import { mergeOptions } from './helpers';
import { ServerData } from './data';
/**
 * Determines the parameters that the hooks can take.
 */
export interface HookParams<D> {
    /**
     * Determines the data of the hook.
     */
    data: D;
    /**
     * Passes a merge option.
     */
    merge: typeof mergeOptions;
    /**
     * Determines the server data in case
     * extra information is needed.
     */
    server: ServerData;
}
/**
 * Determines a hook type.
 */
export declare type Hook<D> = (params: HookParams<D>) => D;
/**
 * Determines the interface of a hook
 * constructor.
 */
export interface isHook<D> {
    new (): Hooks<D>;
}
/**
 * Represents the hooks of the chart.
 */
export declare class Hooks<D> {
    /**
     * Stores the hooks.
     */
    hooks: Hook<D>[];
    /**
     * Appends a custom hook
     */
    custom(hook: Hook<D>): this;
    /**
     * Merges the given options to the chart.
     */
    options(options: D): this;
    /**
     * Merges the given hooks with the current ones.
     */
    merge(other: Hooks<D>): this;
}