/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import { IStringDictionary } from "../../../base/common/collections.mjs";
import { Emitter, Event } from "../../../base/common/event.mjs";
import { Disposable } from "../../../base/common/lifecycle.mjs";
export type PolicyName = string;
export type PolicyValue = string | number;
export type PolicyDefinition = {
    type: 'string' | 'number';
};
export declare const IPolicyService: import("../../instantiation/common/instantiation.mjs").ServiceIdentifier<IPolicyService>;
export interface IPolicyService {
    readonly _serviceBrand: undefined;
    readonly onDidChange: Event<readonly PolicyName[]>;
    updatePolicyDefinitions(policyDefinitions: IStringDictionary<PolicyDefinition>): Promise<IStringDictionary<PolicyValue>>;
    getPolicyValue(name: PolicyName): PolicyValue | undefined;
    serialize(): IStringDictionary<{
        definition: PolicyDefinition;
        value: PolicyValue;
    }> | undefined;
}
export declare abstract class AbstractPolicyService extends Disposable implements IPolicyService {
    readonly _serviceBrand: undefined;
    protected policyDefinitions: IStringDictionary<PolicyDefinition>;
    protected policies: Map<string, PolicyValue>;
    protected readonly _onDidChange: Emitter<readonly string[]>;
    readonly onDidChange: Event<readonly string[]>;
    updatePolicyDefinitions(policyDefinitions: IStringDictionary<PolicyDefinition>): Promise<IStringDictionary<PolicyValue>>;
    getPolicyValue(name: PolicyName): PolicyValue | undefined;
    serialize(): IStringDictionary<{
        definition: PolicyDefinition;
        value: PolicyValue;
    }>;
    protected abstract _updatePolicyDefinitions(policyDefinitions: IStringDictionary<PolicyDefinition>): Promise<void>;
}
export declare class NullPolicyService implements IPolicyService {
    readonly _serviceBrand: undefined;
    readonly onDidChange: Event<any>;
    updatePolicyDefinitions(): Promise<{}>;
    getPolicyValue(): undefined;
    serialize(): undefined;
}