// ============================================================================
// ==                                                                        ==
// == AMDiS - Adaptive multidimensional simulations                          ==
// ==                                                                        ==
// ============================================================================
// ==                                                                        ==
// ==  crystal growth group                                                  ==
// ==                                                                        ==
// ==  Stiftung caesar                                                       ==
// ==  Ludwig-Erhard-Allee 2                                                 ==
// ==  53175 Bonn                                                            ==
// ==  germany                                                               ==
// ==                                                                        ==
// ============================================================================
// ==                                                                        ==
// ==  http://www.caesar.de/cg/AMDiS                                         ==
// ==                                                                        ==
// ============================================================================

/** \file MeshStructure.h */

#ifndef AMDIS_MESHSTRUCTURE_H
#define AMDIS_MESHSTRUCTURE_H

#include <vector>
#include "MemoryManager.h"

namespace AMDiS {

  class RefinementManager;
  class TraverseStack;
  class ElInfo;

  class MeshStructure
  {
  public:
    MEMORY_MANAGED(MeshStructure);

    MeshStructure()
      : currentIndex_(0),
	currentCode_(0),
	pos_(0),
	currentElement_(0),
	numElements_(0)
    {};
  
    void clear();

    void init(Mesh *mesh);

    void init(const std::vector<unsigned long int>& code,
	      int numElements) 
    {
      code_ = code;
      numElements_ = numElements;
      reset();
    };

    void reset();

    void insertElement(bool isLeaf);

    inline void commit() {
      if(pos_ > 0) {
	code_.push_back(currentCode_);
      }
      reset();
    };

    bool skipBranch(MeshStructure *insert = NULL);

    ElInfo *skipBranch(ElInfo *elInfo, TraverseStack *stack);

    bool nextElement(MeshStructure *insert = NULL);

    inline bool isLeafElement() {
      return (currentCode_ & 1) == 0;
    };

    void merge(MeshStructure *structure) {
      MeshStructure temp(*this);
      merge(&temp, structure, this);
    };

    static void merge(MeshStructure *structure1,
		      MeshStructure *structure2,
		      MeshStructure *result);

    void fitMeshToStructure(Mesh *mesh,
			    RefinementManager *manager,
			    bool checkPartition = false);

    void print() {
      FUNCNAME("MeshStructure::print()");
      reset();
      bool cont = true;
      while(cont) {
	if(isLeafElement()) {
	  MSG("0");
	} else {
	  MSG("1");
	}
	cont = nextElement();
      }
      MSG("\n");
    };

    inline const std::vector<unsigned long int>& getCode() {
      return code_;
    };

    inline int getNumElements() { 
      return numElements_; 
    };

    inline int getCurrentElement() {
      return currentElement_;
    };

  protected:
    std::vector<unsigned long int> code_;

    int currentIndex_;

    unsigned long int currentCode_;

    int pos_;

    int currentElement_;

    int numElements_;

    static const int unsignedLongSize_;
  };

}

#endif