quantrs2-device 0.1.3

//! Internal engines and analytics for provider capability discovery.
//!
//! This module contains discovery engine, analytics engine, comparison engine,
//! monitoring system, and related types.

use std::collections::HashMap;
use std::time::{Duration, SystemTime};

use scirs2_core::ndarray::Array1;
use serde::{Deserialize, Serialize};

use crate::DeviceResult;

use super::capabilities::ProviderCapabilities;
use super::config::{
    CapabilityAnalyticsConfig, CapabilityMonitoringConfig, ComparisonConfig, ComparisonCriterion,
};
use super::events::{ComparisonResults, VerificationResult};
use super::types::ProviderInfo;

/// Capability discovery engine
pub struct CapabilityDiscoveryEngine {
    pub(crate) discovery_strategies: Vec<Box<dyn DiscoveryStrategyImpl + Send + Sync>>,
    pub(crate) verification_engine: VerificationEngine,
    pub(crate) discovery_cache: HashMap<String, SystemTime>,
}

impl CapabilityDiscoveryEngine {
    pub(crate) fn new() -> Self {
        Self {
            discovery_strategies: Vec::new(),
            verification_engine: VerificationEngine::new(),
            discovery_cache: HashMap::new(),
        }
    }

    pub(crate) async fn discover_providers(&self) -> DeviceResult<Vec<ProviderInfo>> {
        // Implementation would use discovery strategies
        Ok(Vec::new())
    }
}

/// Capability analytics engine
pub struct CapabilityAnalytics {
    pub(crate) analytics_config: CapabilityAnalyticsConfig,
    pub(crate) historical_data: Vec<CapabilitySnapshot>,
    pub(crate) trend_analyzers: HashMap<String, TrendAnalyzer>,
    pub(crate) predictive_models: HashMap<String, PredictiveModel>,
}

impl CapabilityAnalytics {
    pub(crate) fn new(config: CapabilityAnalyticsConfig) -> Self {
        Self {
            analytics_config: config,
            historical_data: Vec::new(),
            trend_analyzers: HashMap::new(),
            predictive_models: HashMap::new(),
        }
    }
}

/// Provider comparison engine
pub struct ProviderComparisonEngine {
    pub(crate) comparison_config: ComparisonConfig,
    pub(crate) ranking_algorithms: HashMap<String, Box<dyn RankingAlgorithmImpl + Send + Sync>>,
    pub(crate) comparison_cache: HashMap<String, ComparisonResults>,
}

impl ProviderComparisonEngine {
    pub(crate) fn new(config: ComparisonConfig) -> Self {
        Self {
            comparison_config: config,
            ranking_algorithms: HashMap::new(),
            comparison_cache: HashMap::new(),
        }
    }

    pub(crate) async fn compare_providers(
        &self,
        _provider_ids: &[String],
        _criteria: &[ComparisonCriterion],
    ) -> DeviceResult<ComparisonResults> {
        // Implementation would perform comprehensive comparison
        Ok(ComparisonResults {
            rankings: Vec::new(),
            comparison_matrix: HashMap::new(),
            analysis_summary: super::events::AnalysisSummary {
                key_findings: Vec::new(),
                market_insights: Vec::new(),
                trends: Vec::new(),
                risk_factors: Vec::new(),
            },
            recommendations: Vec::new(),
        })
    }
}

/// Capability monitoring system
pub struct CapabilityMonitor {
    pub(crate) monitoring_config: CapabilityMonitoringConfig,
    pub(crate) monitoring_targets: HashMap<String, MonitoringTarget>,
    pub(crate) health_status: HashMap<String, ProviderHealthStatus>,
    pub(crate) anomaly_detectors: HashMap<String, AnomalyDetector>,
}

impl CapabilityMonitor {
    pub(crate) fn new(config: CapabilityMonitoringConfig) -> Self {
        Self {
            monitoring_config: config,
            monitoring_targets: HashMap::new(),
            health_status: HashMap::new(),
            anomaly_detectors: HashMap::new(),
        }
    }
}

/// Verification engine
pub struct VerificationEngine {
    pub(crate) verification_strategies: Vec<Box<dyn VerificationStrategyImpl + Send + Sync>>,
    pub(crate) verification_cache: HashMap<String, VerificationResult>,
}

impl VerificationEngine {
    pub(crate) fn new() -> Self {
        Self {
            verification_strategies: Vec::new(),
            verification_cache: HashMap::new(),
        }
    }
}

/// Provider health status
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ProviderHealthStatus {
    /// Overall health
    pub overall_health: HealthLevel,
    /// Individual component health
    pub component_health: HashMap<String, HealthLevel>,
    /// Last health check
    pub last_check: SystemTime,
    /// Health score
    pub health_score: f64,
    /// Issues detected
    pub issues: Vec<HealthIssue>,
}

/// Health levels
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum HealthLevel {
    Excellent,
    Good,
    Fair,
    Poor,
    Critical,
    Unknown,
}

/// Health issues
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct HealthIssue {
    /// Issue type
    pub issue_type: IssueType,
    /// Severity
    pub severity: IssueSeverity,
    /// Description
    pub description: String,
    /// Detected at
    pub detected_at: SystemTime,
    /// Resolution status
    pub resolution_status: ResolutionStatus,
}

/// Issue types
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum IssueType {
    Performance,
    Availability,
    Security,
    Compliance,
    Cost,
    Support,
    Documentation,
    Integration,
    Custom(String),
}

/// Issue severity
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum IssueSeverity {
    Low,
    Medium,
    High,
    Critical,
}

/// Resolution status
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum ResolutionStatus {
    Open,
    InProgress,
    Resolved,
    Closed,
    Escalated,
}

/// Capability snapshot for analytics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CapabilitySnapshot {
    /// Provider ID
    pub provider_id: String,
    /// Timestamp
    pub timestamp: SystemTime,
    /// Capabilities
    pub capabilities: ProviderCapabilities,
    /// Performance metrics
    pub performance_metrics: HashMap<String, f64>,
    /// Health status
    pub health_status: ProviderHealthStatus,
}

/// Trend analyzer
pub struct TrendAnalyzer {
    pub(crate) analysis_window: Duration,
    pub(crate) data_points: Vec<DataPoint>,
    pub(crate) trend_model: TrendModel,
}

/// Data point for trend analysis
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DataPoint {
    /// Timestamp
    pub timestamp: SystemTime,
    /// Value
    pub value: f64,
    /// Metadata
    pub metadata: HashMap<String, String>,
}

/// Trend model
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TrendModel {
    /// Model type
    pub model_type: TrendModelType,
    /// Model parameters
    pub parameters: HashMap<String, f64>,
    /// Accuracy metrics
    pub accuracy: f64,
    /// Last updated
    pub last_updated: SystemTime,
}

/// Trend model types
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum TrendModelType {
    Linear,
    Exponential,
    Polynomial,
    Seasonal,
    ARIMA,
    MachineLearning,
}

/// Predictive model
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PredictiveModel {
    /// Model type
    pub model_type: PredictiveModelType,
    /// Features
    pub features: Vec<String>,
    /// Model parameters
    pub parameters: Array1<f64>,
    /// Accuracy metrics
    pub accuracy_metrics: AccuracyMetrics,
    /// Prediction horizon
    pub prediction_horizon: Duration,
}

/// Predictive model types
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum PredictiveModelType {
    LinearRegression,
    RandomForest,
    NeuralNetwork,
    SVM,
    DecisionTree,
    Ensemble,
}

/// Accuracy metrics for models
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AccuracyMetrics {
    /// Mean absolute error
    pub mae: f64,
    /// Root mean square error
    pub rmse: f64,
    /// R-squared
    pub r_squared: f64,
    /// Mean absolute percentage error
    pub mape: f64,
}

/// Monitoring target information
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MonitoringTarget {
    /// Target ID
    pub target_id: String,
    /// Target type
    pub target_type: MonitoringTargetType,
    /// Monitoring frequency
    pub frequency: Duration,
    /// Health check configuration
    pub health_check_config: HealthCheckConfig,
    /// Alert thresholds
    pub alert_thresholds: HashMap<String, f64>,
}

/// Monitoring target types
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum MonitoringTargetType {
    Provider,
    Endpoint,
    Service,
    Capability,
    Performance,
    Cost,
    Security,
}

/// Health check configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct HealthCheckConfig {
    /// Check type
    pub check_type: HealthCheckType,
    /// Check interval
    pub check_interval: Duration,
    /// Timeout
    pub timeout: Duration,
    /// Expected response
    pub expected_response: Option<String>,
    /// Failure threshold
    pub failure_threshold: u32,
}

/// Health check types
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum HealthCheckType {
    HTTP,
    TCP,
    Ping,
    API,
    Custom(String),
}

/// Anomaly detector for monitoring
pub struct AnomalyDetector {
    pub(crate) detector_type: AnomalyDetectorType,
    pub(crate) detection_window: Duration,
    pub(crate) sensitivity: f64,
    pub(crate) baseline_data: Vec<f64>,
    pub(crate) anomaly_threshold: f64,
}

/// Anomaly detector types
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum AnomalyDetectorType {
    Statistical,
    MachineLearning,
    Threshold,
    Pattern,
    Seasonal,
}

// Trait definitions for implementation strategies

/// Discovery strategy implementation trait
pub trait DiscoveryStrategyImpl: Send + Sync {
    /// Execute discovery
    fn discover(&self) -> DeviceResult<Vec<ProviderInfo>>;

    /// Get strategy name
    fn name(&self) -> &str;

    /// Check if strategy is available
    fn is_available(&self) -> bool;
}

/// Verification strategy implementation trait
pub trait VerificationStrategyImpl: Send + Sync {
    /// Verify provider capabilities
    fn verify(
        &self,
        provider_id: &str,
        capabilities: &ProviderCapabilities,
    ) -> DeviceResult<VerificationResult>;

    /// Get strategy name
    fn name(&self) -> &str;
}

/// Ranking algorithm implementation trait
pub trait RankingAlgorithmImpl: Send + Sync {
    /// Rank providers
    fn rank(
        &self,
        providers: &[ProviderInfo],
        criteria: &[ComparisonCriterion],
    ) -> DeviceResult<Vec<super::events::ProviderRanking>>;

    /// Get algorithm name
    fn name(&self) -> &str;
}