// Enhanced Plugin Validation Framework
//
// This module provides comprehensive validation capabilities for optimizer plugins,
// including static analysis, runtime validation, performance testing, and
// compatibility checking across different platforms and configurations.

use super::core::*;
use super::template_generator::*;
use crate::error::Result;
use scirs2_core::ndarray::{Array1, Array2, Axis};
use scirs2_core::numeric::Float;
use serde::{Deserialize, Serialize};
use std::collections::{HashMap, VecDeque};
use std::fmt::Debug;
use std::time::{Duration, Instant};

/// Comprehensive plugin validator
#[derive(Debug)]
pub struct EnhancedPluginValidator {
    /// Static analysis engine
    static_analyzer: StaticAnalyzer,
    /// Runtime validator
    runtime_validator: RuntimeValidator,
    /// Performance tester
    performance_tester: PerformanceTester,
    /// Compatibility checker
    compatibility_checker: CompatibilityChecker,
    /// Security validator
    security_validator: SecurityValidator,
    /// Validation configuration
    config: ValidationConfig}

/// Validation configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ValidationConfig {
    /// Enable static analysis
    pub enable_static_analysis: bool,
    /// Enable runtime validation
    pub enable_runtime_validation: bool,
    /// Enable performance testing
    pub enable_performance_testing: bool,
    /// Enable compatibility checking
    pub enable_compatibility_checking: bool,
    /// Enable security validation
    pub enable_security_validation: bool,
    /// Validation timeout (seconds)
    pub timeout_seconds: u64,
    /// Performance test iterations
    pub performance_iterations: usize,
    /// Memory usage limits
    pub memory_limits: MemoryLimits,
    /// Performance thresholds
    pub performance_thresholds: PerformanceThresholds}

/// Memory usage limits
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MemoryLimits {
    /// Maximum memory usage (MB)
    pub max_memory_mb: usize,
    /// Memory leak tolerance (bytes)
    pub leak_tolerance_bytes: usize,
    /// Maximum allocations per step
    pub max_allocations_per_step: usize}

/// Performance thresholds
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PerformanceThresholds {
    /// Maximum step time (microseconds)
    pub max_step_time_us: u64,
    /// Minimum throughput (steps/second)
    pub min_throughput: f64,
    /// Maximum convergence iterations
    pub max_convergence_iterations: usize,
    /// Numerical precision tolerance
    pub numerical_tolerance: f64}

/// Comprehensive validation result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ComprehensiveValidationResult {
    /// Overall validation status
    pub is_valid: bool,
    /// Validation score (0.0 to 1.0)
    pub validation_score: f64,
    /// Static analysis results
    pub static_analysis: Option<StaticAnalysisResult>,
    /// Runtime validation results
    pub runtime_validation: Option<RuntimeValidationResult>,
    /// Performance test results
    pub performance_results: Option<PerformanceTestResults>,
    /// Compatibility check results
    pub compatibility_results: Option<CompatibilityResults>,
    /// Security validation results
    pub security_results: Option<SecurityValidationResult>,
    /// Validation summary
    pub summary: ValidationSummary,
    /// Recommendations
    pub recommendations: Vec<ValidationRecommendation>}

/// Static analysis engine
#[derive(Debug)]
pub struct StaticAnalyzer {
    /// Code quality checkers
    quality_checkers: Vec<Box<dyn QualityChecker>>,
    /// API compliance checkers
    api_checkers: Vec<Box<dyn APIChecker>>,
    /// Documentation validators
    doc_validators: Vec<Box<dyn DocumentationValidator>>}

/// Runtime validator for dynamic testing
#[derive(Debug)]
pub struct RuntimeValidator {
    /// Test cases
    test_cases: Vec<Box<dyn RuntimeTestCase>>,
    /// Edge case generators
    edge_case_generators: Vec<Box<dyn EdgeCaseGenerator>>,
    /// Invariant checkers
    invariant_checkers: Vec<Box<dyn InvariantChecker>>}

/// Performance tester
#[derive(Debug)]
pub struct PerformanceTester {
    /// Benchmark suites
    benchmark_suites: Vec<Box<dyn BenchmarkSuite>>,
    /// Memory profiler
    memory_profiler: MemoryProfiler,
    /// Throughput analyzer
    throughput_analyzer: ThroughputAnalyzer}

/// Enhanced compatibility checker
#[derive(Debug)]
pub struct CompatibilityChecker {
    /// Platform testers
    platform_testers: HashMap<PlatformTarget, Box<dyn PlatformTester>>,
    /// Version compatibility matrix
    version_matrix: VersionCompatibilityMatrix,
    /// Dependency analyzer
    dependency_analyzer: DependencyAnalyzer}

/// Security validator
#[derive(Debug)]
pub struct SecurityValidator {
    /// Vulnerability scanners
    vulnerability_scanners: Vec<Box<dyn VulnerabilityScanner>>,
    /// Dependency security checker
    dependency_security: DependencySecurityChecker,
    /// Safe code analyzer
    safe_code_analyzer: SafeCodeAnalyzer}

/// Static analysis result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct StaticAnalysisResult {
    /// Code quality metrics
    pub code_quality: CodeQualityMetrics,
    /// API compliance issues
    pub api_issues: Vec<APIIssue>,
    /// Documentation coverage
    pub documentation_coverage: f64,
    /// Complexity metrics
    pub complexity_metrics: ComplexityMetrics,
    /// Maintainability index
    pub maintainability_index: f64}

/// Runtime validation result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct RuntimeValidationResult {
    /// Test results
    pub test_results: Vec<RuntimeTestResult>,
    /// Edge case results
    pub edge_case_results: Vec<EdgeCaseResult>,
    /// Invariant violations
    pub invariant_violations: Vec<InvariantViolation>,
    /// Runtime errors
    pub runtime_errors: Vec<RuntimeError>,
    /// Success rate
    pub success_rate: f64}

/// Performance test results
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PerformanceTestResults {
    /// Benchmark results
    pub benchmark_results: Vec<BenchmarkResult>,
    /// Memory usage analysis
    pub memory_analysis: MemoryAnalysis,
    /// Throughput metrics
    pub throughput_metrics: ThroughputMetrics,
    /// Scalability analysis
    pub scalability_analysis: ScalabilityAnalysis,
    /// Performance score
    pub performance_score: f64}

/// Compatibility check results
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CompatibilityResults {
    /// Platform compatibility
    pub platform_compatibility: HashMap<PlatformTarget, PlatformCompatibility>,
    /// Version compatibility
    pub version_compatibility: VersionCompatibilityResult,
    /// Dependency compatibility
    pub dependency_compatibility: DependencyCompatibilityResult,
    /// Overall compatibility score
    pub compatibility_score: f64}

/// Security validation result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SecurityValidationResult {
    /// Vulnerability scan results
    pub vulnerabilities: Vec<SecurityVulnerability>,
    /// Dependency security issues
    pub dependency_security_issues: Vec<DependencySecurityIssue>,
    /// Safe code analysis
    pub safe_code_analysis: SafeCodeAnalysisResult,
    /// Security score
    pub security_score: f64}

/// Validation summary
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ValidationSummary {
    /// Total checks performed
    pub total_checks: usize,
    /// Passed checks
    pub passed_checks: usize,
    /// Failed checks
    pub failed_checks: usize,
    /// Warnings
    pub warnings: usize,
    /// Critical issues
    pub critical_issues: usize,
    /// Validation duration
    pub validation_duration: Duration}

/// Validation recommendation
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ValidationRecommendation {
    /// Recommendation type
    pub recommendation_type: RecommendationType,
    /// Priority level
    pub priority: RecommendationPriority,
    /// Description
    pub description: String,
    /// Suggested actions
    pub suggested_actions: Vec<String>,
    /// Impact assessment
    pub impact: ImpactAssessment}

/// Platform target for testing
#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
pub enum PlatformTarget {
    LinuxX64,
    LinuxArm64,
    MacOSX64,
    MacOSArm64,
    WindowsX64,
    WindowsArm64,
    WebAssembly,
    Custom(String)}

/// Quality checker trait
pub trait QualityChecker: Debug + Send + Sync {
    /// Check code quality
    fn check_quality(&self, plugin: &dyn OptimizerPlugin<f64>) -> QualityCheckResult;
    
    /// Get checker name
    fn name(&self) -> &str;
    
    /// Get quality metrics
    fn metrics(&self) -> Vec<String>;
}

/// API checker trait
pub trait APIChecker: Debug + Send + Sync {
    /// Check API compliance
    fn check_api(&self, plugin: &dyn OptimizerPlugin<f64>) -> APICheckResult;
    
    /// Get checker name
    fn name(&self) -> &str;
    
    /// Get API requirements
    fn requirements(&self) -> Vec<String>;
}

/// Documentation validator trait
pub trait DocumentationValidator: Debug + Send + Sync {
    /// Validate documentation
    fn validate_docs(&self, plugin: &dyn OptimizerPlugin<f64>) -> DocumentationValidationResult;
    
    /// Get validator name
    fn name(&self) -> &str;
    
    /// Get documentation requirements
    fn requirements(&self) -> Vec<String>;
}

/// Runtime test case trait
pub trait RuntimeTestCase: Debug + Send + Sync {
    /// Execute test case
    fn execute(&self, plugin: &mut dyn OptimizerPlugin<f64>) -> RuntimeTestResult;
    
    /// Get test name
    fn name(&self) -> &str;
    
    /// Get test description
    fn description(&self) -> &str;
    
    /// Get test category
    fn category(&self) -> TestCategory;
}

/// Edge case generator trait
pub trait EdgeCaseGenerator: Debug + Send + Sync {
    /// Generate edge cases
    fn generate_edge_cases(&self) -> Vec<EdgeCase>;
    
    /// Get generator name
    fn name(&self) -> &str;
    
    /// Get edge case categories
    fn categories(&self) -> Vec<EdgeCaseCategory>;
}

/// Invariant checker trait
pub trait InvariantChecker: Debug + Send + Sync {
    /// Check invariants
    fn check_invariants(&self, plugin: &dyn OptimizerPlugin<f64>, context: &InvariantContext) -> InvariantCheckResult;
    
    /// Get checker name
    fn name(&self) -> &str;
    
    /// Get invariant descriptions
    fn invariants(&self) -> Vec<String>;
}

/// Vulnerability scanner trait
pub trait VulnerabilityScanner: Debug + Send + Sync {
    /// Scan for vulnerabilities
    fn scan(&self, plugin: &dyn OptimizerPlugin<f64>) -> VulnerabilityScanResult;
    
    /// Get scanner name
    fn name(&self) -> &str;
    
    /// Get vulnerability types checked
    fn vulnerability_types(&self) -> Vec<String>;
}

/// Platform tester trait
pub trait PlatformTester: Debug + Send + Sync {
    /// Test platform compatibility
    fn test_platform(&self, plugin: &dyn OptimizerPlugin<f64>) -> PlatformTestResult;
    
    /// Get platform target
    fn platform(&self) -> PlatformTarget;
    
    /// Get platform requirements
    fn requirements(&self) -> Vec<String>;
}

// Supporting data structures

/// Code quality metrics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CodeQualityMetrics {
    /// Lines of code
    pub lines_of_code: usize,
    /// Cyclomatic complexity
    pub cyclomatic_complexity: f64,
    /// Code duplication percentage
    pub code_duplication: f64,
    /// Test coverage percentage
    pub test_coverage: f64,
    /// Documentation ratio
    pub documentation_ratio: f64}

/// API issue
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct APIIssue {
    /// Issue type
    pub issue_type: APIIssueType,
    /// Issue description
    pub description: String,
    /// Severity
    pub severity: IssueSeverity,
    /// Location
    pub location: String,
    /// Fix suggestion
    pub fix_suggestion: Option<String>}

/// API issue types
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum APIIssueType {
    MissingMethod,
    IncorrectSignature,
    MissingTrait,
    ImproperImplementation,
    PerformanceIssue,
    SafetyIssue}

/// Issue severity levels
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum IssueSeverity {
    Info,
    Warning,
    Error,
    Critical}

/// Complexity metrics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ComplexityMetrics {
    /// Cyclomatic complexity
    pub cyclomatic_complexity: f64,
    /// Cognitive complexity
    pub cognitive_complexity: f64,
    /// Halstead complexity
    pub halstead_complexity: HalsteadMetrics,
    /// Maintainability index
    pub maintainability_index: f64}

/// Halstead complexity metrics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct HalsteadMetrics {
    /// Program length
    pub program_length: usize,
    /// Program vocabulary
    pub vocabulary: usize,
    /// Program volume
    pub volume: f64,
    /// Program difficulty
    pub difficulty: f64,
    /// Programming effort
    pub effort: f64}

/// Memory analysis result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MemoryAnalysis {
    /// Peak memory usage
    pub peak_memory_usage: usize,
    /// Average memory usage
    pub average_memory_usage: usize,
    /// Memory leak detected
    pub memory_leak_detected: bool,
    /// Allocation patterns
    pub allocation_patterns: Vec<AllocationPattern>,
    /// Memory efficiency score
    pub efficiency_score: f64}

/// Allocation pattern
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AllocationPattern {
    /// Pattern type
    pub pattern_type: String,
    /// Frequency
    pub frequency: usize,
    /// Size range
    pub size_range: (usize, usize),
    /// Duration
    pub duration: Duration}

/// Throughput metrics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ThroughputMetrics {
    /// Operations per second
    pub ops_per_second: f64,
    /// Average latency
    pub average_latency: Duration,
    /// 95th percentile latency
    pub p95_latency: Duration,
    /// 99th percentile latency
    pub p99_latency: Duration,
    /// Throughput stability
    pub stability_coefficient: f64}

/// Scalability analysis
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ScalabilityAnalysis {
    /// Scaling behavior
    pub scaling_behavior: ScalingBehavior,
    /// Parameter size vs performance
    pub size_performance_curve: Vec<(usize, f64)>,
    /// Memory scaling
    pub memory_scaling: MemoryScaling,
    /// Recommended limits
    pub recommended_limits: RecommendedLimits}

/// Scaling behavior types
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum ScalingBehavior {
    Linear,
    Logarithmic,
    Quadratic,
    Exponential,
    Constant,
    Unknown}

/// Memory scaling characteristics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MemoryScaling {
    /// Memory complexity order
    pub complexity_order: String,
    /// Memory scaling coefficient
    pub scaling_coefficient: f64,
    /// Base memory usage
    pub base_memory: usize}

/// Recommended operational limits
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct RecommendedLimits {
    /// Maximum parameter count
    pub max_parameters: usize,
    /// Maximum batch size
    pub max_batch_size: usize,
    /// Recommended memory limit
    pub recommended_memory_limit: usize}

impl EnhancedPluginValidator {
    /// Create a new enhanced plugin validator
    pub fn new(config: ValidationConfig) -> Self {
        let static_analyzer = StaticAnalyzer::new();
        let runtime_validator = RuntimeValidator::new();
        let performance_tester = PerformanceTester::new();
        let compatibility_checker = CompatibilityChecker::new();
        let security_validator = SecurityValidator::new();
        
        Self {
            static_analyzer,
            runtime_validator,
            performance_tester,
            compatibility_checker,
            security_validator,
            _config}
    }
    
    /// Perform comprehensive validation
    pub fn validate_plugin(
        &self,
        plugin: &mut dyn OptimizerPlugin<f64>,
    ) -> Result<ComprehensiveValidationResult> {
        let validation_start = Instant::now();
        let mut result = ComprehensiveValidationResult {
            is_valid: true,
            validation_score: 0.0,
            static_analysis: None,
            runtime_validation: None,
            performance_results: None,
            compatibility_results: None,
            security_results: None,
            summary: ValidationSummary {
                total_checks: 0,
                passed_checks: 0,
                failed_checks: 0,
                warnings: 0,
                critical_issues: 0,
                validation_duration: Duration::default()},
            recommendations: Vec::new()};
        
        // Static analysis
        if self.config.enable_static_analysis {
            println!("🔍 Running static analysis...");
            match self.static_analyzer.analyze(plugin) {
                Ok(static_result) => {
                    result.static_analysis = Some(static_result);
                    result.summary.total_checks += 1;
                    result.summary.passed_checks += 1;
                }
                Err(e) => {
                    eprintln!("Static analysis failed: {}", e);
                    result.is_valid = false;
                    result.summary.failed_checks += 1;
                }
            }
        }
        
        // Runtime validation
        if self.config.enable_runtime_validation {
            println!("🏃 Running runtime validation...");
            match self.runtime_validator.validate(plugin) {
                Ok(runtime_result) => {
                    if runtime_result.success_rate < 0.95 {
                        result.is_valid = false;
                        result.summary.critical_issues += 1;
                    }
                    result.runtime_validation = Some(runtime_result);
                    result.summary.total_checks += 1;
                    result.summary.passed_checks += 1;
                }
                Err(e) => {
                    eprintln!("Runtime validation failed: {}", e);
                    result.is_valid = false;
                    result.summary.failed_checks += 1;
                }
            }
        }
        
        // Performance testing
        if self.config.enable_performance_testing {
            println!("⚡ Running performance tests...");
            match self.performance_tester.test_performance(plugin, &self.config.performance_thresholds) {
                Ok(perf_result) => {
                    if perf_result.performance_score < 0.7 {
                        result.summary.warnings += 1;
                    }
                    result.performance_results = Some(perf_result);
                    result.summary.total_checks += 1;
                    result.summary.passed_checks += 1;
                }
                Err(e) => {
                    eprintln!("Performance testing failed: {}", e);
                    result.summary.failed_checks += 1;
                }
            }
        }
        
        // Compatibility checking
        if self.config.enable_compatibility_checking {
            println!("🔗 Running compatibility checks...");
            match self.compatibility_checker.check_compatibility(plugin) {
                Ok(compat_result) => {
                    if compat_result.compatibility_score < 0.8 {
                        result.summary.warnings += 1;
                    }
                    result.compatibility_results = Some(compat_result);
                    result.summary.total_checks += 1;
                    result.summary.passed_checks += 1;
                }
                Err(e) => {
                    eprintln!("Compatibility checking failed: {}", e);
                    result.summary.failed_checks += 1;
                }
            }
        }
        
        // Security validation
        if self.config.enable_security_validation {
            println!("🔒 Running security validation...");
            match self.security_validator.validate_security(plugin) {
                Ok(security_result) => {
                    if !security_result.vulnerabilities.is_empty() {
                        result.summary.critical_issues += security_result.vulnerabilities.len();
                        result.is_valid = false;
                    }
                    result.security_results = Some(security_result);
                    result.summary.total_checks += 1;
                    result.summary.passed_checks += 1;
                }
                Err(e) => {
                    eprintln!("Security validation failed: {}", e);
                    result.is_valid = false;
                    result.summary.failed_checks += 1;
                }
            }
        }
        
        // Calculate overall validation score
        result.validation_score = self.calculate_validation_score(&result);
        
        // Generate recommendations
        result.recommendations = self.generate_recommendations(&result);
        
        // Update summary
        result.summary.validation_duration = validation_start.elapsed();
        
        println!("✅ Validation completed with score: {:.2}", result.validation_score);
        
        Ok(result)
    }
    
    /// Validate plugin template
    pub fn validate_template(&self, template: &PluginTemplate) -> Result<TemplateValidationResult> {
        let mut result = TemplateValidationResult {
            is_valid: true,
            errors: Vec::new(),
            warnings: Vec::new(),
            template_score: 0.0,
            completeness_score: 0.0,
            quality_score: 0.0};
        
        // Validate template structure
        if template.name.is_empty() {
            result.is_valid = false;
            result.errors.push("Template name cannot be empty".to_string());
        }
        
        if template.description.is_empty() {
            result.warnings.push("Template description is empty".to_string());
        }
        
        // Validate parameters
        for (param_name, param) in &template.parameters {
            if param.name.is_empty() {
                result.is_valid = false;
                result.errors.push(format!("Parameter '{}' has empty name", param_name));
            }
            
            if param.description.is_empty() {
                result.warnings.push(format!("Parameter '{}' has no description", param_name));
            }
        }
        
        // Calculate scores
        result.completeness_score = self.calculate_template_completeness(template);
        result.quality_score = self.calculate_template_quality(template);
        result.template_score = (result.completeness_score + result.quality_score) / 2.0;
        
        Ok(result)
    }
    
    /// Calculate overall validation score
    fn calculate_validation_score(&self, result: &ComprehensiveValidationResult) -> f64 {
        let mut score = 1.0;
        let mut weight_sum = 0.0;
        
        // Static analysis weight: 20%
        if let Some(ref static_result) = result.static_analysis {
            let static_score = static_result.maintainability_index / 100.0;
            score += static_score * 0.2;
            weight_sum += 0.2;
        }
        
        // Runtime validation weight: 30%
        if let Some(ref runtime_result) = result.runtime_validation {
            score += runtime_result.success_rate * 0.3;
            weight_sum += 0.3;
        }
        
        // Performance weight: 25%
        if let Some(ref perf_result) = result.performance_results {
            score += perf_result.performance_score * 0.25;
            weight_sum += 0.25;
        }
        
        // Compatibility weight: 15%
        if let Some(ref compat_result) = result.compatibility_results {
            score += compat_result.compatibility_score * 0.15;
            weight_sum += 0.15;
        }
        
        // Security weight: 10%
        if let Some(ref security_result) = result.security_results {
            score += security_result.security_score * 0.1;
            weight_sum += 0.1;
        }
        
        if weight_sum > 0.0 {
            (score - 1.0) / weight_sum
        } else {
            0.0
        }
    }
    
    /// Generate validation recommendations
    fn generate_recommendations(&self, result: &ComprehensiveValidationResult) -> Vec<ValidationRecommendation> {
        let mut recommendations = Vec::new();
        
        // Performance recommendations
        if let Some(ref perf_result) = result.performance_results {
            if perf_result.performance_score < 0.7 {
                recommendations.push(ValidationRecommendation {
                    recommendation_type: RecommendationType::Performance,
                    priority: RecommendationPriority::High,
                    description: "Performance below recommended threshold".to_string(),
                    suggested_actions: vec![
                        "Profile algorithm for bottlenecks".to_string(),
                        "Consider SIMD optimizations".to_string(),
                        "Review memory allocation patterns".to_string(),
                    ],
                    impact: ImpactAssessment {
                        performance_impact: 0.8,
                        compatibility_impact: 0.1,
                        security_impact: 0.0,
                        maintenance_impact: 0.3}});
            }
        }
        
        // Security recommendations
        if let Some(ref security_result) = result.security_results {
            if !security_result.vulnerabilities.is_empty() {
                recommendations.push(ValidationRecommendation {
                    recommendation_type: RecommendationType::Security,
                    priority: RecommendationPriority::Critical,
                    description: "Security vulnerabilities detected".to_string(),
                    suggested_actions: vec![
                        "Review and fix identified vulnerabilities".to_string(),
                        "Update dependencies".to_string(),
                        "Run additional security scans".to_string(),
                    ],
                    impact: ImpactAssessment {
                        performance_impact: 0.0,
                        compatibility_impact: 0.0,
                        security_impact: 1.0,
                        maintenance_impact: 0.5}});
            }
        }
        
        recommendations
    }
    
    /// Calculate template completeness score
    fn calculate_template_completeness(&self, template: &PluginTemplate) -> f64 {
        let mut score = 0.0;
        let mut total_checks = 0.0;
        
        // Check basic metadata
        total_checks += 1.0;
        if !template.name.is_empty() && !template.description.is_empty() {
            score += 1.0;
        }
        
        // Check structure completeness
        total_checks += 1.0;
        if !template.structure.core_files.is_empty() {
            score += 1.0;
        }
        
        // Check parameters
        total_checks += 1.0;
        if !template.parameters.is_empty() {
            score += 1.0;
        }
        
        score / total_checks
    }
    
    /// Calculate template quality score
    fn calculate_template_quality(&self, template: &PluginTemplate) -> f64 {
        let mut score = 0.0;
        let mut total_checks = 0.0;
        
        // Check parameter validation
        total_checks += 1.0;
        let params_with_validation = template.parameters.values()
            .filter(|p| !p.validation.is_empty())
            .count();
        if params_with_validation > 0 {
            score += params_with_validation as f64 / template.parameters.len() as f64;
        }
        
        // Check documentation
        total_checks += 1.0;
        if !template.structure.documentation.is_empty() {
            score += 1.0;
        }
        
        score / total_checks
    }
}

/// Template validation result
#[derive(Debug, Clone)]
pub struct TemplateValidationResult {
    /// Validation success
    pub is_valid: bool,
    /// Validation errors
    pub errors: Vec<String>,
    /// Validation warnings
    pub warnings: Vec<String>,
    /// Overall template score
    pub template_score: f64,
    /// Template completeness score
    pub completeness_score: f64,
    /// Template quality score
    pub quality_score: f64}

/// Recommendation types
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum RecommendationType {
    Performance,
    Security,
    Compatibility,
    CodeQuality,
    Documentation,
    Testing,
    Architecture}

/// Recommendation priority levels
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum RecommendationPriority {
    Low,
    Medium,
    High,
    Critical}

/// Impact assessment
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ImpactAssessment {
    /// Performance impact (0.0 to 1.0)
    pub performance_impact: f64,
    /// Compatibility impact (0.0 to 1.0)
    pub compatibility_impact: f64,
    /// Security impact (0.0 to 1.0)
    pub security_impact: f64,
    /// Maintenance impact (0.0 to 1.0)
    pub maintenance_impact: f64}

// Implementation stubs for the various analyzers and testers
// These would be fully implemented based on specific requirements

impl StaticAnalyzer {
    fn new() -> Self {
        Self {
            quality_checkers: vec![
                Box::new(CyclomaticComplexityChecker),
                Box::new(CodeDuplicationChecker),
            ],
            api_checkers: vec![
                Box::new(TraitImplementationChecker),
                Box::new(MethodSignatureChecker),
            ],
            doc_validators: vec![
                Box::new(DocCoverageValidator),
            ]}
    }
    
    fn analyze(&self, plugin: &dyn OptimizerPlugin<f64>) -> Result<StaticAnalysisResult> {
        // Simplified static analysis
        Ok(StaticAnalysisResult {
            code_quality: CodeQualityMetrics {
                lines_of_code: 500,
                cyclomatic_complexity: 10.0,
                code_duplication: 5.0,
                test_coverage: 85.0,
                documentation_ratio: 0.8},
            api_issues: vec![],
            documentation_coverage: 0.85,
            complexity_metrics: ComplexityMetrics {
                cyclomatic_complexity: 10.0,
                cognitive_complexity: 12.0,
                halstead_complexity: HalsteadMetrics {
                    program_length: 100,
                    vocabulary: 50,
                    volume: 500.0,
                    difficulty: 10.0,
                    effort: 5000.0},
                maintainability_index: 75.0},
            maintainability_index: 75.0})
    }
}

impl RuntimeValidator {
    fn new() -> Self {
        Self {
            test_cases: vec![
                Box::new(BasicFunctionalityTest),
                Box::new(ConvergenceTest),
                Box::new(StateSerializationTest),
            ],
            edge_case_generators: vec![
                Box::new(NumericalEdgeCaseGenerator),
                Box::new(SizeEdgeCaseGenerator),
            ],
            invariant_checkers: vec![
                Box::new(ParameterBoundsChecker),
                Box::new(MonotonicityChecker),
            ]}
    }
    
    fn validate(&self, plugin: &mut dyn OptimizerPlugin<f64>) -> Result<RuntimeValidationResult> {
        let mut test_results = Vec::new();
        let mut success_count = 0;
        
        // Run test cases
        for test_case in &self.test_cases {
            let result = test_case.execute(plugin);
            if result.passed {
                success_count += 1;
            }
            test_results.push(result);
        }
        
        let success_rate = success_count as f64 / test_results.len() as f64;
        
        Ok(RuntimeValidationResult {
            test_results,
            edge_case_results: vec![],
            invariant_violations: vec![],
            runtime_errors: vec![],
            success_rate})
    }
}

impl PerformanceTester {
    fn new() -> Self {
        Self {
            benchmark_suites: vec![],
            memory_profiler: MemoryProfiler::new(),
            throughput_analyzer: ThroughputAnalyzer::new()}
    }
    
    fn test_performance(&self, plugin: &mut dyn OptimizerPlugin<f64>, thresholds: &PerformanceThresholds) -> Result<PerformanceTestResults> {
        // Simplified performance testing
        Ok(PerformanceTestResults {
            benchmark_results: vec![],
            memory_analysis: MemoryAnalysis {
                peak_memory_usage: 1024 * 1024, // 1MB
                average_memory_usage: 512 * 1024, // 512KB
                memory_leak_detected: false,
                allocation_patterns: vec![],
                efficiency_score: 0.9},
            throughput_metrics: ThroughputMetrics {
                ops_per_second: 1000.0,
                average_latency: Duration::from_micros(100),
                p95_latency: Duration::from_micros(200),
                p99_latency: Duration::from_micros(500),
                stability_coefficient: 0.95},
            scalability_analysis: ScalabilityAnalysis {
                scaling_behavior: ScalingBehavior::Linear,
                size_performance_curve: vec![(100, 100.0), (1000, 1000.0), (10000, 10000.0)],
                memory_scaling: MemoryScaling {
                    complexity_order: "O(n)".to_string(),
                    scaling_coefficient: 1.0,
                    base_memory: 1024},
                recommended_limits: RecommendedLimits {
                    max_parameters: 1_000_000,
                    max_batch_size: 1000,
                    recommended_memory_limit: 100 * 1024 * 1024, // 100MB
                }},
            performance_score: 0.85})
    }
}

impl CompatibilityChecker {
    fn new() -> Self {
        Self {
            platform_testers: HashMap::new(),
            version_matrix: VersionCompatibilityMatrix::new(),
            dependency_analyzer: DependencyAnalyzer::new()}
    }
    
    fn check_compatibility(&self, plugin: &dyn OptimizerPlugin<f64>) -> Result<CompatibilityResults> {
        // Simplified compatibility checking
        Ok(CompatibilityResults {
            platform_compatibility: HashMap::new(),
            version_compatibility: VersionCompatibilityResult {
                compatible_versions: vec!["1.0.0".to_string(), "1.1.0".to_string()],
                incompatible_versions: vec![],
                compatibility_matrix: HashMap::new()},
            dependency_compatibility: DependencyCompatibilityResult {
                compatible_dependencies: vec![],
                incompatible_dependencies: vec![],
                dependency_conflicts: vec![]},
            compatibility_score: 0.9})
    }
}

impl SecurityValidator {
    fn new() -> Self {
        Self {
            vulnerability_scanners: vec![],
            dependency_security: DependencySecurityChecker::new(),
            safe_code_analyzer: SafeCodeAnalyzer::new()}
    }
    
    fn validate_security(&self, plugin: &dyn OptimizerPlugin<f64>) -> Result<SecurityValidationResult> {
        // Simplified security validation
        Ok(SecurityValidationResult {
            vulnerabilities: vec![],
            dependency_security_issues: vec![],
            safe_code_analysis: SafeCodeAnalysisResult {
                unsafe_blocks: 0,
                potential_memory_issues: vec![],
                thread_safety_issues: vec![],
                data_race_potential: false},
            security_score: 1.0})
    }
}

// Stub implementations for various checkers and analyzers
// These would be fully implemented in a production system

#[derive(Debug)]
struct CyclomaticComplexityChecker;
impl QualityChecker for CyclomaticComplexityChecker {
    fn check_quality(&self,
        plugin: &dyn OptimizerPlugin<f64>) -> QualityCheckResult {
        QualityCheckResult { score: 0.8, issues: vec![] }
    }
    fn name(&self) -> &str { "CyclomaticComplexity" }
    fn metrics(&self) -> Vec<String> { vec!["complexity".to_string()] }
}

#[derive(Debug)]
struct CodeDuplicationChecker;
impl QualityChecker for CodeDuplicationChecker {
    fn check_quality(&self,
        plugin: &dyn OptimizerPlugin<f64>) -> QualityCheckResult {
        QualityCheckResult { score: 0.9, issues: vec![] }
    }
    fn name(&self) -> &str { "CodeDuplication" }
    fn metrics(&self) -> Vec<String> { vec!["duplication".to_string()] }
}

#[derive(Debug)]
struct TraitImplementationChecker;
impl APIChecker for TraitImplementationChecker {
    fn check_api(&self,
        plugin: &dyn OptimizerPlugin<f64>) -> APICheckResult {
        APICheckResult { compliant: true, issues: vec![] }
    }
    fn name(&self) -> &str { "TraitImplementation" }
    fn requirements(&self) -> Vec<String> { vec!["OptimizerPlugin".to_string()] }
}

#[derive(Debug)]
struct MethodSignatureChecker;
impl APIChecker for MethodSignatureChecker {
    fn check_api(&self,
        plugin: &dyn OptimizerPlugin<f64>) -> APICheckResult {
        APICheckResult { compliant: true, issues: vec![] }
    }
    fn name(&self) -> &str { "MethodSignature" }
    fn requirements(&self) -> Vec<String> { vec![] }
}

#[derive(Debug)]
struct DocCoverageValidator;
impl DocumentationValidator for DocCoverageValidator {
    fn validate_docs(&self,
        plugin: &dyn OptimizerPlugin<f64>) -> DocumentationValidationResult {
        DocumentationValidationResult { coverage: 0.85, missing_docs: vec![] }
    }
    fn name(&self) -> &str { "DocCoverage" }
    fn requirements(&self) -> Vec<String> { vec![] }
}

#[derive(Debug)]
struct BasicFunctionalityTest;
impl RuntimeTestCase for BasicFunctionalityTest {
    fn execute(&self, plugin: &mut dyn OptimizerPlugin<f64>) -> RuntimeTestResult {
        let params = Array1::from_vec(vec![1.0, 2.0, 3.0]);
        let gradients = Array1::from_vec(vec![0.1, 0.2, 0.3]);
        
        match plugin.step(&params, &gradients) {
            Ok(_) => RuntimeTestResult {
                test_name: self.name().to_string(),
                passed: true,
                message: "Basic functionality test passed".to_string(),
                execution_time: Duration::from_millis(1),
                details: HashMap::new()},
            Err(e) => RuntimeTestResult {
                test_name: self.name().to_string(),
                passed: false,
                message: format!("Test failed: {}", e),
                execution_time: Duration::from_millis(1),
                details: HashMap::new()}}
    }
    
    fn name(&self) -> &str { "BasicFunctionality" }
    fn description(&self) -> &str { "Tests basic step functionality" }
    fn category(&self) -> TestCategory { TestCategory::Functionality }
}

#[derive(Debug)]
struct ConvergenceTest;
impl RuntimeTestCase for ConvergenceTest {
    fn execute(&self, plugin: &mut dyn OptimizerPlugin<f64>) -> RuntimeTestResult {
        RuntimeTestResult {
            test_name: self.name().to_string(),
            passed: true,
            message: "Convergence test passed".to_string(),
            execution_time: Duration::from_millis(10),
            details: HashMap::new()}
    }
    
    fn name(&self) -> &str { "Convergence" }
    fn description(&self) -> &str { "Tests convergence properties" }
    fn category(&self) -> TestCategory { TestCategory::Functionality }
}

#[derive(Debug)]
struct StateSerializationTest;
impl RuntimeTestCase for StateSerializationTest {
    fn execute(&self, plugin: &mut dyn OptimizerPlugin<f64>) -> RuntimeTestResult {
        RuntimeTestResult {
            test_name: self.name().to_string(),
            passed: true,
            message: "State serialization test passed".to_string(),
            execution_time: Duration::from_millis(5),
            details: HashMap::new()}
    }
    
    fn name(&self) -> &str { "StateSerialization" }
    fn description(&self) -> &str { "Tests state serialization/deserialization" }
    fn category(&self) -> TestCategory { TestCategory::Functionality }
}

// Additional stub implementations...

/// Runtime test result
#[derive(Debug, Clone)]
pub struct RuntimeTestResult {
    pub test_name: String,
    pub passed: bool,
    pub message: String,
    pub execution_time: Duration,
    pub details: HashMap<String, String>}

/// Quality check result
#[derive(Debug, Clone)]
pub struct QualityCheckResult {
    pub score: f64,
    pub issues: Vec<String>}

/// API check result
#[derive(Debug, Clone)]
pub struct APICheckResult {
    pub compliant: bool,
    pub issues: Vec<String>}

/// Documentation validation result
#[derive(Debug, Clone)]
pub struct DocumentationValidationResult {
    pub coverage: f64,
    pub missing_docs: Vec<String>}

/// Test categories
#[derive(Debug, Clone)]
pub enum TestCategory {
    Functionality,
    Performance,
    Memory}

// More stub implementations for completeness...

#[derive(Debug)]
struct NumericalEdgeCaseGenerator;
impl EdgeCaseGenerator for NumericalEdgeCaseGenerator {
    fn generate_edge_cases(&self) -> Vec<EdgeCase> { vec![] }
    fn name(&self) -> &str { "NumericalEdgeCase" }
    fn categories(&self) -> Vec<EdgeCaseCategory> { vec![] }
}

#[derive(Debug)]
struct SizeEdgeCaseGenerator;
impl EdgeCaseGenerator for SizeEdgeCaseGenerator {
    fn generate_edge_cases(&self) -> Vec<EdgeCase> { vec![] }
    fn name(&self) -> &str { "SizeEdgeCase" }
    fn categories(&self) -> Vec<EdgeCaseCategory> { vec![] }
}

#[derive(Debug)]
struct ParameterBoundsChecker;
impl InvariantChecker for ParameterBoundsChecker {
    fn check_invariants(&self,
        plugin: &dyn OptimizerPlugin<f64>, _context: &InvariantContext) -> InvariantCheckResult {
        InvariantCheckResult { passed: true, violations: vec![] }
    }
    fn name(&self) -> &str { "ParameterBounds" }
    fn invariants(&self) -> Vec<String> { vec![] }
}

#[derive(Debug)]
struct MonotonicityChecker;
impl InvariantChecker for MonotonicityChecker {
    fn check_invariants(&self,
        plugin: &dyn OptimizerPlugin<f64>, _context: &InvariantContext) -> InvariantCheckResult {
        InvariantCheckResult { passed: true, violations: vec![] }
    }
    fn name(&self) -> &str { "Monotonicity" }
    fn invariants(&self) -> Vec<String> { vec![] }
}

// Supporting data structures

#[derive(Debug)]
pub struct EdgeCase;

#[derive(Debug)]
pub enum EdgeCaseCategory {
    Numerical,
    Size,
    Boundary}

#[derive(Debug)]
pub struct EdgeCaseResult;

#[derive(Debug)]
pub struct InvariantViolation;

#[derive(Debug)]
pub struct RuntimeError;

#[derive(Debug)]
pub struct InvariantContext;

#[derive(Debug)]
pub struct InvariantCheckResult {
    pub passed: bool,
    pub violations: Vec<String>}

#[derive(Debug)]
pub struct BenchmarkResult;

#[derive(Debug)]
pub struct MemoryProfiler;
impl MemoryProfiler {
    fn new() -> Self { Self }
}

#[derive(Debug)]
pub struct ThroughputAnalyzer;
impl ThroughputAnalyzer {
    fn new() -> Self { Self }
}

#[derive(Debug)]
pub struct VersionCompatibilityMatrix;
impl VersionCompatibilityMatrix {
    fn new() -> Self { Self }
}

#[derive(Debug)]
pub struct DependencyAnalyzer;
impl DependencyAnalyzer {
    fn new() -> Self { Self }
}

#[derive(Debug)]
pub struct DependencySecurityChecker;
impl DependencySecurityChecker {
    fn new() -> Self { Self }
}

#[derive(Debug)]
pub struct SafeCodeAnalyzer;
impl SafeCodeAnalyzer {
    fn new() -> Self { Self }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PlatformCompatibility;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct VersionCompatibilityResult {
    pub compatible_versions: Vec<String>,
    pub incompatible_versions: Vec<String>,
    pub compatibility_matrix: HashMap<String, bool>}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DependencyCompatibilityResult {
    pub compatible_dependencies: Vec<String>,
    pub incompatible_dependencies: Vec<String>,
    pub dependency_conflicts: Vec<String>}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SecurityVulnerability;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DependencySecurityIssue;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SafeCodeAnalysisResult {
    pub unsafe_blocks: usize,
    pub potential_memory_issues: Vec<String>,
    pub thread_safety_issues: Vec<String>,
    pub data_race_potential: bool}

#[derive(Debug)]
pub struct VulnerabilityScanResult;

#[derive(Debug)]
pub struct PlatformTestResult;

impl Default for ValidationConfig {
    fn default() -> Self {
        Self {
            enable_static_analysis: true,
            enable_runtime_validation: true,
            enable_performance_testing: true,
            enable_compatibility_checking: true,
            enable_security_validation: true,
            timeout_seconds: 300,
            performance_iterations: 100,
            memory_limits: MemoryLimits {
                max_memory_mb: 100,
                leak_tolerance_bytes: 1024,
                max_allocations_per_step: 10},
            performance_thresholds: PerformanceThresholds {
                max_step_time_us: 1000,
                min_throughput: 100.0,
                max_convergence_iterations: 10000,
                numerical_tolerance: 1e-6}}
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::plugin::sdk::*;

    #[test]
    fn test_validator_creation() {
        let config = ValidationConfig::default();
        let validator = EnhancedPluginValidator::new(config);
        
        // Basic creation test
        assert!(true); // Validator created successfully
    }

    #[test]
    fn test_template_validation() {
        let config = ValidationConfig::default();
        let validator = EnhancedPluginValidator::new(config);
        
        let template = PluginTemplate {
            name: "TestTemplate".to_string(),
            description: "Test template description".to_string(),
            category: TemplateCategory::BasicOptimizer,
            complexity: ComplexityLevel::Beginner,
            structure: EnhancedTemplateStructure {
                core_files: vec![],
                test_files: vec![],
                documentation: vec![],
                config_files: vec![],
                cicd_files: vec![],
                example_files: vec![],
                benchmark_files: vec![],
                resource_files: vec![]},
            required_features: vec![],
            parameters: HashMap::new()};
        
        let result = validator.validate_template(&template).unwrap();
        assert!(result.is_valid);
        assert!(result.template_score >= 0.0);
    }

    // Mock plugin for testing
    #[derive(Debug)]
    struct MockValidationPlugin;

    impl OptimizerPlugin<f64> for MockValidationPlugin {
        fn step(&mut self, params: &Array1<f64>, gradients: &Array1<f64>) -> Result<Array1<f64>> {
            Ok(params - gradients * 0.01)
        }
        
        fn name(&self) -> &str { "MockValidationPlugin" }
        fn version(&self) -> &str { "1.0.0" }
        fn plugin_info(&self) -> PluginInfo { PluginInfo::default() }
        fn capabilities(&self) -> PluginCapabilities { PluginCapabilities::default() }
        fn initialize(&mut self, paramshape: &[usize]) -> Result<()> { Ok(()) }
        fn reset(&mut self) -> Result<()> { Ok(()) }
        fn get_config(&self) -> OptimizerConfig { OptimizerConfig::default() }
        fn set_config(&mut self, config: OptimizerConfig) -> Result<()> { Ok(()) }
        fn get_state(&self) -> Result<OptimizerState> { Ok(OptimizerState::default()) }
        fn set_state(&mut self, state: OptimizerState) -> Result<()> { Ok(()) }
        fn clone_plugin(&self) -> Box<dyn OptimizerPlugin<f64>> { Box::new(MockValidationPlugin) }
    }

    #[test]
    fn test_plugin_validation() {
        let config = ValidationConfig::default();
        let validator = EnhancedPluginValidator::new(config);
        
        let mut plugin = MockValidationPlugin;
        let result = validator.validate_plugin(&mut plugin).unwrap();
        
        assert!(result.validation_score >= 0.0);
        assert!(result.validation_score <= 1.0);
    }
}
