// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

import { LanguageServerType } from '../activation/types';

import { Resource } from '../common/types';

import { PythonEnvironment } from '../pythonEnvironments/info';

export const ILanguageServerWatcher = Symbol('ILanguageServerWatcher');

/**

* The language server watcher serves as a singleton that watches for changes to the language server setting,

* and instantiates the relevant language server extension manager.

*/

export interface ILanguageServerWatcher {

readonly languageServerExtensionManager: ILanguageServerExtensionManager | undefined;

readonly languageServerType: LanguageServerType;

startLanguageServer(languageServerType: LanguageServerType, resource?: Resource): Promise<void>;

restartLanguageServers(): Promise<void>;

get(resource: Resource, interpreter?: PythonEnvironment): Promise<ILanguageServerExtensionManager>;

}

/**

* `ILanguageServerExtensionManager` implementations act as wrappers for anything related to their specific language server extension.

* They are responsible for starting and stopping the language server provided by their LS extension.

* They also extend the `ILanguageServer` interface via `ILanguageServerCapabilities` to continue supporting the Jupyter integration.

*/

export interface ILanguageServerExtensionManager {

startLanguageServer(resource: Resource, interpreter?: PythonEnvironment): Promise<void>;

stopLanguageServer(): Promise<void>;

canStartLanguageServer(interpreter: PythonEnvironment | undefined): boolean;

languageServerNotAvailable(): Promise<void>;

dispose(): void;

}