/*++

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are permitted provided that the following conditions are met:

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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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Abstract:

NMR_ModelSliceStackResource.h: implements the resource object for a slice stack

--*/

#include "Model/Classes/NMR_ModelSliceStack.h"
#include "Model/Classes/NMR_ModelResource.h"
#include "Common/NMR_Exception.h"

#include <cmath>

namespace NMR {

	CModelSliceStack::CModelSliceStack(_In_ const ModelResourceID sID, _In_ CModel * pModel, nfDouble dZBottom)
		: CModelResource(sID, pModel)
	{
		m_dZBottom = dZBottom;
	}

	CModelSliceStack::~CModelSliceStack()
	{

	}

	PSlice CModelSliceStack::AddSlice(const nfDouble dZTop)
	{
		if (!AllowsGeometry()) {
			throw CNMRException(NMR_ERROR_SLICES_MIXING_SLICES_WITH_SLICEREFS);
		}

		if (m_pSlices.size() > 0)
		{
			if (m_pSlices.back()->getTopZ() >= dZTop)
				throw CNMRException(NMR_ERROR_SLICES_Z_NOTINCREASING);
		}
		else {
			if (m_dZBottom >= dZTop)
				throw CNMRException(NMR_ERROR_SLICES_Z_NOTINCREASING);
		}
		PSlice pSlice = std::make_shared<CSlice>(dZTop);
		m_pSlices.push_back(pSlice);
		return pSlice;
	}

	void CModelSliceStack::AddSliceRef(PModelSliceStack pOtherStack, bool bPedantic)
	{
		if (!AllowsReferences()) {
			throw CNMRException(NMR_ERROR_SLICES_MIXING_SLICES_WITH_SLICEREFS);
		}
		if (this == pOtherStack.get()) {
			throw CNMRException(NMR_ERROR_SLICES_SLICEREF_CIRCULAR);
		}
		if (pOtherStack->getSliceRefCount() > 0) {
			throw CNMRException(NMR_ERROR_SLICES_REFS_LEVELTOODEEP);
		}
		if (bPedantic) {
			if (pOtherStack->getZBottom() < getHighestZ()) {
				throw CNMRException(NMR_ERROR_SLICES_REFS_Z_NOTINCREASING);
			}
		}

		// TODO: check in model, whether "this" is used as sliceref anywhere in the model
		m_pSliceRefs.push_back(pOtherStack);
	}

	nfUint32 CModelSliceStack::getSliceCount()
	{
		return nfUint32(m_pSlices.size());
	}

	PSlice CModelSliceStack::getSlice(nfUint32 nIndex)
	{
		if (nIndex >= m_pSlices.size())
			throw CNMRException(NMR_ERROR_INVALIDINDEX);
		return m_pSlices[nIndex];
	}

	bool CModelSliceStack::AllowsGeometry() const
	{
		return m_pSliceRefs.empty();
	}

	nfUint32 CModelSliceStack::getSliceRefCount()
	{
		return nfUint32(m_pSliceRefs.size());
	}

	PModelSliceStack CModelSliceStack::getSliceRef(nfUint32 nIndex)
	{
		if (nIndex >= m_pSliceRefs.size())
			throw CNMRException(NMR_ERROR_INVALIDINDEX);
		return m_pSliceRefs[nIndex];
	}

	bool CModelSliceStack::AllowsReferences() const
	{
		return m_pSlices.empty();
	}


	void CModelSliceStack::CollapseSliceReferences()
	{
		m_pSlices.clear();
		nfUint64 nSlices = 0;
		for (auto pStack : m_pSliceRefs) {
			nSlices += pStack->getSliceCount();
		}
		m_pSlices.reserve(nSlices);
		for (auto pStack : m_pSliceRefs) {
			for (auto pOldSlice : pStack->m_pSlices) {
				m_pSlices.push_back(std::make_shared<CSlice>(*pOldSlice.get()));
			}
		}
	}

	std::string CModelSliceStack::OwnPath()
	{
		std::string sPath = getPackageResourceID()->getPath();
		if (sPath.empty()) {
			throw CNMRException(NMR_ERROR_INVALID_SLICEPATH);
		}
		return sPath;
	}

	void CModelSliceStack::SetOwnPath(std::string sOwnPath)
	{
		PPackageModelPath pModelPath = getModel()->findOrCreateModelPath(sOwnPath);
		CPackageResourceID::setModelPath(getPackageResourceID(), pModelPath);
	}

	nfDouble CModelSliceStack::getZBottom()
	{
		return m_dZBottom;
	}

	void CModelSliceStack::setZBottom(nfDouble dZBottom)
	{
		if (!m_pSlices.empty()) {
			if (m_pSlices.front()->getTopZ() <= dZBottom)
				throw CNMRException(NMR_ERROR_SLICES_Z_NOTINCREASING);
		}
		if (!m_pSliceRefs.empty()) {
			if (m_pSliceRefs.front()->getZBottom() < dZBottom)
				throw CNMRException(NMR_ERROR_SLICES_Z_NOTINCREASING);
		}
		m_dZBottom = dZBottom;
	}

	nfDouble CModelSliceStack::getHighestZ() const
	{
		nfDouble dHighestZ = m_dZBottom;
		if (!m_pSlices.empty()) {
			dHighestZ = std::max(dHighestZ, m_pSlices.back()->getTopZ());
		}
		if (!m_pSliceRefs.empty()) {
			dHighestZ = std::max(dHighestZ, m_pSliceRefs.back()->getHighestZ());
		}
		return dHighestZ;
	}

	bool CModelSliceStack::areAllPolygonsClosed()
	{
		for (auto pSlice : m_pSlices) {
			if (!pSlice->allPolygonsAreClosed())
				return false;
		}

		for (auto pSliceRef : m_pSliceRefs) {
			if (!pSliceRef->areAllPolygonsClosed())
				return false;
		}

		return true;
	}

}