/* SPDX-FileCopyrightText: 2026 Project Tick
 * SPDX-FileContributor: Project Tick
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 *   MeshMC - A Custom Launcher for Minecraft
 *   Copyright (C) 2026 Project Tick
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 *  This file incorporates work covered by the following copyright and
 *  permission notice:
 *
 * Copyright 2013-2021 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 <QObject>
#include <QString>
#include <QStringList>

#include "QObjectPtr.h"

class Task : public QObject
{
	Q_OBJECT
  public:
	using Ptr = shared_qobject_ptr<Task>;

	enum class State { Inactive, Running, Succeeded, Failed, AbortedByUser };

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

	bool isRunning() const;
	bool isFinished() const;
	bool wasSuccessful() const;

	/*!
	 * Returns the string that was passed to emitFailed as the error message
	 * when the task failed. If the task hasn't failed, returns an empty string.
	 */
	QString failReason() const;

	virtual QStringList warnings() const;

	virtual bool canAbort() const
	{
		return false;
	}

	QString getStatus()
	{
		return m_status;
	}

	qint64 getProgress()
	{
		return m_progress;
	}

	qint64 getTotalProgress()
	{
		return m_progressTotal;
	}

  protected:
	void logWarning(const QString& line);

  private:
	QString describe();

  signals:
	void started();
	void progress(qint64 current, qint64 total);
	void finished();
	void succeeded();
	void failed(QString reason);
	void status(QString status);

  public slots:
	virtual void start();
	virtual bool abort()
	{
		return false;
	};

  protected:
	virtual void executeTask() = 0;

  protected slots:
	virtual void emitSucceeded();
	virtual void emitAborted();
	virtual void emitFailed(QString reason);

  public slots:
	void setStatus(const QString& status);
	void setProgress(qint64 current, qint64 total);

  private:
	State m_state = State::Inactive;
	QStringList m_Warnings;
	QString m_failReason = "";
	QString m_status;
	int m_progress = 0;
	int m_progressTotal = 100;
};