/**
 * SLA Monitoring - Define and monitor service-level agreements
 */
import type { SuiteResult } from './types';
export interface SLAConfig {
    availability: number;
    latency_p95: number;
    cost_per_query: number;
    accuracy: number;
}
export interface SLACheckResult {
    config: SLAConfig;
    actual: {
        availability: number;
        latency_p95: number;
        cost_per_query: number;
        accuracy: number;
    };
    violations: SLAViolation[];
    passing: boolean;
}
export interface SLAViolation {
    metric: string;
    threshold: number;
    actual: number;
    unit: string;
}
/**
 * Load SLA config from YAML file.
 */
export declare function loadSLAConfig(configPath: string): SLAConfig;
/**
 * Compute percentile from array of numbers.
 */
export declare function percentile(arr: number[], p: number): number;
/**
 * Load report files from a directory.
 */
export declare function loadReports(dir: string): SuiteResult[];
/**
 * Check reports against SLA config.
 */
export declare function checkSLA(config: SLAConfig, reports: SuiteResult[]): SLACheckResult;
/**
 * Format SLA check results for console.
 */
export interface SLAMonitoringConfig {
    windowHours: number;
    alertThreshold: number;
    trend: 'degrading' | 'stable' | 'improving' | 'any';
}
export interface SLATrendPoint {
    timestamp: string;
    availability: number;
    latency_p95: number;
    cost_per_query: number;
    accuracy: number;
}
export interface SLATrendResult {
    metric: string;
    direction: 'degrading' | 'stable' | 'improving';
    slope: number;
    breachEta?: number;
    alert: boolean;
    alertReason?: string;
}
export interface SLAMonitorResult {
    config: SLAConfig;
    monitoring: SLAMonitoringConfig;
    currentCheck: SLACheckResult;
    trends: SLATrendResult[];
    overallStatus: 'healthy' | 'warning' | 'critical';
}
/**
 * Calculate linear regression slope for a time series.
 */
export declare function linearSlope(points: {
    x: number;
    y: number;
}[]): number;
/**
 * Analyze trend for a single metric.
 */
export declare function analyzeTrend(metric: string, points: {
    x: number;
    y: number;
}[], threshold: number, alertThreshold: number, higherIsBetter: boolean): SLATrendResult;
/**
 * Run full SLA monitoring with trend analysis.
 */
export declare function monitorSLA(config: SLAConfig, monitoring: SLAMonitoringConfig, history: SLATrendPoint[], currentReports: SuiteResult[]): SLAMonitorResult;
/**
 * Format SLA monitoring result for console.
 */
export declare function formatSLAMonitor(result: SLAMonitorResult): string;
export declare function formatSLACheck(result: SLACheckResult): string;
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