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

import * as path from 'path';
import { ExtensionContext, commands, window } from 'vscode';
import {
    LanguageClient,
    LanguageClientOptions,
    ServerOptions,
    TransportKind,
} from 'vscode-languageclient';
import { CompileBranFlakesCommand } from './command/CompileCommand';

let client: LanguageClient;

export function activate(context: ExtensionContext) {
    // The server is implemented in node
    let serverModule = context.asAbsolutePath(
        path.join('server', 'dist', 'server.js')
    );
    // The debug options for the server
    // --inspect=6009: runs the server in Node's Inspector mode so VS Code can attach to the server for debugging
    let debugOptions = { execArgv: ['--nolazy', '--inspect=6009'] };

    // If the extension is launched in debug mode then the debug server options are used
    // Otherwise the run options are used
    let serverOptions: ServerOptions = {
        run: { module: serverModule, transport: TransportKind.ipc },
        debug: {
            module: serverModule,
            transport: TransportKind.ipc,
            options: debugOptions,
        },
    };

    // Options to control the language client
    let clientOptions: LanguageClientOptions = {
        // Register the server for plain text documents
        documentSelector: [{ scheme: 'file', language: 'bf' }],
    };

    const branFlakesCommands = [new CompileBranFlakesCommand()];
    for (let branFlakesCommand of branFlakesCommands) {
        context.subscriptions.push(
            commands.registerCommand(
                branFlakesCommand.getCommandName(),
                branFlakesCommand.getCommandHandler()
            )
        );
    }

    // Create the language client and start the client.
    client = new LanguageClient(
        'brainfucklanguageserver',
        'Brainfuck Language Server',
        serverOptions,
        clientOptions
    );

    // Start the client. This will also launch the server
    client.start();
}

export function deactivate(): Thenable<void> | undefined {
    if (!client) {
        return undefined;
    }
    return client.stop();
}