/**
 * Performance Helper Utilities
 * Extracted helper functions for performance metrics formatting and calculations
 */
import type { PerformanceMetrics } from "../../performance/PerformanceMonitor.js";
import type { BenchmarkComparison, PerformanceAnomaly } from "../../performance/PerformanceAnalytics.js";
/**
 * Performance alert interface
 */
export interface PerformanceAlert {
    severity: string;
    category: string;
    message: string;
    metric: string;
    actualValue: number;
    threshold: number;
    timestamp: number;
}
/**
 * Calculate overall health status from metrics
 */
export declare function calculateHealthStatus(metrics: PerformanceMetrics): string;
/**
 * Calculate performance score from metrics
 */
export declare function calculatePerformanceScore(metrics: PerformanceMetrics): number;
/**
 * Calculate cache efficiency rating
 */
export declare function calculateCacheEfficiency(cacheMetrics: PerformanceMetrics["cache"]): string;
/**
 * Format uptime in human-readable format
 */
export declare function formatUptime(uptimeMs: number): string;
/**
 * Parse timeframe string to milliseconds
 */
export declare function parseTimeframe(timeframe: string): number;
/**
 * Extract metric value from data point
 */
export declare function extractMetricValue(dataPoint: PerformanceMetrics, metric: string): number;
/**
 * Process historical data for charting
 */
export declare function processHistoricalDataForChart(data: PerformanceMetrics[], requestedMetrics?: string[]): Record<string, unknown>;
/**
 * Calculate average of number array
 */
export declare function calculateAverage(values: number[]): number;
/**
 * Format benchmark status with emoji
 */
export declare function formatBenchmarkStatus(status: string): string;
/**
 * Get benchmark improvement description
 */
export declare function getBenchmarkImprovementDescription(benchmark: BenchmarkComparison): string;
/**
 * Calculate overall ranking from benchmarks
 */
export declare function calculateOverallRanking(benchmarks: BenchmarkComparison[]): {
    percentile: number;
    status: string;
};
/**
 * Format alert message
 */
export declare function formatAlertMessage(alert: PerformanceAlert): string;
/**
 * Format anomaly description
 */
export declare function formatAnomalyDescription(anomaly: PerformanceAnomaly): string;
/**
 * Calculate alert status from summaries
 */
export declare function calculateAlertStatus(alertSummary: {
    critical: number;
    error: number;
    warning: number;
}, anomalySummary: {
    critical: number;
    major: number;
    moderate: number;
    minor: number;
}): string;
/**
 * Format priority with emoji
 */
export declare function formatPriority(priority: string): string;
/**
 * Format effort with emoji
 */
export declare function formatEffort(effort: string): string;
/**
 * Calculate estimated impact from recommendations
 */
export declare function calculateEstimatedImpact(recommendations: Array<{
    priority: string;
}>): string;
/**
 * Convert metrics data to CSV format
 */
export declare function convertToCSV(data: {
    currentMetrics: PerformanceMetrics;
}): string;
/**
 * Create summary report from data
 */
export declare function createSummaryReport(data: {
    currentMetrics: PerformanceMetrics;
    analytics?: {
        insights?: unknown[];
    };
}): Record<string, unknown>;
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