// Package distribution provides comprehensive monitoring and observability for distributed context operations
package distribution

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"sort"
	"sync"
	"time"

	"chorus.services/bzzz/pkg/config"
)

// MonitoringSystem provides comprehensive monitoring for the distributed context system
type MonitoringSystem struct {
	mu                sync.RWMutex
	config            *config.Config
	metrics           *MetricsCollector
	healthChecks      *HealthCheckManager
	alertManager      *AlertManager
	dashboard         *DashboardServer
	logManager        *LogManager
	traceManager      *TraceManager
	
	// State
	running           bool
	monitoringPort    int
	updateInterval    time.Duration
	retentionPeriod   time.Duration
}

// MetricsCollector collects and aggregates system metrics
type MetricsCollector struct {
	mu               sync.RWMutex
	timeSeries       map[string]*TimeSeries
	counters         map[string]*Counter
	gauges           map[string]*Gauge
	histograms       map[string]*Histogram
	customMetrics    map[string]*CustomMetric
	aggregatedStats  *AggregatedStatistics
	exporters        []MetricsExporter
	lastCollection   time.Time
}

// TimeSeries represents a time-series metric
type TimeSeries struct {
	Name        string              `json:"name"`
	Labels      map[string]string   `json:"labels"`
	DataPoints  []*TimeSeriesPoint  `json:"data_points"`
	RetentionTTL time.Duration      `json:"retention_ttl"`
	LastUpdated time.Time           `json:"last_updated"`
}

// TimeSeriesPoint represents a single data point in a time series
type TimeSeriesPoint struct {
	Timestamp time.Time `json:"timestamp"`
	Value     float64   `json:"value"`
	Labels    map[string]string `json:"labels,omitempty"`
}

// Counter represents a monotonically increasing counter
type Counter struct {
	Name        string            `json:"name"`
	Value       int64             `json:"value"`
	Rate        float64           `json:"rate"`      // per second
	Labels      map[string]string `json:"labels"`
	LastUpdated time.Time         `json:"last_updated"`
}

// Gauge represents a value that can go up and down
type Gauge struct {
	Name        string            `json:"name"`
	Value       float64           `json:"value"`
	Min         float64           `json:"min"`
	Max         float64           `json:"max"`
	Average     float64           `json:"average"`
	Labels      map[string]string `json:"labels"`
	LastUpdated time.Time         `json:"last_updated"`
}

// Histogram represents distribution of values
type Histogram struct {
	Name        string            `json:"name"`
	Buckets     map[float64]int64 `json:"buckets"`
	Count       int64             `json:"count"`
	Sum         float64           `json:"sum"`
	Labels      map[string]string `json:"labels"`
	Percentiles map[float64]float64 `json:"percentiles"`
	LastUpdated time.Time         `json:"last_updated"`
}

// CustomMetric represents application-specific metrics
type CustomMetric struct {
	Name        string                 `json:"name"`
	Type        MetricType             `json:"type"`
	Value       interface{}            `json:"value"`
	Metadata    map[string]interface{} `json:"metadata"`
	Labels      map[string]string      `json:"labels"`
	LastUpdated time.Time              `json:"last_updated"`
}

// MetricType represents the type of custom metric
type MetricType string

const (
	MetricTypeCounter   MetricType = "counter"
	MetricTypeGauge     MetricType = "gauge"
	MetricTypeHistogram MetricType = "histogram"
	MetricTypeSummary   MetricType = "summary"
	MetricTypeCustom    MetricType = "custom"
)

// AggregatedStatistics provides high-level system statistics
type AggregatedStatistics struct {
	SystemOverview      *SystemOverview      `json:"system_overview"`
	PerformanceMetrics  *PerformanceOverview `json:"performance_metrics"`
	HealthMetrics       *HealthOverview      `json:"health_metrics"`
	ErrorMetrics        *ErrorOverview       `json:"error_metrics"`
	ResourceMetrics     *ResourceOverview    `json:"resource_metrics"`
	NetworkMetrics      *NetworkOverview     `json:"network_metrics"`
	LastUpdated         time.Time            `json:"last_updated"`
}

// SystemOverview provides system-wide overview metrics
type SystemOverview struct {
	TotalNodes          int               `json:"total_nodes"`
	HealthyNodes        int               `json:"healthy_nodes"`
	TotalContexts       int64             `json:"total_contexts"`
	DistributedContexts int64             `json:"distributed_contexts"`
	ReplicationFactor   float64           `json:"average_replication_factor"`
	SystemUptime        time.Duration     `json:"system_uptime"`
	ClusterVersion      string            `json:"cluster_version"`
	LastRestart         time.Time         `json:"last_restart"`
}

// PerformanceOverview provides performance metrics
type PerformanceOverview struct {
	RequestsPerSecond     float64           `json:"requests_per_second"`
	AverageResponseTime   time.Duration     `json:"average_response_time"`
	P95ResponseTime       time.Duration     `json:"p95_response_time"`
	P99ResponseTime       time.Duration     `json:"p99_response_time"`
	Throughput            float64           `json:"throughput_mbps"`
	CacheHitRate          float64           `json:"cache_hit_rate"`
	QueueDepth            int               `json:"queue_depth"`
	ActiveConnections     int               `json:"active_connections"`
}

// HealthOverview provides health-related metrics
type HealthOverview struct {
	OverallHealthScore    float64           `json:"overall_health_score"`
	ComponentHealth       map[string]float64 `json:"component_health"`
	FailedHealthChecks    int               `json:"failed_health_checks"`
	LastHealthCheck       time.Time         `json:"last_health_check"`
	HealthTrend           string            `json:"health_trend"` // improving, stable, degrading
	CriticalAlerts        int               `json:"critical_alerts"`
	WarningAlerts         int               `json:"warning_alerts"`
}

// ErrorOverview provides error-related metrics
type ErrorOverview struct {
	TotalErrors           int64             `json:"total_errors"`
	ErrorRate             float64           `json:"error_rate"`
	ErrorsByType          map[string]int64  `json:"errors_by_type"`
	ErrorsByComponent     map[string]int64  `json:"errors_by_component"`
	LastError             *ErrorEvent       `json:"last_error"`
	ErrorTrend            string            `json:"error_trend"` // increasing, stable, decreasing
}

// ResourceOverview provides resource utilization metrics
type ResourceOverview struct {
	CPUUtilization        float64           `json:"cpu_utilization"`
	MemoryUtilization     float64           `json:"memory_utilization"`
	DiskUtilization       float64           `json:"disk_utilization"`
	NetworkUtilization    float64           `json:"network_utilization"`
	StorageUsed           int64             `json:"storage_used_bytes"`
	StorageAvailable      int64             `json:"storage_available_bytes"`
	FileDescriptors       int               `json:"open_file_descriptors"`
	Goroutines            int               `json:"goroutines"`
}

// NetworkOverview provides network-related metrics
type NetworkOverview struct {
	TotalConnections      int               `json:"total_connections"`
	ActiveConnections     int               `json:"active_connections"`
	BandwidthUtilization  float64           `json:"bandwidth_utilization"`
	PacketLossRate        float64           `json:"packet_loss_rate"`
	AverageLatency        time.Duration     `json:"average_latency"`
	NetworkPartitions     int               `json:"network_partitions"`
	DataTransferred       int64             `json:"data_transferred_bytes"`
}

// MetricsExporter exports metrics to external systems
type MetricsExporter interface {
	Export(ctx context.Context, metrics map[string]interface{}) error
	Name() string
	IsEnabled() bool
}

// HealthCheckManager manages system health checks
type HealthCheckManager struct {
	mu            sync.RWMutex
	healthChecks  map[string]*HealthCheck
	checkResults  map[string]*HealthCheckResult
	schedules     map[string]*HealthCheckSchedule
	running       bool
}

// HealthCheck represents a single health check
type HealthCheck struct {
	Name            string                 `json:"name"`
	Description     string                 `json:"description"`
	CheckType       HealthCheckType        `json:"check_type"`
	Target          string                 `json:"target"`
	Timeout         time.Duration          `json:"timeout"`
	Interval        time.Duration          `json:"interval"`
	Retries         int                    `json:"retries"`
	Metadata        map[string]interface{} `json:"metadata"`
	Enabled         bool                   `json:"enabled"`
	CheckFunction   func(context.Context) (*HealthCheckResult, error) `json:"-"`
}

// HealthCheckType represents different types of health checks
type HealthCheckType string

const (
	HealthCheckTypeHTTP       HealthCheckType = "http"
	HealthCheckTypeTCP        HealthCheckType = "tcp"
	HealthCheckTypeCustom     HealthCheckType = "custom"
	HealthCheckTypeComponent  HealthCheckType = "component"
	HealthCheckTypeDatabase   HealthCheckType = "database"
	HealthCheckTypeService    HealthCheckType = "service"
)

// HealthCheckResult represents the result of a health check
type HealthCheckResult struct {
	CheckName     string                 `json:"check_name"`
	Status        HealthCheckStatus      `json:"status"`
	ResponseTime  time.Duration          `json:"response_time"`
	Message       string                 `json:"message"`
	Details       map[string]interface{} `json:"details"`
	Error         string                 `json:"error,omitempty"`
	Timestamp     time.Time              `json:"timestamp"`
	Attempt       int                    `json:"attempt"`
}

// HealthCheckStatus represents the status of a health check
type HealthCheckStatus string

const (
	HealthCheckStatusHealthy   HealthCheckStatus = "healthy"
	HealthCheckStatusUnhealthy HealthCheckStatus = "unhealthy"
	HealthCheckStatusWarning   HealthCheckStatus = "warning"
	HealthCheckStatusUnknown   HealthCheckStatus = "unknown"
	HealthCheckStatusTimeout   HealthCheckStatus = "timeout"
)

// HealthCheckSchedule defines when health checks should run
type HealthCheckSchedule struct {
	CheckName     string        `json:"check_name"`
	Interval      time.Duration `json:"interval"`
	NextRun       time.Time     `json:"next_run"`
	LastRun       time.Time     `json:"last_run"`
	Enabled       bool          `json:"enabled"`
	FailureCount  int           `json:"failure_count"`
}

// AlertManager manages system alerts and notifications
type AlertManager struct {
	mu            sync.RWMutex
	alertRules    map[string]*AlertRule
	activeAlerts  map[string]*Alert
	alertHistory  []*Alert
	notifiers     []AlertNotifier
	silences      map[string]*AlertSilence
	running       bool
}

// AlertRule defines conditions for triggering alerts
type AlertRule struct {
	Name          string                 `json:"name"`
	Description   string                 `json:"description"`
	Severity      AlertSeverity          `json:"severity"`
	Conditions    []*AlertCondition      `json:"conditions"`
	Duration      time.Duration          `json:"duration"`      // How long condition must persist
	Cooldown      time.Duration          `json:"cooldown"`      // Minimum time between alerts
	Labels        map[string]string      `json:"labels"`
	Annotations   map[string]string      `json:"annotations"`
	Enabled       bool                   `json:"enabled"`
	LastTriggered *time.Time             `json:"last_triggered,omitempty"`
}

// AlertCondition defines a single condition for an alert
type AlertCondition struct {
	MetricName    string          `json:"metric_name"`
	Operator      ConditionOperator `json:"operator"`
	Threshold     float64         `json:"threshold"`
	Duration      time.Duration   `json:"duration"`
}

// ConditionOperator represents comparison operators for alert conditions
type ConditionOperator string

const (
	OperatorGreaterThan    ConditionOperator = "gt"
	OperatorLessThan       ConditionOperator = "lt"
	OperatorEquals         ConditionOperator = "eq"
	OperatorNotEquals      ConditionOperator = "ne"
	OperatorGreaterOrEqual ConditionOperator = "gte"
	OperatorLessOrEqual    ConditionOperator = "lte"
)

// Alert represents an active alert
type Alert struct {
	ID            string                 `json:"id"`
	RuleName      string                 `json:"rule_name"`
	Severity      AlertSeverity          `json:"severity"`
	Status        AlertStatus            `json:"status"`
	Message       string                 `json:"message"`
	Details       map[string]interface{} `json:"details"`
	Labels        map[string]string      `json:"labels"`
	Annotations   map[string]string      `json:"annotations"`
	StartsAt      time.Time              `json:"starts_at"`
	EndsAt        *time.Time             `json:"ends_at,omitempty"`
	LastUpdated   time.Time              `json:"last_updated"`
	AckBy         string                 `json:"acknowledged_by,omitempty"`
	AckAt         *time.Time             `json:"acknowledged_at,omitempty"`
}

// AlertSeverity represents the severity level of an alert
type AlertSeverity string

const (
	SeverityInfo     AlertSeverity = "info"
	SeverityWarning  AlertSeverity = "warning"
	SeverityError    AlertSeverity = "error"
	SeverityCritical AlertSeverity = "critical"
)

// AlertStatus represents the current status of an alert
type AlertStatus string

const (
	AlertStatusFiring     AlertStatus = "firing"
	AlertStatusResolved   AlertStatus = "resolved"
	AlertStatusAcknowledged AlertStatus = "acknowledged"
	AlertStatusSilenced   AlertStatus = "silenced"
)

// AlertNotifier sends alert notifications
type AlertNotifier interface {
	Notify(ctx context.Context, alert *Alert) error
	Name() string
	IsEnabled() bool
}

// AlertSilence represents a silenced alert
type AlertSilence struct {
	ID          string            `json:"id"`
	Matchers    map[string]string `json:"matchers"`
	StartTime   time.Time         `json:"start_time"`
	EndTime     time.Time         `json:"end_time"`
	CreatedBy   string            `json:"created_by"`
	Comment     string            `json:"comment"`
	Active      bool              `json:"active"`
}

// DashboardServer provides web-based monitoring dashboard
type DashboardServer struct {
	mu           sync.RWMutex
	server       *http.Server
	dashboards   map[string]*Dashboard
	widgets      map[string]*Widget
	customPages  map[string]*CustomPage
	running      bool
	port         int
}

// Dashboard represents a monitoring dashboard
type Dashboard struct {
	ID          string            `json:"id"`
	Name        string            `json:"name"`
	Description string            `json:"description"`
	Widgets     []*Widget         `json:"widgets"`
	Layout      *DashboardLayout  `json:"layout"`
	Settings    *DashboardSettings `json:"settings"`
	CreatedBy   string            `json:"created_by"`
	CreatedAt   time.Time         `json:"created_at"`
	UpdatedAt   time.Time         `json:"updated_at"`
}

// Widget represents a dashboard widget
type Widget struct {
	ID           string                 `json:"id"`
	Type         WidgetType             `json:"type"`
	Title        string                 `json:"title"`
	DataSource   string                 `json:"data_source"`
	Query        string                 `json:"query"`
	Settings     map[string]interface{} `json:"settings"`
	Position     *WidgetPosition        `json:"position"`
	RefreshRate  time.Duration          `json:"refresh_rate"`
	LastUpdated  time.Time              `json:"last_updated"`
}

// WidgetType represents different types of dashboard widgets
type WidgetType string

const (
	WidgetTypeMetric     WidgetType = "metric"
	WidgetTypeChart      WidgetType = "chart"
	WidgetTypeTable      WidgetType = "table"
	WidgetTypeAlert      WidgetType = "alert"
	WidgetTypeHealth     WidgetType = "health"
	WidgetTypeTopology   WidgetType = "topology"
	WidgetTypeLog        WidgetType = "log"
	WidgetTypeCustom     WidgetType = "custom"
)

// WidgetPosition defines widget position and size
type WidgetPosition struct {
	X      int `json:"x"`
	Y      int `json:"y"`
	Width  int `json:"width"`
	Height int `json:"height"`
}

// DashboardLayout defines dashboard layout settings
type DashboardLayout struct {
	Columns     int               `json:"columns"`
	RowHeight   int               `json:"row_height"`
	Margins     [2]int            `json:"margins"`    // [x, y]
	Spacing     [2]int            `json:"spacing"`    // [x, y]
	Breakpoints map[string]int    `json:"breakpoints"`
}

// DashboardSettings contains dashboard configuration
type DashboardSettings struct {
	AutoRefresh     bool          `json:"auto_refresh"`
	RefreshInterval time.Duration `json:"refresh_interval"`
	TimeRange       string        `json:"time_range"`
	Theme           string        `json:"theme"`
	ShowLegend      bool          `json:"show_legend"`
	ShowGrid        bool          `json:"show_grid"`
}

// CustomPage represents a custom monitoring page
type CustomPage struct {
	Path        string            `json:"path"`
	Title       string            `json:"title"`
	Content     string            `json:"content"`
	ContentType string            `json:"content_type"`
	Handler     http.HandlerFunc  `json:"-"`
}

// LogManager manages system logs and log analysis
type LogManager struct {
	mu          sync.RWMutex
	logSources  map[string]*LogSource
	logEntries  []*LogEntry
	logAnalyzers []LogAnalyzer
	retentionPolicy *LogRetentionPolicy
	running     bool
}

// LogSource represents a source of log data
type LogSource struct {
	Name        string            `json:"name"`
	Type        LogSourceType     `json:"type"`
	Location    string            `json:"location"`
	Format      LogFormat         `json:"format"`
	Labels      map[string]string `json:"labels"`
	Enabled     bool              `json:"enabled"`
	LastRead    time.Time         `json:"last_read"`
}

// LogSourceType represents different types of log sources
type LogSourceType string

const (
	LogSourceTypeFile      LogSourceType = "file"
	LogSourceTypeHTTP      LogSourceType = "http"
	LogSourceTypeStream    LogSourceType = "stream"
	LogSourceTypeDatabase  LogSourceType = "database"
	LogSourceTypeCustom    LogSourceType = "custom"
)

// LogFormat represents log entry format
type LogFormat string

const (
	LogFormatJSON   LogFormat = "json"
	LogFormatText   LogFormat = "text"
	LogFormatSyslog LogFormat = "syslog"
	LogFormatCustom LogFormat = "custom"
)

// LogEntry represents a single log entry
type LogEntry struct {
	Timestamp   time.Time         `json:"timestamp"`
	Level       LogLevel          `json:"level"`
	Source      string            `json:"source"`
	Message     string            `json:"message"`
	Fields      map[string]interface{} `json:"fields"`
	Labels      map[string]string `json:"labels"`
	TraceID     string            `json:"trace_id,omitempty"`
	SpanID      string            `json:"span_id,omitempty"`
}

// LogLevel represents log entry severity
type LogLevel string

const (
	LogLevelTrace LogLevel = "trace"
	LogLevelDebug LogLevel = "debug"
	LogLevelInfo  LogLevel = "info"
	LogLevelWarn  LogLevel = "warn"
	LogLevelError LogLevel = "error"
	LogLevelFatal LogLevel = "fatal"
)

// LogAnalyzer analyzes log entries for patterns and anomalies
type LogAnalyzer interface {
	Analyze(ctx context.Context, entries []*LogEntry) (*LogAnalysisResult, error)
	Name() string
}

// LogAnalysisResult represents the result of log analysis
type LogAnalysisResult struct {
	AnalyzerName    string                 `json:"analyzer_name"`
	Anomalies       []*LogAnomaly          `json:"anomalies"`
	Patterns        []*LogPattern          `json:"patterns"`
	Statistics      *LogStatistics         `json:"statistics"`
	Recommendations []string               `json:"recommendations"`
	AnalyzedAt      time.Time              `json:"analyzed_at"`
}

// LogAnomaly represents detected log anomaly
type LogAnomaly struct {
	Type        AnomalyType       `json:"type"`
	Severity    AlertSeverity     `json:"severity"`
	Description string            `json:"description"`
	Entries     []*LogEntry       `json:"entries"`
	Confidence  float64           `json:"confidence"`
	DetectedAt  time.Time         `json:"detected_at"`
}

// AnomalyType represents different types of log anomalies
type AnomalyType string

const (
	AnomalyTypeErrorSpike     AnomalyType = "error_spike"
	AnomalyTypeUnusualPattern AnomalyType = "unusual_pattern"
	AnomalyTypeMissingLogs    AnomalyType = "missing_logs"
	AnomalyTypeRateChange     AnomalyType = "rate_change"
	AnomalyTypeNewError       AnomalyType = "new_error"
)

// LogPattern represents detected log pattern
type LogPattern struct {
	Pattern     string            `json:"pattern"`
	Frequency   int               `json:"frequency"`
	LastSeen    time.Time         `json:"last_seen"`
	Sources     []string          `json:"sources"`
	Confidence  float64           `json:"confidence"`
}

// LogStatistics provides log statistics
type LogStatistics struct {
	TotalEntries    int64                  `json:"total_entries"`
	EntriesByLevel  map[LogLevel]int64     `json:"entries_by_level"`
	EntriesBySource map[string]int64       `json:"entries_by_source"`
	ErrorRate       float64                `json:"error_rate"`
	AverageRate     float64                `json:"average_rate"`
	TimeRange       [2]time.Time           `json:"time_range"`
}

// LogRetentionPolicy defines log retention rules
type LogRetentionPolicy struct {
	RetentionPeriod time.Duration         `json:"retention_period"`
	MaxEntries      int64                 `json:"max_entries"`
	CompressionAge  time.Duration         `json:"compression_age"`
	ArchiveAge      time.Duration         `json:"archive_age"`
	Rules           []*RetentionRule      `json:"rules"`
}

// RetentionRule defines specific retention rules
type RetentionRule struct {
	Name        string        `json:"name"`
	Condition   string        `json:"condition"`   // Query expression
	Retention   time.Duration `json:"retention"`
	Action      RetentionAction `json:"action"`
}

// RetentionAction represents retention actions
type RetentionAction string

const (
	RetentionActionDelete   RetentionAction = "delete"
	RetentionActionArchive  RetentionAction = "archive"
	RetentionActionCompress RetentionAction = "compress"
)

// TraceManager manages distributed tracing
type TraceManager struct {
	mu         sync.RWMutex
	traces     map[string]*Trace
	spans      map[string]*Span
	samplers   []TraceSampler
	exporters  []TraceExporter
	running    bool
}

// Trace represents a distributed trace
type Trace struct {
	TraceID     string            `json:"trace_id"`
	Spans       []*Span           `json:"spans"`
	Duration    time.Duration     `json:"duration"`
	StartTime   time.Time         `json:"start_time"`
	EndTime     time.Time         `json:"end_time"`
	Status      TraceStatus       `json:"status"`
	Tags        map[string]string `json:"tags"`
	Operations  []string          `json:"operations"`
}

// Span represents a single span in a trace
type Span struct {
	SpanID      string                 `json:"span_id"`
	TraceID     string                 `json:"trace_id"`
	ParentID    string                 `json:"parent_id,omitempty"`
	Operation   string                 `json:"operation"`
	Service     string                 `json:"service"`
	StartTime   time.Time              `json:"start_time"`
	EndTime     time.Time              `json:"end_time"`
	Duration    time.Duration          `json:"duration"`
	Status      SpanStatus             `json:"status"`
	Tags        map[string]string      `json:"tags"`
	Logs        []*SpanLog             `json:"logs"`
}

// TraceStatus represents the status of a trace
type TraceStatus string

const (
	TraceStatusOK    TraceStatus = "ok"
	TraceStatusError TraceStatus = "error"
	TraceStatusTimeout TraceStatus = "timeout"
)

// SpanStatus represents the status of a span
type SpanStatus string

const (
	SpanStatusOK    SpanStatus = "ok"
	SpanStatusError SpanStatus = "error"
)

// SpanLog represents a log entry within a span
type SpanLog struct {
	Timestamp time.Time              `json:"timestamp"`
	Fields    map[string]interface{} `json:"fields"`
}

// TraceSampler determines which traces to sample
type TraceSampler interface {
	Sample(traceID string, operation string) bool
	Name() string
}

// TraceExporter exports traces to external systems
type TraceExporter interface {
	Export(ctx context.Context, traces []*Trace) error
	Name() string
}

// ErrorEvent represents a system error event
type ErrorEvent struct {
	ID          string                 `json:"id"`
	Timestamp   time.Time              `json:"timestamp"`
	Level       LogLevel               `json:"level"`
	Component   string                 `json:"component"`
	Message     string                 `json:"message"`
	Error       string                 `json:"error"`
	Context     map[string]interface{} `json:"context"`
	TraceID     string                 `json:"trace_id,omitempty"`
	SpanID      string                 `json:"span_id,omitempty"`
	Count       int                    `json:"count"`
	FirstSeen   time.Time              `json:"first_seen"`
	LastSeen    time.Time              `json:"last_seen"`
}

// NewMonitoringSystem creates a comprehensive monitoring system
func NewMonitoringSystem(config *config.Config) (*MonitoringSystem, error) {
	if config == nil {
		return nil, fmt.Errorf("config is required")
	}

	ms := &MonitoringSystem{
		config:          config,
		monitoringPort:  8080,
		updateInterval:  30 * time.Second,
		retentionPeriod: 24 * time.Hour,
	}

	// Initialize components
	if err := ms.initializeComponents(); err != nil {
		return nil, fmt.Errorf("failed to initialize monitoring components: %w", err)
	}

	return ms, nil
}

// initializeComponents initializes all monitoring components
func (ms *MonitoringSystem) initializeComponents() error {
	// Initialize metrics collector
	ms.metrics = &MetricsCollector{
		timeSeries:    make(map[string]*TimeSeries),
		counters:      make(map[string]*Counter),
		gauges:        make(map[string]*Gauge),
		histograms:    make(map[string]*Histogram),
		customMetrics: make(map[string]*CustomMetric),
		aggregatedStats: &AggregatedStatistics{
			LastUpdated: time.Now(),
		},
		exporters:     []MetricsExporter{},
		lastCollection: time.Now(),
	}

	// Initialize health check manager
	ms.healthChecks = &HealthCheckManager{
		healthChecks: make(map[string]*HealthCheck),
		checkResults: make(map[string]*HealthCheckResult),
		schedules:    make(map[string]*HealthCheckSchedule),
		running:      false,
	}

	// Initialize alert manager
	ms.alertManager = &AlertManager{
		alertRules:   make(map[string]*AlertRule),
		activeAlerts: make(map[string]*Alert),
		alertHistory: []*Alert{},
		notifiers:    []AlertNotifier{},
		silences:     make(map[string]*AlertSilence),
		running:      false,
	}

	// Initialize dashboard server
	ms.dashboard = &DashboardServer{
		dashboards:  make(map[string]*Dashboard),
		widgets:     make(map[string]*Widget),
		customPages: make(map[string]*CustomPage),
		running:     false,
		port:        ms.monitoringPort,
	}

	// Initialize log manager
	ms.logManager = &LogManager{
		logSources:   make(map[string]*LogSource),
		logEntries:   []*LogEntry{},
		logAnalyzers: []LogAnalyzer{},
		retentionPolicy: &LogRetentionPolicy{
			RetentionPeriod: 7 * 24 * time.Hour,
			MaxEntries:      1000000,
			CompressionAge:  24 * time.Hour,
			ArchiveAge:      7 * 24 * time.Hour,
			Rules:           []*RetentionRule{},
		},
		running: false,
	}

	// Initialize trace manager
	ms.traceManager = &TraceManager{
		traces:    make(map[string]*Trace),
		spans:     make(map[string]*Span),
		samplers:  []TraceSampler{},
		exporters: []TraceExporter{},
		running:   false,
	}

	// Register default health checks
	ms.registerDefaultHealthChecks()

	// Register default alert rules
	ms.registerDefaultAlertRules()

	// Create default dashboards
	ms.createDefaultDashboards()

	return nil
}

// Start starts the monitoring system
func (ms *MonitoringSystem) Start(ctx context.Context) error {
	ms.mu.Lock()
	if ms.running {
		ms.mu.Unlock()
		return fmt.Errorf("monitoring system already running")
	}
	ms.running = true
	ms.mu.Unlock()

	// Start metrics collection
	go ms.metricsCollectionWorker(ctx)

	// Start health check manager
	ms.healthChecks.running = true
	go ms.healthCheckWorker(ctx)

	// Start alert manager
	ms.alertManager.running = true
	go ms.alertWorker(ctx)

	// Start log manager
	ms.logManager.running = true
	go ms.logWorker(ctx)

	// Start trace manager
	ms.traceManager.running = true
	go ms.traceWorker(ctx)

	// Start dashboard server
	if err := ms.startDashboardServer(); err != nil {
		return fmt.Errorf("failed to start dashboard server: %w", err)
	}

	return nil
}

// Stop stops the monitoring system
func (ms *MonitoringSystem) Stop() error {
	ms.mu.Lock()
	defer ms.mu.Unlock()

	ms.running = false
	ms.healthChecks.running = false
	ms.alertManager.running = false
	ms.logManager.running = false
	ms.traceManager.running = false

	// Stop dashboard server
	if ms.dashboard.server != nil {
		return ms.dashboard.server.Shutdown(context.Background())
	}

	return nil
}

// GetMetrics returns current system metrics
func (ms *MonitoringSystem) GetMetrics() (*AggregatedStatistics, error) {
	ms.metrics.mu.RLock()
	defer ms.metrics.mu.RUnlock()

	return ms.metrics.aggregatedStats, nil
}

// GetHealthStatus returns current health status
func (ms *MonitoringSystem) GetHealthStatus() (map[string]*HealthCheckResult, error) {
	ms.healthChecks.mu.RLock()
	defer ms.healthChecks.mu.RUnlock()

	results := make(map[string]*HealthCheckResult)
	for name, result := range ms.healthChecks.checkResults {
		results[name] = result
	}

	return results, nil
}

// GetActiveAlerts returns currently active alerts
func (ms *MonitoringSystem) GetActiveAlerts() ([]*Alert, error) {
	ms.alertManager.mu.RLock()
	defer ms.alertManager.mu.RUnlock()

	alerts := make([]*Alert, 0, len(ms.alertManager.activeAlerts))
	for _, alert := range ms.alertManager.activeAlerts {
		alerts = append(alerts, alert)
	}

	// Sort by severity and timestamp
	sort.Slice(alerts, func(i, j int) bool {
		if alerts[i].Severity != alerts[j].Severity {
			return ms.severityWeight(alerts[i].Severity) > ms.severityWeight(alerts[j].Severity)
		}
		return alerts[i].StartsAt.After(alerts[j].StartsAt)
	})

	return alerts, nil
}

// RecordMetric records a custom metric
func (ms *MonitoringSystem) RecordMetric(name string, value float64, labels map[string]string) error {
	ms.metrics.mu.Lock()
	defer ms.metrics.mu.Unlock()

	// Create or update gauge
	if gauge, exists := ms.metrics.gauges[name]; exists {
		gauge.Value = value
		gauge.LastUpdated = time.Now()
		if labels != nil {
			gauge.Labels = labels
		}
	} else {
		ms.metrics.gauges[name] = &Gauge{
			Name:        name,
			Value:       value,
			Min:         value,
			Max:         value,
			Average:     value,
			Labels:      labels,
			LastUpdated: time.Now(),
		}
	}

	return nil
}

// Background workers (placeholder implementations)

func (ms *MonitoringSystem) metricsCollectionWorker(ctx context.Context) {
	ticker := time.NewTicker(ms.updateInterval)
	defer ticker.Stop()

	for {
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
			if ms.running {
				ms.collectSystemMetrics()
			}
		}
	}
}

func (ms *MonitoringSystem) healthCheckWorker(ctx context.Context) {
	ticker := time.NewTicker(30 * time.Second)
	defer ticker.Stop()

	for {
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
			if ms.healthChecks.running {
				ms.runHealthChecks(ctx)
			}
		}
	}
}

func (ms *MonitoringSystem) alertWorker(ctx context.Context) {
	ticker := time.NewTicker(10 * time.Second)
	defer ticker.Stop()

	for {
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
			if ms.alertManager.running {
				ms.evaluateAlertRules(ctx)
			}
		}
	}
}

func (ms *MonitoringSystem) logWorker(ctx context.Context) {
	ticker := time.NewTicker(60 * time.Second)
	defer ticker.Stop()

	for {
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
			if ms.logManager.running {
				ms.analyzeLogs(ctx)
			}
		}
	}
}

func (ms *MonitoringSystem) traceWorker(ctx context.Context) {
	ticker := time.NewTicker(30 * time.Second)
	defer ticker.Stop()

	for {
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
			if ms.traceManager.running {
				ms.processTraces(ctx)
			}
		}
	}
}

func (ms *MonitoringSystem) startDashboardServer() error {
	mux := http.NewServeMux()

	// API endpoints
	mux.HandleFunc("/api/metrics", ms.handleMetrics)
	mux.HandleFunc("/api/health", ms.handleHealth)
	mux.HandleFunc("/api/alerts", ms.handleAlerts)
	mux.HandleFunc("/api/dashboards", ms.handleDashboards)

	// Dashboard UI (placeholder)
	mux.HandleFunc("/", ms.handleDashboard)

	ms.dashboard.server = &http.Server{
		Addr:    fmt.Sprintf(":%d", ms.dashboard.port),
		Handler: mux,
	}

	go func() {
		if err := ms.dashboard.server.ListenAndServe(); err != http.ErrServerClosed {
			// Log error
		}
	}()

	ms.dashboard.running = true
	return nil
}

// HTTP handlers (placeholder implementations)

func (ms *MonitoringSystem) handleMetrics(w http.ResponseWriter, r *http.Request) {
	metrics, err := ms.GetMetrics()
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(metrics)
}

func (ms *MonitoringSystem) handleHealth(w http.ResponseWriter, r *http.Request) {
	health, err := ms.GetHealthStatus()
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(health)
}

func (ms *MonitoringSystem) handleAlerts(w http.ResponseWriter, r *http.Request) {
	alerts, err := ms.GetActiveAlerts()
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(alerts)
}

func (ms *MonitoringSystem) handleDashboards(w http.ResponseWriter, r *http.Request) {
	ms.dashboard.mu.RLock()
	dashboards := make([]*Dashboard, 0, len(ms.dashboard.dashboards))
	for _, dashboard := range ms.dashboard.dashboards {
		dashboards = append(dashboards, dashboard)
	}
	ms.dashboard.mu.RUnlock()

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(dashboards)
}

func (ms *MonitoringSystem) handleDashboard(w http.ResponseWriter, r *http.Request) {
	// Placeholder dashboard HTML
	html := `
	<!DOCTYPE html>
	<html>
	<head><title>BZZZ SLURP Monitoring</title></head>
	<body>
	<h1>BZZZ SLURP Distributed Context Monitoring</h1>
	<p>Monitoring dashboard placeholder</p>
	</body>
	</html>
	`
	w.Header().Set("Content-Type", "text/html")
	w.Write([]byte(html))
}

// Helper methods (placeholder implementations)

func (ms *MonitoringSystem) collectSystemMetrics() {
	// Collect system metrics
	ms.metrics.aggregatedStats.SystemOverview = &SystemOverview{
		TotalNodes:          1, // Placeholder
		HealthyNodes:        1,
		TotalContexts:       0,
		DistributedContexts: 0,
		ReplicationFactor:   3.0,
		SystemUptime:        time.Since(time.Now()),
		ClusterVersion:      "1.0.0",
		LastRestart:         time.Now(),
	}

	ms.metrics.aggregatedStats.LastUpdated = time.Now()
}

func (ms *MonitoringSystem) runHealthChecks(ctx context.Context) {
	// Run scheduled health checks
}

func (ms *MonitoringSystem) evaluateAlertRules(ctx context.Context) {
	// Evaluate alert rules against current metrics
}

func (ms *MonitoringSystem) analyzeLogs(ctx context.Context) {
	// Analyze logs for patterns and anomalies
}

func (ms *MonitoringSystem) processTraces(ctx context.Context) {
	// Process distributed traces
}

func (ms *MonitoringSystem) registerDefaultHealthChecks() {
	// Register default health checks
}

func (ms *MonitoringSystem) registerDefaultAlertRules() {
	// Register default alert rules
}

func (ms *MonitoringSystem) createDefaultDashboards() {
	// Create default dashboards
}

func (ms *MonitoringSystem) severityWeight(severity AlertSeverity) int {
	switch severity {
	case SeverityCritical:
		return 4
	case SeverityError:
		return 3
	case SeverityWarning:
		return 2
	case SeverityInfo:
		return 1
	default:
		return 0
	}
}