quantrs2-device 0.1.3

//! Implementation blocks for simulator comparison types.

use std::collections::HashMap;
use std::sync::{Arc, RwLock};
use std::time::{Duration, Instant, SystemTime};

use crate::{DeviceError, DeviceResult};

use super::types::*;

impl Default for ComparisonConfig {
    fn default() -> Self {
        Self {
            auto_benchmarking: true,
            benchmark_frequency: Duration::from_secs(3600), // 1 hour
            enable_performance_tracking: true,
            enable_ml_recommendations: true,
            max_benchmark_time: Duration::from_secs(300), // 5 minutes
            benchmark_configs: vec![BenchmarkConfig::default()],
            comparison_criteria: ComparisonCriteria::default(),
            resource_monitoring: ResourceMonitoringConfig {
                monitor_cpu: true,
                monitor_memory: true,
                monitor_disk: true,
                monitor_network: false,
                monitor_gpu: true,
                monitoring_frequency: Duration::from_secs(1),
            },
            reporting_config: ReportingConfig {
                output_formats: vec![OutputFormat::JSON, OutputFormat::CSV],
                detail_level: ReportDetailLevel::Standard,
                include_charts: true,
                export_raw_data: false,
                comparison_tables: true,
            },
        }
    }
}

impl Default for ComparisonCriteria {
    fn default() -> Self {
        Self {
            speed_weight: 0.3,
            accuracy_weight: 0.25,
            memory_weight: 0.15,
            scalability_weight: 0.15,
            features_weight: 0.1,
            stability_weight: 0.05,
            min_accuracy: 0.95,
            max_memory_usage: 16384.0, // 16 GB
            required_features: vec![
                SimulatorFeature::StateVectorSimulation,
                SimulatorFeature::NoiseModeling,
            ],
            preferred_types: vec![SimulatorType::StateVector, SimulatorType::DensityMatrix],
        }
    }
}

// BenchmarkConfig is defined in types.rs

impl SimulatorComparisonFramework {
    /// Create a new simulator comparison framework
    pub fn new(config: ComparisonConfig) -> Self {
        Self {
            config,
            simulators: Arc::new(RwLock::new(HashMap::new())),
            benchmark_suite: Arc::new(RwLock::new(BenchmarkSuite::new())),
            results_cache: Arc::new(RwLock::new(HashMap::new())),
            analytics: Arc::new(RwLock::new(PerformanceAnalytics::new())),
            recommendation_engine: Arc::new(RwLock::new(RecommendationEngine::new())),
            executor: Arc::new(RwLock::new(BenchmarkExecutor::new())),
        }
    }

    /// Register a simulator for comparison
    pub fn register_simulator(&self, profile: SimulatorProfile) -> DeviceResult<()> {
        let mut simulators = self.simulators.write().unwrap_or_else(|e| e.into_inner());
        simulators.insert(profile.simulator_id.clone(), profile);
        Ok(())
    }

    /// Run comprehensive comparison
    pub async fn run_comparison(
        &self,
        simulator_ids: Vec<String>,
    ) -> DeviceResult<ComparisonResult> {
        // Implementation would include:
        // 1. Validate simulator registrations
        // 2. Execute benchmark suite
        // 3. Collect and analyze results
        // 4. Generate recommendations
        // 5. Perform statistical analysis

        // Simplified implementation for now
        Ok(ComparisonResult {
            timestamp: SystemTime::now(),
            simulators: simulator_ids,
            overall_rankings: vec![],
            category_rankings: HashMap::new(),
            detailed_metrics: HashMap::new(),
            performance_analysis: PerformanceAnalysis {
                best_performers: HashMap::new(),
                trends: HashMap::new(),
                correlations: HashMap::new(),
                outliers: vec![],
                scaling_analysis: ScalingAnalysis {
                    qubit_scaling: HashMap::new(),
                    depth_scaling: HashMap::new(),
                    memory_scaling: HashMap::new(),
                    predictions: HashMap::new(),
                },
            },
            recommendations: vec![],
            statistical_analysis: StatisticalAnalysis {
                anova_results: HashMap::new(),
                correlationmatrix: HashMap::new(),
                significance_tests: HashMap::new(),
                effect_sizes: HashMap::new(),
                confidence_intervals: HashMap::new(),
            },
        })
    }

    /// Get recommendations for specific use case
    pub async fn get_recommendations(
        &self,
        context: RecommendationContext,
    ) -> DeviceResult<Vec<Recommendation>> {
        let engine = self
            .recommendation_engine
            .read()
            .unwrap_or_else(|e| e.into_inner());
        engine.get_recommendations(&context)
    }

    /// Get simulator rankings
    pub fn get_rankings(&self, criteria: Option<ComparisonCriteria>) -> Vec<SimulatorRanking> {
        // Implementation would rank simulators based on criteria
        vec![]
    }

    /// Export comparison results
    pub fn export_results(
        &self,
        result: &ComparisonResult,
        format: OutputFormat,
        path: &str,
    ) -> DeviceResult<()> {
        // Implementation would export results in specified format
        Ok(())
    }
}

impl BenchmarkSuite {
    pub fn new() -> Self {
        Self {
            benchmarks: vec![],
            config: BenchmarkSuiteConfig {
                parallel_execution: true,
                resource_monitoring: true,
                detailed_logging: true,
                result_caching: true,
                reference_comparison: true,
            },
            reference_results: HashMap::new(),
        }
    }
}

impl PerformanceAnalytics {
    pub fn new() -> Self {
        Self {
            historical_data: vec![],
            trends: HashMap::new(),
            prediction_models: HashMap::new(),
            anomaly_detector: Box::new(SimpleAnomalyDetector::new()),
        }
    }
}

impl RecommendationEngine {
    pub fn new() -> Self {
        Self {
            feature_extractors: vec![],
            models: HashMap::new(),
            training_data: vec![],
            model_metrics: HashMap::new(),
        }
    }

    pub fn get_recommendations(
        &self,
        context: &RecommendationContext,
    ) -> DeviceResult<Vec<Recommendation>> {
        // Simplified implementation
        Ok(vec![Recommendation {
            recommendation_type: RecommendationType::BestOverall,
            simulator_id: "default_simulator".to_string(),
            use_case: "General purpose quantum simulation".to_string(),
            confidence: 0.8,
            reasoning: "Best balance of performance and accuracy".to_string(),
            alternatives: vec!["alternative_simulator".to_string()],
        }])
    }
}

impl BenchmarkExecutor {
    pub fn new() -> Self {
        Self {
            config: ExecutorConfig {
                max_parallel: 4,
                benchmark_timeout: Duration::from_secs(300),
                retry_on_failure: true,
                max_retries: 3,
                isolation_mode: IsolationMode::Process,
            },
            resource_monitor: ResourceMonitor::new(),
            result_collector: ResultCollector::new(),
            execution_pool: None,
        }
    }
}

impl ResourceMonitor {
    pub fn new() -> Self {
        Self {
            monitoring_channels: vec![],
            current_measurements: Arc::new(RwLock::new(ResourceMeasurements {
                cpu_usage: 0.0,
                memory_usage: 0.0,
                gpu_usage: None,
                disk_io_rate: 0.0,
                network_io_rate: 0.0,
                temperature: None,
            })),
            historical_measurements: vec![],
        }
    }
}

impl ResultCollector {
    pub fn new() -> Self {
        Self {
            results: Arc::new(RwLock::new(HashMap::new())),
            processing_pipeline: vec![],
            export_handlers: HashMap::new(),
        }
    }
}

/// Simple anomaly detector implementation
#[derive(Debug)]
pub struct SimpleAnomalyDetector {
    threshold: f64,
}

impl SimpleAnomalyDetector {
    pub fn new() -> Self {
        Self { threshold: 2.0 }
    }
}

impl AnomalyDetector for SimpleAnomalyDetector {
    fn detect_anomalies(&self, data: &[f64]) -> Vec<usize> {
        if data.len() < 3 {
            return vec![];
        }

        let mean = data.iter().sum::<f64>() / data.len() as f64;
        let variance =
            data.iter().map(|x| (x - mean).powi(2)).sum::<f64>() / (data.len() - 1) as f64;
        let std_dev = variance.sqrt();

        data.iter()
            .enumerate()
            .filter_map(|(i, &value)| {
                if (value - mean).abs() > self.threshold * std_dev {
                    Some(i)
                } else {
                    None
                }
            })
            .collect()
    }

    fn update(&mut self, _data: &[f64]) {
        // Simple implementation - could be enhanced with adaptive thresholding
    }

    fn threshold(&self) -> f64 {
        self.threshold
    }
}

/// Create a default simulator comparison framework
pub fn create_simulator_comparison_framework() -> SimulatorComparisonFramework {
    SimulatorComparisonFramework::new(ComparisonConfig::default())
}

/// Create a high-performance comparison configuration
pub fn create_high_performance_comparison_config() -> ComparisonConfig {
    ComparisonConfig {
        auto_benchmarking: true,
        benchmark_frequency: Duration::from_secs(1800), // 30 minutes
        enable_performance_tracking: true,
        enable_ml_recommendations: true,
        max_benchmark_time: Duration::from_secs(600), // 10 minutes
        benchmark_configs: vec![
            BenchmarkConfig {
                name: "Performance Suite".to_string(),
                enabled: true,
            },
            BenchmarkConfig {
                name: "Accuracy Suite".to_string(),
                enabled: true,
            },
            BenchmarkConfig {
                name: "Scalability Suite".to_string(),
                enabled: true,
            },
        ],
        comparison_criteria: ComparisonCriteria {
            speed_weight: 0.4,
            accuracy_weight: 0.3,
            memory_weight: 0.1,
            scalability_weight: 0.1,
            features_weight: 0.05,
            stability_weight: 0.05,
            min_accuracy: 0.99,
            max_memory_usage: 32768.0, // 32 GB
            required_features: vec![
                SimulatorFeature::StateVectorSimulation,
                SimulatorFeature::DensityMatrixSimulation,
                SimulatorFeature::NoiseModeling,
                SimulatorFeature::ErrorCorrection,
                SimulatorFeature::GPUAcceleration,
            ],
            preferred_types: vec![
                SimulatorType::StateVector,
                SimulatorType::DensityMatrix,
                SimulatorType::TensorNetwork,
            ],
        },
        resource_monitoring: ResourceMonitoringConfig {
            monitor_cpu: true,
            monitor_memory: true,
            monitor_disk: true,
            monitor_network: true,
            monitor_gpu: true,
            monitoring_frequency: Duration::from_millis(500),
        },
        reporting_config: ReportingConfig {
            output_formats: vec![OutputFormat::JSON, OutputFormat::HDF5, OutputFormat::CSV],
            detail_level: ReportDetailLevel::Comprehensive,
            include_charts: true,
            export_raw_data: true,
            comparison_tables: true,
        },
    }
}

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

    #[test]
    fn test_framework_creation() {
        let framework = create_simulator_comparison_framework();
        assert!(framework
            .simulators
            .read()
            .expect("RwLock should not be poisoned")
            .is_empty());
    }

    #[test]
    fn test_simulator_registration() {
        let framework = create_simulator_comparison_framework();

        let simulator = SimulatorProfile {
            simulator_id: "test_simulator".to_string(),
            name: "Test Simulator".to_string(),
            version: "1.0.0".to_string(),
            simulator_type: SimulatorType::StateVector,
            features: vec![SimulatorFeature::StateVectorSimulation],
            specifications: SimulatorSpecs {
                max_qubits: 20,
                max_circuit_depth: 1000,
                supported_gates: vec!["H".to_string(), "CNOT".to_string()],
                precision: 64,
                memory_architecture: MemoryArchitecture::SingleNode,
                parallelization: ParallelizationSupport {
                    threading: true,
                    multiprocessing: false,
                    gpu_acceleration: false,
                    distributed: false,
                    vectorization: true,
                },
                hardware_acceleration: vec![HardwareAcceleration::CPU],
            },
            capabilities: SimulatorCapabilities {
                noise_modeling: NoiseModelingCapabilities {
                    noise_models: vec![NoiseModel::Depolarizing],
                    custom_noise: false,
                    correlated_noise: false,
                    time_dependent_noise: false,
                    device_noise_profiles: false,
                },
                measurement_capabilities: MeasurementCapabilities {
                    computational_basis: true,
                    pauli_measurements: false,
                    povm_measurements: false,
                    weak_measurements: false,
                    mid_circuit_measurements: false,
                    conditional_operations: false,
                },
                optimization_capabilities: OptimizationCapabilities {
                    circuit_optimization: true,
                    memory_optimization: false,
                    execution_optimization: true,
                    parallel_optimization: false,
                    custom_algorithms: vec![],
                },
                analysis_capabilities: AnalysisCapabilities {
                    state_analysis: true,
                    entanglement_analysis: false,
                    fidelity_calculations: true,
                    process_tomography: false,
                    statistical_analysis: false,
                    visualization: false,
                },
                export_capabilities: ExportCapabilities {
                    output_formats: vec![OutputFormat::JSON],
                    data_streaming: false,
                    realtime_export: false,
                    compression: false,
                },
            },
            performance_profile: PerformanceProfile {
                speed_profile: SpeedProfile {
                    initialization_time: Duration::from_millis(100),
                    gate_execution_rate: 1000.0,
                    compilation_time: Duration::from_millis(50),
                    measurement_time: Duration::from_millis(10),
                    time_complexity: ComplexityScaling::Exponential,
                },
                memory_profile: MemoryProfile {
                    base_memory: 100.0,
                    memory_per_qubit: 64.0,
                    peak_memory: 2048.0,
                    memory_complexity: ComplexityScaling::Exponential,
                    efficiency_rating: 0.8,
                },
                accuracy_profile: AccuracyProfile {
                    numerical_precision: 1e-15,
                    exact_fidelity: 0.999,
                    error_accumulation: 1e-12,
                    depth_accuracy_scaling: ComplexityScaling::Linear,
                    consistency_score: 0.95,
                },
                scalability_profile: ScalabilityProfile {
                    qubit_scaling: ComplexityScaling::Exponential,
                    depth_scaling: ComplexityScaling::Linear,
                    parallel_efficiency: 0.7,
                    max_practical_qubits: 20,
                    resource_efficiency: 0.8,
                },
                stability_metrics: StabilityMetrics {
                    crash_rate: 0.01,
                    result_consistency: 0.99,
                    error_handling: 0.9,
                    memory_leak_rate: 0.0,
                    long_run_stability: 0.95,
                },
            },
            resource_requirements: ResourceRequirements {
                min_cpu_cores: 1,
                min_ram_gb: 2.0,
                min_disk_gb: 1.0,
                gpu_requirements: None,
                network_requirements: None,
                os_requirements: vec!["Linux".to_string(), "macOS".to_string()],
            },
            configuration_options: ConfigurationOptions {
                precision_levels: vec![32, 64],
                optimization_levels: vec!["none".to_string(), "basic".to_string()],
                memory_options: vec!["standard".to_string()],
                parallel_options: vec!["single".to_string()],
                custom_parameters: HashMap::new(),
            },
            integration_interface: IntegrationInterface {
                api_type: APIType::Library,
                connection_params: ConnectionParameters {
                    endpoint: None,
                    port: None,
                    protocol_version: "1.0".to_string(),
                    timeout: Duration::from_secs(30),
                    ssl_required: false,
                },
                auth_requirements: AuthenticationSpec {
                    auth_method: AuthMethod::None,
                    required_credentials: vec![],
                    token_validity: None,
                    refresh_mechanism: false,
                },
                data_formats: DataFormatSpec {
                    input_formats: vec![DataFormat::QASM],
                    output_formats: vec![DataFormat::JSON],
                    streaming_support: false,
                    compression_options: vec![],
                },
                error_handling: ErrorHandlingSpec {
                    error_format: ErrorFormat::Standard,
                    retry_support: false,
                    recovery_mechanisms: vec![],
                    debugging_support: false,
                },
            },
        };

        let result = framework.register_simulator(simulator);
        assert!(result.is_ok());
        assert_eq!(
            framework
                .simulators
                .read()
                .expect("RwLock should not be poisoned")
                .len(),
            1
        );
    }

    #[test]
    fn test_high_performance_config() {
        let config = create_high_performance_comparison_config();
        assert_eq!(config.comparison_criteria.speed_weight, 0.4);
        assert!(config.enable_ml_recommendations);
        assert_eq!(
            config.reporting_config.detail_level,
            ReportDetailLevel::Comprehensive
        );
    }

    #[tokio::test]
    async fn test_comparison_execution() {
        let framework = create_simulator_comparison_framework();
        let result = framework
            .run_comparison(vec!["test_simulator".to_string()])
            .await;
        assert!(result.is_ok());
    }
}