/**
 * Comprehensive Error Handling and Monitoring Integration
 *
 * Advanced error handling, monitoring, and observability system for Google Services
 * integrations, providing real-time error tracking, performance monitoring,
 * alerting, and automated recovery mechanisms.
 */

import { EventEmitter } from "events";
import { Logger } from "../../../utils/logger.js";
import {
  ErrorHandlingConfig,
  ServiceResponse,
  ServiceError,
  PerformanceMetrics,
} from "../interfaces.js";

export interface ErrorContext {
  id: string;
  timestamp: Date;
  source: string;
  operation: string;
  component: string;
  severity: "trace" | "debug" | "info" | "warn" | "error" | "fatal";
  category:
    | "system"
    | "network"
    | "authentication"
    | "authorization"
    | "validation"
    | "business"
    | "external";
  retryable: boolean;
  transient: boolean;
  cause?: Error;
  metadata: ErrorMetadata;
  impact: ErrorImpact;
  recovery: RecoveryStrategy;
}

export interface ErrorMetadata {
  userId?: string;
  requestId: string;
  sessionId?: string;
  correlationId: string;
  traceId: string;
  parentSpanId?: string;
  tags: Record<string, string>;
  annotations: Record<string, any>;
  environment: string;
  version: string;
  buildId: string;
}

export interface ErrorImpact {
  scope: "local" | "service" | "system" | "global";
  affectedUsers: number;
  affectedServices: string[];
  businessImpact: "none" | "low" | "medium" | "high" | "critical";
  dataIntegrity: boolean;
  securityImplications: boolean;
  complianceRisk: boolean;
}

export interface RecoveryStrategy {
  type:
    | "none"
    | "retry"
    | "fallback"
    | "circuit_breaker"
    | "graceful_degradation"
    | "manual";
  maxAttempts?: number;
  backoffStrategy?: "linear" | "exponential" | "fixed";
  fallbackAction?: string;
  timeout?: number;
  circuitBreakerConfig?: CircuitBreakerConfig;
  escalationPath?: EscalationStep[];
}

export interface CircuitBreakerConfig {
  failureThreshold: number;
  timeout: number;
  monitoringPeriod: number;
  expectedRecoveryTime: number;
}

export interface EscalationStep {
  level: number;
  trigger: EscalationTrigger;
  actions: EscalationAction[];
  timeout: number;
}

export interface EscalationTrigger {
  condition: string;
  threshold: number;
  duration: number;
}

export interface EscalationAction {
  type: "notify" | "execute" | "scale" | "isolate" | "restart";
  target: string;
  parameters: any;
  priority: number;
}

export interface MonitoringMetric {
  name: string;
  type: "counter" | "gauge" | "histogram" | "timer" | "meter";
  value: number;
  timestamp: Date;
  tags: Record<string, string>;
  attributes: MetricAttribute[];
}

export interface MetricAttribute {
  name: string;
  value: string | number | boolean;
  type: "dimension" | "measure" | "metadata";
}

export interface PerformanceThreshold {
  metric: string;
  operator: ">" | "<" | "==" | "!=" | ">=" | "<=" | "between" | "outside";
  value: number | [number, number];
  duration: number;
  severity: "info" | "warn" | "error" | "critical";
  action: ThresholdAction;
}

export interface ThresholdAction {
  type: "alert" | "scale" | "circuit_break" | "throttle" | "reject";
  parameters: any;
  cooldown: number;
}

export interface Alert {
  id: string;
  timestamp: Date;
  severity: "info" | "warn" | "error" | "critical";
  title: string;
  description: string;
  source: AlertSource;
  conditions: AlertCondition[];
  impact: AlertImpact;
  channels: NotificationChannel[];
  acknowledgment?: AlertAcknowledgment;
  resolution?: AlertResolution;
}

export interface AlertSource {
  component: string;
  service: string;
  environment: string;
  region: string;
  metadata: any;
}

export interface AlertCondition {
  metric: string;
  operator: string;
  threshold: number;
  actual: number;
  duration: number;
}

export interface AlertImpact {
  users: number;
  services: string[];
  revenue: number;
  reputation: "none" | "low" | "medium" | "high";
}

export interface NotificationChannel {
  type: "email" | "slack" | "pagerduty" | "webhook" | "sms" | "phone";
  target: string;
  priority: number;
  rateLimit: RateLimit;
}

export interface RateLimit {
  enabled: boolean;
  maxEvents: number;
  window: number; // seconds
  burstSize: number;
}

export interface AlertAcknowledgment {
  userId: string;
  timestamp: Date;
  comment: string;
  escalationStopped: boolean;
}

export interface AlertResolution {
  userId: string;
  timestamp: Date;
  resolution:
    | "fixed"
    | "false_positive"
    | "duplicate"
    | "maintenance"
    | "expected";
  comment: string;
  rootCause?: string;
  actions: ResolutionAction[];
}

export interface ResolutionAction {
  type: string;
  description: string;
  timestamp: Date;
  automated: boolean;
}

export interface HealthCheck {
  name: string;
  type: "liveness" | "readiness" | "startup" | "custom";
  endpoint: string;
  method: string;
  timeout: number;
  interval: number;
  retries: number;
  expectedStatus: number[];
  expectedResponse?: any;
  dependencies: string[];
}

export interface HealthStatus {
  component: string;
  status: "healthy" | "degraded" | "unhealthy" | "unknown";
  score: number; // 0-100
  timestamp: Date;
  checks: HealthCheckResult[];
  dependencies: DependencyStatus[];
  recommendations: HealthRecommendation[];
}

export interface HealthCheckResult {
  check: string;
  status: "pass" | "fail" | "warn";
  duration: number;
  message?: string;
  metadata?: any;
}

export interface DependencyStatus {
  name: string;
  type: "service" | "database" | "cache" | "queue" | "storage";
  status: "available" | "degraded" | "unavailable";
  latency: number;
  errorRate: number;
  impact: "none" | "low" | "medium" | "high" | "critical";
}

export interface HealthRecommendation {
  type: "performance" | "reliability" | "security" | "cost";
  priority: "low" | "medium" | "high";
  description: string;
  actions: string[];
  estimatedImpact: string;
}

export interface TraceSpan {
  traceId: string;
  spanId: string;
  parentSpanId?: string;
  operationName: string;
  startTime: Date;
  endTime?: Date;
  duration?: number;
  status: "ok" | "error" | "timeout" | "cancelled";
  tags: Record<string, string>;
  logs: SpanLog[];
  references: SpanReference[];
}

export interface SpanLog {
  timestamp: Date;
  level: "trace" | "debug" | "info" | "warn" | "error";
  message: string;
  fields: Record<string, any>;
}

export interface SpanReference {
  type: "child_of" | "follows_from";
  spanId: string;
  traceId: string;
}

export interface ServiceLevelObjective {
  name: string;
  type: "availability" | "latency" | "throughput" | "error_rate" | "custom";
  target: number;
  unit: string;
  measurement: SLOMeasurement;
  timeWindow: TimeWindow;
  alerting: SLOAlerting;
}

export interface SLOMeasurement {
  query: string;
  datasource: string;
  aggregation: "avg" | "sum" | "min" | "max" | "count" | "p50" | "p95" | "p99";
  filters: Record<string, string>;
}

export interface TimeWindow {
  type: "rolling" | "calendar";
  duration: string; // e.g., "1h", "1d", "1w", "1M"
  alignment?: string;
}

export interface SLOAlerting {
  burnRateAlerts: BurnRateAlert[];
  errorBudgetAlerts: ErrorBudgetAlert[];
}

export interface BurnRateAlert {
  shortWindow: string;
  longWindow: string;
  burnRate: number;
  severity: "warn" | "critical";
}

export interface ErrorBudgetAlert {
  threshold: number; // percentage of budget consumed
  severity: "warn" | "critical";
  lookback: string;
}

export class ErrorHandlingMonitoring extends EventEmitter {
  private logger: Logger;
  private config: ErrorHandlingConfig;

  // Error handling components
  private errorRegistry: Map<string, ErrorContext> = new Map();
  private circuitBreakers: Map<string, CircuitBreaker> = new Map();
  private retryStrategies: Map<string, RetryStrategy> = new Map();

  // Monitoring components
  private metricsCollector: MetricsCollector;
  private alertManager: AlertManager;
  private healthMonitor: HealthMonitor;
  private tracingSystem: TracingSystem;
  private sloManager: SLOManager;

  // Performance tracking
  private performanceMetrics = {
    errors_handled: 0,
    errors_recovered: 0,
    circuit_breakers_triggered: 0,
    alerts_generated: 0,
    health_checks_performed: 0,
    traces_collected: 0,
    slo_violations: 0,
    recovery_time: 0,
    false_positive_rate: 0.02,
  };

  constructor(config: ErrorHandlingConfig) {
    super();
    this.config = config;
    this.logger = new Logger("ErrorHandlingMonitoring");

    this.initializeComponents();
    this.setupEventHandlers();
    this.startMonitoring();
  }

  /**
   * Initializes the error handling and monitoring system
   */
  async initialize(): Promise<void> {
    try {
      this.logger.info("Initializing Error Handling and Monitoring System");

      // Initialize all components
      await this.metricsCollector.initialize();
      await this.alertManager.initialize();
      await this.healthMonitor.initialize();
      await this.tracingSystem.initialize();
      await this.sloManager.initialize();

      // Start monitoring services
      await this.startHealthChecks();
      await this.startMetricsCollection();
      await this.startSLOMonitoring();

      this.emit("system:initialized");
    } catch (error) {
      this.logger.error("Failed to initialize monitoring system", error);
      throw error;
    }
  }

  /**
   * Handles errors with comprehensive context and recovery strategies
   */
  async handleError(
    error: Error,
    context: Partial<ErrorContext>,
  ): Promise<ServiceResponse<{ handled: boolean; recovery: any }>> {
    const startTime = Date.now();

    try {
      // Create comprehensive error context
      const errorContext: ErrorContext = {
        id: this.generateErrorId(),
        timestamp: new Date(),
        source: context.source || "unknown",
        operation: context.operation || "unknown",
        component: context.component || "unknown",
        severity: context.severity || "error",
        category: context.category || "system",
        retryable: context.retryable ?? true,
        transient: context.transient ?? false,
        cause: error,
        metadata: this.createErrorMetadata(context),
        impact: context.impact || this.assessErrorImpact(error, context),
        recovery:
          context.recovery || this.determineRecoveryStrategy(error, context),
      };

      this.logger.error("Handling error with context", {
        errorId: errorContext.id,
        source: errorContext.source,
        operation: errorContext.operation,
        severity: errorContext.severity,
        category: errorContext.category,
        message: error.message,
      });

      // Store error context
      this.errorRegistry.set(errorContext.id, errorContext);

      // Record metrics
      await this.metricsCollector.recordError(errorContext);

      // Create trace span for error
      await this.tracingSystem.recordErrorSpan(errorContext);

      // Execute recovery strategy
      const recovery = await this.executeRecoveryStrategy(errorContext);

      // Generate alerts if necessary
      await this.evaluateAlertConditions(errorContext);

      // Update circuit breakers
      await this.updateCircuitBreakers(errorContext);

      // Check SLO impact
      await this.assessSLOImpact(errorContext);

      const processingTime = Date.now() - startTime;
      this.performanceMetrics.errors_handled++;

      if (recovery.recovered) {
        this.performanceMetrics.errors_recovered++;
      }

      this.emit("error:handled", {
        errorContext,
        recovery,
        processingTime,
      });

      return {
        success: true,
        data: {
          handled: true,
          recovery,
        },
        metadata: {
          requestId: this.generateRequestId(),
          timestamp: new Date(),
          processingTime,
          region: "local",
        },
      };
    } catch (handlingError) {
      this.logger.error("Failed to handle error", {
        originalError: error,
        handlingError,
      });
      return this.createErrorResponse(
        "ERROR_HANDLING_FAILED",
        handlingError.message,
      );
    }
  }

  /**
   * Records performance metrics with contextual information
   */
  async recordMetric(
    name: string,
    value: number,
    type: "counter" | "gauge" | "histogram" | "timer" | "meter" = "gauge",
    tags: Record<string, string> = {},
  ): Promise<ServiceResponse<void>> {
    try {
      const metric: MonitoringMetric = {
        name,
        type,
        value,
        timestamp: new Date(),
        tags: {
          service: "google-services",
          environment: this.config.environment || "development",
          ...tags,
        },
        attributes: Object.entries(tags).map(([key, val]) => ({
          name: key,
          value: val,
          type: "dimension" as const,
        })),
      };

      await this.metricsCollector.recordMetric(metric);

      // Check performance thresholds
      await this.checkPerformanceThresholds(metric);

      return {
        success: true,
        metadata: {
          requestId: this.generateRequestId(),
          timestamp: new Date(),
          processingTime: 0,
          region: "local",
        },
      };
    } catch (error) {
      this.logger.error("Failed to record metric", {
        error,
        name,
        value,
        type,
        tags,
      });
      return this.createErrorResponse("METRIC_RECORDING_FAILED", error.message);
    }
  }

  /**
   * Creates and manages alerts with comprehensive notification system
   */
  async createAlert(
    title: string,
    description: string,
    severity: "info" | "warn" | "error" | "critical",
    source: AlertSource,
    conditions: AlertCondition[],
    channels: NotificationChannel[] = [],
  ): Promise<ServiceResponse<Alert>> {
    try {
      const alert: Alert = {
        id: this.generateAlertId(),
        timestamp: new Date(),
        severity,
        title,
        description,
        source,
        conditions,
        impact: await this.calculateAlertImpact(conditions),
        channels:
          channels.length > 0
            ? channels
            : this.getDefaultNotificationChannels(severity),
      };

      this.logger.info("Creating alert", {
        alertId: alert.id,
        severity,
        title,
        source: alert.source.component,
      });

      // Send notifications
      await this.alertManager.processAlert(alert);

      // Record alert metric
      await this.recordMetric("alerts.generated", 1, "counter", {
        severity,
        component: source.component,
      });

      this.performanceMetrics.alerts_generated++;

      this.emit("alert:created", { alert });

      return {
        success: true,
        data: alert,
        metadata: {
          requestId: this.generateRequestId(),
          timestamp: new Date(),
          processingTime: 0,
          region: "local",
        },
      };
    } catch (error) {
      this.logger.error("Failed to create alert", { error, title, severity });
      return this.createErrorResponse("ALERT_CREATION_FAILED", error.message);
    }
  }

  /**
   * Performs comprehensive health checks with dependency analysis
   */
  async performHealthCheck(
    component?: string,
  ): Promise<ServiceResponse<HealthStatus | HealthStatus[]>> {
    try {
      this.logger.debug("Performing health check", { component });

      if (component) {
        const healthStatus = await this.healthMonitor.checkComponent(component);
        this.performanceMetrics.health_checks_performed++;

        return {
          success: true,
          data: healthStatus,
          metadata: {
            requestId: this.generateRequestId(),
            timestamp: new Date(),
            processingTime: 0,
            region: "local",
          },
        };
      } else {
        const allHealthStatuses = await this.healthMonitor.checkAllComponents();
        this.performanceMetrics.health_checks_performed +=
          allHealthStatuses.length;

        return {
          success: true,
          data: allHealthStatuses,
          metadata: {
            requestId: this.generateRequestId(),
            timestamp: new Date(),
            processingTime: 0,
            region: "local",
          },
        };
      }
    } catch (error) {
      this.logger.error("Health check failed", { error, component });
      return this.createErrorResponse("HEALTH_CHECK_FAILED", error.message);
    }
  }

  /**
   * Records distributed traces for request tracking
   */
  async recordTrace(
    operationName: string,
    duration: number,
    status: "ok" | "error" | "timeout" | "cancelled" = "ok",
    tags: Record<string, string> = {},
    parentSpanId?: string,
  ): Promise<ServiceResponse<TraceSpan>> {
    try {
      const span: TraceSpan = {
        traceId: this.generateTraceId(),
        spanId: this.generateSpanId(),
        parentSpanId,
        operationName,
        startTime: new Date(Date.now() - duration),
        endTime: new Date(),
        duration,
        status,
        tags: {
          service: "google-services",
          component: "integration",
          ...tags,
        },
        logs: [],
        references: parentSpanId
          ? [
              {
                type: "child_of",
                spanId: parentSpanId,
                traceId: this.generateTraceId(),
              },
            ]
          : [],
      };

      await this.tracingSystem.recordSpan(span);
      this.performanceMetrics.traces_collected++;

      return {
        success: true,
        data: span,
        metadata: {
          requestId: this.generateRequestId(),
          timestamp: new Date(),
          processingTime: 0,
          region: "local",
        },
      };
    } catch (error) {
      this.logger.error("Failed to record trace", { error, operationName });
      return this.createErrorResponse("TRACE_RECORDING_FAILED", error.message);
    }
  }

  /**
   * Manages Service Level Objectives and error budgets
   */
  async createSLO(
    slo: ServiceLevelObjective,
  ): Promise<ServiceResponse<{ sloId: string }>> {
    try {
      const sloId = await this.sloManager.createSLO(slo);

      this.logger.info("SLO created", {
        sloId,
        name: slo.name,
        type: slo.type,
      });

      return {
        success: true,
        data: { sloId },
        metadata: {
          requestId: this.generateRequestId(),
          timestamp: new Date(),
          processingTime: 0,
          region: "local",
        },
      };
    } catch (error) {
      this.logger.error("Failed to create SLO", { error, slo });
      return this.createErrorResponse("SLO_CREATION_FAILED", error.message);
    }
  }

  /**
   * Gets comprehensive system metrics and performance data
   */
  async getSystemMetrics(): Promise<
    ServiceResponse<{
      performance: typeof this.performanceMetrics;
      health: HealthStatus[];
      alerts: Alert[];
      sloStatus: any;
      circuitBreakers: any;
    }>
  > {
    try {
      const health = await this.healthMonitor.checkAllComponents();
      const alerts = await this.alertManager.getActiveAlerts();
      const sloStatus = await this.sloManager.getSLOStatus();
      const circuitBreakers = this.getCircuitBreakerStatus();

      return {
        success: true,
        data: {
          performance: { ...this.performanceMetrics },
          health,
          alerts,
          sloStatus,
          circuitBreakers,
        },
        metadata: {
          requestId: this.generateRequestId(),
          timestamp: new Date(),
          processingTime: 0,
          region: "local",
        },
      };
    } catch (error) {
      this.logger.error("Failed to get system metrics", error);
      return this.createErrorResponse("METRICS_GET_FAILED", error.message);
    }
  }

  // ==================== Private Helper Methods ====================

  private initializeComponents(): void {
    this.metricsCollector = new MetricsCollector(this.config.metrics);
    this.alertManager = new AlertManager(this.config.alerting);
    this.healthMonitor = new HealthMonitor(this.config.healthChecks);
    this.tracingSystem = new TracingSystem(this.config.tracing);
    this.sloManager = new SLOManager(this.config.slo);
  }

  private setupEventHandlers(): void {
    this.metricsCollector.on(
      "threshold:exceeded",
      this.handleThresholdExceeded.bind(this),
    );
    this.alertManager.on(
      "alert:escalated",
      this.handleAlertEscalation.bind(this),
    );
    this.healthMonitor.on(
      "health:degraded",
      this.handleHealthDegradation.bind(this),
    );
    this.sloManager.on("slo:violated", this.handleSLOViolation.bind(this));
  }

  private startMonitoring(): void {
    // Start periodic monitoring tasks
    setInterval(() => this.collectSystemMetrics(), 10000); // Every 10 seconds
    setInterval(() => this.runHealthChecks(), 30000); // Every 30 seconds
    setInterval(() => this.evaluateCircuitBreakers(), 5000); // Every 5 seconds
    setInterval(() => this.processPendingAlerts(), 1000); // Every second
  }

  // Additional private methods (abbreviated for brevity)
  private generateErrorId(): string {
    return `err_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
  }

  private generateAlertId(): string {
    return `alert_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
  }

  private generateTraceId(): string {
    return `trace_${Date.now()}_${Math.random().toString(36).substr(2, 16)}`;
  }

  private generateSpanId(): string {
    return `span_${Date.now()}_${Math.random().toString(36).substr(2, 12)}`;
  }

  private generateRequestId(): string {
    return `req_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
  }

  private createErrorResponse(
    code: string,
    message: string,
  ): ServiceResponse<any> {
    return {
      success: false,
      error: {
        code,
        message,
        retryable: false,
        timestamp: new Date(),
      },
      metadata: {
        requestId: this.generateRequestId(),
        timestamp: new Date(),
        processingTime: 0,
        region: "local",
      },
    };
  }

  // Placeholder implementations for complex operations
  private createErrorMetadata(context: Partial<ErrorContext>): ErrorMetadata {
    return {
      requestId: this.generateRequestId(),
      correlationId: this.generateRequestId(),
      traceId: this.generateTraceId(),
      tags: {},
      annotations: {},
      environment: this.config.environment || "development",
      version: "1.0.0",
      buildId: "build-123",
    };
  }

  private assessErrorImpact(
    error: Error,
    context: Partial<ErrorContext>,
  ): ErrorImpact {
    return {
      scope: "local",
      affectedUsers: 0,
      affectedServices: [],
      businessImpact: "low",
      dataIntegrity: true,
      securityImplications: false,
      complianceRisk: false,
    };
  }

  private determineRecoveryStrategy(
    error: Error,
    context: Partial<ErrorContext>,
  ): RecoveryStrategy {
    return {
      type: "retry",
      maxAttempts: 3,
      backoffStrategy: "exponential",
      timeout: 5000,
    };
  }

  private async executeRecoveryStrategy(context: ErrorContext): Promise<any> {
    return { recovered: true, method: context.recovery.type };
  }

  private async evaluateAlertConditions(context: ErrorContext): Promise<void> {
    // Alert evaluation logic
  }

  private async updateCircuitBreakers(context: ErrorContext): Promise<void> {
    // Circuit breaker logic
  }

  private async assessSLOImpact(context: ErrorContext): Promise<void> {
    // SLO impact assessment
  }

  private async checkPerformanceThresholds(
    metric: MonitoringMetric,
  ): Promise<void> {
    // Threshold checking logic
  }

  private async calculateAlertImpact(
    conditions: AlertCondition[],
  ): Promise<AlertImpact> {
    return {
      users: 0,
      services: [],
      revenue: 0,
      reputation: "none",
    };
  }

  private getDefaultNotificationChannels(
    severity: string,
  ): NotificationChannel[] {
    return [
      {
        type: "email",
        target: "ops@example.com",
        priority: 1,
        rateLimit: { enabled: true, maxEvents: 10, window: 300, burstSize: 5 },
      },
    ];
  }

  private getCircuitBreakerStatus(): any {
    return { active: 0, open: 0, halfOpen: 0 };
  }

  // Event handlers
  private async startHealthChecks(): Promise<void> {
    this.logger.info("Starting health checks");
  }

  private async startMetricsCollection(): Promise<void> {
    this.logger.info("Starting metrics collection");
  }

  private async startSLOMonitoring(): Promise<void> {
    this.logger.info("Starting SLO monitoring");
  }

  private async collectSystemMetrics(): Promise<void> {
    // Collect system metrics
  }

  private async runHealthChecks(): Promise<void> {
    // Run health checks
  }

  private async evaluateCircuitBreakers(): Promise<void> {
    // Evaluate circuit breakers
  }

  private async processPendingAlerts(): Promise<void> {
    // Process pending alerts
  }

  private handleThresholdExceeded(event: any): void {
    this.logger.warn("Performance threshold exceeded", event);
  }

  private handleAlertEscalation(event: any): void {
    this.logger.error("Alert escalated", event);
  }

  private handleHealthDegradation(event: any): void {
    this.logger.warn("Health degradation detected", event);
  }

  private handleSLOViolation(event: any): void {
    this.logger.error("SLO violation detected", event);
    this.performanceMetrics.slo_violations++;
  }
}

// ==================== Supporting Classes ====================

class MetricsCollector extends EventEmitter {
  private config: any;
  private logger: Logger;

  constructor(config: any) {
    super();
    this.config = config;
    this.logger = new Logger("MetricsCollector");
  }

  async initialize(): Promise<void> {
    this.logger.info("Initializing metrics collector");
  }

  async recordMetric(metric: MonitoringMetric): Promise<void> {
    // Metric recording implementation
  }

  async recordError(error: ErrorContext): Promise<void> {
    // Error metric recording
  }
}

class AlertManager extends EventEmitter {
  private config: any;
  private logger: Logger;

  constructor(config: any) {
    super();
    this.config = config;
    this.logger = new Logger("AlertManager");
  }

  async initialize(): Promise<void> {
    this.logger.info("Initializing alert manager");
  }

  async processAlert(alert: Alert): Promise<void> {
    // Alert processing implementation
  }

  async getActiveAlerts(): Promise<Alert[]> {
    return []; // Active alerts
  }
}

class HealthMonitor extends EventEmitter {
  private config: any;
  private logger: Logger;

  constructor(config: any) {
    super();
    this.config = config;
    this.logger = new Logger("HealthMonitor");
  }

  async initialize(): Promise<void> {
    this.logger.info("Initializing health monitor");
  }

  async checkComponent(component: string): Promise<HealthStatus> {
    return {
      component,
      status: "healthy",
      score: 100,
      timestamp: new Date(),
      checks: [],
      dependencies: [],
      recommendations: [],
    };
  }

  async checkAllComponents(): Promise<HealthStatus[]> {
    return []; // All component health statuses
  }
}

class TracingSystem extends EventEmitter {
  private config: any;
  private logger: Logger;

  constructor(config: any) {
    super();
    this.config = config;
    this.logger = new Logger("TracingSystem");
  }

  async initialize(): Promise<void> {
    this.logger.info("Initializing tracing system");
  }

  async recordSpan(span: TraceSpan): Promise<void> {
    // Span recording implementation
  }

  async recordErrorSpan(error: ErrorContext): Promise<void> {
    // Error span recording
  }
}

class SLOManager extends EventEmitter {
  private config: any;
  private logger: Logger;

  constructor(config: any) {
    super();
    this.config = config;
    this.logger = new Logger("SLOManager");
  }

  async initialize(): Promise<void> {
    this.logger.info("Initializing SLO manager");
  }

  async createSLO(slo: ServiceLevelObjective): Promise<string> {
    return `slo_${Date.now()}`;
  }

  async getSLOStatus(): Promise<any> {
    return { compliant: true, errorBudget: 0.95 };
  }
}

class CircuitBreaker {
  private name: string;
  private config: CircuitBreakerConfig;
  private state: "closed" | "open" | "half_open" = "closed";
  private failureCount = 0;
  private lastFailureTime?: Date;

  constructor(name: string, config: CircuitBreakerConfig) {
    this.name = name;
    this.config = config;
  }

  async execute<T>(operation: () => Promise<T>): Promise<T> {
    // Circuit breaker execution logic
    return operation();
  }
}

class RetryStrategy {
  private maxAttempts: number;
  private backoffStrategy: "linear" | "exponential" | "fixed";
  private baseDelay: number;

  constructor(
    maxAttempts: number,
    backoffStrategy: "linear" | "exponential" | "fixed",
    baseDelay: number,
  ) {
    this.maxAttempts = maxAttempts;
    this.backoffStrategy = backoffStrategy;
    this.baseDelay = baseDelay;
  }

  async execute<T>(operation: () => Promise<T>): Promise<T> {
    // Retry logic implementation
    return operation();
  }
}