import { WeightMapType } from '../../../shared/types/roulette/chance-ratio-map.type';
export type WeightKeyCreatorType<S, M> = (arg: S) => M;
export type GenerateNumberArgsType<S, M> = {
    selection: S[];
    weightMap: WeightMapType<M>;
    weightKeyCreator: WeightKeyCreatorType<S, M>;
};
export declare class NumberGenerator {
    private _fallbackWeight;
    get fallbackWeight(): number;
    set fallbackWeight(value: number);
    /**
     * generateNumber
     * @arg args
     * @arg args.selection элементы
     * @arg args.weightMap список весов элементов
     * @arg args.weightKeyCreator callback для опредления ключа в weightMap
     */
    generateNumber<S, M>(args: GenerateNumberArgsType<S, M>): number;
    protected createWeightList<S, M>(args: GenerateNumberArgsType<S, M>): number[];
    protected getVirtualChanceListLength(chanceList: number[]): number;
    protected getRandomIndex(max: number): number;
    protected getItemIndex(chanceList: number[], randomIndex: number): number;
}