# 🎨 **Component Design Documents**

## **Overview**
This directory contains small design files (under 300 lines) for each component that needs to be built or fixed in the leptos-shadcn-ui project.

## **Design Documents**

### **🔴 P0 - Critical Components (Broken)**
- [`signal-management-design.md`](./signal-management-design.md) - Signal lifecycle management utilities
- [`input-component-design.md`](./input-component-design.md) - Text input with validation
- [`command-component-design.md`](./command-component-design.md) - Command palette interface

### **🟢 P2 - Working Components (Reference)**
- [`button-component-design.md`](./button-component-design.md) - Interactive buttons with variants
- [`form-component-design.md`](./form-component-design.md) - Form building blocks

## **Design Principles**

### **1. Small and Focused**
- Each design file is under 300 lines
- Focused on a single component or related components
- Clear separation of concerns

### **2. Production Ready**
- Complete API definitions
- Proper error handling
- Accessibility features
- Type safety

### **3. Leptos 0.8+ Compatible**
- Uses latest Leptos patterns
- Signal-based reactivity
- Proper component structure
- Modern Rust practices

### **4. ShadCN UI Compatible**
- Matches ShadCN UI design system
- Consistent styling patterns
- Proper variant and size support
- Accessibility compliance

## **Component Structure**

### **Core Component**
```rust
#[component]
pub fn ComponentName(
    // Props with proper types
    #[prop(into, optional)] prop1: Option<Type1>,
    #[prop(into, optional)] prop2: Option<Signal<Type2>>,
    // ... other props
) -> impl IntoView {
    // Component implementation
}
```

### **Supporting Types**
```rust
#[derive(Debug, Clone, PartialEq)]
pub enum ComponentVariant {
    // Variant options
}

#[derive(Debug, Clone, PartialEq)]
pub enum ComponentSize {
    // Size options
}
```

### **Usage Examples**
```rust
view! {
    <ComponentName
        prop1=value1
        prop2=signal2
    >
        "Content"
    </ComponentName>
}
```

## **Implementation Guidelines**

### **1. Props Design**
- Use `Option<T>` for optional props
- Use `Signal<T>` for reactive props
- Use `Callback<T>` for event handlers
- Use `Children` for child content

### **2. Styling**
- Use Tailwind CSS classes
- Support custom classes via `class` prop
- Implement variant and size systems
- Ensure responsive design

### **3. Accessibility**
- Proper ARIA attributes
- Keyboard navigation support
- Screen reader compatibility
- Focus management

### **4. Error Handling**
- Use `Result<T, E>` for fallible operations
- Provide meaningful error messages
- Handle edge cases gracefully
- Log errors appropriately

## **Testing Strategy**

### **1. Unit Tests**
- Test component rendering
- Test prop handling
- Test event handling
- Test state management

### **2. Integration Tests**
- Test component interactions
- Test form validation
- Test accessibility features
- Test performance

### **3. E2E Tests**
- Test user workflows
- Test keyboard navigation
- Test screen reader compatibility
- Test responsive behavior

## **Documentation Standards**

### **1. API Documentation**
- Document all props
- Provide usage examples
- Explain behavior
- Note limitations

### **2. Code Comments**
- Explain complex logic
- Document assumptions
- Provide context
- Note future improvements

### **3. Examples**
- Basic usage
- Advanced features
- Common patterns
- Best practices

## **Quality Checklist**

### **Before Implementation**
- [ ] Design document is complete
- [ ] API is well-defined
- [ ] Examples are provided
- [ ] Accessibility is considered

### **During Implementation**
- [ ] Follows design document
- [ ] Implements all features
- [ ] Handles errors properly
- [ ] Includes tests

### **After Implementation**
- [ ] All tests pass
- [ ] Documentation is updated
- [ ] Examples work
- [ ] Performance is acceptable

---

**Last Updated**: 2025-01-27
**Status**: 📋 **DESIGN PHASE**
