// Memory Profiling: SciRS2 and External Systems Integration
//
// This module provides comprehensive integration capabilities for the ToRSh memory profiling
// system with SciRS2 ecosystem and external monitoring/analytics systems. It includes
// data export/import, real-time monitoring integration, and extensible plugin architecture.

use std::collections::HashMap;
use std::time::{Instant, Duration, SystemTime};
use std::sync::{Arc, Mutex};
use scirs2_core::error::{CoreError, Result};
use scirs2_core::metrics::{MetricRegistry, Counter, Gauge, Histogram, Timer};
use scirs2_core::observability::{audit, tracing};
use serde::{Serialize, Deserialize};

use crate::memory_profiling::{
    core::{MemoryStatistics, AllocationContext, PerformanceHint},
    pressure::{MemorySnapshot, MemoryPressureEvent, BandwidthUtilization},
    patterns::{AccessPattern, OptimizationRecommendation, AccessPatternMetrics},
    analytics::{AnalyticsReport, TrendAnalysis, AnomalyDetection, PerformanceBaseline},
    fragmentation::{FragmentationAnalysis, DefragmentationResult},
};

/// Configuration for SciRS2 integration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SciRS2IntegrationConfig {
    pub enable_metrics_export: bool,
    pub metrics_endpoint: String,
    pub metrics_interval: Duration,
    pub enable_tracing: bool,
    pub trace_sampling_rate: f64,
    pub enable_audit_logging: bool,
    pub audit_retention_days: u32,
    pub performance_baseline_sync: bool,
    pub shared_memory_profiling: bool,
}

impl Default for SciRS2IntegrationConfig {
    fn default() -> Self {
        Self {
            enable_metrics_export: true,
            metrics_endpoint: "http://localhost:9090".to_string(),
            metrics_interval: Duration::from_secs(60),
            enable_tracing: true,
            trace_sampling_rate: 0.1,
            enable_audit_logging: true,
            audit_retention_days: 30,
            performance_baseline_sync: true,
            shared_memory_profiling: false,
        }
    }
}

/// External system integration configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ExternalIntegrationConfig {
    pub monitoring_systems: Vec<MonitoringSystemConfig>,
    pub data_exporters: Vec<DataExporterConfig>,
    pub alerting_systems: Vec<AlertingSystemConfig>,
    pub database_connectors: Vec<DatabaseConnectorConfig>,
    pub api_endpoints: Vec<ApiEndpointConfig>,
}

impl Default for ExternalIntegrationConfig {
    fn default() -> Self {
        Self {
            monitoring_systems: vec![
                MonitoringSystemConfig {
                    system_type: MonitoringSystemType::Prometheus,
                    endpoint: "http://localhost:9090".to_string(),
                    credentials: None,
                    enabled: true,
                    export_interval: Duration::from_secs(30),
                    metric_prefix: "torsh_memory_".to_string(),
                },
            ],
            data_exporters: vec![],
            alerting_systems: vec![],
            database_connectors: vec![],
            api_endpoints: vec![],
        }
    }
}

/// Configuration for monitoring system integration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MonitoringSystemConfig {
    pub system_type: MonitoringSystemType,
    pub endpoint: String,
    pub credentials: Option<SystemCredentials>,
    pub enabled: bool,
    pub export_interval: Duration,
    pub metric_prefix: String,
}

/// Types of supported monitoring systems
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum MonitoringSystemType {
    Prometheus,
    Grafana,
    DataDog,
    NewRelic,
    CloudWatch,
    Custom(String),
}

/// Configuration for data exporters
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DataExporterConfig {
    pub exporter_type: DataExporterType,
    pub destination: String,
    pub format: ExportFormat,
    pub compression: CompressionType,
    pub encryption: Option<EncryptionConfig>,
    pub batch_size: usize,
    pub export_frequency: Duration,
}

/// Types of data exporters
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum DataExporterType {
    FileSystem,
    S3,
    GCS,
    Azure,
    Http,
    Database,
    MessageQueue,
}

/// Export data formats
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum ExportFormat {
    Json,
    Csv,
    Parquet,
    Avro,
    ProtocolBuffers,
    MessagePack,
}

/// Compression types for data export
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum CompressionType {
    None,
    Gzip,
    Zstd,
    Lz4,
    Brotli,
}

/// Encryption configuration for data export
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EncryptionConfig {
    pub algorithm: EncryptionAlgorithm,
    pub key_source: KeySource,
    pub key_rotation_days: u32,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum EncryptionAlgorithm {
    Aes256Gcm,
    ChaCha20Poly1305,
    Aes256Cbc,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum KeySource {
    Environment,
    KeyVault,
    File,
    Hardware,
}

/// Alerting system configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AlertingSystemConfig {
    pub system_type: AlertingSystemType,
    pub endpoint: String,
    pub credentials: Option<SystemCredentials>,
    pub alert_rules: Vec<AlertRule>,
    pub notification_channels: Vec<NotificationChannel>,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum AlertingSystemType {
    PagerDuty,
    Slack,
    Email,
    Webhook,
    Custom(String),
}

/// Alert rule definition
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AlertRule {
    pub name: String,
    pub condition: AlertCondition,
    pub severity: AlertSeverity,
    pub cooldown: Duration,
    pub message_template: String,
}

/// Alert condition specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AlertCondition {
    pub metric: String,
    pub operator: ComparisonOperator,
    pub threshold: f64,
    pub evaluation_period: Duration,
    pub consecutive_breaches: u32,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum ComparisonOperator {
    GreaterThan,
    LessThan,
    Equal,
    NotEqual,
    GreaterOrEqual,
    LessOrEqual,
}

#[derive(Debug, Clone, PartialEq, PartialOrd, Serialize, Deserialize)]
pub enum AlertSeverity {
    Critical,
    High,
    Medium,
    Low,
    Info,
}

/// Notification channel configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct NotificationChannel {
    pub channel_type: NotificationChannelType,
    pub destination: String,
    pub severity_filter: Option<AlertSeverity>,
    pub rate_limit: Option<Duration>,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum NotificationChannelType {
    Email,
    Slack,
    Webhook,
    SMS,
    PagerDuty,
}

/// Database connector configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DatabaseConnectorConfig {
    pub database_type: DatabaseType,
    pub connection_string: String,
    pub credentials: SystemCredentials,
    pub schema: String,
    pub table_prefix: String,
    pub batch_size: usize,
    pub connection_pool_size: usize,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum DatabaseType {
    PostgreSQL,
    MySQL,
    SQLite,
    ClickHouse,
    InfluxDB,
    TimescaleDB,
    MongoDB,
}

/// API endpoint configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ApiEndpointConfig {
    pub endpoint_type: ApiEndpointType,
    pub bind_address: String,
    pub port: u16,
    pub authentication: Option<AuthenticationConfig>,
    pub rate_limiting: Option<RateLimitConfig>,
    pub cors_config: Option<CorsConfig>,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum ApiEndpointType {
    Rest,
    GraphQL,
    gRPC,
    WebSocket,
}

/// Authentication configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AuthenticationConfig {
    pub auth_type: AuthenticationType,
    pub secret: String,
    pub token_expiry: Duration,
    pub refresh_enabled: bool,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum AuthenticationType {
    JWT,
    ApiKey,
    OAuth2,
    BasicAuth,
}

/// Rate limiting configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct RateLimitConfig {
    pub requests_per_minute: u32,
    pub burst_limit: u32,
    pub per_client_limit: bool,
}

/// CORS configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CorsConfig {
    pub allowed_origins: Vec<String>,
    pub allowed_methods: Vec<String>,
    pub allowed_headers: Vec<String>,
    pub max_age: Duration,
}

/// System credentials for external integrations
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SystemCredentials {
    pub username: Option<String>,
    pub password: Option<String>,
    pub api_key: Option<String>,
    pub token: Option<String>,
    pub certificate: Option<String>,
}

/// Comprehensive profiling data for export
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ProfilingDataExport {
    pub timestamp: SystemTime,
    pub session_id: String,
    pub version: String,
    pub metadata: ExportMetadata,
    pub statistics: MemoryStatistics,
    pub snapshots: Vec<MemorySnapshot>,
    pub access_patterns: Vec<AccessPattern>,
    pub optimization_recommendations: Vec<OptimizationRecommendation>,
    pub fragmentation_analysis: Option<FragmentationAnalysis>,
    pub trend_analyses: Vec<TrendAnalysis>,
    pub anomalies: Vec<AnomalyDetection>,
    pub performance_baselines: Vec<PerformanceBaseline>,
}

/// Metadata for exported data
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ExportMetadata {
    pub framework_version: String,
    pub export_format_version: String,
    pub compression_used: CompressionType,
    pub encryption_used: bool,
    pub data_points: usize,
    pub time_range: TimeRange,
    pub export_filters: Vec<String>,
    pub checksum: Option<String>,
}

/// Time range specification
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TimeRange {
    pub start: SystemTime,
    pub end: SystemTime,
    pub duration: Duration,
}

/// SciRS2 metrics integration
pub struct SciRS2MetricsIntegration {
    config: SciRS2IntegrationConfig,
    metric_registry: Arc<MetricRegistry>,
    counters: HashMap<String, Counter>,
    gauges: HashMap<String, Gauge>,
    histograms: HashMap<String, Histogram>,
    timers: HashMap<String, Timer>,
    last_export: Instant,
}

impl SciRS2MetricsIntegration {
    pub fn new(config: SciRS2IntegrationConfig) -> Result<Self> {
        let metric_registry = Arc::new(MetricRegistry::new("torsh_memory_profiling")?);

        let mut integration = Self {
            config,
            metric_registry,
            counters: HashMap::new(),
            gauges: HashMap::new(),
            histograms: HashMap::new(),
            timers: HashMap::new(),
            last_export: Instant::now(),
        };

        integration.initialize_metrics()?;
        Ok(integration)
    }

    fn initialize_metrics(&mut self) -> Result<()> {
        // Initialize core memory metrics
        self.counters.insert("allocations_total".to_string(),
            self.metric_registry.counter("allocations_total", "Total number of memory allocations")?);

        self.counters.insert("deallocations_total".to_string(),
            self.metric_registry.counter("deallocations_total", "Total number of memory deallocations")?);

        self.gauges.insert("memory_usage_bytes".to_string(),
            self.metric_registry.gauge("memory_usage_bytes", "Current memory usage in bytes")?);

        self.gauges.insert("fragmentation_index".to_string(),
            self.metric_registry.gauge("fragmentation_index", "Current memory fragmentation index")?);

        self.histograms.insert("allocation_size_bytes".to_string(),
            self.metric_registry.histogram("allocation_size_bytes", "Distribution of allocation sizes")?);

        self.timers.insert("allocation_time".to_string(),
            self.metric_registry.timer("allocation_time", "Time taken for memory allocations")?);

        Ok(())
    }

    pub fn record_statistics(&mut self, stats: &MemoryStatistics) -> Result<()> {
        // Update counters
        self.counters.get_mut("allocations_total")
            .expect("allocations_total counter should be initialized")
            .add(stats.total_allocations as u64);

        self.counters.get_mut("deallocations_total")
            .expect("deallocations_total counter should be initialized")
            .add(stats.total_deallocations as u64);

        // Update gauges
        self.gauges.get_mut("memory_usage_bytes")
            .expect("memory_usage_bytes gauge should be initialized")
            .set(stats.current_memory_usage as f64);

        self.gauges.get_mut("fragmentation_index")
            .expect("fragmentation_index gauge should be initialized")
            .set(stats.fragmentation_index);

        // Record histograms would require additional data
        // self.histograms.get_mut("allocation_size_bytes").unwrap().record(...);

        // Export if interval has elapsed
        if self.last_export.elapsed() >= self.config.metrics_interval {
            self.export_metrics()?;
            self.last_export = Instant::now();
        }

        Ok(())
    }

    fn export_metrics(&self) -> Result<()> {
        if !self.config.enable_metrics_export {
            return Ok(());
        }

        // Export metrics to configured endpoint
        tracing::info!("Exporting memory profiling metrics to {}", self.config.metrics_endpoint);

        // In a real implementation, this would send metrics to the endpoint
        // For now, we'll just log the export event
        audit::log("metrics_export", &format!("Exported metrics to {}", self.config.metrics_endpoint))?;

        Ok(())
    }
}

/// External systems integration manager
pub struct ExternalIntegrationsManager {
    config: ExternalIntegrationConfig,
    monitoring_systems: HashMap<String, Arc<Mutex<dyn MonitoringSystemConnector>>>,
    data_exporters: HashMap<String, Arc<Mutex<dyn DataExporter>>>,
    alerting_systems: HashMap<String, Arc<Mutex<dyn AlertingSystemConnector>>>,
    database_connectors: HashMap<String, Arc<Mutex<dyn DatabaseConnector>>>,
    active_exports: HashMap<String, ExportSession>,
}

/// Export session tracking
#[derive(Debug, Clone)]
pub struct ExportSession {
    pub session_id: String,
    pub started_at: Instant,
    pub destination: String,
    pub format: ExportFormat,
    pub records_exported: usize,
    pub status: ExportStatus,
}

#[derive(Debug, Clone, PartialEq)]
pub enum ExportStatus {
    Initializing,
    Running,
    Completed,
    Failed(String),
    Cancelled,
}

/// Trait for monitoring system connectors
pub trait MonitoringSystemConnector: Send + Sync {
    fn connect(&mut self) -> Result<()>;
    fn send_metrics(&mut self, metrics: &HashMap<String, f64>) -> Result<()>;
    fn send_events(&mut self, events: &[MonitoringEvent]) -> Result<()>;
    fn health_check(&self) -> Result<HealthStatus>;
    fn disconnect(&mut self) -> Result<()>;
}

/// Monitoring event for external systems
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MonitoringEvent {
    pub timestamp: SystemTime,
    pub event_type: String,
    pub severity: EventSeverity,
    pub message: String,
    pub metadata: HashMap<String, String>,
    pub metrics: HashMap<String, f64>,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum EventSeverity {
    Debug,
    Info,
    Warning,
    Error,
    Critical,
}

/// Health status for external connections
#[derive(Debug, Clone, PartialEq)]
pub enum HealthStatus {
    Healthy,
    Degraded,
    Unhealthy,
    Unknown,
}

/// Trait for data exporters
pub trait DataExporter: Send + Sync {
    fn initialize(&mut self) -> Result<()>;
    fn export_batch(&mut self, data: &[ProfilingDataExport]) -> Result<usize>;
    fn finalize(&mut self) -> Result<ExportSummary>;
    fn get_status(&self) -> ExportStatus;
}

/// Export operation summary
#[derive(Debug, Clone)]
pub struct ExportSummary {
    pub total_records: usize,
    pub bytes_exported: usize,
    pub duration: Duration,
    pub compression_ratio: f64,
    pub destination: String,
    pub checksum: Option<String>,
}

/// Trait for alerting system connectors
pub trait AlertingSystemConnector: Send + Sync {
    fn connect(&mut self) -> Result<()>;
    fn send_alert(&mut self, alert: &Alert) -> Result<String>; // Returns alert ID
    fn acknowledge_alert(&mut self, alert_id: &str) -> Result<()>;
    fn resolve_alert(&mut self, alert_id: &str) -> Result<()>;
    fn get_alert_status(&self, alert_id: &str) -> Result<AlertStatus>;
}

/// Alert definition
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Alert {
    pub id: Option<String>,
    pub title: String,
    pub description: String,
    pub severity: AlertSeverity,
    pub source: String,
    pub timestamp: SystemTime,
    pub metadata: HashMap<String, String>,
    pub affected_resources: Vec<String>,
    pub runbook_url: Option<String>,
}

/// Alert status tracking
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum AlertStatus {
    Triggered,
    Acknowledged,
    Resolved,
    Suppressed,
    Unknown,
}

/// Trait for database connectors
pub trait DatabaseConnector: Send + Sync {
    fn connect(&mut self) -> Result<()>;
    fn create_schema(&mut self) -> Result<()>;
    fn insert_batch(&mut self, data: &[ProfilingDataExport]) -> Result<usize>;
    fn query_data(&mut self, query: &DatabaseQuery) -> Result<Vec<ProfilingDataExport>>;
    fn cleanup_old_data(&mut self, retention_days: u32) -> Result<usize>;
    fn get_connection_status(&self) -> ConnectionStatus;
}

/// Database query specification
#[derive(Debug, Clone)]
pub struct DatabaseQuery {
    pub time_range: Option<TimeRange>,
    pub filters: HashMap<String, String>,
    pub limit: Option<usize>,
    pub offset: Option<usize>,
    pub order_by: Option<String>,
}

/// Connection status for databases
#[derive(Debug, Clone, PartialEq)]
pub enum ConnectionStatus {
    Connected,
    Connecting,
    Disconnected,
    Error(String),
}

impl ExternalIntegrationsManager {
    pub fn new(config: ExternalIntegrationConfig) -> Self {
        Self {
            config,
            monitoring_systems: HashMap::new(),
            data_exporters: HashMap::new(),
            alerting_systems: HashMap::new(),
            database_connectors: HashMap::new(),
            active_exports: HashMap::new(),
        }
    }

    /// Initialize all configured integrations
    pub fn initialize(&mut self) -> Result<()> {
        self.initialize_monitoring_systems()?;
        self.initialize_data_exporters()?;
        self.initialize_alerting_systems()?;
        self.initialize_database_connectors()?;
        Ok(())
    }

    fn initialize_monitoring_systems(&mut self) -> Result<()> {
        for system_config in &self.config.monitoring_systems {
            if !system_config.enabled {
                continue;
            }

            let connector = self.create_monitoring_connector(system_config)?;
            let system_id = format!("{}_{}",
                system_config.system_type as u8,
                system_config.endpoint.replace("://", "_").replace("/", "_"));

            self.monitoring_systems.insert(system_id, Arc::new(Mutex::new(connector)));
        }
        Ok(())
    }

    fn initialize_data_exporters(&mut self) -> Result<()> {
        for exporter_config in &self.config.data_exporters {
            let exporter = self.create_data_exporter(exporter_config)?;
            let exporter_id = format!("{:?}_{}", exporter_config.exporter_type, exporter_config.destination);

            self.data_exporters.insert(exporter_id, Arc::new(Mutex::new(exporter)));
        }
        Ok(())
    }

    fn initialize_alerting_systems(&mut self) -> Result<()> {
        for alerting_config in &self.config.alerting_systems {
            let connector = self.create_alerting_connector(alerting_config)?;
            let system_id = format!("{:?}_{}", alerting_config.system_type, alerting_config.endpoint);

            self.alerting_systems.insert(system_id, Arc::new(Mutex::new(connector)));
        }
        Ok(())
    }

    fn initialize_database_connectors(&mut self) -> Result<()> {
        for db_config in &self.config.database_connectors {
            let connector = self.create_database_connector(db_config)?;
            let db_id = format!("{:?}_{}", db_config.database_type, db_config.schema);

            self.database_connectors.insert(db_id, Arc::new(Mutex::new(connector)));
        }
        Ok(())
    }

    /// Export profiling data to all configured destinations
    pub fn export_data(&mut self, data: &[ProfilingDataExport]) -> Result<Vec<ExportSummary>> {
        let mut summaries = Vec::new();

        for (exporter_id, exporter) in &self.data_exporters {
            match exporter.lock() {
                Ok(mut exp) => {
                    match exp.export_batch(data) {
                        Ok(_records_exported) => {
                            let summary = exp.finalize()?;
                            summaries.push(summary);
                        }
                        Err(e) => {
                            tracing::error!("Export failed for {}: {}", exporter_id, e);
                        }
                    }
                }
                Err(e) => {
                    tracing::error!("Failed to acquire lock for exporter {}: {}", exporter_id, e);
                }
            }
        }

        Ok(summaries)
    }

    /// Send alert to all configured alerting systems
    pub fn send_alert(&mut self, alert: &Alert) -> Result<Vec<String>> {
        let mut alert_ids = Vec::new();

        for (system_id, system) in &self.alerting_systems {
            match system.lock() {
                Ok(mut sys) => {
                    match sys.send_alert(alert) {
                        Ok(alert_id) => {
                            alert_ids.push(alert_id);
                            tracing::info!("Alert sent to {}: {}", system_id, alert.title);
                        }
                        Err(e) => {
                            tracing::error!("Failed to send alert to {}: {}", system_id, e);
                        }
                    }
                }
                Err(e) => {
                    tracing::error!("Failed to acquire lock for alerting system {}: {}", system_id, e);
                }
            }
        }

        Ok(alert_ids)
    }

    /// Send metrics to all monitoring systems
    pub fn send_metrics(&mut self, metrics: &HashMap<String, f64>) -> Result<()> {
        for (system_id, system) in &self.monitoring_systems {
            match system.lock() {
                Ok(mut sys) => {
                    if let Err(e) = sys.send_metrics(metrics) {
                        tracing::error!("Failed to send metrics to {}: {}", system_id, e);
                    }
                }
                Err(e) => {
                    tracing::error!("Failed to acquire lock for monitoring system {}: {}", system_id, e);
                }
            }
        }
        Ok(())
    }

    /// Store data in all configured databases
    pub fn store_data(&mut self, data: &[ProfilingDataExport]) -> Result<()> {
        for (db_id, db) in &self.database_connectors {
            match db.lock() {
                Ok(mut database) => {
                    match database.insert_batch(data) {
                        Ok(inserted) => {
                            tracing::info!("Inserted {} records into {}", inserted, db_id);
                        }
                        Err(e) => {
                            tracing::error!("Failed to insert data into {}: {}", db_id, e);
                        }
                    }
                }
                Err(e) => {
                    tracing::error!("Failed to acquire lock for database {}: {}", db_id, e);
                }
            }
        }
        Ok(())
    }

    /// Health check for all integrations
    pub fn health_check(&self) -> IntegrationHealthReport {
        let mut report = IntegrationHealthReport {
            overall_status: HealthStatus::Healthy,
            monitoring_systems: HashMap::new(),
            data_exporters: HashMap::new(),
            alerting_systems: HashMap::new(),
            database_connectors: HashMap::new(),
            timestamp: SystemTime::now(),
        };

        // Check monitoring systems
        for (system_id, system) in &self.monitoring_systems {
            if let Ok(sys) = system.lock() {
                let status = sys.health_check().unwrap_or(HealthStatus::Unknown);
                report.monitoring_systems.insert(system_id.clone(), status);
            }
        }

        // Check data exporters
        for (exporter_id, exporter) in &self.data_exporters {
            if let Ok(exp) = exporter.lock() {
                let status = match exp.get_status() {
                    ExportStatus::Running | ExportStatus::Completed => HealthStatus::Healthy,
                    ExportStatus::Failed(_) => HealthStatus::Unhealthy,
                    _ => HealthStatus::Unknown,
                };
                report.data_exporters.insert(exporter_id.clone(), status);
            }
        }

        // Check database connectors
        for (db_id, db) in &self.database_connectors {
            if let Ok(database) = db.lock() {
                let status = match database.get_connection_status() {
                    ConnectionStatus::Connected => HealthStatus::Healthy,
                    ConnectionStatus::Connecting => HealthStatus::Degraded,
                    ConnectionStatus::Disconnected => HealthStatus::Unhealthy,
                    ConnectionStatus::Error(_) => HealthStatus::Unhealthy,
                };
                report.database_connectors.insert(db_id.clone(), status);
            }
        }

        // Determine overall status
        let all_statuses: Vec<_> = report.monitoring_systems.values()
            .chain(report.data_exporters.values())
            .chain(report.database_connectors.values())
            .collect();

        report.overall_status = if all_statuses.iter().all(|&s| s == &HealthStatus::Healthy) {
            HealthStatus::Healthy
        } else if all_statuses.iter().any(|&s| s == &HealthStatus::Unhealthy) {
            HealthStatus::Unhealthy
        } else {
            HealthStatus::Degraded
        };

        report
    }

    // Factory methods for creating connectors (simplified - would be actual implementations)
    fn create_monitoring_connector(&self, _config: &MonitoringSystemConfig) -> Result<Box<dyn MonitoringSystemConnector>> {
        Err(CoreError::InvalidOperation("Connector creation not implemented".to_string()))
    }

    fn create_data_exporter(&self, _config: &DataExporterConfig) -> Result<Box<dyn DataExporter>> {
        Err(CoreError::InvalidOperation("Exporter creation not implemented".to_string()))
    }

    fn create_alerting_connector(&self, _config: &AlertingSystemConfig) -> Result<Box<dyn AlertingSystemConnector>> {
        Err(CoreError::InvalidOperation("Alerting connector creation not implemented".to_string()))
    }

    fn create_database_connector(&self, _config: &DatabaseConnectorConfig) -> Result<Box<dyn DatabaseConnector>> {
        Err(CoreError::InvalidOperation("Database connector creation not implemented".to_string()))
    }
}

/// Health report for all integrations
#[derive(Debug, Clone)]
pub struct IntegrationHealthReport {
    pub overall_status: HealthStatus,
    pub monitoring_systems: HashMap<String, HealthStatus>,
    pub data_exporters: HashMap<String, HealthStatus>,
    pub alerting_systems: HashMap<String, HealthStatus>,
    pub database_connectors: HashMap<String, HealthStatus>,
    pub timestamp: SystemTime,
}

/// Main integration orchestrator
pub struct MemoryProfilingIntegrations {
    scirs2_metrics: SciRS2MetricsIntegration,
    external_integrations: ExternalIntegrationsManager,
    plugin_registry: PluginRegistry,
    configuration: IntegrationConfiguration,
}

/// Plugin registry for extensible integrations
pub struct PluginRegistry {
    plugins: HashMap<String, Box<dyn IntegrationPlugin>>,
    plugin_metadata: HashMap<String, PluginMetadata>,
}

/// Plugin metadata
#[derive(Debug, Clone)]
pub struct PluginMetadata {
    pub name: String,
    pub version: String,
    pub description: String,
    pub author: String,
    pub capabilities: Vec<PluginCapability>,
    pub dependencies: Vec<String>,
}

/// Plugin capabilities
#[derive(Debug, Clone, PartialEq)]
pub enum PluginCapability {
    DataExport,
    MetricCollection,
    Alerting,
    Monitoring,
    Analysis,
    Custom(String),
}

/// Trait for integration plugins
pub trait IntegrationPlugin: Send + Sync {
    fn initialize(&mut self, config: &HashMap<String, String>) -> Result<()>;
    fn process_data(&mut self, data: &ProfilingDataExport) -> Result<()>;
    fn get_capabilities(&self) -> Vec<PluginCapability>;
    fn get_metadata(&self) -> PluginMetadata;
    fn health_check(&self) -> HealthStatus;
    fn shutdown(&mut self) -> Result<()>;
}

/// Overall integration configuration
#[derive(Debug, Clone)]
pub struct IntegrationConfiguration {
    pub scirs2_config: SciRS2IntegrationConfig,
    pub external_config: ExternalIntegrationConfig,
    pub plugin_configs: HashMap<String, HashMap<String, String>>,
    pub global_settings: GlobalIntegrationSettings,
}

/// Global integration settings
#[derive(Debug, Clone)]
pub struct GlobalIntegrationSettings {
    pub max_concurrent_exports: usize,
    pub retry_attempts: u32,
    pub retry_delay: Duration,
    pub circuit_breaker_threshold: u32,
    pub circuit_breaker_timeout: Duration,
    pub enable_telemetry: bool,
    pub telemetry_endpoint: String,
}

impl MemoryProfilingIntegrations {
    pub fn new(config: IntegrationConfiguration) -> Result<Self> {
        let scirs2_metrics = SciRS2MetricsIntegration::new(config.scirs2_config.clone())?;
        let external_integrations = ExternalIntegrationsManager::new(config.external_config.clone());
        let plugin_registry = PluginRegistry::new();

        Ok(Self {
            scirs2_metrics,
            external_integrations,
            plugin_registry,
            configuration: config,
        })
    }

    /// Initialize all integrations
    pub fn initialize(&mut self) -> Result<()> {
        self.external_integrations.initialize()?;
        self.plugin_registry.load_plugins(&self.configuration.plugin_configs)?;
        Ok(())
    }

    /// Process memory profiling data through all integrations
    pub fn process_profiling_data(&mut self, data: &ProfilingDataExport) -> Result<IntegrationProcessingResult> {
        let start_time = Instant::now();

        // Process through SciRS2 metrics
        if let Some(stats) = data.statistics.as_ref() {
            self.scirs2_metrics.record_statistics(stats)?;
        }

        // Process through external integrations
        let export_summaries = self.external_integrations.export_data(&[data.clone()])?;

        // Store in databases
        self.external_integrations.store_data(&[data.clone()])?;

        // Process through plugins
        for plugin in self.plugin_registry.plugins.values_mut() {
            if let Err(e) = plugin.process_data(data) {
                tracing::error!("Plugin processing failed: {}", e);
            }
        }

        let processing_duration = start_time.elapsed();

        Ok(IntegrationProcessingResult {
            processed_at: SystemTime::now(),
            processing_duration,
            export_summaries,
            plugin_results: HashMap::new(), // Would collect from plugins
            errors: vec![], // Would collect any errors
        })
    }

    /// Get comprehensive health status
    pub fn get_health_status(&self) -> IntegrationHealthReport {
        self.external_integrations.health_check()
    }
}

/// Result of integration processing
#[derive(Debug, Clone)]
pub struct IntegrationProcessingResult {
    pub processed_at: SystemTime,
    pub processing_duration: Duration,
    pub export_summaries: Vec<ExportSummary>,
    pub plugin_results: HashMap<String, PluginProcessingResult>,
    pub errors: Vec<String>,
}

/// Result from plugin processing
#[derive(Debug, Clone)]
pub struct PluginProcessingResult {
    pub plugin_name: String,
    pub success: bool,
    pub processing_time: Duration,
    pub records_processed: usize,
    pub message: Option<String>,
}

impl PluginRegistry {
    pub fn new() -> Self {
        Self {
            plugins: HashMap::new(),
            plugin_metadata: HashMap::new(),
        }
    }

    pub fn load_plugins(&mut self, configs: &HashMap<String, HashMap<String, String>>) -> Result<()> {
        // Enhanced plugin loading implementation with validation and error handling

        for (plugin_name, plugin_config) in configs {
            // Validate plugin configuration
            if let Err(validation_error) = self.validate_plugin_config(plugin_name, plugin_config) {
                eprintln!("Warning: Plugin {} validation failed: {}", plugin_name, validation_error);
                continue;
            }

            // Attempt to create and register the plugin
            match self.create_builtin_plugin(plugin_name, plugin_config) {
                Ok(plugin) => {
                    if let Err(e) = self.register_plugin(plugin_name.clone(), plugin) {
                        eprintln!("Failed to register plugin {}: {}", plugin_name, e);
                    } else {
                        println!("Successfully loaded plugin: {}", plugin_name);
                    }
                }
                Err(e) => {
                    eprintln!("Failed to create plugin {}: {}", plugin_name, e);
                }
            }
        }

        Ok(())
    }

    /// Validate plugin configuration parameters
    fn validate_plugin_config(&self, name: &str, config: &HashMap<String, String>) -> Result<()> {
        // Check for required configuration parameters based on plugin type
        match name {
            "cuda_profiler" => {
                if !config.contains_key("device_id") {
                    return Err("CUDA profiler requires 'device_id' parameter".into());
                }
                if let Some(device_id) = config.get("device_id") {
                    if device_id.parse::<usize>().is_err() {
                        return Err("CUDA profiler 'device_id' must be a valid number".into());
                    }
                }
            }
            "system_monitor" => {
                if let Some(interval) = config.get("sampling_interval_ms") {
                    if interval.parse::<u64>().unwrap_or(0) < 100 {
                        return Err("System monitor sampling interval must be at least 100ms".into());
                    }
                }
            }
            "memory_tracker" => {
                if let Some(threshold) = config.get("alert_threshold_mb") {
                    if threshold.parse::<usize>().unwrap_or(0) == 0 {
                        return Err("Memory tracker alert threshold must be positive".into());
                    }
                }
            }
            _ => {
                // For unknown plugin types, just validate common parameters
                if config.contains_key("enabled") {
                    if let Some(enabled) = config.get("enabled") {
                        if enabled.parse::<bool>().is_err() {
                            return Err("'enabled' parameter must be true or false".into());
                        }
                    }
                }
            }
        }

        Ok(())
    }

    /// Create builtin plugins based on configuration
    fn create_builtin_plugin(
        &self,
        name: &str,
        config: &HashMap<String, String>,
    ) -> Result<Box<dyn IntegrationPlugin>> {
        match name {
            "cuda_profiler" => {
                let device_id = config
                    .get("device_id")
                    .and_then(|id| id.parse().ok())
                    .unwrap_or(0);

                Ok(Box::new(CudaProfilerPlugin::new(device_id)))
            }
            "system_monitor" => {
                let sampling_interval = config
                    .get("sampling_interval_ms")
                    .and_then(|interval| interval.parse().ok())
                    .unwrap_or(1000);

                Ok(Box::new(SystemMonitorPlugin::new(sampling_interval)))
            }
            "memory_tracker" => {
                let alert_threshold = config
                    .get("alert_threshold_mb")
                    .and_then(|threshold| threshold.parse().ok())
                    .unwrap_or(1024);

                Ok(Box::new(MemoryTrackerPlugin::new(alert_threshold)))
            }
            "performance_logger" => {
                let log_file = config
                    .get("log_file")
                    .unwrap_or(&"memory_profile.log".to_string())
                    .clone();

                Ok(Box::new(PerformanceLoggerPlugin::new(log_file)))
            }
            _ => {
                Err(format!("Unknown plugin type: {}", name).into())
            }
        }
    }

    pub fn register_plugin(&mut self, name: String, plugin: Box<dyn IntegrationPlugin>) -> Result<()> {
        let metadata = plugin.get_metadata();
        self.plugin_metadata.insert(name.clone(), metadata);
        self.plugins.insert(name, plugin);
        Ok(())
    }

    pub fn get_plugin(&self, name: &str) -> Option<&dyn IntegrationPlugin> {
        self.plugins.get(name).map(|p| p.as_ref())
    }

    pub fn list_plugins(&self) -> Vec<&PluginMetadata> {
        self.plugin_metadata.values().collect()
    }
}

impl Default for IntegrationConfiguration {
    fn default() -> Self {
        Self {
            scirs2_config: SciRS2IntegrationConfig::default(),
            external_config: ExternalIntegrationConfig::default(),
            plugin_configs: HashMap::new(),
            global_settings: GlobalIntegrationSettings {
                max_concurrent_exports: 5,
                retry_attempts: 3,
                retry_delay: Duration::from_secs(5),
                circuit_breaker_threshold: 10,
                circuit_breaker_timeout: Duration::from_secs(60),
                enable_telemetry: true,
                telemetry_endpoint: "http://localhost:8080/telemetry".to_string(),
            },
        }
    }
}

// Builtin plugin implementations

/// CUDA profiler plugin for GPU memory monitoring
pub struct CudaProfilerPlugin {
    device_id: usize,
    metadata: PluginMetadata,
}

impl CudaProfilerPlugin {
    pub fn new(device_id: usize) -> Self {
        Self {
            device_id,
            metadata: PluginMetadata {
                name: "CUDA Profiler".to_string(),
                version: "1.0.0".to_string(),
                description: "GPU memory and performance profiler for CUDA devices".to_string(),
                author: "TorSh Backend".to_string(),
                capabilities: vec![
                    "memory_tracking".to_string(),
                    "performance_monitoring".to_string(),
                    "gpu_utilization".to_string(),
                ],
            },
        }
    }
}

impl IntegrationPlugin for CudaProfilerPlugin {
    fn initialize(&mut self, _config: &HashMap<String, String>) -> Result<()> {
        println!("Initializing CUDA profiler for device {}", self.device_id);
        Ok(())
    }

    fn collect_metrics(&self) -> Result<Vec<String>> {
        // Simulate CUDA metrics collection
        Ok(vec![
            format!("cuda_memory_used_device_{}: 2048", self.device_id),
            format!("cuda_memory_total_device_{}: 8192", self.device_id),
            format!("cuda_gpu_utilization_device_{}: 75", self.device_id),
        ])
    }

    fn get_metadata(&self) -> PluginMetadata {
        self.metadata.clone()
    }

    fn shutdown(&mut self) -> Result<()> {
        println!("Shutting down CUDA profiler for device {}", self.device_id);
        Ok(())
    }
}

/// System monitor plugin for host system metrics
pub struct SystemMonitorPlugin {
    sampling_interval: u64,
    metadata: PluginMetadata,
}

impl SystemMonitorPlugin {
    pub fn new(sampling_interval: u64) -> Self {
        Self {
            sampling_interval,
            metadata: PluginMetadata {
                name: "System Monitor".to_string(),
                version: "1.0.0".to_string(),
                description: "Host system resource monitoring".to_string(),
                author: "TorSh Backend".to_string(),
                capabilities: vec![
                    "cpu_monitoring".to_string(),
                    "memory_monitoring".to_string(),
                    "disk_monitoring".to_string(),
                ],
            },
        }
    }
}

impl IntegrationPlugin for SystemMonitorPlugin {
    fn initialize(&mut self, _config: &HashMap<String, String>) -> Result<()> {
        println!("Initializing system monitor with {}ms sampling interval", self.sampling_interval);
        Ok(())
    }

    fn collect_metrics(&self) -> Result<Vec<String>> {
        // Simulate system metrics collection
        Ok(vec![
            "cpu_usage_percent: 45".to_string(),
            "memory_usage_mb: 4096".to_string(),
            "memory_total_mb: 16384".to_string(),
            "disk_usage_percent: 67".to_string(),
        ])
    }

    fn get_metadata(&self) -> PluginMetadata {
        self.metadata.clone()
    }

    fn shutdown(&mut self) -> Result<()> {
        println!("Shutting down system monitor");
        Ok(())
    }
}

/// Memory tracker plugin for allocation monitoring
pub struct MemoryTrackerPlugin {
    alert_threshold_mb: usize,
    metadata: PluginMetadata,
}

impl MemoryTrackerPlugin {
    pub fn new(alert_threshold_mb: usize) -> Self {
        Self {
            alert_threshold_mb,
            metadata: PluginMetadata {
                name: "Memory Tracker".to_string(),
                version: "1.0.0".to_string(),
                description: "Memory allocation tracking and alerting".to_string(),
                author: "TorSh Backend".to_string(),
                capabilities: vec![
                    "allocation_tracking".to_string(),
                    "leak_detection".to_string(),
                    "threshold_alerting".to_string(),
                ],
            },
        }
    }
}

impl IntegrationPlugin for MemoryTrackerPlugin {
    fn initialize(&mut self, _config: &HashMap<String, String>) -> Result<()> {
        println!("Initializing memory tracker with {}MB alert threshold", self.alert_threshold_mb);
        Ok(())
    }

    fn collect_metrics(&self) -> Result<Vec<String>> {
        // Simulate memory tracking metrics
        let current_usage = 512; // Simulate current usage
        let mut metrics = vec![
            format!("memory_allocated_mb: {}", current_usage),
            format!("memory_threshold_mb: {}", self.alert_threshold_mb),
            "memory_fragmentation_percent: 12".to_string(),
        ];

        if current_usage > self.alert_threshold_mb {
            metrics.push("memory_alert: threshold_exceeded".to_string());
        }

        Ok(metrics)
    }

    fn get_metadata(&self) -> PluginMetadata {
        self.metadata.clone()
    }

    fn shutdown(&mut self) -> Result<()> {
        println!("Shutting down memory tracker");
        Ok(())
    }
}

/// Performance logger plugin for metrics persistence
pub struct PerformanceLoggerPlugin {
    log_file: String,
    metadata: PluginMetadata,
}

impl PerformanceLoggerPlugin {
    pub fn new(log_file: String) -> Self {
        Self {
            log_file,
            metadata: PluginMetadata {
                name: "Performance Logger".to_string(),
                version: "1.0.0".to_string(),
                description: "Performance metrics logging and persistence".to_string(),
                author: "TorSh Backend".to_string(),
                capabilities: vec![
                    "metrics_logging".to_string(),
                    "data_persistence".to_string(),
                    "log_rotation".to_string(),
                ],
            },
        }
    }
}

impl IntegrationPlugin for PerformanceLoggerPlugin {
    fn initialize(&mut self, _config: &HashMap<String, String>) -> Result<()> {
        println!("Initializing performance logger with file: {}", self.log_file);
        Ok(())
    }

    fn collect_metrics(&self) -> Result<Vec<String>> {
        // This plugin doesn't collect metrics, it logs them
        Ok(vec![])
    }

    fn get_metadata(&self) -> PluginMetadata {
        self.metadata.clone()
    }

    fn shutdown(&mut self) -> Result<()> {
        println!("Shutting down performance logger");
        Ok(())
    }
}

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

    #[test]
    fn test_scirs2_integration_creation() {
        let config = SciRS2IntegrationConfig::default();
        let integration = SciRS2MetricsIntegration::new(config);
        assert!(integration.is_ok());
    }

    #[test]
    fn test_external_integrations_manager() {
        let config = ExternalIntegrationConfig::default();
        let manager = ExternalIntegrationsManager::new(config);
        assert_eq!(manager.monitoring_systems.len(), 0);
        assert_eq!(manager.data_exporters.len(), 0);
    }

    #[test]
    fn test_plugin_registry() {
        let mut registry = PluginRegistry::new();
        assert_eq!(registry.plugins.len(), 0);
        assert_eq!(registry.plugin_metadata.len(), 0);
    }

    #[test]
    fn test_integration_configuration() {
        let config = IntegrationConfiguration::default();
        assert!(config.scirs2_config.enable_metrics_export);
        assert!(config.external_config.monitoring_systems.len() > 0);
    }

    #[test]
    fn test_profiling_data_export() {
        let export_data = ProfilingDataExport {
            timestamp: SystemTime::now(),
            session_id: "test_session".to_string(),
            version: "1.0.0".to_string(),
            metadata: ExportMetadata {
                framework_version: "0.1.0".to_string(),
                export_format_version: "1.0".to_string(),
                compression_used: CompressionType::None,
                encryption_used: false,
                data_points: 100,
                time_range: TimeRange {
                    start: SystemTime::now(),
                    end: SystemTime::now(),
                    duration: Duration::from_secs(300),
                },
                export_filters: vec![],
                checksum: None,
            },
            statistics: MemoryStatistics {
                total_allocations: 1000,
                total_deallocations: 900,
                peak_memory_usage: 1024 * 1024,
                average_memory_usage: 512.0 * 1024.0,
                current_memory_usage: 800 * 1024,
                memory_churn_rate: 0.1,
                allocation_rate: 10.0,
                deallocation_rate: 9.0,
                fragmentation_index: 0.2,
                efficiency_score: 0.8,
                cache_hit_ratio: 0.9,
                bandwidth_utilization: 0.7,
                pressure_incidents: 0,
                optimization_opportunities: 2,
            },
            snapshots: vec![],
            access_patterns: vec![],
            optimization_recommendations: vec![],
            fragmentation_analysis: None,
            trend_analyses: vec![],
            anomalies: vec![],
            performance_baselines: vec![],
        };

        // Test serialization
        let serialized = serde_json::to_string(&export_data);
        assert!(serialized.is_ok());
    }

    #[test]
    fn test_alert_creation() {
        let alert = Alert {
            id: None,
            title: "High Memory Fragmentation".to_string(),
            description: "Memory fragmentation has exceeded threshold".to_string(),
            severity: AlertSeverity::High,
            source: "torsh_memory_profiler".to_string(),
            timestamp: SystemTime::now(),
            metadata: HashMap::new(),
            affected_resources: vec!["memory_pool_1".to_string()],
            runbook_url: Some("https://docs.torsh.ai/runbooks/memory".to_string()),
        };

        assert_eq!(alert.severity, AlertSeverity::High);
        assert!(!alert.title.is_empty());
    }
}