//
// Software License for AMDiS
//
// Copyright (c) 2010 Dresden University of Technology 
// All rights reserved.
// Authors: Simon Vey, Thomas Witkowski et al.
//
// This file is part of AMDiS
//
// See also license.opensource.txt in the distribution.


#include "FiniteElemSpace.h"
#include "BoundaryManager.h"
#include "DOFIndexed.h"
#include "DOFVector.h"
#include "Traverse.h"
#include "BasisFunction.h"
#include "ElInfo.h"

namespace AMDiS {

  std::map<BoundaryType, std::vector<BoundaryCondition*> > 
  BoundaryManager::globalBoundaryMap;


  BoundaryManager::BoundaryManager(const FiniteElemSpace *feSpace)
  {
    allocatedMemoryLocalBounds = feSpace->getBasisFcts()->getNumber();
    localBound = new BoundaryType[allocatedMemoryLocalBounds];
  }


  BoundaryManager::BoundaryManager(BoundaryManager &bm)
  {
    localBCs = bm.localBCs;
    allocatedMemoryLocalBounds = bm.allocatedMemoryLocalBounds;
    localBound = new BoundaryType[allocatedMemoryLocalBounds];
  }


  BoundaryManager::~BoundaryManager()
  {
    delete [] localBound;
  }


  void BoundaryManager::addBoundaryCondition(BoundaryCondition *localBC)
  {
    FUNCNAME("BoundaryManager::addBoundaryCondition()");
  
    BoundaryType type = localBC->getBoundaryType();
    TEST_EXIT(localBCs[type] == NULL)
      ("There is already a condition for this type %d.\n",type);
    localBCs[type] = localBC;
    
    std::vector<BoundaryCondition*>& boundMap = globalBoundaryMap[type];
    boundMap.push_back(localBC);
  }


  double BoundaryManager::boundResidual(ElInfo *elInfo, 
					DOFMatrix *matrix,
					const DOFVectorBase<double> *dv)
  {
    double result = 0.0;
    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second)
	result += (*it).second->boundResidual(elInfo, matrix, dv);
    
    return result;
  }


  void BoundaryManager::fillBoundaryConditions(ElInfo *elInfo, 
					       DOFVectorBase<double> *vec)
  {
    if (localBCs.size() > 0) {
      const FiniteElemSpace *feSpace = vec->getFeSpace();
      const BasisFunction *basisFcts = feSpace->getBasisFcts();
      int nBasFcts = basisFcts->getNumber();
      dofVec.resize(nBasFcts);

      // get boundaries of all DOFs
      basisFcts->getBound(elInfo, localBound);

      // get dof indices
      basisFcts->getLocalIndices(elInfo->getElement(),
				 feSpace->getAdmin(), 
				 dofVec);

      // apply non dirichlet boundary conditions
      for (BoundaryIndexMap::iterator it = localBCs.begin();
	     it != localBCs.end(); ++it)
	if ((*it).second && !(*it).second->isDirichlet())
	  (*it).second->fillBoundaryCondition(vec, elInfo, &dofVec[0], 
					      localBound, nBasFcts);

      // apply dirichlet boundary conditions
      for (BoundaryIndexMap::iterator it = localBCs.begin(); 
	   it != localBCs.end(); ++it)
	if ((*it).second && (*it).second->isDirichlet())
	  (*it).second->fillBoundaryCondition(vec, elInfo, &dofVec[0], 
					      localBound, nBasFcts);
    }
  }


  void BoundaryManager::fillBoundaryConditions(ElInfo *elInfo, DOFMatrix *mat)
  {
    if (localBCs.size() <= 0)
      return;
      
    const FiniteElemSpace *feSpace = mat->getRowFeSpace();
    const BasisFunction *basisFcts = feSpace->getBasisFcts();
    int nBasFcts = basisFcts->getNumber();
          dofVec.resize(nBasFcts);

    // get boundaries of all DOFs
    basisFcts->getBound(elInfo, localBound);
    
    // get DOF indices
    basisFcts->getLocalIndices(elInfo->getElement(), feSpace->getAdmin(), dofVec);
    
    // apply non dirichlet boundary conditions
    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && !(*it).second->isDirichlet())
	(*it).second->fillBoundaryCondition(mat, elInfo, &dofVec[0], 
					    localBound, nBasFcts);
    
    // apply dirichlet boundary conditions
    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && (*it).second->isDirichlet())
	(*it).second->fillBoundaryCondition(mat, elInfo, &dofVec[0], 
					    localBound, nBasFcts);
  }


  void BoundaryManager::initMatrix(DOFMatrix *matrix)
  {
    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && !(*it).second->isDirichlet())
	(*it).second->initMatrix(matrix);

    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && (*it).second->isDirichlet())
	(*it).second->initMatrix(matrix);
  }


  void BoundaryManager::exitMatrix(DOFMatrix *matrix)
  {
    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && !(*it).second->isDirichlet())
	(*it).second->exitMatrix(matrix);

    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && (*it).second->isDirichlet())
	(*it).second->exitMatrix(matrix);
  }


  void BoundaryManager::initVector(DOFVectorBase<double> *vector)
  {
    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && !(*it).second->isDirichlet())
	(*it).second->initVector(vector);

    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && (*it).second->isDirichlet())
	(*it).second->initVector(vector);
  }


  void BoundaryManager::exitVector(DOFVectorBase<double> *vector)
  {
    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && !(*it).second->isDirichlet())
	(*it).second->exitVector(vector);

    for (BoundaryIndexMap::iterator it = localBCs.begin(); it != localBCs.end(); ++it)
      if ((*it).second && (*it).second->isDirichlet())
	(*it).second->exitVector(vector);
  }

}