import type { VisualizationOptions } from '../../types';
/**
 * SankeyDataItem is the type for each data item in the sankey chart.
 */
export type SankeyDataItem = {
    source: string;
    target: string;
    value: number;
};
/**
 * SankeyConfig defines the configuration for rendering the sankey chart.
 */
export interface SankeyConfig {
    type?: 'sankey';
    data: SankeyDataItem[];
    nodeAlign?: 'left' | 'center' | 'right' | 'justify';
    theme?: 'default' | 'academy' | 'dark';
    title?: string;
    style?: {
        backgroundColor?: string;
        palette?: string[];
    };
}
/**
 * SankeyInstance represents a sankey chart instance with render and destroy methods.
 */
export interface SankeyInstance {
    render: (config: SankeyConfig) => void;
    destroy: () => void;
}
/**
 * Sankey chart component using G2 5.0.
 *
 * @example
 * ```ts
 * const sankey = Sankey({
 *   container: '#container',
 *   width: 600,
 *   height: 400,
 * });
 *
 * sankey.render({
 *   type: 'sankey',
 *   data: [
 *     { source: '煤炭', target: '发电厂', value: 120 },
 *     { source: '天然气', target: '发电厂', value: 80 },
 *     { source: '发电厂', target: '工业', value: 100 },
 *   ],
 *   nodeAlign: 'justify',
 *   theme: 'academy'
 * });
 *
 * sankey.destroy();
 * ```
 */
export declare const Sankey: (options: VisualizationOptions) => SankeyInstance;