// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.



// ----------------------------------------------------------------------------
#include "stdpch.h"

#include "interface_anim.h"
#include "interface_manager.h"
#include "nel/gui/interface_expr.h"
#include "nel/misc/xml_auto_ptr.h"
#include "nel/gui/action_handler.h"
#include "../time_client.h"

// ----------------------------------------------------------------------------
using namespace std;
using namespace NL3D;
using namespace NLMISC;

// ----------------------------------------------------------------------------
// CInterfaceTrack
// ----------------------------------------------------------------------------
CInterfaceTrack::CInterfaceTrack()
{
	_Type = Track_Linear;
	_TrackKeyFramer = NULL;
	_Dynamic = false;
}

// ----------------------------------------------------------------------------
CInterfaceTrack::~CInterfaceTrack()
{
	delete _TrackKeyFramer;
}

// ----------------------------------------------------------------------------
bool CInterfaceTrack::parse (xmlNodePtr cur, CInterfaceGroup *parentGroup)
{
	CXMLAutoPtr ptr;

	ptr = xmlGetProp (cur, (xmlChar*)"dynamic");
	if (ptr) _Dynamic = CInterfaceElement::convertBool (ptr);

	ptr = xmlGetProp (cur, (xmlChar*)"type");
	string sTmp = ptr;
	sTmp = strlwr(sTmp);
	if (sTmp == "linear")
		_Type = Track_Linear;
	else if (sTmp == "bezier")
		_Type = Track_Bezier;
	else if (sTmp == "tcb")
		_Type = Track_TCB;
	else
		nlwarning ("track unknown type : %s, setting linear by default", (const char*)ptr);

	ptr = xmlGetProp (cur, (xmlChar*)"target");
	if (!ptr)
	{
		nlwarning ("no target for track");
		return false;
	}

	//
	if (!CInterfaceLink::splitLinkTargets (ptr, parentGroup, _Targets))
	{
		nlwarning ("no target for track");
		return false;
	}

	// Initialize the track
	switch(_Type)
	{
		case Track_Linear:	_TrackKeyFramer = UTrackKeyframer::createLinearFloatTrack(); break;
		case Track_TCB:		_TrackKeyFramer = UTrackKeyframer::createTCBFloatTrack(); break;
		case Track_Bezier:	_TrackKeyFramer = UTrackKeyframer::createBezierFloatTrack(); break;
		default: nlstop;	break;
	}

	cur = cur->children;
	bool ok = true;

	if (_Dynamic)
	{
		while (cur)
		{
			// Check that this is a key node
			if ( stricmp((char*)cur->name,"key") != 0 )
			{
				cur = cur->next;
				continue;
			}

			// Read time and value the 2 main key attributes
			CXMLAutoPtr time, value;
			time = xmlGetProp (cur, (xmlChar*)"time");
			value = xmlGetProp (cur, (xmlChar*)"value");
			if (!time || !value)
			{
				nlwarning("track key with no time or no value");
				ok = false;
				cur = cur->next;
				continue;
			}

			SDynKey k;
			k.Value = (const char*)value;
			k.Time = (const char*)time;
			if (isdigit(k.Time[0]) || (k.Time[0] == '-'))
			{
				double dTime;
				fromString(k.Time, dTime);
				k.Time = toString(dTime * CInterfaceManager::getInstance()->getSystemOption(CInterfaceManager::OptionMulCoefAnim).getValFloat());
			}

			// Depending on the type of the track read extra values
			switch(_Type)
			{
				case Track_Linear:
				break;

				case Track_Bezier:
				{
					CXMLAutoPtr inTan, outTan, step;
					inTan = xmlGetProp (cur, (xmlChar*)"intan");
					outTan = xmlGetProp (cur, (xmlChar*)"outtan");
					step = xmlGetProp (cur, (xmlChar*)"step");

					if (inTan)	k.InTan = (const char*)inTan;
					if (outTan) k.OutTan = (const char*)outTan;
					if (step)	k.Step = (const char*)step;
				}
				break;

				case Track_TCB:
				{
					CXMLAutoPtr tension, continuity, bias, easeto, easefrom;
					tension = xmlGetProp (cur, (xmlChar*)"tension");
					continuity = xmlGetProp (cur, (xmlChar*)"continuity");
					bias = xmlGetProp (cur, (xmlChar*)"bias");
					easeto = xmlGetProp (cur, (xmlChar*)"easeto");
					easefrom = xmlGetProp (cur, (xmlChar*)"easefrom");

					if (tension)	k.Tension = (const char*)tension;
					if (continuity)	k.Continuity = (const char*)continuity;
					if (bias)		k.Bias = (const char*)bias;
					if (easeto)		k.EaseTo = (const char*)easeto;
					if (easefrom)	k.EaseFrom = (const char*)easefrom;
				}
				break;
				default: nlstop; break;
			}
			_DynKeys.push_back(k);

			cur = cur->next;
		}
	}
	else // Static parsing
	{
		while (cur)
		{
			// Check that this is a key node
			if ( stricmp((char*)cur->name,"key") != 0 )
			{
				cur = cur->next;
				continue;
			}

			// Read time and value the 2 main key attributes
			CXMLAutoPtr time, value;
			time = xmlGetProp (cur, (xmlChar*)"time");
			value = xmlGetProp (cur, (xmlChar*)"value");
			if (!time || !value)
			{
				nlwarning("track key with no time or no value");
				ok = false;
				cur = cur->next;
				continue;
			}

			float fAnimTime;
			fromString((const char*)time, fAnimTime);
			TAnimationTime animTime = fAnimTime * CInterfaceManager::getInstance()->getSystemOption(CInterfaceManager::OptionMulCoefAnim).getValFloat();
			double animValue;
			fromString(value, animValue);

			// Depending on the type of the track add the key
			switch(_Type)
			{
				case Track_Linear:
				{
					UTrackKeyframer::UKeyLinearFloat k;
					k.Time = animTime;
					k.Value = (float)animValue;
					_TrackKeyFramer->addLinearFloatKey (k);
				}
				break;

				case Track_Bezier:
				{
					UTrackKeyframer::UKeyBezierFloat k;
					k.Time = animTime;
					k.Value = (float)animValue;

					// Read extra values
					CXMLAutoPtr inTan, outTan, step;
					inTan = xmlGetProp (cur, (xmlChar*)"intan");
					outTan = xmlGetProp (cur, (xmlChar*)"outtan");
					step = xmlGetProp (cur, (xmlChar*)"step");

					k.TanIn = 0.0f;
					k.TanOut = 0.0f;
					k.Step = false;

					if (inTan)	fromString((const char*)inTan, k.TanIn);
					if (outTan) fromString((const char*)outTan, k.TanOut);
					if (step)	k.Step = CInterfaceElement::convertBool(step);

					_TrackKeyFramer->addBezierFloatKey (k);
				}
				break;

				case Track_TCB:
				{
					UTrackKeyframer::UKeyTCBFloat k;
					k.Time = animTime;
					k.Value = (float)animValue;

					// Read extra values
					CXMLAutoPtr tension, continuity, bias, easeto, easefrom;
					tension = xmlGetProp (cur, (xmlChar*)"tension");
					continuity = xmlGetProp (cur, (xmlChar*)"continuity");
					bias = xmlGetProp (cur, (xmlChar*)"bias");
					easeto = xmlGetProp (cur, (xmlChar*)"easeto");
					easefrom = xmlGetProp (cur, (xmlChar*)"easefrom");

					k.Tension = 0.0f;
					k.Continuity = 0.0f;
					k.Bias = 0.0f;
					k.EaseTo = 0.0f;
					k.EaseFrom = 0.0f;

					if (tension)	fromString((const char*)tension, k.Tension);
					if (continuity)	fromString((const char*)continuity, k.Continuity);
					if (bias)		fromString((const char*)bias, k.Bias);
					if (easeto)		fromString((const char*)easeto, k.EaseTo);
					if (easefrom)	fromString((const char*)easefrom, k.EaseFrom);

					_TrackKeyFramer->addTCBFloatKey (k);
				}
				break;
				default: nlstop; break;
			}
			cur = cur->next;
		}
	}
	return true;
}

// ----------------------------------------------------------------------------
void CInterfaceTrack::update (double currentTime)
{
	float currentValue;
	UTrack *pTrack = dynamic_cast<UTrack*>(_TrackKeyFramer);
	if (pTrack == NULL) return;
	pTrack->interpolate((TAnimationTime)currentTime, currentValue);

	// Update the targets
	CInterfaceExprValue expr;
	expr.setDouble(currentValue);
	for (uint i = 0; i < _Targets.size(); ++i)
		_Targets[i].affect(expr);
}

// ----------------------------------------------------------------------------
void CInterfaceTrack::eval()
{
	if (!_Dynamic) return;

	if (_TrackKeyFramer != NULL)
		delete _TrackKeyFramer;

	switch(_Type)
	{
		case Track_Linear:
		{
			_TrackKeyFramer = UTrackKeyframer::createLinearFloatTrack();
			for (uint i = 0; i < _DynKeys.size(); ++i)
			{
				SDynKey &rKey = _DynKeys[i];
				UTrackKeyframer::UKeyLinearFloat k;
				CInterfaceExprValue res;
				if (!rKey.Time.empty() && CInterfaceExpr::eval(rKey.Time, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Time to double");
					else
						k.Time = (TAnimationTime)res.getDouble();
				}
				else
				{
					k.Time = 0;
				}

				if (!rKey.Value.empty() && CInterfaceExpr::eval(rKey.Value, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Value to double");
					else
						k.Value = (float)res.getDouble();
				}
				else
				{
					k.Value = 0;
				}

				_TrackKeyFramer->addLinearFloatKey (k);
			}
		}
		break;

		case Track_TCB:
		{
			_TrackKeyFramer = UTrackKeyframer::createTCBFloatTrack();
			for (uint i = 0; i < _DynKeys.size(); ++i)
			{
				SDynKey &rKey = _DynKeys[i];
				UTrackKeyframer::UKeyTCBFloat k;
				CInterfaceExprValue res;
				if (!rKey.Time.empty() && CInterfaceExpr::eval(rKey.Time, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Time to double");
					else
						k.Time = (TAnimationTime)res.getDouble();
				}
				else
				{
					k.Time = 0;
				}

				if (!rKey.Value.empty() && CInterfaceExpr::eval(rKey.Value, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Value to double");
					else
						k.Value = (float)res.getDouble();
				}
				else
				{
					k.Value = 0;
				}

				if (!rKey.Tension.empty() && CInterfaceExpr::eval(rKey.Tension, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Tension to double");
					else
						k.Tension = (float)res.getDouble();
				}
				else
				{
					k.Tension = 0;
				}

				if (!rKey.Continuity.empty() && CInterfaceExpr::eval(rKey.Continuity, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Continuity to double");
					else
						k.Continuity = (float)res.getDouble();
				}
				else
				{
					k.Continuity = 0;
				}

				if (!rKey.Bias.empty() && CInterfaceExpr::eval(rKey.Bias, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Bias to double");
					else
						k.Bias = (float)res.getDouble();
				}
				else
				{
					k.Bias = 0;
				}

				if (!rKey.EaseTo.empty() && CInterfaceExpr::eval(rKey.EaseTo, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert EaseTo to double");
					else
						k.EaseTo = (float)res.getDouble();
				}
				else
				{
					k.EaseTo = 0;
				}

				if (!rKey.EaseFrom.empty() && CInterfaceExpr::eval(rKey.EaseFrom, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert EaseFrom to double");
					else
						k.EaseFrom = (float)res.getDouble();
				}
				else
				{
					k.EaseFrom = 0;
				}

				_TrackKeyFramer->addTCBFloatKey (k);
			}
		}
		break;

		case Track_Bezier:
		{
			_TrackKeyFramer = UTrackKeyframer::createBezierFloatTrack(); break;
			for (uint i = 0; i < _DynKeys.size(); ++i)
			{
				SDynKey &rKey = _DynKeys[i];
				UTrackKeyframer::UKeyBezierFloat k;
				CInterfaceExprValue res;
				if (!rKey.Time.empty() && CInterfaceExpr::eval(rKey.Time, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Time to double");
					else
						k.Time = (TAnimationTime)res.getDouble();
				}
				else
				{
					k.Time = 0;
				}

				if (!rKey.Value.empty() && CInterfaceExpr::eval(rKey.Value, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert Value to double");
					else
						k.Value = (float)res.getDouble();
				}
				else
				{
					k.Value = 0;
				}

				if (!rKey.InTan.empty() && CInterfaceExpr::eval(rKey.InTan, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert TanIn to double");
					else
						k.TanIn = (float)res.getDouble();
				}
				else
				{
					k.TanIn = 0;
				}

				if (!rKey.OutTan.empty() && CInterfaceExpr::eval(rKey.OutTan, res))
				{
					if (!res.toDouble())
						nlwarning ("cannot convert TanOut to double");
					else
						k.TanOut = (float)res.getDouble();
				}
				else
				{
					k.TanOut = 0;
				}

				if (!rKey.Step.empty() && CInterfaceExpr::eval(rKey.Step, res))
				{
					if (!res.toBool())
						nlwarning ("cannot convert Step to bool");
					else
						k.Step = res.getBool();
				}
				else
				{
					k.Step = false;
				}

				_TrackKeyFramer->addBezierFloatKey (k);
			}
		}
		default: nlstop;	break;
	}

}

// ----------------------------------------------------------------------------
// CInterfaceAnim
// ----------------------------------------------------------------------------

// ----------------------------------------------------------------------------
CInterfaceAnim::CInterfaceAnim()
{
	_CurrentTime = 0;
	_Finished = true;
	_Duration = 0;
	_DisableButtons = true;
	_AnimHasToBeStopped = false;
	_Parent = NULL;
}

// ----------------------------------------------------------------------------
CInterfaceAnim::~CInterfaceAnim()
{
	for (uint i = 0; i < _Tracks.size(); ++i)
		delete _Tracks[i];
}

// ----------------------------------------------------------------------------
bool CInterfaceAnim::parse (xmlNodePtr cur, CInterfaceGroup *parentGroup)
{
	CXMLAutoPtr ptr;

	ptr = xmlGetProp (cur, (xmlChar*)"id");
	_Id = (const char*)ptr;

	ptr = xmlGetProp (cur, (xmlChar*)"duration");
	if (!ptr)
	{
		nlwarning("anim with no duration");
		return false;
	}
	fromString((const char*)ptr, _Duration);
	if (_Duration == 0)
		_Duration = 1.0;
	_Duration *= CInterfaceManager::getInstance()->getSystemOption(CInterfaceManager::OptionMulCoefAnim).getValFloat();

	ptr = xmlGetProp (cur, (xmlChar*)"disable_buttons");
	if (ptr)
		_DisableButtons = CInterfaceElement::convertBool(ptr);

	ptr = (char*) xmlGetProp( cur, (xmlChar*)"on_finish" );
	if (ptr) _AHOnFinish = (const char *) ptr;
	ptr = (char*) xmlGetProp( cur, (xmlChar*)"on_finish_params" );
	if (ptr) _AHOnFinishParams = (const char *) ptr;

	cur = cur->children;

//	bool ok = true;
	while (cur)
	{
		// Check that this is a key node
		if ( stricmp((char*)cur->name,"track") != 0 )
		{
			cur = cur->next;
			continue;
		}

		CInterfaceTrack *pTrack = new CInterfaceTrack;
		if (!pTrack->parse(cur,parentGroup))
		{
			delete pTrack;
			nlwarning("track not added to anim");
		}
		else
		{
			_Tracks.push_back(pTrack);
		}
		cur = cur->next;
	}

	_Parent = parentGroup;

	return true;
}

// ----------------------------------------------------------------------------
void CInterfaceAnim::update()
{
	if ((_Duration == 0) || (_Finished))
		return;

	// Delta time limiter
	if (DT > 0.1)
		_CurrentTime += 0.1;
	else
		_CurrentTime += DT;

	// Stop the anim if we have to
	if (_AnimHasToBeStopped)
	{
		stop();
		return;
	}

	// Do this here to let it play the last frame of the animation
	if (_CurrentTime >= _Duration)
	{
		_CurrentTime = _Duration;
		_AnimHasToBeStopped = true;
	}

	// Update tracks
	for (uint i = 0; i < _Tracks.size(); ++i)
	{
		CInterfaceTrack *pTrack = _Tracks[i];
		pTrack->update (_CurrentTime);
	}
}

// ----------------------------------------------------------------------------
void CInterfaceAnim::start()
{
	_CurrentTime = 0.0f;
	_Finished = false;
	_AnimHasToBeStopped = false;

	// Look if there are some dynamic tracks
	for (uint i = 0; i < _Tracks.size(); ++i)
	if (_Tracks[i]->isDynamic())
		_Tracks[i]->eval();

	// Play the first frame
	update();
}

// ----------------------------------------------------------------------------
void CInterfaceAnim::stop()
{
	_Finished = true;

	CInterfaceManager *pIM = CInterfaceManager::getInstance();
	if (!_AHOnFinish.empty())
		CAHManager::getInstance()->runActionHandler(_AHOnFinish, _Parent, _AHOnFinishParams);
}

// **************************
// Action handlers associated
// **************************

// ***************************************************************************
class CAHAnimStart : public IActionHandler
{
public:
	virtual void execute (CCtrlBase * /* pCaller */, const std::string &Params)
	{
		CInterfaceManager *pIM = CInterfaceManager::getInstance();
		string sAnim = getParam(Params, "anim");
		pIM->startAnim(sAnim);
	}
};
REGISTER_ACTION_HANDLER (CAHAnimStart, "anim_start");

// ***************************************************************************
class CAHAnimStop : public IActionHandler
{
public:
	virtual void execute (CCtrlBase * /* pCaller */, const std::string &Params)
	{
		CInterfaceManager *pIM = CInterfaceManager::getInstance();
		string sAnim = getParam(Params, "anim");
		pIM->stopAnim(sAnim);
	}
};
REGISTER_ACTION_HANDLER (CAHAnimStop, "anim_stop");