// ============================================================================
//  Copyright (C) 2001-2012 by Jozef Starosczyk
//  ixen@copyhandler.com
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU Library General Public License
//  (version 2) as published by the Free Software Foundation;
//
//  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 Library General Public
//  License along with this program; if not, write to the
//  Free Software Foundation, Inc.,
//  59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
// ============================================================================
/// @file  TTaskManagerStatsSnapshot.h
/// @date  2012/2/26
/// @brief Contains class responsible for holding task manager stats.
// ============================================================================
#ifndef __TTASKMANAGERSTATSSNAPSHOT_H__
#define __TTASKMANAGERSTATSSNAPSHOT_H__

#include "libchcore.h"
#include "TTaskStatsSnapshot.h"

BEGIN_CHCORE_NAMESPACE

class LIBCHCORE_API TTaskManagerStatsSnapshot
{
public:
	TTaskManagerStatsSnapshot();
	TTaskManagerStatsSnapshot(const TTaskManagerStatsSnapshot& rSrc);

	TTaskManagerStatsSnapshot& operator=(const TTaskManagerStatsSnapshot& rSrc);

	void Clear();

	void AddTaskStats(const TTaskStatsSnapshotPtr& spStats);
	size_t GetTaskStatsCount() const;
	TTaskStatsSnapshotPtr GetTaskStatsAt(size_t stIndex) const;
	TTaskStatsSnapshotPtr GetTaskStatsForTaskID(taskid_t tTaskID) const;

	size_t GetRunningTasks() const { return m_stRunningTasks; }
	void SetRunningTasks(size_t stRunningTasks) { m_stRunningTasks = stRunningTasks; }

	unsigned long long GetProcessedCount() const;
	unsigned long long GetTotalCount() const;
	unsigned long long GetProcessedSize() const;
	unsigned long long GetTotalSize() const;

	double GetCountSpeed() const;
	double GetAvgCountSpeed() const;
	double GetSizeSpeed() const;
	double GetAvgSizeSpeed() const;

	double GetCombinedProgress() const;

private:
	void CalculateProgressAndSpeeds() const;

private:
	size_t m_stRunningTasks;

#pragma warning(push)
#pragma warning(disable: 4251)
	std::vector<TTaskStatsSnapshotPtr> m_vTasksSnapshots;
#pragma warning(pop)

	// cache for items calculated on-demand
	mutable bool m_bCacheFilled;
	mutable unsigned long long m_ullProcessedCount;
	mutable unsigned long long m_ullTotalCount;
	mutable unsigned long long m_ullProcessedSize;
	mutable unsigned long long m_ullTotalSize;

	mutable double m_dCountSpeed;
	mutable double m_dSizeSpeed;

	mutable double m_dAvgCountSpeed;
	mutable double m_dAvgSizeSpeed;

	mutable double m_dCombinedProgress;
};

typedef boost::shared_ptr<TTaskManagerStatsSnapshot> TTaskManagerStatsSnapshotPtr;

END_CHCORE_NAMESPACE

#endif