// =========================================================================
// @author Leonardo Florez Valencia
// @email florez-l@javeriana.edu.co
// =========================================================================
#ifndef __fpa__DataStructures__MinimumSpanningTree__h__
#define __fpa__DataStructures__MinimumSpanningTree__h__

#include <vector>

namespace fpa
{
  namespace DataStructures
  {
    /**
     */
    template< class _TVertex, class _Superclass >
    class MinimumSpanningTree
      : public _Superclass
    {
    public:
      typedef MinimumSpanningTree             Self;
      typedef _Superclass                     Superclass;
      typedef itk::SmartPointer< Self >       Pointer;
      typedef itk::SmartPointer< const Self > ConstPointer;

      typedef _TVertex                      TVertex;
      typedef std::pair< TVertex, bool >    TCollision;
      typedef std::vector< TCollision >     TCollisionsRow;
      typedef std::vector< TCollisionsRow > TCollisions;
      typedef std::vector< TVertex >        TVertices;

    protected:
      typedef std::vector< unsigned long > _TRow;
      typedef std::vector< _TRow >         _TMatrix;

    public:
      itkTypeMacro( fpa::Base::MinimumSpanningTree, _Superclass );

    public:
      const TCollisions& GetCollisions( ) const;
      void SetCollisions( const TCollisions& collisions );

      void ClearSeeds( );
      void AddSeed( const TVertex& seed );

      virtual TVertex GetParent( const TVertex& v ) const = 0;
      virtual void SetParent( const TVertex& v, const TVertex& p ) = 0;

      virtual TVertices GetPath( const TVertex& a ) const;
      virtual TVertices GetPath( const TVertex& a, const TVertex& b ) const;

    protected:
      MinimumSpanningTree( );
      virtual ~MinimumSpanningTree( );

    private:
      MinimumSpanningTree( const Self& other );
      Self& operator=( const Self& other );

    protected:
      TCollisions m_Collisions;
      _TMatrix    m_FrontPaths;
      std::vector< TVertex > m_Seeds;
    };

  } // ecapseman

} // ecapseman

#ifndef ITK_MANUAL_INSTANTIATION
#  include <fpa/DataStructures/MinimumSpanningTree.hxx>
#endif // ITK_MANUAL_INSTANTIATION
#endif // __fpa__DataStructures__MinimumSpanningTree__h__

// eof - $RCSfile$