/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

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 <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//																			//
//	plProgressMgr Functions													//
//																			//
//// History /////////////////////////////////////////////////////////////////
//																			//
//	10.26.2001 mcn	- Created												//
//																			//
//////////////////////////////////////////////////////////////////////////////

#include <stdlib.h>
#include "hsTypes.h"
#include "plProgressMgr.h"
#include "hsTimer.h"

#include "../plPipeline/plPlates.h"

#include <string.h>


//////////////////////////////////////////////////////////////////////////////
//// plProgressMgr Functions /////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

plProgressMgr	*plProgressMgr::fManager = nil;

#define LOADING_RES			"xLoading_Linking.%02d.png"
#define LOADING_RES_COUNT	18

char* plProgressMgr::fImageRotation[LOADING_RES_COUNT];

char* plProgressMgr::fStaticTextIDs[] = {
	"xLoading_Linking_Text.png",
	"xLoading_Updating_Text.png"
};

//// Constructor & Destructor ////////////////////////////////////////////////

plProgressMgr::plProgressMgr()
{
	fOperations = nil;
	fManager = this;
	fCallbackProc = nil;
	fCurrentStaticText = kNone;

	// Fill array with pre-computed loading frame IDs
	for (int i=0; i < LOADING_RES_COUNT; i++)
	{
		char* frameID = TRACKED_NEW char[128];
		sprintf(frameID, LOADING_RES, i);
		fImageRotation[i] = frameID;
	}
}

plProgressMgr::~plProgressMgr()
{
	for (int i=0; i < LOADING_RES_COUNT; i++)
	{
		delete fImageRotation[i];
	}

	while( fOperations != nil )
		delete fOperations;
	fManager = nil;
}

//// RegisterOperation ///////////////////////////////////////////////////////

plOperationProgress* plProgressMgr::RegisterOperation(hsScalar length, const char *title, StaticText staticTextType, bool isRetry, bool alwaysDrawText)
{
	return IRegisterOperation(length, title, staticTextType, isRetry, false, alwaysDrawText);
}

plOperationProgress* plProgressMgr::RegisterOverallOperation(hsScalar length, const char *title, StaticText staticTextType, bool alwaysDrawText)
{
	return IRegisterOperation(length, title, staticTextType, false, true, alwaysDrawText);
}

plOperationProgress* plProgressMgr::IRegisterOperation(hsScalar length, const char *title, StaticText staticTextType, bool isRetry, bool isOverall, bool alwaysDrawText)
{
	if (fOperations == nil)
	{
		fCurrentStaticText = staticTextType;
		Activate();
	}

	plOperationProgress	*op = TRACKED_NEW plOperationProgress( length );

	op->SetTitle( title );

	if (fOperations)
	{
		fOperations->fBack = op;
		op->fNext = fOperations;
	}
	fOperations = op;

	if (isRetry)
		hsSetBits(op->fFlags, plOperationProgress::kRetry);
	if (isOverall)
		hsSetBits(op->fFlags, plOperationProgress::kOverall);
	if (alwaysDrawText)
		hsSetBits(op->fFlags, plOperationProgress::kAlwaysDrawText);

	IUpdateCallbackProc( op );

	return op;
}

void plProgressMgr::IUnregisterOperation(plOperationProgress* op)
{
	plOperationProgress* last = nil;
	plOperationProgress* cur = fOperations;

	while (cur)
	{
		if (cur == op)
		{
			if (cur->fNext)
				cur->fNext->fBack = last;

			if (last)
				last->fNext = cur->fNext;
			else
				fOperations = cur->fNext;

			break;
		}

		last = cur;
		cur = cur->fNext;
	}

	if (fOperations == nil)
	{
		fCurrentStaticText = kNone;
		Deactivate();
	}
}

//// IUpdateCallbackProc /////////////////////////////////////////////////////

void plProgressMgr::IUpdateFlags(plOperationProgress* progress)
{
	// Init update is done, clear it and set first update
	if (hsCheckBits(progress->fFlags, plOperationProgress::kInitUpdate))
	{
		hsClearBits(progress->fFlags, plOperationProgress::kInitUpdate);
		hsSetBits(progress->fFlags, plOperationProgress::kFirstUpdate);
	}
	// First update is done, clear it
	else if (hsCheckBits(progress->fFlags, plOperationProgress::kFirstUpdate))
		hsClearBits(progress->fFlags, plOperationProgress::kFirstUpdate);
}

void plProgressMgr::IUpdateCallbackProc(plOperationProgress* progress)
{
	// Update the parent, if necessary
	plOperationProgress* parentProgress = progress->GetNext();
	while (parentProgress && parentProgress->IsOverallProgress())
	{
		parentProgress->IChildUpdateBegin(progress);
		parentProgress = parentProgress->GetNext();
	}

	// Update everyone who wants to know about progress
	IDerivedCallbackProc(progress);
	if (fCallbackProc != nil)
		fCallbackProc(progress);

	IUpdateFlags(progress);

	parentProgress = progress->GetNext();
	while (parentProgress && parentProgress->IsOverallProgress())
	{
		parentProgress->IChildUpdateEnd(progress);
		parentProgress = parentProgress->GetNext();
	}
}

//// SetCallbackProc /////////////////////////////////////////////////////////

plProgressMgrCallbackProc plProgressMgr::SetCallbackProc( plProgressMgrCallbackProc proc )
{
	plProgressMgrCallbackProc old = fCallbackProc;
	fCallbackProc = proc;
	return old;
}

//// CancelAllOps ////////////////////////////////////////////////////////////

void	plProgressMgr::CancelAllOps( void )
{
	plOperationProgress *op;


	for( op = fOperations; op != nil; op = op->GetNext() )
		op->SetCancelFlag( true );

	fCurrentStaticText = kNone;
}

char*	plProgressMgr::GetLoadingFrameID(int index)
{
	if (index < LOADING_RES_COUNT)
		return fImageRotation[index];
	else
		return fImageRotation[0];
}

char*	plProgressMgr::GetStaticTextID(StaticText staticTextType)
{
	return fStaticTextIDs[staticTextType];
}


//////////////////////////////////////////////////////////////////////////////
//// plOperationProgress ////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

plOperationProgress::plOperationProgress( hsScalar length ) :
	fMax(length),
	fValue(0),
	fNext(nil),
	fBack(nil),
	fContext(0),
	fFlags(kInitUpdate),
	fStartTime(hsTimer::GetSeconds()),
	fElapsedSecs(0),
	fRemainingSecs(0),
	fAmtPerSec(0.f)
{
	memset( fStatusText, 0, sizeof( fStatusText ) );
	memset( fTitle, 0, sizeof( fTitle ) );
}

plOperationProgress::~plOperationProgress()
{
	hsSetBits(fFlags, kLastUpdate);
	if (!IsOverallProgress())
		plProgressMgr::GetInstance()->IUpdateCallbackProc(this);
	plProgressMgr::GetInstance()->IUnregisterOperation(this);
}

void plOperationProgress::IUpdateStats()
{
	double curTime = hsTimer::GetSeconds();
	double elapsed = 0;
	if (curTime > fStartTime)
		elapsed = curTime - fStartTime;
	else
		elapsed = fStartTime - curTime;

	hsScalar progress = GetProgress();

	if (elapsed > 0)
		fAmtPerSec = progress / hsScalar(elapsed);
	else
		fAmtPerSec = 0;
	fElapsedSecs = (UInt32)elapsed;
	if (progress < fMax)
		fRemainingSecs = (UInt32)((fMax - progress) / fAmtPerSec);
	else
		fRemainingSecs = 0;
}

void plOperationProgress::IChildUpdateBegin(plOperationProgress* child)
{
	if (child->IsFirstUpdate() && child->IsRetry())
	{
		// We're retrying this file, so update the overall stats to reflect the additional download
		fMax += child->GetMax();
	}
	fValue += child->GetProgress();

	IUpdateStats();
}

void plOperationProgress::IChildUpdateEnd(plOperationProgress* child)
{
	// If we're aborting, modify the total bytes to reflect any data we didn't download
	if (hsCheckBits(child->fFlags, plOperationProgress::kAborting))
		fMax += child->GetProgress() - child->GetMax();
	else if (!child->IsLastUpdate())
		fValue -= child->GetProgress();
}

//// Increment ///////////////////////////////////////////////////////////////

void	plOperationProgress::Increment( hsScalar byHowMuch )
{
	fValue += byHowMuch;
	if( fValue > fMax )
		fValue = fMax;
	IUpdateStats();

	plProgressMgr::GetInstance()->IUpdateCallbackProc( this );
}

//// SetHowMuch //////////////////////////////////////////////////////////////

void	plOperationProgress::SetHowMuch( hsScalar howMuch )
{
	fValue = howMuch;
	if( fValue > fMax )
		fValue = fMax;
	IUpdateStats();

	plProgressMgr::GetInstance()->IUpdateCallbackProc( this );
}

//// SetStatusText ///////////////////////////////////////////////////////////

void	plOperationProgress::SetStatusText( const char *text )
{
	if( text != nil )
		strncpy( fStatusText, text, sizeof( fStatusText ) );
	else
		fStatusText[ 0 ] = 0;
}

//// SetTitle ////////////////////////////////////////////////////////////////

void	plOperationProgress::SetTitle( const char *text )
{
	if (text != nil)
	{
		strncpy(fTitle, text, sizeof(fTitle));
	}
	else
		fTitle[0] = 0;
}

//// SetLength ///////////////////////////////////////////////////////////////

void	plOperationProgress::SetLength( hsScalar length )
{
	fMax = length;
	if( fValue > fMax )
		fValue = fMax;
	IUpdateStats();

	plProgressMgr::GetInstance()->IUpdateCallbackProc( this );
}

void plOperationProgress::SetAborting()
{
	hsSetBits(fFlags, kAborting);
	plProgressMgr::GetInstance()->IUpdateCallbackProc(this);
	fMax = fValue = 0.f;
	hsClearBits(fFlags, kAborting);
}

void plOperationProgress::SetRetry()
{
	hsSetBits(fFlags, kRetry);
	hsSetBits(fFlags, kFirstUpdate);
}