import { LitElement } from 'lit';
export interface ChartDataPoint {
    label: string;
    value: number;
    color?: string;
}
export interface ChartSeries {
    name: string;
    data: number[];
    color?: string;
}
/**
 * Chart component for data visualization
 *
 * @element ui-chart
 *
 * @prop {'line' | 'bar' | 'pie' | 'area' | 'donut'} type - Chart type
 * @prop {ChartDataPoint[] | ChartSeries[]} data - Chart data
 * @prop {string[]} labels - X-axis labels (for line/bar/area charts)
 * @prop {string} title - Chart title
 * @prop {boolean} showLegend - Show legend
 * @prop {boolean} showGrid - Show grid lines
 * @prop {boolean} showValues - Show data values
 * @prop {boolean} animated - Enable animations
 * @prop {'sm' | 'md' | 'lg'} size - Chart size
 * @prop {number} width - Custom width
 * @prop {number} height - Custom height
 * @prop {string} ariaLabel - Accessible label for the chart
 * @prop {string} ariaDescribedby - ID of element describing the chart
 *
 * @fires data-point-click - Fired when a data point is clicked
 *
 * @csspart container - The chart container
 * @csspart title - Chart title
 * @csspart legend - Chart legend
 */
export declare class Chart extends LitElement {
    type: 'line' | 'bar' | 'pie' | 'area' | 'donut';
    data: ChartDataPoint[] | ChartSeries[];
    labels: string[];
    title: string;
    showLegend: boolean;
    showGrid: boolean;
    showValues: boolean;
    animated: boolean;
    size: 'sm' | 'md' | 'lg';
    width: number;
    height: number;
    ariaLabel: string;
    ariaDescribedby: string;
    private hoveredIndex;
    private focusedIndex;
    private chartId;
    private descriptionId;
    private readonly defaultColors;
    static styles: import("lit").CSSResult;
    connectedCallback(): void;
    disconnectedCallback(): void;
    private handleKeyDown;
    private announceFocusedDataPoint;
    private getChartAriaLabel;
    private getDataSummary;
    private getChartDimensions;
    private getColor;
    private isSimpleData;
    private handleDataPointClick;
    private renderLineChart;
    private renderBarChart;
    private renderPieChart;
    private renderChart;
    private renderLegend;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'ui-chart': Chart;
    }
}
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