/**
 * Index Performance Dashboard
 *
 * Real-time visualization and monitoring of index performance metrics.
 */
import type { IndexMetrics, PerformanceReport, TuningRecommendation } from './index-analytics.js';
export interface DashboardMetrics {
    timestamp: number;
    indexes: IndexDashboard[];
    queryPerformance: QueryPerformanceSummary;
    recommendations: TuningRecommendation[];
}
export interface IndexDashboard {
    name: string;
    type: string;
    reads: number;
    writes: number;
    hitRate: number;
    avgQueryMs: number;
    avgWriteMs: number;
    entries: number;
    lastUsedRelative: string;
    health: 'healthy' | 'warning' | 'critical';
    healthReason?: string;
}
export interface QueryPerformanceSummary {
    totalQueries: number;
    indexedQueries: number;
    fullScans: number;
    indexUsageRate: number;
    avgQueryMs: number;
    p50QueryMs: number;
    p95QueryMs: number;
    p99QueryMs: number;
    slowQueries: number;
}
/**
 * Dashboard formatter - converts raw metrics to display format.
 */
export declare class DashboardFormatter {
    /**
     * Format index metrics for display.
     */
    static formatIndexMetrics(metrics: IndexMetrics): IndexDashboard;
    /**
     * Format performance report for display.
     */
    static formatReport(report: PerformanceReport): DashboardMetrics;
    /**
     * Format duration for display.
     */
    private static formatDuration;
    /**
     * Generate ASCII dashboard.
     */
    static renderASCII(dashboard: DashboardMetrics): string;
    /**
     * Generate JSON dashboard data.
     */
    static renderJSON(dashboard: DashboardMetrics): string;
}
/**
 * Real-time dashboard updates via events.
 */
export declare class LiveDashboard {
    private metrics;
    private listeners;
    private updateInterval;
    private intervalHandle?;
    /**
     * Start streaming dashboard updates.
     */
    start(updateFn: () => DashboardMetrics, interval?: number): void;
    /**
     * Stop streaming updates.
     */
    stop(): void;
    /**
     * Subscribe to dashboard updates.
     */
    subscribe(listener: (metrics: DashboardMetrics) => void): () => void;
    /**
     * Get current dashboard state.
     */
    getCurrent(): DashboardMetrics | null;
    private notifyListeners;
}
/**
 * Alert system for performance anomalies.
 */
export interface PerformanceAlert {
    severity: 'info' | 'warning' | 'critical';
    type: 'slow_query' | 'high_full_scans' | 'unused_index' | 'index_overhead';
    message: string;
    timestamp: number;
    metrics?: Record<string, number | string>;
}
export declare class PerformanceAlerter {
    private alerts;
    private thresholds;
    /**
     * Check dashboard against thresholds and generate alerts.
     */
    checkThresholds(dashboard: DashboardMetrics): PerformanceAlert[];
    /**
     * Get recent alerts.
     */
    getRecentAlerts(limit?: number): PerformanceAlert[];
    /**
     * Clear old alerts.
     */
    clearOldAlerts(olderThanMs?: number): void;
}
//# sourceMappingURL=index-dashboard.d.ts.map