# 🔧 Stub Implementation Plan

**Priority**: 🟡 **HIGH**  
**Timeline**: Weeks 2-3  
**Impact**: Completes missing functionality and removes todo! items

## 🚨 Stub Code Inventory

### **Performance Audit Stubs**
```rust
// File: performance-audit/src/bundle_analysis.rs
todo!("Implement component bundle analysis")      // Line 179
todo!("Implement single component analysis")      // Line 185  
todo!("Implement bundle size extraction")         // Line 191
```

### **Potential Additional Stubs**
- Documentation generation stubs
- CLI command implementations
- Test utility stubs
- Integration helper stubs

## 🎯 Implementation Strategy

### **Phase 1: Bundle Analysis Implementation**

#### **1.1 Component Bundle Analysis**
```rust
// Implementation: performance-audit/src/bundle_analysis.rs
impl BundleAnalyzer {
    pub fn analyze_component_bundles(&self, components_path: &Path) -> Result<Vec<ComponentBundleInfo>, BundleAnalysisError> {
        let mut bundle_info = Vec::new();
        
        // Scan component directories
        if let Ok(entries) = fs::read_dir(components_path) {
            for entry in entries.flatten() {
                let path = entry.path();
                if path.is_dir() {
                    if let Some(name) = path.file_name().and_then(|n| n.to_str()) {
                        if name.starts_with("leptos-shadcn-") {
                            let info = self.analyze_single_component(&path, name)?;
                            bundle_info.push(info);
                        }
                    }
                }
            }
        }
        
        Ok(bundle_info)
    }
}
```

#### **1.2 Single Component Analysis**
```rust
impl BundleAnalyzer {
    pub fn analyze_single_component_detailed(&self, component_path: &Path) -> Result<DetailedComponentAnalysis, BundleAnalysisError> {
        let mut analysis = DetailedComponentAnalysis::new();
        
        // Analyze source files
        analysis.source_files = self.analyze_source_files(component_path)?;
        analysis.dependencies = self.analyze_dependencies(component_path)?;
        analysis.exports = self.analyze_exports(component_path)?;
        
        // Calculate metrics
        analysis.total_lines = self.count_total_lines(&analysis.source_files);
        analysis.complexity_score = self.calculate_complexity(&analysis.source_files);
        analysis.bundle_size_estimate = self.estimate_bundle_size(&analysis);
        
        Ok(analysis)
    }
}
```

#### **1.3 Bundle Size Extraction**
```rust
impl BundleAnalyzer {
    pub fn extract_bundle_sizes(&self, components_path: &Path) -> Result<BundleSizeReport, BundleAnalysisError> {
        let mut report = BundleSizeReport::new();
        
        // Get component information
        let components = self.analyze_component_bundles(components_path)?;
        
        for component in components {
            let size_info = BundleSizeInfo {
                component_name: component.component_name.clone(),
                estimated_size: component.bundle_size,
                dependencies_size: self.calculate_dependencies_size(&component.dependencies)?,
                total_size: component.bundle_size + self.calculate_dependencies_size(&component.dependencies)?,
                optimization_potential: self.assess_optimization_potential(&component),
            };
            
            report.components.push(size_info);
        }
        
        // Calculate totals and statistics
        report.total_bundle_size = report.components.iter().map(|c| c.total_size).sum();
        report.average_component_size = if !report.components.is_empty() {
            report.total_bundle_size / report.components.len() as u64
        } else {
            0
        };
        report.largest_component = report.components.iter().max_by_key(|c| c.total_size).cloned();
        
        Ok(report)
    }
}
```

### **Phase 2: Documentation Generation Stubs**

#### **2.1 Doc Generator Implementation**
```rust
// File: packages/doc-automation/src/lib.rs
impl DocGenerator {
    pub fn generate_component_docs(&self, component_path: &Path) -> Result<String, DocGenerationError> {
        let mut docs = String::new();
        
        // Generate component documentation
        docs.push_str(&self.generate_component_header(component_path)?);
        docs.push_str(&self.generate_props_documentation(component_path)?);
        docs.push_str(&self.generate_usage_examples(component_path)?);
        docs.push_str(&self.generate_api_reference(component_path)?);
        
        Ok(docs)
    }
    
    fn generate_component_header(&self, component_path: &Path) -> Result<String, DocGenerationError> {
        let component_name = component_path.file_name()
            .and_then(|n| n.to_str())
            .unwrap_or("Unknown");
            
        Ok(format!("# {}\n\nComponent documentation for {}\n\n", 
            component_name, component_name))
    }
}
```

#### **2.2 API Reference Generation**
```rust
impl DocGenerator {
    fn generate_api_reference(&self, component_path: &Path) -> Result<String, DocGenerationError> {
        let mut api_docs = String::new();
        
        // Parse Rust source files for API information
        let src_path = component_path.join("src");
        if src_path.exists() {
            let api_info = self.parse_component_api(&src_path)?;
            
            api_docs.push_str("## API Reference\n\n");
            api_docs.push_str(&self.format_props_docs(&api_info.props)?);
            api_docs.push_str(&self.format_callbacks_docs(&api_info.callbacks)?);
            api_docs.push_str(&self.format_examples_docs(&api_info.examples)?);
        }
        
        Ok(api_docs)
    }
}
```

### **Phase 3: CLI Command Implementations**

#### **3.1 Performance Monitor Implementation**
```rust
// File: packages/contract-testing/src/bin/performance_monitor.rs
impl PerformanceMonitor {
    pub fn run_monitoring(&self) -> Result<(), MonitoringError> {
        println!("Starting performance monitoring...");
        
        // Initialize monitoring
        self.initialize_monitoring()?;
        
        // Start monitoring loop
        loop {
            let metrics = self.collect_metrics()?;
            self.process_metrics(&metrics)?;
            self.report_metrics(&metrics)?;
            
            // Sleep for monitoring interval
            std::thread::sleep(self.monitoring_interval);
        }
    }
    
    fn collect_metrics(&self) -> Result<PerformanceMetrics, MonitoringError> {
        let mut metrics = PerformanceMetrics::new();
        
        // Collect memory metrics
        metrics.memory_usage = self.get_memory_usage()?;
        metrics.cpu_usage = self.get_cpu_usage()?;
        metrics.bundle_size = self.get_bundle_size()?;
        
        Ok(metrics)
    }
}
```

#### **3.2 TDD Expansion Implementation**
```rust
// File: packages/contract-testing/src/bin/tdd_expansion.rs
impl TDDExpansion {
    pub fn expand_test_coverage(&self) -> Result<(), TDDExpansionError> {
        println!("Expanding TDD test coverage...");
        
        // Analyze current test coverage
        let coverage_report = self.analyze_test_coverage()?;
        
        // Identify gaps
        let gaps = self.identify_coverage_gaps(&coverage_report)?;
        
        // Generate additional tests
        for gap in gaps {
            self.generate_tests_for_gap(&gap)?;
        }
        
        println!("TDD expansion completed successfully");
        Ok(())
    }
}
```

## 📋 Implementation Checklist

### **Week 2: Bundle Analysis**

#### **Day 1-2: Core Bundle Analysis**
- [ ] Implement `analyze_component_bundles` method
- [ ] Add `ComponentBundleInfo` struct
- [ ] Test bundle analysis functionality
- [ ] Add error handling

#### **Day 3-4: Single Component Analysis**
- [ ] Implement `analyze_single_component_detailed` method
- [ ] Add source file analysis
- [ ] Add dependency analysis
- [ ] Test detailed analysis

#### **Day 5: Bundle Size Extraction**
- [ ] Implement `extract_bundle_sizes` method
- [ ] Add size calculation logic
- [ ] Add optimization assessment
- [ ] Test size reporting

### **Week 3: Documentation and CLI**

#### **Day 6-7: Documentation Generation**
- [ ] Implement doc generator stubs
- [ ] Add API reference generation
- [ ] Add usage example generation
- [ ] Test documentation output

#### **Day 8-9: CLI Implementations**
- [ ] Implement performance monitor
- [ ] Implement TDD expansion
- [ ] Add monitoring functionality
- [ ] Test CLI commands

#### **Day 10: Integration and Testing**
- [ ] Integrate all implementations
- [ ] Add comprehensive tests
- [ ] Test end-to-end functionality
- [ ] Verify performance

## 🧪 Testing Strategy

### **Unit Tests for Stub Implementations**
```rust
#[cfg(test)]
mod stub_implementation_tests {
    use super::*;
    
    #[test]
    fn test_bundle_analysis_implementation() {
        let analyzer = BundleAnalyzer::new();
        let result = analyzer.analyze_component_bundles(Path::new("packages/leptos"));
        assert!(result.is_ok());
        assert!(!result.unwrap().is_empty());
    }
    
    #[test]
    fn test_doc_generation_implementation() {
        let generator = DocGenerator::new();
        let result = generator.generate_component_docs(Path::new("packages/leptos/button"));
        assert!(result.is_ok());
        assert!(!result.unwrap().is_empty());
    }
    
    #[test]
    fn test_performance_monitoring_implementation() {
        let monitor = PerformanceMonitor::new();
        let result = monitor.collect_metrics();
        assert!(result.is_ok());
    }
}
```

### **Integration Tests**
```bash
# Test bundle analysis:
cargo run --package leptos-shadcn-performance-audit --bin performance-audit -- bundle

