#include "stdafx.h"
#include "SGameCameraWork.h"

#include "SGame.h"
#include "SGameCamera.h"
#include "K3DCamera.h"

#include <kfile/KStream.h>
#include <kfile/KFiler.h>
#include <kfile/KFileManager.h>
#include <toolkit/XStringUtil.h>

SGameCameraWork::SGameCameraWork( SGame* pGame, SGameCamera* pGameCamera ) : m_pGame( pGame )
																		   , m_pGameCamera( pGameCamera )
																		   , m_nCurrentFrame( 0 )
																		   , m_bEnd( false )
																		   , m_dwStartTime( 0 )
																		   , m_bStop( false )
																		   , m_vCurCameraPos( 0.0f, 0.0f, 0.0 )
																		   , m_vCurTargetPos( 0.0f, 0.0f, 0.0 )
																		   , m_fCamRotation( 0.0f )
																		   , m_fTarRotation( 0.0f )
{
	m_pBackUpCamera  = new K3DCamera;
	*m_pBackUpCamera = *m_pGameCamera->GetCamera();

	m_pFrame	 = NULL;
	m_nFrameSize = 0;

	m_vCurCameraPos = m_pGameCamera->GetCameraPosition();
	m_vCurTargetPos	= m_pGameCamera->GetCameraTargetPosition();
}

SGameCameraWork::~SGameCameraWork()
{
	SAFE_DELETE( m_pBackUpCamera );

	VEC_FRAME_INFO::iterator iter = m_vFrameInfo.begin();
	for( ; iter != m_vFrameInfo.end(); )
	{
		SAFE_DELETE( (*iter) );
		iter = m_vFrameInfo.erase( iter );
	}

	SAFE_DELETE_ARRAY( m_pFrame );
}

void SGameCameraWork::LoadCameraWork( const char* szCameraWorkFileName, int nPosX, int nPosY, float fMapLen )
{
	m_pGameCamera->SetCameraWork( this );
	*m_pBackUpCamera = *m_pGameCamera->GetCamera();

	KStream* pStream = KFileManager::Instance().CreateStreamFromResource( szCameraWorkFileName );
	if( pStream == NULL )
	{
		Stop();
		SAFE_DELETE( pStream );
		return;
	}

	NFM_CAMERA_WORK_HEADER_V1 header;
	::ZeroMemory( &header, sizeof(header) );
	pStream->Read( &header, sizeof(header) );

	if( header.camerawork <= 0 || header.dwVersion != c_dwNFMCameraWorkVer )
	{
		Stop();
		SAFE_DELETE( pStream );
		return;
	}

	int nFrameSize = 0;
	for( int nSize = 0; nSize < header.camerawork; ++nSize ) //현재 카메라는 1개만 지원
	{
		pStream->Read( &nFrameSize, sizeof( nFrameSize ) );

		int nStringSize = 0;
		pStream->Read( &nStringSize, sizeof( nStringSize ) );
		if( nStringSize > 1 )
		{
			char* szCameraName = new char[nStringSize];
			pStream->Read( szCameraName, nStringSize );
			SAFE_DELETE_ARRAY(szCameraName);
		}

		for( int nSize = 0; nSize < nFrameSize; ++nSize )
		{
			NFM_CAMERA_WORK_STRUCT_V1* pFrameInfo = new NFM_CAMERA_WORK_STRUCT_V1;
			pStream->Read( pFrameInfo, sizeof( *pFrameInfo ) );

/*			pFrameInfo->px	+= (int)( (float)nPosX * fMapLen );
			pFrameInfo->py	+= (int)( (float)nPosY * fMapLen );

			pFrameInfo->tx  += (int)( (float)nPosX * fMapLen );
			pFrameInfo->ty  += (int)( (float)nPosY * fMapLen );*/

			m_vFrameInfo.push_back( pFrameInfo );
		}
	}

	m_nFrameSize = m_vFrameInfo.size();
	if( m_nFrameSize <= 0 )
	{
		Stop();
		SAFE_DELETE( pStream );
		return;
	}

	SAFE_DELETE_ARRAY( m_pFrame );
	m_pFrame = new Frame[m_nFrameSize];

	DWORD dwTime = 0;
	VEC_FRAME_INFO::iterator iter = m_vFrameInfo.begin();
	for( int nNum = 0; iter != m_vFrameInfo.end(); ++iter, ++nNum )
	{
		if( nNum != m_nFrameSize - 1 )
			dwTime += (*iter)->m_dwSpeed;

		m_pFrame[nNum].nFrameNum		= nNum;
		m_pFrame[nNum].dwFrameTime		= dwTime;
		m_pFrame[nNum].pCameraWorkInfo	= (*iter);
	}

	SAFE_DELETE( pStream );
}

int SGameCameraWork::GetNumberOfFrame( DWORD dwTime )
{
	for( size_t nNum = 0; nNum < m_nFrameSize; ++nNum )
	{
		if( m_pFrame[nNum].dwFrameTime > dwTime )
			return m_pFrame[nNum].nFrameNum;
	}
	return -1;	
}

Frame* SGameCameraWork::GetFrameByNumberOfFrame( int nNumOfFrame )
{
	if( nNumOfFrame >= (int)m_nFrameSize ) return NULL;

	return &m_pFrame[nNumOfFrame];
}

int SGameCameraWork::GetLastFrame()
{
	return m_nFrameSize - 1;
}

void SGameCameraWork::Process( DWORD dwTime )
{
	if( m_vFrameInfo.empty() ) 
	{
		Stop();
		return;
	}

	if( m_dwStartTime == 0 ) m_dwStartTime = dwTime;

	DWORD dwCurTime = dwTime - m_dwStartTime;
	
	int nFrame = GetNumberOfFrame( dwCurTime );
	if( nFrame == -1 )
	{
		Stop();
	}

	if( !IsStop() ) 
	{
		Frame* pCurrentFrame	= GetFrameByNumberOfFrame( nFrame );
		Frame* pNextFrame		= GetFrameByNumberOfFrame( nFrame + 1 );

		if( pCurrentFrame == NULL ) return;

		FRAME_INFO* pCurrentFrameInfo = pCurrentFrame->pCameraWorkInfo;

		float fTime = 1.0f - (float)(pCurrentFrame->dwFrameTime - dwCurTime) / pCurrentFrameInfo->m_dwSpeed;

		m_vCurCameraPos = K3DVector( pCurrentFrameInfo->px, pCurrentFrameInfo->py, pCurrentFrameInfo->pz );
		m_vCurTargetPos = K3DVector( pCurrentFrameInfo->tx, pCurrentFrameInfo->ty, pCurrentFrameInfo->tz );

		m_fCamRotation = pCurrentFrameInfo->m_fCameraRotation;
		m_fTarRotation = pCurrentFrameInfo->m_fTargetRotation;

		if( pNextFrame )
		{
			K3DVector vCurPos(	pCurrentFrameInfo->px, pCurrentFrameInfo->py, pCurrentFrameInfo->pz );
			K3DVector vNextPos( pCurrentFrameInfo->tx, pCurrentFrameInfo->ty, pCurrentFrameInfo->tz );

			FRAME_INFO* pNextFrameInfo = pNextFrame->pCameraWorkInfo;

			vCurPos = K3DVector( pCurrentFrameInfo->otx, pCurrentFrameInfo->oty, pCurrentFrameInfo->tz );
			if( pCurrentFrameInfo->m_fTargetRotation != 0.0f )
			{
				vNextPos = K3DVector( pCurrentFrameInfo->opx, pCurrentFrameInfo->opy, pCurrentFrameInfo->pz );
				CalcRotation( vCurPos, vCurPos, vNextPos, pCurrentFrameInfo->m_fTargetRotation );
			}

			vNextPos = K3DVector( pNextFrameInfo->otx, pNextFrameInfo->oty, pNextFrameInfo->tz );
			K3DVectorLerp( m_vCurTargetPos, vCurPos, vNextPos, fTime );

			vCurPos  = K3DVector( pCurrentFrameInfo->opx, pCurrentFrameInfo->opy, pCurrentFrameInfo->pz );
			if( pCurrentFrameInfo->m_fCameraRotation != 0.0f )
			{
				vNextPos = K3DVector( pCurrentFrameInfo->otx, pCurrentFrameInfo->oty, pCurrentFrameInfo->tz );
				CalcRotation( vCurPos, vCurPos, vNextPos, pCurrentFrameInfo->m_fCameraRotation );
			}

			vNextPos = K3DVector( pNextFrameInfo->opx, pNextFrameInfo->opy, pNextFrameInfo->pz );
			K3DVectorLerp( m_vCurCameraPos, vCurPos, vNextPos, fTime );


			m_fCamRotation = K3DFloatLerp( 0.0f, pNextFrameInfo->m_fCameraRotation, fTime );
			m_fTarRotation = K3DFloatLerp( 0.0f, pNextFrameInfo->m_fTargetRotation, fTime );
		}
	}

	K3DCamera* pCamera = m_pGameCamera->GetCamera();
	*pCamera = *m_pBackUpCamera;

	K3DVector vTempTar = m_vCurTargetPos, vTempCam = m_vCurCameraPos;

	CalcRotation( vTempCam,	m_vCurCameraPos, m_vCurTargetPos, m_fCamRotation );
	CalcRotation( vTempTar,	m_vCurTargetPos, m_vCurCameraPos, m_fTarRotation );

	pCamera->SetTargetPos( vTempTar.x, vTempTar.y, vTempTar.z );
	pCamera->SetCamPos( vTempCam.x, vTempCam.y, vTempCam.z );
}

void SGameCameraWork::CalcRotation( K3DVector& vOut, K3DVector& vPos, K3DVector& vTarget, float fRotation )
{
	//타겟은 카메라 중심으로 회전, 카메라는 타겟 중심으로 회전
	K3DMatrix matTrans, matRotation;
	K3DVector vCenter = vPos - vTarget;
	K3DMatrixTranslation( matTrans, vTarget.x, vTarget.y, vTarget.z );
	K3DMatrixRotationZ( matRotation, (fRotation * (K3D_PI * 2.0f)) / 360.0f );
	matRotation = matRotation * matTrans;
	K3DVectorTransform( vOut, vCenter, matRotation );
}

void SGameCameraWork::Stop()
{
	 m_bStop = true;
}