import { TimelineDataPresenter } from '../timeline-data-presenter/index.js';
/**
 * Presenter that generates an HTML chart visualization using Chart.js
 */
export declare class ChartPresenter extends TimelineDataPresenter {
    /**
     * Generate the HTML with Chart.js visualization
     */
    protected generate(): string;
    /**
     * Escape HTML special characters to prevent XSS
     */
    private escapeHtml;
    /**
     * Extract metric value from a datapoint by metric name
     *
     * @param datapoint The chart datapoint to extract from
     * @param metricName The name of the metric to extract
     * @returns The metric value or undefined if not found
     */
    private extractMetricValue;
    /**
     * Get available metrics for a specific test name
     *
     * @param testName The test name to filter metrics for
     * @returns Array of metric names available for the test
     */
    private getAvailableMetricsForTest;
    /**
     * Compute summary statistics for a specific test
     *
     * @param testName The test name to compute summary for
     * @returns Map of metric names to their summary statistics
     */
    private computeMetricsSummary;
    /**
     * Format metric value with appropriate units
     *
     * @param name The metric name
     * @param value The metric value
     * @returns Formatted string with units
     */
    private formatMetricValue;
    /**
     * Generate HTML for metrics comparison section
     *
     * @param testName The test name to generate comparison for
     * @returns HTML string for the metrics comparison grid
     */
    private generateMetricsComparisonSection;
    /**
     * Extract all unique metric names from chart data
     */
    private getUniqueMetrics;
    /**
     * Get all unique test names from chart data
     */
    private getUniqueTestNames;
}