/********************************************************************************
 * Copyright (C) 2018 Ericsson and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License v. 2.0 are satisfied: GNU General Public License, version 2
 * with the GNU Classpath Exception which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 ********************************************************************************/

import { injectable, inject } from 'inversify';
import { FrontendApplicationContribution, PreferenceSchemaProvider } from '@devpodio/core/lib/browser';
import { ThemeService } from '@devpodio/core/lib/browser/theming';
import { MonacoSnippetSuggestProvider } from './monaco-snippet-suggest-provider';

@injectable()
export class MonacoFrontendApplicationContribution implements FrontendApplicationContribution {

    @inject(ThemeService)
    protected readonly themeService: ThemeService;

    @inject(MonacoSnippetSuggestProvider)
    protected readonly snippetSuggestProvider: MonacoSnippetSuggestProvider;

    @inject(PreferenceSchemaProvider)
    protected readonly preferenceSchema: PreferenceSchemaProvider;

    async initialize() {
        const currentTheme = this.themeService.getCurrentTheme();
        this.changeTheme(currentTheme.editorTheme);
        this.themeService.onThemeChange(event => this.changeTheme(event.newTheme.editorTheme));

        monaco.suggest.setSnippetSuggestSupport(this.snippetSuggestProvider);

        for (const language of monaco.languages.getLanguages()) {
            this.preferenceSchema.registerOverrideIdentifier(language.id);
        }
        const registerLanguage = monaco.languages.register.bind(monaco.languages);
        monaco.languages.register = language => {
            registerLanguage(language);
            this.preferenceSchema.registerOverrideIdentifier(language.id);
        };
    }

    protected changeTheme(editorTheme: string | undefined) {
        const monacoTheme = editorTheme || this.themeService.defaultTheme.id;
        monaco.editor.setTheme(monacoTheme);
        document.body.classList.add(monacoTheme);
    }
}