/*
   * ASCLITE
   * Author: Jerome Ajot, Jon Fiscus, Nicolas Radde, Chris Laprun
   *
   * This software was developed at the National Institute of Standards and Technology by 
   * employees of the Federal Government in the course of their official duties. Pursuant
   * to title 17 Section 105 of the United States Code this software is not subject to
   * copyright protection and is in the public domain. ASCLITE is an experimental system.
   * NIST assumes no responsibility whatsoever for its use by other parties, and makes no
   * guarantees, expressed or implied, about its quality, reliability, or any other
   * characteristic. We would appreciate acknowledgement if the software is used.
   *
   * THIS SOFTWARE IS PROVIDED "AS IS."  With regard to this software, NIST MAKES NO EXPRESS
   * OR IMPLIED WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING MERCHANTABILITY,
   * OR FITNESS FOR A PARTICULAR PURPOSE.
   */
  
  #ifndef LEVENSHTEIN_H
  #define LEVENSHTEIN_H
  
  #include "aligner.h"
  #include "graph.h"
  #include "speakermatch.h"
  
  /**
   * Implementation of an Aligner with the Levenshtein algorithm
   */
  class Levenshtein : public Aligner
  {
  	public:
  		// class constructor
  		Levenshtein();
  		// class destructor
  		~Levenshtein();
  		/**
  		 * Align the segments with the Levenshtein algorithm.
  		 */
  		virtual void Align() { graph->FillGraph(); }
  		/**
           * Retrieve the results.
           */
          virtual GraphAlignedSegment* GetResults() { return graph->RetrieveAlignment(); }
  		/**
  		 * Initialise the Aligner to work with this set of segments
  		 */
  		virtual void SetSegments(SegmentsGroup* segmentsGroup, SpeakerMatch* pSpeakerMatch, const bool& useCompArray);
          /**
           * Return the minimal cost of the graph
           */
          int GetCost() { return graph->GetBestCost(); }
      
      private:
          /**
           * Implementation of the Graph
           */
          Graph* graph;
  		
          /**
           * Where the ref begin in the list of Segments
           */
          size_t refSepIndex;
      
          /** Logger */
          static Logger* logger;
  };
  
  #endif // LEVENSHTEIN_H