/***************************************************************************
*   Copyright (C) 2001-2008 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 was originally based on FileInfo.cpp by Antonio Tejada Lacaci.
// Almost everything has changed since then.
#include "stdafx.h"
#include <limits>
#include "TFileInfoArray.h"
#include "../libicpf/exception.h"
#include "TBinarySerializer.h"
#include "SerializationHelpers.h"
#include "TFileInfo.h"

BEGIN_CHCORE_NAMESPACE

///////////////////////////////////////////////////////////////////////
// Array
TFileInfoArray::TFileInfoArray(const TPathContainer& rBasePaths) :
	m_rBasePaths(rBasePaths),
	m_bComplete(false)
{
}

TFileInfoArray::~TFileInfoArray()
{
}

void TFileInfoArray::AddFileInfo(const TFileInfoPtr& spFileInfo)
{
	boost::unique_lock<boost::shared_mutex> lock(m_lock);
	m_vFiles.push_back(spFileInfo);
}

size_t TFileInfoArray::GetSize() const
{
	boost::shared_lock<boost::shared_mutex> lock(m_lock);
	return m_vFiles.size();
}

TFileInfoPtr TFileInfoArray::GetAt(size_t stIndex) const
{
	boost::shared_lock<boost::shared_mutex> lock(m_lock);
	
	if(stIndex >= m_vFiles.size())
		THROW(_T("Out of bounds"), 0, 0, 0);
	
	return m_vFiles.at(stIndex);
}

TFileInfo TFileInfoArray::GetCopyAt(size_t stIndex) const
{
	boost::shared_lock<boost::shared_mutex> lock(m_lock);
	
	if(stIndex >= m_vFiles.size())
		THROW(_T("Out of bounds"), 0, 0, 0);
	const TFileInfoPtr& spInfo = m_vFiles.at(stIndex);
	if(!spInfo)
		THROW(_T("Invalid pointer"), 0, 0, 0);

	return *spInfo;
}

void TFileInfoArray::Clear()
{
	boost::unique_lock<boost::shared_mutex> lock(m_lock);
	m_vFiles.clear();
	m_bComplete = false;
}

unsigned long long TFileInfoArray::CalculateTotalSize()
{
	unsigned long long ullSize = 0;

	boost::shared_lock<boost::shared_mutex> lock(m_lock);
	BOOST_FOREACH(TFileInfoPtr& spFileInfo, m_vFiles)
	{
		ullSize += spFileInfo->GetLength64();
	}

	return ullSize;
}

void TFileInfoArray::SetComplete(bool bComplete)
{
	boost::unique_lock<boost::shared_mutex> lock(m_lock);
	m_bComplete = bComplete;
}

bool TFileInfoArray::IsComplete() const
{
	boost::shared_lock<boost::shared_mutex> lock(m_lock);
	return m_bComplete;
}

void TFileInfoArray::Serialize(TReadBinarySerializer& rSerializer, bool bOnlyFlags)
{
	using Serializers::Serialize;

	boost::unique_lock<boost::shared_mutex> lock(m_lock);

	size_t stCount;
	Serialize(rSerializer, stCount);

	if(!bOnlyFlags)
	{
		m_vFiles.clear();
		m_vFiles.reserve(stCount);
	}
	else if(stCount != m_vFiles.size())
		THROW(_T("Invalid count of flags received"), 0, 0, 0);

	TFileInfoPtr spFileInfo;

	uint_t uiFlags = 0;
	for(size_t stIndex = 0; stIndex < stCount; stIndex++)
	{
		if(bOnlyFlags)
		{
			TFileInfoPtr& rspFileInfo = m_vFiles.at(stIndex);
			Serialize(rSerializer, uiFlags);
			rspFileInfo->SetFlags(uiFlags);
		}
		else
		{
			spFileInfo.reset(new TFileInfo);
			spFileInfo->SetClipboard(&m_rBasePaths);
			Serialize(rSerializer, *spFileInfo);
			m_vFiles.push_back(spFileInfo);
		}
	}

	// we assume here that if the array was saved with at least one item, then it must have been complete at the time of writing
	if(!bOnlyFlags && stCount > 0)
		m_bComplete = true;
}

void TFileInfoArray::Serialize(TWriteBinarySerializer& rSerializer, bool bOnlyFlags) const
{
	using Serializers::Serialize;

	boost::shared_lock<boost::shared_mutex> lock(m_lock);

	size_t stCount = m_bComplete ? m_vFiles.size() : 0;
	Serialize(rSerializer, stCount);

	if(m_bComplete)
	{
		for(std::vector<TFileInfoPtr>::const_iterator iterFile = m_vFiles.begin(); iterFile != m_vFiles.end(); ++iterFile)
		{
			if(bOnlyFlags)
			{
				uint_t uiFlags = (*iterFile)->GetFlags();
				Serialize(rSerializer, uiFlags);
			}
			else
				Serialize(rSerializer, *(*iterFile));
		}
	}
}

unsigned long long TFileInfoArray::CalculatePartialSize(size_t stCount)
{
	unsigned long long ullSize = 0;

	boost::shared_lock<boost::shared_mutex> lock(m_lock);
	if(stCount > m_vFiles.size())
		THROW(_T("Invalid argument"), 0, 0, 0);

	for(std::vector<TFileInfoPtr>::iterator iter = m_vFiles.begin(); iter != m_vFiles.begin() + stCount; ++iter)
	{
		ullSize += (*iter)->GetLength64();
	}

	return ullSize;
}

END_CHCORE_NAMESPACE