oxirs-arq 0.2.4

//! Real-time performance monitoring

use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::time::{Duration, Instant};

pub struct TransitionMatrix {
    transitions: HashMap<(String, String), f64>,
    transition_times: HashMap<String, Duration>,
}

/// Adaptive thresholds for classification
#[derive(Debug, Clone)]
pub struct AdaptiveThresholds {
    thresholds: HashMap<String, f64>,
    adaptation_rate: f64,
    stability_factor: f64,
}

/// Real-time monitoring system
#[derive(Debug, Clone)]
pub struct RealTimeMonitor {
    /// Live metrics collection
    live_metrics: LiveMetrics,
    /// Performance alerts
    alert_system: AlertSystem,
    /// Dashboard metrics
    dashboard_metrics: DashboardMetrics,
    /// Streaming analytics
    streaming_analytics: StreamingAnalytics,
}

/// Live metrics tracking
#[derive(Debug, Clone)]
pub struct LiveMetrics {
    pub current_qps: f64,
    pub avg_response_time: Duration,
    pub error_rate: f64,
    pub resource_utilization: ResourceUtilization,
    pub active_queries: usize,
    pub queue_length: usize,
}

/// Resource utilization metrics
#[derive(Debug, Clone)]
pub struct ResourceUtilization {
    pub cpu_usage: f64,
    pub memory_usage: f64,
    pub disk_io: f64,
    pub network_io: f64,
    pub cache_hit_rate: f64,
}

/// Alert system for performance monitoring
#[derive(Debug, Clone)]
pub struct AlertSystem {
    pub alert_rules: Vec<AlertRule>,
    pub active_alerts: Vec<ActiveAlert>,
    pub escalation_policies: Vec<EscalationPolicy>,
}

/// Alert rule definition
#[derive(Debug, Clone)]
pub struct AlertRule {
    pub name: String,
    pub condition: AlertCondition,
    pub threshold: f64,
    pub severity: AlertSeverity,
    pub actions: Vec<AlertAction>,
}

/// Alert conditions
#[derive(Debug, Clone)]
pub enum AlertCondition {
    ResponseTimeExceeds,
    ErrorRateExceeds,
    QpsExceeds,
    ResourceUsageExceeds,
    QueueLengthExceeds,
}

/// Alert severity levels
#[derive(Debug, Clone)]
pub enum AlertSeverity {
    Info,
    Warning,
    Error,
    Critical,
}

/// Alert actions
#[derive(Debug, Clone)]
pub enum AlertAction {
    Log,
    Email,
    Slack,
    AutoScale,
    OptimizationTrigger,
}

/// Active alert tracking
#[derive(Debug, Clone)]

impl TransitionMatrix {
    pub fn new() -> Self {
        Self {
            transitions: HashMap::new(),
            transition_times: HashMap::new(),
        }
    }
}

impl AdaptiveThresholds {
    pub fn new() -> Self {
        Self {
            thresholds: HashMap::new(),
            adaptation_rate: 0.1,
            stability_factor: 0.95,
        }
    }
}

impl RealTimeMonitor {
    pub fn new() -> Self {
        Self {
            live_metrics: LiveMetrics::default(),
            alert_system: AlertSystem::new(),
            dashboard_metrics: DashboardMetrics::new(),
            streaming_analytics: StreamingAnalytics::new(),
        }
    }

    pub fn update_metrics(&mut self, algebra: &Algebra, execution_time: Duration, memory_usage: usize) -> Result<()> {
        // Implementation would update real-time metrics
        Ok(())
    }

    pub fn get_current_metrics(&self) -> LiveMetrics {
        self.live_metrics.clone()
    }
}

impl Default for LiveMetrics {
    fn default() -> Self {
        Self {
            current_qps: 10.0,
            avg_response_time: Duration::from_millis(100),
            error_rate: 0.01,
            resource_utilization: ResourceUtilization::default(),
            active_queries: 5,
            queue_length: 2,
        }
    }
}

impl Default for ResourceUtilization {
    fn default() -> Self {
        Self {
            cpu_usage: 0.4,
            memory_usage: 0.6,
            disk_io: 0.3,
            network_io: 0.2,
            cache_hit_rate: 0.85,
        }
    }
}

impl AlertSystem {
    pub fn new() -> Self {
        Self {
            alert_rules: Vec::new(),
            active_alerts: Vec::new(),
            escalation_policies: Vec::new(),
        }
    }
}