import type { VisualizationOptions, VisualizationTheme } from '../../types';
/**
 * FunnelDataItem is the type for each data item in the funnel chart.
 */
export type FunnelDataItem = {
    category: string;
    value: number;
};
/**
 * FunnelConfig defines the configuration for rendering the funnel chart.
 */
export interface FunnelConfig {
    type?: 'funnel';
    data: FunnelDataItem[];
    theme?: VisualizationTheme;
    title?: string;
    conversionRateLabel?: string;
    style?: {
        backgroundColor?: string;
        palette?: string[];
    };
}
/**
 * FunnelInstance represents a funnel chart instance with render and destroy methods.
 */
export interface FunnelInstance {
    render: (config: FunnelConfig) => void;
    destroy: () => void;
}
/**
 * Funnel chart component using G2 5.0.
 *
 * @example
 * ```ts
 * const funnel = Funnel({
 *   container: '#container',
 *   width: 600,
 *   height: 400,
 * });
 *
 * funnel.render({
 *   type: 'funnel',
 *   data: [
 *     { category: '访问', value: 1000 },
 *     { category: '咨询', value: 600 },
 *     { category: '下单', value: 300 },
 *     { category: '成交', value: 120 },
 *   ],
 *   theme: 'academy'
 * });
 *
 * funnel.destroy();
 * ```
 */
export declare const Funnel: (options: VisualizationOptions) => FunnelInstance;