/* Copyright 2013-2015 MultiMC Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <QProcess>
#include "MessageLevel.h"

/*
 * This is a basic process.
 * It has line-based logging support and hides some of the nasty bits.
 */
class LoggedProcess : public QProcess
{
Q_OBJECT
public:
	enum State
	{
		NotRunning,
		Starting,
		FailedToStart,
		Running,
		Finished,
		Crashed,
		Aborted
	};

public:
    explicit LoggedProcess(QObject* parent = 0);
    virtual ~LoggedProcess() {};

	State state() const;
	int exitCode() const;
	qint64 processId() const;

signals:
	void log(QStringList lines, MessageLevel::Enum level);
	void stateChanged(LoggedProcess::State state);

public slots:
	/**
	 * @brief kill the process - equivalent to kill -9
	 */
	void kill();


private slots:
	void on_stdErr();
	void on_stdOut();
	void on_exit(int exit_code, QProcess::ExitStatus status);
	void on_error(QProcess::ProcessError error);
	void on_stateChange(QProcess::ProcessState);

private:
	void changeState(LoggedProcess::State state);

private:
	QString m_err_leftover;
	QString m_out_leftover;
	bool m_killed = false;
	State m_state = NotRunning;
	int m_exit_code = 0;
	bool m_is_aborting = false;
};