import * as vscode from 'vscode';

import * as commands from './commands'
import * as events from './events'
import { Server } from './server';
import { TextDocumentContentProvider } from './commands/syntaxTree';

export function activate(context: vscode.ExtensionContext) {
    function disposeOnDeactivation(disposable: vscode.Disposable) {
        context.subscriptions.push(disposable);
    }

    function registerCommand(name: string, f: any) {
        disposeOnDeactivation(vscode.commands.registerCommand(name, f))
    }

    registerCommand('ra-lsp.syntaxTree', commands.syntaxTree.handle)
    registerCommand('ra-lsp.extendSelection', commands.extendSelection.handle);
    registerCommand('ra-lsp.matchingBrace', commands.matchingBrace.handle);
    registerCommand('ra-lsp.joinLines', commands.joinLines.handle);
    registerCommand('ra-lsp.parentModule', commands.parentModule.handle);
    registerCommand('ra-lsp.run', commands.runnables.handle);
    registerCommand('ra-lsp.applySourceChange', commands.applySourceChange.handle);

    let textDocumentContentProvider = new TextDocumentContentProvider()
    disposeOnDeactivation(vscode.workspace.registerTextDocumentContentProvider(
        'ra-lsp',
        textDocumentContentProvider
    ))

    Server.start()

    vscode.workspace.onDidChangeTextDocument(
        events.changeTextDocument.createHandler(textDocumentContentProvider),
        null,
        context.subscriptions)
    vscode.window.onDidChangeActiveTextEditor(events.changeActiveTextEditor.handle)
}

export function deactivate(): Thenable<void> {
    if (!Server.client) {
        return Promise.resolve();
    }
    return Server.client.stop();
}