import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
interface ChartConfig {
    chartType: 'bar' | 'pie';
    data: number[];
    categories: string[];
    title: string;
    pieOptions?: {
        innerSize?: string;
        colors?: string[];
    };
    barOptions?: {
        xAxisLabel?: string;
        yAxisLabel?: string;
    };
}
export declare class ChartService {
    private http;
    private apiUrl;
    constructor(http: HttpClient);
    saveChart(config: ChartConfig): Observable<any>;
    getChart(id: string): Observable<ChartConfig>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ChartService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ChartService>;
}
export {};