import type { Setting, SettingValue } from "./ProjectConfig.js";
export type FlagOverrides = {
    dataSource: IOverrideDataSource;
    behaviour: OverrideBehaviour;
};
/**
 * Specifies the behaviours for flag overrides.
 */
export declare enum OverrideBehaviour {
    /**
     * When evaluating values, the SDK will not use feature flags and settings from the ConfigCat CDN, but it will use
     * all feature flags and settings that are loaded from local-override sources.
     */
    LocalOnly = 0,
    /**
     * When evaluating values, the SDK will use all feature flags and settings that are downloaded from the ConfigCat CDN,
     * plus all feature flags and settings that are loaded from local-override sources. If a feature flag or a setting is
     * defined both in the fetched and the local-override source then the local-override version will take precedence.
     */
    LocalOverRemote = 1,
    /**
     * When evaluating values, the SDK will use all feature flags and settings that are downloaded from the ConfigCat CDN,
     * plus all feature flags and settings that are loaded from local-override sources. If a feature flag or a setting is
     * defined both in the fetched and the local-override source then the fetched version will take precedence.
     */
    RemoteOverLocal = 2
}
export declare function nameOfOverrideBehaviour(value: OverrideBehaviour): string;
export interface IOverrideDataSource {
    getOverrides(): Record<string, Setting>;
}
export declare class MapOverrideDataSource implements IOverrideDataSource {
    private readonly initialSettings;
    private readonly map;
    constructor(map: Record<string, NonNullable<SettingValue>>, watchChanges?: boolean);
    getOverrides(): Record<string, Setting>;
}
export interface IQueryStringProvider {
    readonly currentValue: string | Record<string, string | ReadonlyArray<string>> | null | undefined;
}
export declare class QueryParamsOverrideDataSource implements IOverrideDataSource {
    private readonly watchChanges;
    private readonly paramPrefix;
    private readonly queryStringProvider;
    private queryString;
    private settings;
    constructor(watchChanges?: boolean, paramPrefix?: string, queryStringProvider?: IQueryStringProvider);
    getOverrides(): Record<string, Setting>;
}