import { TrendAnalysis, MetricTrend } from '../types/sonarqube.js';
/**
 * Format duration from minutes to human readable format
 */
export declare function formatDuration(minutes: number): string;
/**
 * Parse technical debt string to minutes
 */
export declare function parseTechnicalDebt(debt: string): number;
/**
 * Calculate percentage change between two values
 */
export declare function calculatePercentageChange(oldValue: number, newValue: number): number;
/**
 * Determine trend direction from percentage change
 */
export declare function getTrendDirection(change: number): 'UP' | 'DOWN' | 'STABLE';
/**
 * Format percentage with proper sign and precision
 */
export declare function formatPercentage(value: number, decimals?: number): string;
/**
 * Calculate trend analysis from metric history
 */
export declare function calculateTrends(metricTrends: MetricTrend[]): TrendAnalysis;
/**
 * Get severity level as number for sorting
 */
export declare function getSeverityLevel(severity: string): number;
/**
 * Get rating color for quality gates and ratings
 */
export declare function getRatingColor(rating: string): string;
/**
 * Get status emoji for various statuses
 */
export declare function getStatusEmoji(status: string): string;
/**
 * Format large numbers with appropriate units
 */
export declare function formatNumber(num: number): string;
/**
 * Get priority level for issues based on type and severity
 */
export declare function getIssuePriority(type: string, severity: string): number;
/**
 * Sort issues by priority (highest first)
 */
export declare function sortIssuesByPriority<T extends {
    type: string;
    severity: string;
}>(issues: T[]): T[];
/**
 * Validate SonarQube project key format
 */
export declare function isValidProjectKey(key: string): boolean;
/**
 * Parse quality gate operator to human readable text
 */
export declare function formatQualityGateOperator(operator: string): string;
/**
 * Format metric name to human readable text
 */
export declare function formatMetricName(metric: string): string;
/**
 * Create a summary text for analysis results
 */
export declare function createAnalysisSummary(data: {
    projectName: string;
    totalIssues?: number;
    criticalIssues?: number;
    coverage?: number;
    duplications?: number;
    technicalDebt?: string;
    qualityGate?: string;
}): string;
/**
 * Generate recommendations based on analysis results
 */
export declare function generateRecommendations(data: {
    coverage?: number;
    duplications?: number;
    criticalIssues?: number;
    vulnerabilities?: number;
    technicalDebtMinutes?: number;
}): string[];
/**
 * Format issue type for display
 */
export declare function formatIssueType(type: string): string;
/**
 * Format severity for display
 */
export declare function formatSeverity(severity: string): string;
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