/**
 * Common visualization utilities for analysis tools.
 */
/**
 * Creates a simple ASCII chart for time-based data.
 *
 * @param timeBuckets - Array of time buckets, each with a timestamp and count
 * @param options - Optional configuration for the chart
 * @returns Formatted ASCII chart as a string
 */
export declare function createAsciiTimeChart(timeBuckets: Array<{
    key_as_string?: string;
    key?: number | string;
    doc_count: number;
}>, options?: {
    timeFormat?: "full" | "date" | "time";
    maxBars?: number;
    title?: string;
}): string;
/**
 * Creates a table with trend indicators.
 *
 * @param trends - Array of trend objects
 * @param options - Optional configuration for the table
 * @returns Formatted markdown table as a string
 */
export declare function createTrendTable(trends: Array<{
    value: string | number;
    beforeCount: number;
    afterCount: number;
    percentageChange: number;
    trend?: "increasing" | "decreasing" | "stable";
}>, options?: {
    showPercentage?: boolean;
    trendVisualization?: "text" | "ascii" | "none";
    title?: string;
}): string;