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/* Copyright 2013-2017 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 <QtNetwork>
#include "NetAction.h"
#include "Download.h"
#include "HttpMetaCache.h"
#include "tasks/Task.h"
#include "QObjectPtr.h"

#include "multimc_logic_export.h"

class NetJob;
typedef shared_qobject_ptr<NetJob> NetJobPtr;

class MULTIMC_LOGIC_EXPORT NetJob : public Task
{
	Q_OBJECT
public:
	explicit NetJob(QString job_name) : Task(), m_job_name(job_name) {}
	virtual ~NetJob() {}

	void addNetAction(NetActionPtr action);

	NetActionPtr operator[](int index)
	{
		return m_parts[index].download;
	}
	const NetActionPtr at(const int index)
	{
		return m_parts[index].download;
	}
	NetActionPtr first()
	{
		if (m_parts.size())
			return m_parts[0].download;
		return NetActionPtr();
	}
	int size() const
	{
		return m_parts.size();
	}
	virtual bool isRunning() const override
	{
		return m_running;
	}
	QStringList getFailedFiles();

	bool canAbort() const override;

private slots:
	void startMoreParts();

public slots:
	virtual void executeTask() override;
	virtual bool abort() override;

private slots:
	void partProgress(qint64 bytesReceived, qint64 bytesTotal);
	void partSucceeded();
	void partFailed();
	void partAborted();

private:
	void setPartProgress(int index, qint64 bytesReceived, qint64 bytesTotal);
	void connectAction(NetAction * action);

private:
	struct part_info
	{
		NetActionPtr download;
		qint64 current_progress = 0;
		qint64 total_progress = 1;
		int failures = 0;
		bool connected = false;
	};
	QString m_job_name;
	QList<part_info> m_parts;
	QMap<NetAction *, int> m_partsIndex;
	QQueue<int> m_todo;
	QSet<int> m_doing;
	QSet<int> m_done;
	QSet<int> m_failed;
	qint64 current_progress = 0;
	qint64 total_progress = 0;
	bool m_running = false;
	bool m_aborted = false;
};