground/overhead distinction
- Cross-section selection with standard sizes
- Delete cable functionality

#### **Visual Improvements**:
- Better object highlighting (selected vs connection source)
- Improved cable rendering with proper colors:
  - Purple: Underground cables (YAKY, NA2XY-J)
  - Orange: Overhead cables (AL, AsXSn)
  - Dashed lines for overhead cables
- Cable labels with background for better readability
- Connection status indicator overlay

### **7. Added Interaction Features**

#### **Mouse Controls**:
- **Left Click**: Select/place objects
- **Drag**: Move selected objects (with grid snapping)
- **Connect Mode**: Two-click cable connection workflow

#### **Keyboard Shortcuts**:
- **Delete/Backspace**: Delete selected object or cable
- **Escape**: Clear selection and return to select mode

#### **Object Management**:
- Delete objects (with automatic cable cleanup)
- Delete cables individually
- Proper state management for selections

### **8. Error Handling and Validation**
- Transformer limit enforcement (only one allowed)
- Duplicate connection prevention
- Self-connection prevention
- Error messages with clear descriptions
- Input validation for numeric fields

### **9. Technical Improvements**

#### **Event System**:
- Proper mouse event handling with coordinate transformation
- Grid snapping for precise placement
- Drag offset calculation for smooth object movement

#### **State Management**:
- Clean separation of object and cable selections
- Proper state updates with React patterns
- Automatic re-rendering on state changes

#### **Performance**:
- Efficient hit detection algorithms
- Optimized canvas rendering
- Proper event listener cleanup

## **🎯 Key Features Now Working**

1. **✅ Object Selection**: Click objects to select and edit properties
2. **✅ Object Movement**: Drag objects to new positions with grid snapping
3. **✅ Cable Connections**: Two-click workflow to connect objects
4. **✅ Property Editing**: Comprehensive property panels for all object types
5. **✅ Visual Feedback**: Clear indication of selected items and connection states
6. **✅ Delete Functions**: Remove objects and cables with keyboard shortcuts
7. **✅ Data Persistence**: Export/import with complete object data
8. **✅ Electrical Calculations**: Ready for voltage drop analysis

## **🔧 Usage Instructions**

### **Adding Objects**:
1. Click object type button in toolbar (Transformer, Box, Pole, End Connection)
2. Click on canvas to place object
3. Object automatically snaps to grid

### **Selecting and Moving**:
1. Click "Wybierz" (Select) tool
2. Click object to select (blue highlight appears)
3. Drag selected object to move (snaps to grid)

### **Connecting with Cables**:
1. Click "Połącz kablem" (Connect with Cable) tool
2. Click first object (orange highlight appears)
3. Click second object to create cable connection
4. Cable appears with automatic length calculation

### **Editing Properties**:
1. Select object or cable
2. Use properties panel on right to edit all parameters
3. Changes are saved automatically

### **Deleting Items**:
1. Select object or cable
2. Press Delete/Backspace key, OR
3. Use "Usuń" (Delete) button in properties panel

The power system designer is now fully functional with professional-grade features for electrical system design and analysis!