import type { StylesHandler } from '../types';
import type { SettingsPort } from '../ports';
/**
 * @class Settings
 */
export default class Settings implements SettingsPort {
    /**
     * Reference to settings.
     *
     * @protected
     * @type {object}
     */
    settings: Record<string, unknown>;
    /**
     * The defaults values of settings.
     * Void 0 means it is required, null means it can be empty.
     *
     * @public
     * @type {Readonly<object>}
     */
    defaults: Record<string, unknown>;
    /**
     * @param {object} settings The user defined settings.
     */
    constructor(settings: Record<string, unknown>);
    /**
     * Update settings.
     *
     * @param {object|string} settings The singular settings to update or if passed as object to merge with.
     * @param {*} value The value to set if the first argument is passed as string.
     * @returns {Settings}
     */
    update(settings: string | Record<string, unknown>, value?: unknown): this;
    /**
     * Get setting by name.
     *
     * @param {$Keys<SettingsPure>} key The settings key to retrieve.
     * @param {*} [param1] Additional parameter passed to the options defined as function.
     * @param {*} [param2] Additional parameter passed to the options defined as function.
     * @param {*} [param3] Additional parameter passed to the options defined as function.
     * @param {*} [param4] Additional parameter passed to the options defined as function.
     * @returns {*}
     */
    getSetting(key: 'stylesHandler'): StylesHandler;
    getSetting(key: 'preventOverflow'): 'horizontal' | 'vertical' | false;
    getSetting(key: 'rtlMode'): boolean;
    getSetting(key: 'isDataViewInstance'): boolean;
    getSetting(key: 'fixedColumnsStart'): number;
    getSetting(key: 'fixedRowsTop'): number;
    getSetting(key: 'fixedRowsBottom'): number;
    getSetting(key: 'totalRows'): number | undefined;
    getSetting(key: 'totalColumns'): number | undefined;
    getSetting(key: 'rowHeaderWidth'): number | undefined;
    getSetting(key: 'defaultColumnWidth'): number | undefined;
    getSetting(key: 'viewportRowRenderingThreshold'): number | 'auto';
    getSetting(key: 'viewportColumnRenderingThreshold'): number | 'auto';
    getSetting(key: 'viewportRowRenderingOffsetIsAuto'): boolean;
    getSetting(key: 'viewportColumnRenderingOffsetIsAuto'): boolean;
    getSetting<T = any>(key: string, param1?: any, param2?: unknown, param3?: unknown, param4?: unknown): T;
    /**
     * Get a setting value without any evaluation.
     *
     * @param {string} key The settings key to retrieve.
     * @returns {*}
     */
    getSettingPure<T = any>(key: string): T;
    /**
     * Checks if setting exists.
     *
     * @param {boolean} key The settings key to check.
     * @returns {boolean}
     */
    has(key: string): boolean;
}