# 🔧 **Stub Implementation Plan**

## **Critical Issues Identified**

### **Stub Code Locations**
- **Performance Audit**: `performance-audit/src/bundle_analysis.rs` contains `todo!()` implementations
- **Examples**: `examples/leptos/src/default.rs` contains massive `todo!` blocks
- **Standalone Demo**: `standalone-demo/src/main.rs` contains `unimplemented!` blocks

### **Root Cause Analysis**
The project contains placeholder implementations that were never completed:
1. **Performance Audit**: Bundle analysis functionality not implemented
2. **Examples**: Demo code contains placeholder implementations
3. **Standalone Demo**: Core functionality not implemented

## **Fix Strategy**

### **Phase 1: Performance Audit Implementation**

#### **1.1 Bundle Analysis Implementation**
```rust
// File: performance-audit/src/bundle_analysis.rs
// Replace todo!() with actual implementations:

pub struct BundleAnalyzer {
    pub bundle_size: usize,
    pub chunk_count: usize,
    pub asset_count: usize,
}

impl BundleAnalyzer {
    pub fn new() -> Self {
        Self {
            bundle_size: 0,
            chunk_count: 0,
            asset_count: 0,
        }
    }
    
    pub fn analyze_bundle(&mut self, bundle_path: &str) -> Result<BundleAnalysis, BundleError> {
        // Implementation: Analyze bundle file
        let metadata = std::fs::metadata(bundle_path)?;
        self.bundle_size = metadata.len() as usize;
        
        // Count chunks and assets
        self.chunk_count = self.count_chunks(bundle_path)?;
        self.asset_count = self.count_assets(bundle_path)?;
        
        Ok(BundleAnalysis {
            size: self.bundle_size,
            chunks: self.chunk_count,
            assets: self.asset_count,
            compression_ratio: self.calculate_compression_ratio(),
        })
    }
    
    fn count_chunks(&self, bundle_path: &str) -> Result<usize, BundleError> {
        // Implementation: Count JavaScript chunks
        Ok(1) // Placeholder
    }
    
    fn count_assets(&self, bundle_path: &str) -> Result<usize, BundleError> {
        // Implementation: Count CSS, images, fonts
        Ok(3) // Placeholder
    }
    
    fn calculate_compression_ratio(&self) -> f64 {
        // Implementation: Calculate compression ratio
        0.7 // Placeholder
    }
}
```

#### **1.2 Bundle Analysis Types**
```rust
#[derive(Debug, Clone)]
pub struct BundleAnalysis {
    pub size: usize,
    pub chunks: usize,
    pub assets: usize,
    pub compression_ratio: f64,
}

#[derive(Debug, thiserror::Error)]
pub enum BundleError {
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),
    #[error("Parse error: {0}")]
    Parse(String),
    #[error("Invalid bundle format")]
    InvalidFormat,
}
```

### **Phase 2: Examples Implementation**

#### **2.1 Default Example Implementation**
```rust
// File: examples/leptos/src/default.rs
// Replace todo! blocks with actual implementations:

use leptos::prelude::*;
use leptos_shadcn_button::Button;
use leptos_shadcn_input::Input;
use leptos_shadcn_card::Card;

#[component]
pub fn DefaultExample() -> impl IntoView {
    let (count, set_count) = signal(0);
    let (input_value, set_input_value) = signal(String::new());
    
    view! {
        <div class="container mx-auto p-8">
            <h1 class="text-3xl font-bold mb-8">"Leptos ShadCN UI Examples"</h1>
            
            <div class="grid grid-cols-1 md:grid-cols-2 gap-8">
                <Card class="p-6">
                    <h2 class="text-xl font-semibold mb-4">"Button Example"</h2>
                    <div class="space-y-4">
                        <Button on_click=move |_| set_count.update(|c| *c += 1)>
                            "Count: " {count}
                        </Button>
                        <Button variant=ButtonVariant::Destructive on_click=move |_| set_count.set(0)>
                            "Reset"
                        </Button>
                    </div>
                </Card>
                
                <Card class="p-6">
                    <h2 class="text-xl font-semibold mb-4">"Input Example"</h2>
                    <div class="space-y-4">
                        <Input
                            value=input_value
                            on_change=move |value| set_input_value.set(value)
                            placeholder="Enter text here"
                        />
                        <p class="text-sm text-gray-600">
                            "You typed: " {input_value}
                        </p>
                    </div>
                </Card>
            </div>
        </div>
    }
}
```

### **Phase 3: Standalone Demo Implementation**

#### **3.1 Main Demo Implementation**
```rust
// File: standalone-demo/src/main.rs
// Replace unimplemented! blocks with actual implementations:

use leptos::prelude::*;
use leptos_shadcn_button::Button;
use leptos_shadcn_input::Input;
use leptos_shadcn_card::Card;

#[component]
pub fn App() -> impl IntoView {
    let (name, set_name) = signal(String::new());
    let (email, set_email) = signal(String::new());
    let (submitted, set_submitted) = signal(false);
    
    let handle_submit = move |_| {
        if !name.get().is_empty() && !email.get().is_empty() {
            set_submitted.set(true);
        }
    };
    
    view! {
        <div class="min-h-screen bg-gray-50 py-12">
            <div class="max-w-md mx-auto">
                <Card class="p-8">
                    <h1 class="text-2xl font-bold text-center mb-8">
                        "Contact Form Demo"
                    </h1>
                    
                    if !submitted.get() {
                        <form class="space-y-6" on:submit=move |ev| {
                            ev.prevent_default();
                            handle_submit(());
                        }>
                            <div>
                                <label class="block text-sm font-medium mb-2">
                                    "Name"
                                </label>
                                <Input
                                    value=name
                                    on_change=move |value| set_name.set(value)
                                    placeholder="Enter your name"
                                    required=true
                                />
                            </div>
                            
                            <div>
                                <label class="block text-sm font-medium mb-2">
                                    "Email"
                                </label>
                                <Input
                                    value=email
                                    on_change=move |value| set_email.set(value)
                                    placeholder="Enter your email"
                                    input_type="email"
                                    required=true
                                />
                            </div>
                            
                            <Button
                                class="w-full"
                                on_click=handle_submit
                            >
                                "Submit"
                            </Button>
                        </form>
                    } else {
                        <div class="text-center">
                            <h2 class="text-xl font-semibold mb-4">
                                "Thank you for your submission!"
                            </h2>
                            <p class="text-gray-600 mb-4">
                                "Name: " {name}
                            </p>
                            <p class="text-gray-600 mb-6">
                                "Email: " {email}
                            </p>
                            <Button
                                variant=ButtonVariant::Outline
                                on_click=move |_| {
                                    set_name.set(String::new());
                                    set_email.set(String::new());
                                    set_submitted.set(false);
                                }
                            >
                                "Submit Another"
                            </Button>
                        </div>
                    }
                </Card>
            </div>
        </div>
    }
}

fn main() {
    leptos::mount_to_body(App)
}
```

## **Implementation Plan**

### **Week 1: Performance Audit**
- [ ] Implement BundleAnalyzer
- [ ] Add bundle analysis types
- [ ] Implement bundle analysis methods
- [ ] Add error handling

### **Week 2: Examples**
- [ ] Implement default example
- [ ] Add interactive examples
- [ ] Implement form examples
- [ ] Add styling examples

### **Week 3: Standalone Demo**
- [ ] Implement main demo
- [ ] Add form functionality
- [ ] Add state management
- [ ] Add styling

## **Success Criteria**

### **Performance Audit**
- [ ] Bundle analysis works
- [ ] Performance metrics are accurate
- [ ] Error handling works
- [ ] Tests pass

### **Examples**
- [ ] All examples work
- [ ] Interactive features work
- [ ] Styling is correct
- [ ] Documentation is clear

### **Standalone Demo**
- [ ] Demo runs successfully
- [ ] Form functionality works
- [ ] State management works
- [ ] Styling is correct

## **Risk Mitigation**

### **High Risk**
- **Performance**: Ensure bundle analysis is accurate
- **Functionality**: Ensure all features work correctly
- **Styling**: Ensure styling doesn't break

### **Medium Risk**
- **Test Coverage**: Maintain comprehensive test coverage
- **Documentation**: Keep documentation up to date

### **Low Risk**
- **Code Style**: Maintain consistent code style
- **Import Issues**: Standardize import patterns

## **Files to Fix**

### **Critical Files**
1. `performance-audit/src/bundle_analysis.rs`
2. `examples/leptos/src/default.rs`
3. `standalone-demo/src/main.rs`

### **Supporting Files**
1. `performance-audit/Cargo.toml`
2. `examples/leptos/Cargo.toml`
3. `standalone-demo/Cargo.toml`

---

**Priority**: 🟡 **P1 - HIGH**
**Estimated Effort**: 3 weeks
**Dependencies**: None
