/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import { Event } from '@sussudio/base/common/event.mjs';
import { Disposable } from '@sussudio/base/common/lifecycle.mjs';
import { IStorage } from '@sussudio/base/parts/storage/common/storage.mjs';
import { IUserDataProfile } from '../../userDataProfile/common/userDataProfile.mjs';
import { IAnyWorkspaceIdentifier } from '../../workspace/common/workspace.mjs';
export declare const IS_NEW_KEY = '__$__isNewStorageMarker';
export declare const TARGET_KEY = '__$__targetStorageMarker';
export declare const IStorageService: import('../../instantiation/common/instantiation.mjs').ServiceIdentifier<IStorageService>;
export declare enum WillSaveStateReason {
	/**
	 * No specific reason to save state.
	 */
	NONE = 0,
	/**
	 * A hint that the workbench is about to shutdown.
	 */
	SHUTDOWN = 1,
}
export interface IWillSaveStateEvent {
	readonly reason: WillSaveStateReason;
}
export interface IStorageService {
	readonly _serviceBrand: undefined;
	/**
	 * Emitted whenever data is updated or deleted.
	 */
	readonly onDidChangeValue: Event<IStorageValueChangeEvent>;
	/**
	 * Emitted whenever target of a storage entry changes.
	 */
	readonly onDidChangeTarget: Event<IStorageTargetChangeEvent>;
	/**
	 * Emitted when the storage is about to persist. This is the right time
	 * to persist data to ensure it is stored before the application shuts
	 * down.
	 *
	 * The will save state event allows to optionally ask for the reason of
	 * saving the state, e.g. to find out if the state is saved due to a
	 * shutdown.
	 *
	 * Note: this event may be fired many times, not only on shutdown to prevent
	 * loss of state in situations where the shutdown is not sufficient to
	 * persist the data properly.
	 */
	readonly onWillSaveState: Event<IWillSaveStateEvent>;
	/**
	 * Retrieve an element stored with the given key from storage. Use
	 * the provided `defaultValue` if the element is `null` or `undefined`.
	 *
	 * @param scope allows to define the scope of the storage operation
	 * to either the current workspace only, all workspaces or all profiles.
	 */
	get(key: string, scope: StorageScope, fallbackValue: string): string;
	get(key: string, scope: StorageScope, fallbackValue?: string): string | undefined;
	/**
	 * Retrieve an element stored with the given key from storage. Use
	 * the provided `defaultValue` if the element is `null` or `undefined`.
	 * The element will be converted to a `boolean`.
	 *
	 * @param scope allows to define the scope of the storage operation
	 * to either the current workspace only, all workspaces or all profiles.
	 */
	getBoolean(key: string, scope: StorageScope, fallbackValue: boolean): boolean;
	getBoolean(key: string, scope: StorageScope, fallbackValue?: boolean): boolean | undefined;
	/**
	 * Retrieve an element stored with the given key from storage. Use
	 * the provided `defaultValue` if the element is `null` or `undefined`.
	 * The element will be converted to a `number` using `parseInt` with a
	 * base of `10`.
	 *
	 * @param scope allows to define the scope of the storage operation
	 * to either the current workspace only, all workspaces or all profiles.
	 */
	getNumber(key: string, scope: StorageScope, fallbackValue: number): number;
	getNumber(key: string, scope: StorageScope, fallbackValue?: number): number | undefined;
	/**
	 * Store a value under the given key to storage. The value will be
	 * converted to a `string`. Storing either `undefined` or `null` will
	 * remove the entry under the key.
	 *
	 * @param scope allows to define the scope of the storage operation
	 * to either the current workspace only, all workspaces or all profiles.
	 *
	 * @param target allows to define the target of the storage operation
	 * to either the current machine or user.
	 */
	store(
		key: string,
		value: string | boolean | number | undefined | null,
		scope: StorageScope,
		target: StorageTarget,
	): void;
	/**
	 * Delete an element stored under the provided key from storage.
	 *
	 * The scope argument allows to define the scope of the storage
	 * operation to either the current workspace only, all workspaces
	 * or all profiles.
	 */
	remove(key: string, scope: StorageScope): void;
	/**
	 * Returns all the keys used in the storage for the provided `scope`
	 * and `target`.
	 *
	 * Note: this will NOT return all keys stored in the storage layer.
	 * Some keys may not have an associated `StorageTarget` and thus
	 * will be excluded from the results.
	 *
	 * @param scope allows to define the scope for the keys
	 * to either the current workspace only, all workspaces or all profiles.
	 *
	 * @param target allows to define the target for the keys
	 * to either the current machine or user.
	 */
	keys(scope: StorageScope, target: StorageTarget): string[];
	/**
	 * Log the contents of the storage to the console.
	 */
	log(): void;
	/**
	 * Returns true if the storage service handles the provided scope.
	 */
	hasScope(scope: IAnyWorkspaceIdentifier | IUserDataProfile): boolean;
	/**
	 * Switch storage to another workspace or profile. Optionally preserve the
	 * current data to the new storage.
	 */
	switch(to: IAnyWorkspaceIdentifier | IUserDataProfile, preserveData: boolean): Promise<void>;
	/**
	 * Whether the storage for the given scope was created during this session or
	 * existed before.
	 */
	isNew(scope: StorageScope): boolean;
	/**
	 * Allows to flush state, e.g. in cases where a shutdown is
	 * imminent. This will send out the `onWillSaveState` to ask
	 * everyone for latest state.
	 *
	 * @returns a `Promise` that can be awaited on when all updates
	 * to the underlying storage have been flushed.
	 */
	flush(reason?: WillSaveStateReason): Promise<void>;
}
export declare const enum StorageScope {
	/**
	 * The stored data will be scoped to all workspaces across all profiles.
	 */
	APPLICATION = -1,
	/**
	 * The stored data will be scoped to all workspaces of the same profile.
	 */
	PROFILE = 0,
	/**
	 * The stored data will be scoped to the current workspace.
	 */
	WORKSPACE = 1,
}
export declare const enum StorageTarget {
	/**
	 * The stored data is user specific and applies across machines.
	 */
	USER = 0,
	/**
	 * The stored data is machine specific.
	 */
	MACHINE = 1,
}
export interface IStorageValueChangeEvent {
	/**
	 * The scope for the storage entry that changed
	 * or was removed.
	 */
	readonly scope: StorageScope;
	/**
	 * The `key` of the storage entry that was changed
	 * or was removed.
	 */
	readonly key: string;
	/**
	 * The `target` can be `undefined` if a key is being
	 * removed.
	 */
	readonly target: StorageTarget | undefined;
}
export interface IStorageTargetChangeEvent {
	/**
	 * The scope for the target that changed. Listeners
	 * should use `keys(scope, target)` to get an updated
	 * list of keys for the given `scope` and `target`.
	 */
	readonly scope: StorageScope;
}
interface IKeyTargets {
	[key: string]: StorageTarget;
}
export interface IStorageServiceOptions {
	readonly flushInterval: number;
}
export declare function loadKeyTargets(storage: IStorage): IKeyTargets;
export declare abstract class AbstractStorageService extends Disposable implements IStorageService {
	private readonly options;
	readonly _serviceBrand: undefined;
	private static DEFAULT_FLUSH_INTERVAL;
	private readonly _onDidChangeValue;
	readonly onDidChangeValue: Event<IStorageValueChangeEvent>;
	private readonly _onDidChangeTarget;
	readonly onDidChangeTarget: Event<IStorageTargetChangeEvent>;
	private readonly _onWillSaveState;
	readonly onWillSaveState: Event<IWillSaveStateEvent>;
	private initializationPromise;
	private readonly flushWhenIdleScheduler;
	private readonly runFlushWhenIdle;
	constructor(options?: IStorageServiceOptions);
	private doFlushWhenIdle;
	protected shouldFlushWhenIdle(): boolean;
	protected stopFlushWhenIdle(): void;
	initialize(): Promise<void>;
	protected emitDidChangeValue(scope: StorageScope, key: string): void;
	protected emitWillSaveState(reason: WillSaveStateReason): void;
	get(key: string, scope: StorageScope, fallbackValue: string): string;
	get(key: string, scope: StorageScope): string | undefined;
	getBoolean(key: string, scope: StorageScope, fallbackValue: boolean): boolean;
	getBoolean(key: string, scope: StorageScope): boolean | undefined;
	getNumber(key: string, scope: StorageScope, fallbackValue: number): number;
	getNumber(key: string, scope: StorageScope): number | undefined;
	store(
		key: string,
		value: string | boolean | number | undefined | null,
		scope: StorageScope,
		target: StorageTarget,
	): void;
	remove(key: string, scope: StorageScope): void;
	private withPausedEmitters;
	keys(scope: StorageScope, target: StorageTarget): string[];
	private updateKeyTarget;
	private _workspaceKeyTargets;
	private get workspaceKeyTargets();
	private _profileKeyTargets;
	private get profileKeyTargets();
	private _applicationKeyTargets;
	private get applicationKeyTargets();
	private getKeyTargets;
	private loadKeyTargets;
	isNew(scope: StorageScope): boolean;
	flush(reason?: WillSaveStateReason): Promise<void>;
	log(): Promise<void>;
	switch(to: IAnyWorkspaceIdentifier | IUserDataProfile, preserveData: boolean): Promise<void>;
	protected canSwitchProfile(from: IUserDataProfile, to: IUserDataProfile): boolean;
	protected switchData(
		oldStorage: Map<string, string>,
		newStorage: IStorage,
		scope: StorageScope,
		preserveData: boolean,
	): void;
	abstract hasScope(scope: IAnyWorkspaceIdentifier | IUserDataProfile): boolean;
	protected abstract doInitialize(): Promise<void>;
	protected abstract getStorage(scope: StorageScope): IStorage | undefined;
	protected abstract getLogDetails(scope: StorageScope): string | undefined;
	protected abstract switchToProfile(toProfile: IUserDataProfile, preserveData: boolean): Promise<void>;
	protected abstract switchToWorkspace(
		toWorkspace: IAnyWorkspaceIdentifier | IUserDataProfile,
		preserveData: boolean,
	): Promise<void>;
}
export declare function isProfileUsingDefaultStorage(profile: IUserDataProfile): boolean;
export declare class InMemoryStorageService extends AbstractStorageService {
	private readonly applicationStorage;
	private readonly profileStorage;
	private readonly workspaceStorage;
	constructor();
	protected getStorage(scope: StorageScope): IStorage;
	protected getLogDetails(scope: StorageScope): string | undefined;
	protected doInitialize(): Promise<void>;
	protected switchToProfile(): Promise<void>;
	protected switchToWorkspace(): Promise<void>;
	hasScope(scope: IAnyWorkspaceIdentifier | IUserDataProfile): boolean;
}
export declare function logStorage(
	application: Map<string, string>,
	profile: Map<string, string>,
	workspace: Map<string, string>,
	applicationPath: string,
	profilePath: string,
	workspacePath: string,
): Promise<void>;
export {};