import { ChartConfig, ProcessedDataPoint } from '@/types';
/**
 * D3 v7 rendering engine for stacked area charts
 */
export declare class Renderer {
    private svg;
    private chartGroup;
    private xScale;
    private yScale;
    private area;
    private config;
    private bounds;
    private tooltip;
    private currentData;
    private currentEnergySources;
    private currentColors;
    private hoverIndicator;
    private hoverCircle;
    private chartContainer;
    constructor(container: string | HTMLElement, config: ChartConfig);
    /**
     * Initialize SVG container
     */
    private initializeSVG;
    /**
     * Initialize D3 scales
     */
    private initializeScales;
    /**
     * Initialize D3 area generator
     */
    private initializeAreaGenerator;
    /**
     * Initialize tooltip
     */
    private initializeTooltip;
    /**
     * Initialize hover indicator (circle that follows chart boundary)
     */
    private initializeHoverIndicator;
    /**
     * Main render method
     */
    render(data: ProcessedDataPoint[], energySources: string[], colors?: Record<string, string>): void;
    /**
     * Update existing chart with new data
     */
    update(data: ProcessedDataPoint[], energySources: string[], colors?: Record<string, string>): void;
    /**
     * Update scales based on data
     */
    private updateScales;
    /**
     * Render area paths (initial render)
     */
    private renderAreas;
    /**
     * Update area paths with transitions
     */
    private updateAreas;
    /**
     * Add mouse interactions to area paths
     */
    private addInteractions;
    /**
     * Clear chart content
     */
    private clearChart;
    /**
     * Resize chart
     */
    resize(width: number, height: number): void;
    /**
     * Update configuration
     */
    updateConfig(newConfig: Partial<ChartConfig>): void;
    /**
     * Destroy renderer and clean up
     */
    destroy(): void;
    /**
     * Show hover indicator
     */
    private showHoverIndicator;
    /**
     * Hide hover indicator
     */
    private hideHoverIndicator;
    /**
     * Update hover indicator position and color to follow specific layer's boundary
     */
    private updateHoverIndicatorForLayer;
    /**
     * Get color for energy source, preferring data colors over defaults
     */
    private getColorForSource;
    /**
     * Get SVG element for external manipulation
     */
    getSVG(): SVGSVGElement | null;
}
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