/*---------------------------------------------------------------------------------------------
 *  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';
export interface IUpdate {
	version: string;
	productVersion: string;
	supportsFastUpdate?: boolean;
	url?: string;
	hash?: string;
}
/**
 * Updates are run as a state machine:
 *
 *      Uninitialized
 *           ↓
 *          Idle
 *          ↓  ↑
 *   Checking for Updates  →  Available for Download
 *         ↓
 *     Downloading  →   Ready
 *         ↓               ↑
 *     Downloaded   →  Updating
 *
 * Available: There is an update available for download (linux).
 * Ready: Code will be updated as soon as it restarts (win32, darwin).
 * Downloaded: There is an update ready to be installed in the background (win32).
 */
export declare const enum StateType {
	Uninitialized = 'uninitialized',
	Idle = 'idle',
	CheckingForUpdates = 'checking for updates',
	AvailableForDownload = 'available for download',
	Downloading = 'downloading',
	Downloaded = 'downloaded',
	Updating = 'updating',
	Ready = 'ready',
}
export declare const enum UpdateType {
	Setup = 0,
	Archive = 1,
	Snap = 2,
}
export type Uninitialized = {
	type: StateType.Uninitialized;
};
export type Idle = {
	type: StateType.Idle;
	updateType: UpdateType;
	error?: string;
};
export type CheckingForUpdates = {
	type: StateType.CheckingForUpdates;
	explicit: boolean;
};
export type AvailableForDownload = {
	type: StateType.AvailableForDownload;
	update: IUpdate;
};
export type Downloading = {
	type: StateType.Downloading;
	update: IUpdate;
};
export type Downloaded = {
	type: StateType.Downloaded;
	update: IUpdate;
};
export type Updating = {
	type: StateType.Updating;
	update: IUpdate;
};
export type Ready = {
	type: StateType.Ready;
	update: IUpdate;
};
export type State =
	| Uninitialized
	| Idle
	| CheckingForUpdates
	| AvailableForDownload
	| Downloading
	| Downloaded
	| Updating
	| Ready;
export declare const State: {
	Uninitialized: Uninitialized;
	Idle: (updateType: UpdateType, error?: string) => Idle;
	CheckingForUpdates: (explicit: boolean) => CheckingForUpdates;
	AvailableForDownload: (update: IUpdate) => AvailableForDownload;
	Downloading: (update: IUpdate) => Downloading;
	Downloaded: (update: IUpdate) => Downloaded;
	Updating: (update: IUpdate) => Updating;
	Ready: (update: IUpdate) => Ready;
};
export interface IAutoUpdater extends Event.NodeEventEmitter {
	setFeedURL(url: string): void;
	checkForUpdates(): void;
	applyUpdate?(): Promise<void>;
	quitAndInstall(): void;
}
export declare const IUpdateService: import('../../instantiation/common/instantiation.mjs').ServiceIdentifier<IUpdateService>;
export interface IUpdateService {
	readonly _serviceBrand: undefined;
	readonly onStateChange: Event<State>;
	readonly state: State;
	checkForUpdates(explicit: boolean): Promise<void>;
	downloadUpdate(): Promise<void>;
	applyUpdate(): Promise<void>;
	quitAndInstall(): Promise<void>;
	isLatestVersion(): Promise<boolean | undefined>;
	_applySpecificUpdate(packagePath: string): Promise<void>;
}