// *****************************************************************************
// Copyright (C) 2018 Red Hat, Inc. 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-only WITH Classpath-exception-2.0
// *****************************************************************************

import { injectable, inject, postConstruct } from '@theia/core/shared/inversify';
import { OutputChannel, OutputChannelManager } from '@theia/output/lib/browser/output-channel';
import { OutputContribution } from '@theia/output/lib/browser/output-contribution';
import { LogPart } from '@theia/plugin-ext/lib/common/types';
import { HostedPluginWatcher } from '@theia/plugin-ext/lib/hosted/browser/hosted-plugin-watcher';

@injectable()
export class HostedPluginLogViewer {
    public static OUTPUT_CHANNEL_NAME = 'hosted-instance-log';

    @inject(HostedPluginWatcher)
    protected readonly watcher: HostedPluginWatcher;
    @inject(OutputChannelManager)
    protected readonly outputChannelManager: OutputChannelManager;
    @inject(OutputContribution)
    protected readonly outputContribution: OutputContribution;

    protected channel: OutputChannel;

    showLogConsole(): void {
        this.outputContribution.openView({ reveal: true }).then(view => {
            view.activate();
        });
    }

    @postConstruct()
    protected init(): void {
        this.channel = this.outputChannelManager.getChannel(HostedPluginLogViewer.OUTPUT_CHANNEL_NAME);
        this.watcher.onLogMessageEvent(event => this.logMessageEventHandler(event));
    }

    protected logMessageEventHandler(event: LogPart): void {
        this.channel.appendLine(event.data);
    }

}