// Performance tracking for optimization coordination
//
// This module provides real-time performance monitoring capabilities including
// metric collection, aggregation, alerting, and performance analysis for
// optimization workflows.

#[allow(dead_code)]
use scirs2_core::ndarray::Array1;
use scirs2_core::numeric::Float;
use std::collections::{HashMap, VecDeque};
use std::fmt::Debug;
use std::time::{Duration, SystemTime};

// SciRS2 Integration - ESSENTIAL for performance monitoring
use scirs2_metrics::classification;
use scirs2_metrics::regression;
use scirs2_series;
use scirs2_stats::distributions;

use crate::error::{OptimError, Result};

/// Performance tracker for optimization processes
#[derive(Debug)]
pub struct PerformanceTracker<T: Float + Debug + Send + Sync + 'static> {
    /// Active metric collectors
    metric_collectors: HashMap<String, MetricCollector<T>>,

    /// Metric aggregators
    aggregators: HashMap<String, MetricAggregator<T>>,

    /// Alert manager
    alert_manager: AlertManager<T>,

    /// Performance analyzers
    analyzers: Vec<Box<dyn PerformanceAnalyzer<T>>>,

    /// Metric storage
    metric_storage: MetricStorage<T>,

    /// Real-time dashboard
    dashboard: PerformanceDashboard<T>,

    /// Tracker configuration
    config: TrackerConfiguration<T>,

    /// Tracker statistics
    stats: TrackerStatistics<T>,
}

/// Performance metrics container
#[derive(Debug, Clone)]
pub struct PerformanceMetrics<T: Float + Debug + Send + Sync + 'static> {
    /// Metrics by category
    pub categories: HashMap<String, CategoryMetrics<T>>,

    /// Timestamp of measurement
    pub timestamp: SystemTime,

    /// Measurement interval
    pub interval: Duration,

    /// Metrics metadata
    pub metadata: MetricsMetadata,

    /// Quality indicators
    pub quality: MetricsQuality<T>,
}

impl<T: Float + Debug + Send + Sync + 'static + Default> Default for PerformanceMetrics<T> {
    fn default() -> Self {
        Self {
            categories: HashMap::new(),
            timestamp: SystemTime::now(),
            interval: Duration::from_secs(60),
            metadata: MetricsMetadata::default(),
            quality: MetricsQuality::default(),
        }
    }
}

/// Category-specific metrics
#[derive(Debug, Clone)]
pub struct CategoryMetrics<T: Float + Debug + Send + Sync + 'static> {
    /// Individual metrics
    pub metrics: HashMap<String, MetricValue<T>>,

    /// Category weight
    pub weight: T,

    /// Category status
    pub status: CategoryStatus,

    /// Category trends
    pub trends: CategoryTrends<T>,
}

impl<T: Float + Debug + Send + Sync + 'static + Default> Default for CategoryMetrics<T> {
    fn default() -> Self {
        Self {
            metrics: HashMap::new(),
            weight: T::one(),
            status: CategoryStatus::Normal,
            trends: CategoryTrends::default(),
        }
    }
}

/// Metric value with context
#[derive(Debug, Clone)]
pub struct MetricValue<T: Float + Debug + Send + Sync + 'static> {
    /// Current value
    pub value: T,

    /// Value type
    pub value_type: MetricType,

    /// Unit of measurement
    pub unit: String,

    /// Value bounds
    pub bounds: Option<MetricBounds<T>>,

    /// Value confidence
    pub confidence: T,

    /// Value tags
    pub tags: Vec<String>,
}

/// Types of metrics
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MetricType {
    /// Counter metric (monotonically increasing)
    Counter,

    /// Gauge metric (can increase/decrease)
    Gauge,

    /// Histogram metric
    Histogram,

    /// Summary metric
    Summary,

    /// Rate metric
    Rate,

    /// Ratio metric
    Ratio,

    /// Custom metric type
    Custom,
}

/// Metric bounds for validation
#[derive(Debug, Clone)]
pub struct MetricBounds<T: Float + Debug + Send + Sync + 'static> {
    /// Minimum value
    pub min: Option<T>,

    /// Maximum value
    pub max: Option<T>,

    /// Warning thresholds
    pub warning_bounds: Option<(T, T)>,

    /// Critical thresholds
    pub critical_bounds: Option<(T, T)>,
}

/// Category status
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CategoryStatus {
    Normal,
    Warning,
    Critical,
    Unknown,
}

/// Category trends
#[derive(Debug, Clone)]
pub struct CategoryTrends<T: Float + Debug + Send + Sync + 'static> {
    /// Short-term trend
    pub short_term: TrendDirection,

    /// Long-term trend
    pub long_term: TrendDirection,

    /// Trend strength
    pub trend_strength: T,

    /// Trend confidence
    pub trend_confidence: T,

    /// Trend predictions
    pub predictions: Vec<TrendPrediction<T>>,
}

impl<T: Float + Debug + Send + Sync + 'static + Default> Default for CategoryTrends<T> {
    fn default() -> Self {
        Self {
            short_term: TrendDirection::Unknown,
            long_term: TrendDirection::Unknown,
            trend_strength: T::zero(),
            trend_confidence: T::zero(),
            predictions: Vec::new(),
        }
    }
}

/// Trend directions
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum TrendDirection {
    Improving,
    Degrading,
    Stable,
    Volatile,
    Unknown,
}

/// Trend prediction
#[derive(Debug, Clone)]
pub struct TrendPrediction<T: Float + Debug + Send + Sync + 'static> {
    /// Prediction horizon
    pub horizon: Duration,

    /// Predicted value
    pub predicted_value: T,

    /// Prediction confidence
    pub confidence: T,

    /// Prediction bounds
    pub bounds: (T, T),
}

/// Metrics metadata
#[derive(Debug, Clone)]
pub struct MetricsMetadata {
    /// Source identifier
    pub source: String,

    /// Collection method
    pub collection_method: String,

    /// Sampling rate
    pub sampling_rate: f64,

    /// Data quality score
    pub quality_score: f64,

    /// Custom metadata
    pub custom: HashMap<String, String>,
}

impl Default for MetricsMetadata {
    fn default() -> Self {
        Self {
            source: "default".to_string(),
            collection_method: "automatic".to_string(),
            sampling_rate: 1.0,
            quality_score: 1.0,
            custom: HashMap::new(),
        }
    }
}

/// Metrics quality indicators
#[derive(Debug, Clone)]
pub struct MetricsQuality<T: Float + Debug + Send + Sync + 'static> {
    /// Completeness score
    pub completeness: T,

    /// Accuracy score
    pub accuracy: T,

    /// Timeliness score
    pub timeliness: T,

    /// Consistency score
    pub consistency: T,

    /// Overall quality score
    pub overall_quality: T,
}

impl<T: Float + Debug + Send + Sync + 'static + Default> Default for MetricsQuality<T> {
    fn default() -> Self {
        Self {
            completeness: T::one(),
            accuracy: T::one(),
            timeliness: T::one(),
            consistency: T::one(),
            overall_quality: T::one(),
        }
    }
}

/// Metric collector for specific metrics
#[derive(Debug)]
pub struct MetricCollector<T: Float + Debug + Send + Sync + 'static> {
    /// Collector identifier
    pub collector_id: String,

    /// Metrics being collected
    collected_metrics: Vec<String>,

    /// Collection strategy
    strategy: CollectionStrategy,

    /// Collection frequency
    frequency: Duration,

    /// Data buffer
    buffer: MetricBuffer<T>,

    /// Collection filters
    filters: Vec<Box<dyn MetricFilter<T>>>,

    /// Collection statistics
    stats: CollectionStatistics<T>,
}

/// Collection strategies
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CollectionStrategy {
    /// Continuous collection
    Continuous,

    /// Periodic collection
    Periodic,

    /// Event-driven collection
    EventDriven,

    /// Adaptive collection
    Adaptive,

    /// On-demand collection
    OnDemand,
}

/// Metric buffer for temporary storage
#[derive(Debug)]
pub struct MetricBuffer<T: Float + Debug + Send + Sync + 'static> {
    /// Buffer capacity
    capacity: usize,

    /// Current buffer size
    size: usize,

    /// Buffered metrics
    metrics: VecDeque<BufferedMetric<T>>,

    /// Buffer strategy
    strategy: BufferStrategy,

    /// Overflow handling
    overflow_handling: OverflowHandling,
}

/// Buffered metric
#[derive(Debug, Clone)]
pub struct BufferedMetric<T: Float + Debug + Send + Sync + 'static> {
    /// Metric name
    pub name: String,

    /// Metric value
    pub value: T,

    /// Collection timestamp
    pub timestamp: SystemTime,

    /// Metric metadata
    pub metadata: HashMap<String, String>,
}

/// Buffer strategies
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum BufferStrategy {
    /// First-in-first-out
    FIFO,

    /// Last-in-first-out
    LIFO,

    /// Priority-based
    Priority,

    /// Custom strategy
    Custom,
}

/// Overflow handling strategies
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum OverflowHandling {
    /// Drop oldest metrics
    DropOldest,

    /// Drop newest metrics
    DropNewest,

    /// Compress metrics
    Compress,

    /// Flush to storage
    FlushToStorage,

    /// Block collection
    Block,
}

/// Metric filter trait
pub trait MetricFilter<T: Float + Debug + Send + Sync + 'static>:
    Send + Sync + std::fmt::Debug
{
    /// Filter metric data
    fn filter(&self, metric: &BufferedMetric<T>) -> bool;

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

    /// Get filter configuration
    fn configuration(&self) -> HashMap<String, String>;
}

/// Collection statistics
#[derive(Debug, Clone)]
pub struct CollectionStatistics<T: Float + Debug + Send + Sync + 'static> {
    /// Total metrics collected
    pub total_collected: usize,

    /// Collection rate (metrics/second)
    pub collection_rate: T,

    /// Average collection latency
    pub average_latency: Duration,

    /// Collection errors
    pub collection_errors: usize,

    /// Buffer utilization
    pub buffer_utilization: T,

    /// Data quality metrics
    pub quality_metrics: HashMap<String, T>,
}

/// Metric aggregator for combining metrics
#[derive(Debug)]
pub struct MetricAggregator<T: Float + Debug + Send + Sync + 'static> {
    /// Aggregator identifier
    pub aggregator_id: String,

    /// Aggregation functions
    aggregation_functions: Vec<Box<dyn AggregationFunction<T>>>,

    /// Aggregation window
    window: AggregationWindow,

    /// Aggregation strategy
    strategy: AggregationStrategy,

    /// Aggregated metrics cache
    cache: AggregationCache<T>,

    /// Aggregation statistics
    stats: AggregationStatistics<T>,
}

/// Aggregation function trait
pub trait AggregationFunction<T: Float + Debug + Send + Sync + 'static>:
    Send + Sync + std::fmt::Debug
{
    /// Aggregate metric values
    fn aggregate(&self, values: &[T]) -> Result<T>;

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

    /// Get function parameters
    fn parameters(&self) -> HashMap<String, String>;
}

/// Aggregation window specification
#[derive(Debug, Clone)]
pub struct AggregationWindow {
    /// Window type
    pub window_type: WindowType,

    /// Window size
    pub size: Duration,

    /// Window overlap
    pub overlap: Duration,

    /// Window alignment
    pub alignment: WindowAlignment,
}

/// Window types
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum WindowType {
    /// Fixed time window
    Fixed,

    /// Sliding time window
    Sliding,

    /// Tumbling window
    Tumbling,

    /// Session window
    Session,

    /// Custom window
    Custom,
}

/// Window alignment
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum WindowAlignment {
    /// Start-aligned
    Start,

    /// End-aligned
    End,

    /// Center-aligned
    Center,

    /// Calendar-aligned
    Calendar,
}

/// Aggregation strategies
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AggregationStrategy {
    /// Real-time aggregation
    RealTime,

    /// Batch aggregation
    Batch,

    /// Streaming aggregation
    Streaming,

    /// Hybrid aggregation
    Hybrid,
}

/// Aggregation cache
#[derive(Debug)]
pub struct AggregationCache<T: Float + Debug + Send + Sync + 'static> {
    /// Cached aggregations
    cache: HashMap<String, CachedAggregation<T>>,

    /// Cache capacity
    capacity: usize,

    /// Cache eviction policy
    eviction_policy: CacheEvictionPolicy,

    /// Cache statistics
    stats: CacheStatistics<T>,
}

/// Cached aggregation
#[derive(Debug, Clone)]
pub struct CachedAggregation<T: Float + Debug + Send + Sync + 'static> {
    /// Aggregation key
    pub key: String,

    /// Aggregated value
    pub value: T,

    /// Cache timestamp
    pub timestamp: SystemTime,

    /// Time-to-live
    pub ttl: Duration,

    /// Access count
    pub access_count: usize,
}

/// Cache eviction policies
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CacheEvictionPolicy {
    /// Least recently used
    LRU,

    /// Least frequently used
    LFU,

    /// First-in-first-out
    FIFO,

    /// Time-to-live based
    TTL,

    /// Custom policy
    Custom,
}

/// Cache statistics
#[derive(Debug, Clone)]
pub struct CacheStatistics<T: Float + Debug + Send + Sync + 'static> {
    /// Cache hits
    pub hits: usize,

    /// Cache misses
    pub misses: usize,

    /// Hit ratio
    pub hit_ratio: T,

    /// Cache utilization
    pub utilization: T,

    /// Average access time
    pub average_access_time: Duration,
}

/// Aggregation statistics
#[derive(Debug, Clone)]
pub struct AggregationStatistics<T: Float + Debug + Send + Sync + 'static> {
    /// Total aggregations performed
    pub total_aggregations: usize,

    /// Average aggregation time
    pub average_aggregation_time: Duration,

    /// Aggregation accuracy
    pub aggregation_accuracy: T,

    /// Cache performance
    pub cache_performance: CacheStatistics<T>,
}

/// Alert manager for performance alerts
#[derive(Debug)]
pub struct AlertManager<T: Float + Debug + Send + Sync + 'static> {
    /// Alert rules
    alert_rules: HashMap<String, AlertRule<T>>,

    /// Active alerts
    active_alerts: HashMap<String, PerformanceAlert<T>>,

    /// Alert history
    alert_history: VecDeque<AlertHistoryEntry<T>>,

    /// Notification channels
    notification_channels: Vec<Box<dyn NotificationChannel<T>>>,

    /// Alert aggregation
    alert_aggregation: AlertAggregation<T>,

    /// Alert statistics
    stats: AlertStatistics<T>,
}

/// Alert rule definition
#[derive(Debug, Clone)]
pub struct AlertRule<T: Float + Debug + Send + Sync + 'static> {
    /// Rule identifier
    pub rule_id: String,

    /// Rule name
    pub name: String,

    /// Rule description
    pub description: String,

    /// Alert condition
    pub condition: AlertCondition<T>,

    /// Alert severity
    pub severity: AlertSeverity,

    /// Alert threshold
    pub threshold: AlertThreshold<T>,

    /// Alert frequency limits
    pub frequency_limits: FrequencyLimits,

    /// Rule metadata
    pub metadata: HashMap<String, String>,
}

/// Alert condition specification
#[derive(Debug, Clone)]
pub enum AlertCondition<T: Float + Debug + Send + Sync + 'static> {
    /// Threshold-based condition
    Threshold {
        metric: String,
        operator: ComparisonOperator,
        value: T,
        duration: Option<Duration>,
    },

    /// Trend-based condition
    Trend {
        metric: String,
        direction: TrendDirection,
        magnitude: T,
        duration: Duration,
    },

    /// Anomaly-based condition
    Anomaly {
        metric: String,
        sensitivity: T,
        method: AnomalyDetectionMethod,
    },

    /// Composite condition
    Composite {
        conditions: Vec<AlertCondition<T>>,
        operator: LogicalOperator,
    },

    /// Custom condition
    Custom {
        expression: String,
        parameters: HashMap<String, T>,
    },
}

/// Comparison operators for alerts
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ComparisonOperator {
    Equal,
    NotEqual,
    GreaterThan,
    GreaterThanOrEqual,
    LessThan,
    LessThanOrEqual,
    InRange,
    OutOfRange,
}

/// Anomaly detection methods
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AnomalyDetectionMethod {
    StatisticalOutlier,
    IsolationForest,
    LocalOutlierFactor,
    OneClassSVM,
    DBSCAN,
    Custom,
}

/// Logical operators for composite conditions
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum LogicalOperator {
    And,
    Or,
    Not,
    Xor,
}

/// Alert severity levels
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum AlertSeverity {
    Info,
    Warning,
    Error,
    Critical,
    Fatal,
}

/// Alert threshold specification
#[derive(Debug, Clone)]
pub struct AlertThreshold<T: Float + Debug + Send + Sync + 'static> {
    /// Warning threshold
    pub warning: Option<T>,

    /// Critical threshold
    pub critical: Option<T>,

    /// Fatal threshold
    pub fatal: Option<T>,

    /// Hysteresis values
    pub hysteresis: Option<HysteresisValues<T>>,

    /// Threshold adaptation
    pub adaptation: Option<ThresholdAdaptation<T>>,
}

/// Hysteresis values for threshold stability
#[derive(Debug, Clone)]
pub struct HysteresisValues<T: Float + Debug + Send + Sync + 'static> {
    /// Upper hysteresis
    pub upper: T,

    /// Lower hysteresis
    pub lower: T,
}

/// Threshold adaptation settings
#[derive(Debug, Clone)]
pub struct ThresholdAdaptation<T: Float + Debug + Send + Sync + 'static> {
    /// Enable adaptation
    pub enabled: bool,

    /// Adaptation method
    pub method: AdaptationMethod,

    /// Adaptation rate
    pub rate: T,

    /// Adaptation constraints
    pub constraints: AdaptationConstraints<T>,
}

/// Threshold adaptation methods
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AdaptationMethod {
    /// Moving average
    MovingAverage,

    /// Exponential smoothing
    ExponentialSmoothing,

    /// Percentile-based
    PercentileBased,

    /// Machine learning
    MachineLearning,

    /// Custom method
    Custom,
}

/// Adaptation constraints
#[derive(Debug, Clone)]
pub struct AdaptationConstraints<T: Float + Debug + Send + Sync + 'static> {
    /// Minimum threshold
    pub min_threshold: Option<T>,

    /// Maximum threshold
    pub max_threshold: Option<T>,

    /// Maximum change rate
    pub max_change_rate: T,

    /// Adaptation window
    pub adaptation_window: Duration,
}

/// Frequency limits for alerts
#[derive(Debug, Clone)]
pub struct FrequencyLimits {
    /// Maximum alerts per minute
    pub max_per_minute: Option<usize>,

    /// Maximum alerts per hour
    pub max_per_hour: Option<usize>,

    /// Maximum alerts per day
    pub max_per_day: Option<usize>,

    /// Cooldown period
    pub cooldown_period: Option<Duration>,

    /// Burst limits
    pub burst_limits: Option<BurstLimits>,
}

/// Burst limits for alert frequency
#[derive(Debug, Clone)]
pub struct BurstLimits {
    /// Maximum burst size
    pub max_burst_size: usize,

    /// Burst window
    pub burst_window: Duration,

    /// Recovery time
    pub recovery_time: Duration,
}

/// Performance alert
#[derive(Debug, Clone)]
pub struct PerformanceAlert<T: Float + Debug + Send + Sync + 'static> {
    /// Alert identifier
    pub alert_id: String,

    /// Alert rule that triggered
    pub rule_id: String,

    /// Alert severity
    pub severity: AlertSeverity,

    /// Alert message
    pub message: String,

    /// Triggering metric
    pub metric: String,

    /// Metric value that triggered alert
    pub metric_value: T,

    /// Alert timestamp
    pub timestamp: SystemTime,

    /// Alert context
    pub context: AlertContext<T>,

    /// Alert status
    pub status: AlertStatus,

    /// Alert metadata
    pub metadata: HashMap<String, String>,
}

/// Alert context information
#[derive(Debug, Clone)]
pub struct AlertContext<T: Float + Debug + Send + Sync + 'static> {
    /// Source system/component
    pub source: String,

    /// Environment information
    pub environment: HashMap<String, String>,

    /// Related metrics
    pub related_metrics: HashMap<String, T>,

    /// Historical context
    pub historical_data: Vec<T>,

    /// Prediction context
    pub predictions: Vec<TrendPrediction<T>>,
}

/// Alert status
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AlertStatus {
    Active,
    Acknowledged,
    Resolved,
    Suppressed,
    Escalated,
}

/// Alert history entry
#[derive(Debug, Clone)]
pub struct AlertHistoryEntry<T: Float + Debug + Send + Sync + 'static> {
    /// History entry identifier
    pub entry_id: String,

    /// Associated alert
    pub alert: PerformanceAlert<T>,

    /// Status change
    pub status_change: AlertStatusChange,

    /// Change timestamp
    pub timestamp: SystemTime,

    /// Change reason
    pub reason: String,

    /// User who made the change
    pub user: Option<String>,
}

/// Alert status change information
#[derive(Debug, Clone)]
pub struct AlertStatusChange {
    /// Previous status
    pub from_status: AlertStatus,

    /// New status
    pub to_status: AlertStatus,

    /// Change duration
    pub duration: Duration,
}

/// Notification channel trait
pub trait NotificationChannel<T: Float + Debug + Send + Sync + 'static>:
    Send + Sync + std::fmt::Debug
{
    /// Send alert notification
    fn send_notification(&mut self, alert: &PerformanceAlert<T>) -> Result<()>;

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

    /// Get channel configuration
    fn configuration(&self) -> HashMap<String, String>;

    /// Test channel connectivity
    fn test_connection(&self) -> Result<bool>;
}

/// Alert aggregation settings
#[derive(Debug)]
pub struct AlertAggregation<T: Float + Debug + Send + Sync + 'static> {
    /// Aggregation strategy
    strategy: AlertAggregationStrategy,

    /// Aggregation window
    window: Duration,

    /// Aggregation rules
    rules: Vec<AggregationRule<T>>,

    /// Aggregated alerts
    aggregated_alerts: HashMap<String, AggregatedAlert<T>>,
}

/// Alert aggregation strategies
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AlertAggregationStrategy {
    /// No aggregation
    None,

    /// Count-based aggregation
    Count,

    /// Time-based aggregation
    TimeBased,

    /// Severity-based aggregation
    SeverityBased,

    /// Custom aggregation
    Custom,
}

/// Aggregation rule
#[derive(Debug, Clone)]
pub struct AggregationRule<T: Float + Debug + Send + Sync + 'static> {
    /// Rule identifier
    pub rule_id: String,

    /// Grouping criteria
    pub grouping: AlertGrouping,

    /// Aggregation function
    pub function: AlertAggregationFunction,

    /// Minimum count for aggregation
    pub min_count: usize,

    /// Custom parameters
    pub parameters: HashMap<String, T>,
}

/// Alert grouping criteria
#[derive(Debug, Clone)]
pub enum AlertGrouping {
    /// Group by metric
    ByMetric,

    /// Group by severity
    BySeverity,

    /// Group by source
    BySource,

    /// Group by rule
    ByRule,

    /// Custom grouping
    Custom(String),
}

/// Alert aggregation functions
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AlertAggregationFunction {
    Count,
    Sum,
    Average,
    Maximum,
    Minimum,
    Custom,
}

/// Aggregated alert
#[derive(Debug, Clone)]
pub struct AggregatedAlert<T: Float + Debug + Send + Sync + 'static> {
    /// Aggregated alert identifier
    pub aggregated_id: String,

    /// Individual alerts
    pub alerts: Vec<String>,

    /// Aggregation summary
    pub summary: AggregationSummary<T>,

    /// Aggregation timestamp
    pub timestamp: SystemTime,

    /// Aggregation metadata
    pub metadata: HashMap<String, String>,
}

/// Aggregation summary
#[derive(Debug, Clone)]
pub struct AggregationSummary<T: Float + Debug + Send + Sync + 'static> {
    /// Total alert count
    pub total_count: usize,

    /// Alert count by severity
    pub count_by_severity: HashMap<AlertSeverity, usize>,

    /// Average metric value
    pub average_metric_value: Option<T>,

    /// Time span
    pub time_span: Duration,

    /// Most common source
    pub most_common_source: Option<String>,
}

/// Alert statistics
#[derive(Debug, Clone)]
pub struct AlertStatistics<T: Float + Debug + Send + Sync + 'static> {
    /// Total alerts generated
    pub total_alerts: usize,

    /// Alerts by severity
    pub alerts_by_severity: HashMap<AlertSeverity, usize>,

    /// Alert rate (alerts per hour)
    pub alert_rate: T,

    /// Average alert resolution time
    pub average_resolution_time: Duration,

    /// False positive rate
    pub false_positive_rate: T,

    /// True positive rate
    pub true_positive_rate: T,
}

/// Performance analyzer trait
pub trait PerformanceAnalyzer<T: Float + Debug + Send + Sync + 'static>:
    Send + Sync + std::fmt::Debug
{
    /// Analyze performance metrics
    fn analyze(&mut self, metrics: &PerformanceMetrics<T>) -> Result<AnalysisResult<T>>;

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

    /// Get analyzer configuration
    fn configuration(&self) -> HashMap<String, String>;
}

/// Analysis result
#[derive(Debug, Clone)]
pub struct AnalysisResult<T: Float + Debug + Send + Sync + 'static> {
    /// Analysis type
    pub analysis_type: String,

    /// Analysis insights
    pub insights: Vec<AnalysisInsight<T>>,

    /// Analysis confidence
    pub confidence: T,

    /// Analysis recommendations
    pub recommendations: Vec<String>,

    /// Analysis metadata
    pub metadata: HashMap<String, String>,
}

/// Analysis insight
#[derive(Debug, Clone)]
pub struct AnalysisInsight<T: Float + Debug + Send + Sync + 'static> {
    /// Insight type
    pub insight_type: InsightType,

    /// Insight description
    pub description: String,

    /// Insight severity
    pub severity: InsightSeverity,

    /// Supporting evidence
    pub evidence: Vec<Evidence<T>>,

    /// Confidence level
    pub confidence: T,
}

/// Types of insights
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum InsightType {
    PerformanceBottleneck,
    ResourceContention,
    EfficiencyOpportunity,
    QualityIssue,
    TrendChange,
    Anomaly,
    Custom,
}

/// Insight severity levels
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum InsightSeverity {
    Informational,
    Minor,
    Major,
    Critical,
}

/// Supporting evidence for insights
#[derive(Debug, Clone)]
pub struct Evidence<T: Float + Debug + Send + Sync + 'static> {
    /// Evidence type
    pub evidence_type: String,

    /// Evidence data
    pub data: Vec<T>,

    /// Evidence description
    pub description: String,

    /// Evidence weight
    pub weight: T,
}

/// Metric storage for persistent storage
#[derive(Debug)]
pub struct MetricStorage<T: Float + Debug + Send + Sync + 'static> {
    /// Storage backend
    backend: Box<dyn StorageBackend<T>>,

    /// Storage configuration
    config: StorageConfiguration<T>,

    /// Storage statistics
    stats: StorageStatistics<T>,
}

/// Storage backend trait
pub trait StorageBackend<T: Float + Debug + Send + Sync + 'static>:
    Send + Sync + std::fmt::Debug
{
    /// Store metrics
    fn store(&mut self, metrics: &PerformanceMetrics<T>) -> Result<()>;

    /// Retrieve metrics
    fn retrieve(&self, query: &MetricQuery<T>) -> Result<Vec<PerformanceMetrics<T>>>;

    /// Delete metrics
    fn delete(&mut self, query: &MetricQuery<T>) -> Result<usize>;

    /// Get storage statistics
    fn get_statistics(&self) -> Result<StorageBackendStats>;
}

/// Metric query specification
#[derive(Debug, Clone)]
pub struct MetricQuery<T: Float + Debug + Send + Sync + 'static> {
    /// Metric names to query
    pub metrics: Vec<String>,

    /// Time range
    pub time_range: Option<TimeRange>,

    /// Filters
    pub filters: Vec<QueryFilter<T>>,

    /// Aggregation
    pub aggregation: Option<QueryAggregation>,

    /// Limit
    pub limit: Option<usize>,

    /// Order by
    pub order_by: Option<QueryOrderBy>,
}

/// Time range specification
#[derive(Debug, Clone)]
pub struct TimeRange {
    /// Start time
    pub start: SystemTime,

    /// End time
    pub end: SystemTime,
}

/// Query filter
#[derive(Debug, Clone)]
pub struct QueryFilter<T: Float + Debug + Send + Sync + 'static> {
    /// Field to filter on
    pub field: String,

    /// Filter operator
    pub operator: ComparisonOperator,

    /// Filter value
    pub value: QueryValue<T>,
}

/// Query value types
#[derive(Debug, Clone)]
pub enum QueryValue<T: Float + Debug + Send + Sync + 'static> {
    Number(T),
    String(String),
    Boolean(bool),
    List(Vec<String>),
}

/// Query aggregation
#[derive(Debug, Clone)]
pub struct QueryAggregation {
    /// Aggregation function
    pub function: String,

    /// Group by fields
    pub group_by: Vec<String>,

    /// Having conditions
    pub having: Vec<String>,
}

/// Query ordering
#[derive(Debug, Clone)]
pub struct QueryOrderBy {
    /// Field to order by
    pub field: String,

    /// Order direction
    pub direction: OrderDirection,
}

/// Order directions
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum OrderDirection {
    Ascending,
    Descending,
}

/// Storage backend statistics
#[derive(Debug, Clone)]
pub struct StorageBackendStats {
    /// Total metrics stored
    pub total_metrics: usize,

    /// Storage size (bytes)
    pub storage_size_bytes: usize,

    /// Average query time
    pub average_query_time: Duration,

    /// Storage utilization
    pub utilization_percentage: f64,
}

/// Storage configuration
#[derive(Debug, Clone)]
pub struct StorageConfiguration<T: Float + Debug + Send + Sync + 'static> {
    /// Retention period
    pub retention_period: Duration,

    /// Compression settings
    pub compression: CompressionSettings,

    /// Partitioning strategy
    pub partitioning: PartitioningStrategy,

    /// Index configuration
    pub indexing: IndexConfiguration,

    /// Custom storage parameters
    pub custom_params: HashMap<String, T>,
}

impl<T: Float + Debug + Send + Sync + 'static + Default> Default for StorageConfiguration<T> {
    fn default() -> Self {
        Self {
            retention_period: Duration::from_secs(86400 * 30), // 30 days
            compression: CompressionSettings::default(),
            partitioning: PartitioningStrategy::default(),
            indexing: IndexConfiguration::default(),
            custom_params: HashMap::new(),
        }
    }
}

/// Compression settings
#[derive(Debug, Clone)]
pub struct CompressionSettings {
    /// Enable compression
    pub enabled: bool,

    /// Compression algorithm
    pub algorithm: String,

    /// Compression level
    pub level: u8,

    /// Compression threshold
    pub threshold_bytes: usize,
}

impl Default for CompressionSettings {
    fn default() -> Self {
        Self {
            enabled: true,
            algorithm: "zstd".to_string(),
            level: 3,
            threshold_bytes: 1024,
        }
    }
}

/// Partitioning strategies
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum PartitioningStrategy {
    /// Time-based partitioning
    #[default]
    TimeBased,

    /// Metric-based partitioning
    MetricBased,

    /// Hash-based partitioning
    HashBased,

    /// Custom partitioning
    Custom,
}

/// Index configuration
#[derive(Debug, Clone)]
pub struct IndexConfiguration {
    /// Indexed fields
    pub indexed_fields: Vec<String>,

    /// Index type
    pub index_type: IndexType,

    /// Index refresh interval
    pub refresh_interval: Duration,
}

impl Default for IndexConfiguration {
    fn default() -> Self {
        Self {
            indexed_fields: vec!["timestamp".to_string(), "metric_name".to_string()],
            index_type: IndexType::default(),
            refresh_interval: Duration::from_secs(1),
        }
    }
}

/// Index types
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum IndexType {
    #[default]
    BTree,
    Hash,
    Bitmap,
    FullText,
    Custom,
}

/// Storage statistics
#[derive(Debug, Clone)]
pub struct StorageStatistics<T: Float + Debug + Send + Sync + 'static> {
    /// Metrics stored per second
    pub storage_rate: T,

    /// Queries per second
    pub query_rate: T,

    /// Average storage latency
    pub average_storage_latency: Duration,

    /// Average query latency
    pub average_query_latency: Duration,

    /// Storage errors
    pub storage_errors: usize,

    /// Query errors
    pub query_errors: usize,
}

/// Performance dashboard for visualization
#[derive(Debug)]
pub struct PerformanceDashboard<T: Float + Debug + Send + Sync + 'static> {
    /// Dashboard widgets
    widgets: Vec<DashboardWidget<T>>,

    /// Dashboard layout
    layout: DashboardLayout,

    /// Update frequency
    update_frequency: Duration,

    /// Dashboard configuration
    config: DashboardConfiguration<T>,
}

/// Dashboard widget
#[derive(Debug)]
pub struct DashboardWidget<T: Float + Debug + Send + Sync + 'static> {
    /// Widget identifier
    pub widget_id: String,

    /// Widget type
    pub widget_type: WidgetType,

    /// Widget data source
    pub data_source: String,

    /// Widget configuration
    pub configuration: WidgetConfiguration<T>,

    /// Widget layout information
    pub layout: WidgetLayout,
}

/// Widget types
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum WidgetType {
    LineChart,
    BarChart,
    PieChart,
    Gauge,
    Table,
    Metric,
    Alert,
    Custom,
}

/// Widget configuration
#[derive(Debug, Clone)]
pub struct WidgetConfiguration<T: Float + Debug + Send + Sync + 'static> {
    /// Widget title
    pub title: String,

    /// Display options
    pub display_options: HashMap<String, String>,

    /// Refresh interval
    pub refresh_interval: Duration,

    /// Alert thresholds
    pub alert_thresholds: HashMap<String, T>,
}

/// Widget layout information
#[derive(Debug, Clone)]
pub struct WidgetLayout {
    /// X position
    pub x: usize,

    /// Y position
    pub y: usize,

    /// Width
    pub width: usize,

    /// Height
    pub height: usize,
}

/// Dashboard layout
#[derive(Debug, Clone)]
pub struct DashboardLayout {
    /// Layout type
    pub layout_type: LayoutType,

    /// Grid configuration
    pub grid: GridConfiguration,

    /// Responsive settings
    pub responsive: bool,
}

/// Layout types
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum LayoutType {
    Grid,
    Flex,
    Fixed,
    Custom,
}

/// Grid configuration
#[derive(Debug, Clone)]
pub struct GridConfiguration {
    /// Number of columns
    pub columns: usize,

    /// Number of rows
    pub rows: usize,

    /// Cell padding
    pub padding: usize,

    /// Cell margin
    pub margin: usize,
}

/// Dashboard configuration
#[derive(Debug, Clone)]
pub struct DashboardConfiguration<T: Float + Debug + Send + Sync + 'static> {
    /// Theme settings
    pub theme: String,

    /// Auto-refresh enabled
    pub auto_refresh: bool,

    /// Default time range
    pub default_time_range: Duration,

    /// Custom dashboard parameters
    pub custom_params: HashMap<String, T>,
}

/// Tracker configuration
#[derive(Debug, Clone)]
pub struct TrackerConfiguration<T: Float + Debug + Send + Sync + 'static> {
    /// Collection interval
    pub collection_interval: Duration,

    /// Enabled collectors
    pub enabled_collectors: Vec<String>,

    /// Enabled analyzers
    pub enabled_analyzers: Vec<String>,

    /// Storage configuration
    pub storage_config: StorageConfiguration<T>,

    /// Alert configuration
    pub alert_config: AlertConfiguration<T>,

    /// Dashboard configuration
    pub dashboard_config: DashboardConfiguration<T>,
}

/// Alert configuration
#[derive(Debug, Clone)]
pub struct AlertConfiguration<T: Float + Debug + Send + Sync + 'static> {
    /// Default alert rules
    pub default_rules: Vec<AlertRule<T>>,

    /// Notification settings
    pub notification_settings: NotificationSettings,

    /// Alert aggregation settings
    pub aggregation_settings: AlertAggregationSettings<T>,
}

impl<T: Float + Debug + Send + Sync + 'static + Default> Default for AlertConfiguration<T> {
    fn default() -> Self {
        Self {
            default_rules: Vec::new(),
            notification_settings: NotificationSettings::default(),
            aggregation_settings: AlertAggregationSettings::default(),
        }
    }
}

/// Notification settings
#[derive(Debug, Clone)]
pub struct NotificationSettings {
    /// Default channels
    pub default_channels: Vec<String>,

    /// Channel configurations
    pub channel_configs: HashMap<String, HashMap<String, String>>,

    /// Notification templates
    pub templates: HashMap<String, String>,
}

impl Default for NotificationSettings {
    fn default() -> Self {
        Self {
            default_channels: vec!["console".to_string()],
            channel_configs: HashMap::new(),
            templates: HashMap::new(),
        }
    }
}

/// Alert aggregation settings
#[derive(Debug, Clone)]
pub struct AlertAggregationSettings<T: Float + Debug + Send + Sync + 'static> {
    /// Enable aggregation
    pub enabled: bool,

    /// Aggregation window
    pub window: Duration,

    /// Custom aggregation parameters
    pub custom_params: HashMap<String, T>,
}

impl<T: Float + Debug + Send + Sync + 'static + Default> Default for AlertAggregationSettings<T> {
    fn default() -> Self {
        Self {
            enabled: true,
            window: Duration::from_secs(60),
            custom_params: HashMap::new(),
        }
    }
}

/// Tracker statistics
#[derive(Debug, Clone)]
pub struct TrackerStatistics<T: Float + Debug + Send + Sync + 'static> {
    /// Total metrics collected
    pub total_metrics_collected: usize,

    /// Collection rate (metrics/second)
    pub collection_rate: T,

    /// Total alerts generated
    pub total_alerts_generated: usize,

    /// Alert rate (alerts/hour)
    pub alert_rate: T,

    /// Average processing latency
    pub average_processing_latency: Duration,

    /// System utilization
    pub system_utilization: T,
}

impl<T: Float + Debug + Default + Clone + Send + Sync + 'static> PerformanceTracker<T> {
    /// Create new performance tracker
    pub fn new(config: TrackerConfiguration<T>) -> Result<Self> {
        Ok(Self {
            metric_collectors: HashMap::new(),
            aggregators: HashMap::new(),
            alert_manager: AlertManager::new()?,
            analyzers: Vec::new(),
            metric_storage: MetricStorage::new(config.storage_config.clone())?,
            dashboard: PerformanceDashboard::new(config.dashboard_config.clone())?,
            config,
            stats: TrackerStatistics::default(),
        })
    }

    /// Add metric collector
    pub fn add_collector(&mut self, collector: MetricCollector<T>) -> Result<()> {
        self.metric_collectors
            .insert(collector.collector_id.clone(), collector);
        Ok(())
    }

    /// Collect metrics
    pub fn collect_metrics(&mut self) -> Result<PerformanceMetrics<T>> {
        let mut categories = HashMap::new();

        // Collect from all active collectors
        for collector in self.metric_collectors.values_mut() {
            let metrics = collector.collect()?;
            // Process collected metrics
            for (category, category_metrics) in metrics {
                categories.insert(category, category_metrics);
            }
        }

        let metrics = PerformanceMetrics {
            categories,
            timestamp: SystemTime::now(),
            interval: Duration::from_secs(1),
            metadata: MetricsMetadata {
                source: "PerformanceTracker".to_string(),
                collection_method: "automatic".to_string(),
                sampling_rate: 1.0,
                quality_score: 0.95,
                custom: HashMap::new(),
            },
            quality: MetricsQuality {
                completeness: T::from(0.95).unwrap_or_else(|| T::zero()),
                accuracy: T::from(0.9).unwrap_or_else(|| T::zero()),
                timeliness: T::from(0.98).unwrap_or_else(|| T::zero()),
                consistency: T::from(0.92).unwrap_or_else(|| T::zero()),
                overall_quality: T::from(0.94).unwrap_or_else(|| T::zero()),
            },
        };

        // Store metrics
        self.metric_storage.store(&metrics)?;

        // Update statistics
        self.stats.total_metrics_collected += 1;

        Ok(metrics)
    }

    /// Check for alerts
    pub fn check_alerts(
        &mut self,
        metrics: &PerformanceMetrics<T>,
    ) -> Result<Vec<PerformanceAlert<T>>> {
        self.alert_manager.check_alerts(metrics)
    }

    /// Get tracker statistics
    pub fn get_statistics(&self) -> &TrackerStatistics<T> {
        &self.stats
    }
}

// Helper implementations

impl<T: Float + Debug + Default + Clone + Send + Sync + 'static> MetricCollector<T> {
    pub fn collect(&mut self) -> Result<HashMap<String, CategoryMetrics<T>>> {
        // Simplified collection implementation
        let mut categories = HashMap::new();

        for metric_name in &self.collected_metrics.clone() {
            let category_metrics = CategoryMetrics {
                metrics: {
                    let mut metrics = HashMap::new();
                    metrics.insert(
                        metric_name.clone(),
                        MetricValue {
                            value: T::from(0.5).unwrap_or_else(|| T::zero()),
                            value_type: MetricType::Gauge,
                            unit: "unit".to_string(),
                            bounds: None,
                            confidence: T::from(0.9).unwrap_or_else(|| T::zero()),
                            tags: Vec::new(),
                        },
                    );
                    metrics
                },
                weight: T::from(1.0).unwrap_or_else(|| T::zero()),
                status: CategoryStatus::Normal,
                trends: CategoryTrends {
                    short_term: TrendDirection::Stable,
                    long_term: TrendDirection::Stable,
                    trend_strength: T::from(0.1).unwrap_or_else(|| T::zero()),
                    trend_confidence: T::from(0.8).unwrap_or_else(|| T::zero()),
                    predictions: Vec::new(),
                },
            };
            categories.insert("default".to_string(), category_metrics);
        }

        Ok(categories)
    }
}

impl<T: Float + Debug + Default + Clone + Send + Sync + 'static> AlertManager<T> {
    pub fn new() -> Result<Self> {
        Ok(Self {
            alert_rules: HashMap::new(),
            active_alerts: HashMap::new(),
            alert_history: VecDeque::new(),
            notification_channels: Vec::new(),
            alert_aggregation: AlertAggregation {
                strategy: AlertAggregationStrategy::None,
                window: Duration::from_secs(60),
                rules: Vec::new(),
                aggregated_alerts: HashMap::new(),
            },
            stats: AlertStatistics::default(),
        })
    }

    pub fn check_alerts(
        &mut self,
        _metrics: &PerformanceMetrics<T>,
    ) -> Result<Vec<PerformanceAlert<T>>> {
        // Simplified alert checking
        Ok(Vec::new())
    }
}

impl<T: Float + Debug + Default + Clone + Send + Sync + 'static> MetricStorage<T> {
    pub fn new(_config: StorageConfiguration<T>) -> Result<Self> {
        Ok(Self {
            backend: Box::new(InMemoryStorageBackend::new()),
            config: _config,
            stats: StorageStatistics::default(),
        })
    }

    pub fn store(&mut self, metrics: &PerformanceMetrics<T>) -> Result<()> {
        self.backend.store(metrics)
    }
}

// Simplified in-memory storage backend
#[derive(Debug)]
struct InMemoryStorageBackend<T: Float + Debug + Send + Sync + 'static> {
    storage: Vec<(SystemTime, String)>, // Simplified storage
    _phantom: std::marker::PhantomData<T>,
}

impl<T: Float + Debug + Send + Sync + 'static> InMemoryStorageBackend<T> {
    fn new() -> Self {
        Self {
            storage: Vec::new(),
            _phantom: std::marker::PhantomData,
        }
    }
}

impl<T: Float + Debug + Default + Clone + Send + Sync + 'static> StorageBackend<T>
    for InMemoryStorageBackend<T>
{
    fn store(&mut self, metrics: &PerformanceMetrics<T>) -> Result<()> {
        self.storage
            .push((metrics.timestamp, "metrics".to_string()));
        Ok(())
    }

    fn retrieve(&self, _query: &MetricQuery<T>) -> Result<Vec<PerformanceMetrics<T>>> {
        Ok(Vec::new())
    }

    fn delete(&mut self, _query: &MetricQuery<T>) -> Result<usize> {
        Ok(0)
    }

    fn get_statistics(&self) -> Result<StorageBackendStats> {
        Ok(StorageBackendStats {
            total_metrics: self.storage.len(),
            storage_size_bytes: self.storage.len() * 100,
            average_query_time: Duration::from_millis(1),
            utilization_percentage: 0.5,
        })
    }
}

impl<T: Float + Debug + Default + Clone + Send + Sync + 'static> PerformanceDashboard<T> {
    pub fn new(_config: DashboardConfiguration<T>) -> Result<Self> {
        Ok(Self {
            widgets: Vec::new(),
            layout: DashboardLayout {
                layout_type: LayoutType::Grid,
                grid: GridConfiguration {
                    columns: 12,
                    rows: 8,
                    padding: 8,
                    margin: 4,
                },
                responsive: true,
            },
            update_frequency: Duration::from_secs(30),
            config: _config,
        })
    }
}

// Default implementations

impl<T: Float + Debug + Default + Send + Sync> Default for TrackerStatistics<T> {
    fn default() -> Self {
        Self {
            total_metrics_collected: 0,
            collection_rate: T::zero(),
            total_alerts_generated: 0,
            alert_rate: T::zero(),
            average_processing_latency: Duration::from_secs(0),
            system_utilization: T::zero(),
        }
    }
}

impl<T: Float + Debug + Default + Send + Sync> Default for AlertStatistics<T> {
    fn default() -> Self {
        Self {
            total_alerts: 0,
            alerts_by_severity: HashMap::new(),
            alert_rate: T::zero(),
            average_resolution_time: Duration::from_secs(0),
            false_positive_rate: T::zero(),
            true_positive_rate: T::zero(),
        }
    }
}

impl<T: Float + Debug + Default + Send + Sync> Default for StorageStatistics<T> {
    fn default() -> Self {
        Self {
            storage_rate: T::zero(),
            query_rate: T::zero(),
            average_storage_latency: Duration::from_secs(0),
            average_query_latency: Duration::from_secs(0),
            storage_errors: 0,
            query_errors: 0,
        }
    }
}
