#ifndef MATCHED_PATTERN_FRAGMENT_HDR
#define MATCHED_PATTERN_FRAGMENT_HDR

#include "concordia/common/config.hpp"
#include "concordia/interval.hpp"
#include "concordia/substring_occurrence.hpp"
#include <vector>
#include <iostream>
#include <boost/foreach.hpp>

/*!
  Class representing matched pattern fragment in concordia search.
  This fragment can be seen as a word interval of the pattern.

  This class holds information about:
  - where the pattern fragment was matched (example id and example offset)
  - where the fragment is located within the pattern
    (patternOffset, matchedLength)
*/

class MatchedPatternFragment : public Interval {
public:
    /*! Constructor.
      \param patternOffset offset of the matched fragment in the pattern
      \param matchedLength length of the matched pattern
    */
    MatchedPatternFragment(const SUFFIX_MARKER_TYPE & patternOffset,
                           const SUFFIX_MARKER_TYPE & matchedLength);
    /*! Destructor.
    */
    virtual ~MatchedPatternFragment();

    /*! Getter for occurrences.
      \returns occurrences
    */
    std::vector<SubstringOccurrence> getOccurrences() const {
        return _occurrences;
    }

    /*! Adds an occurrence to the list.
      \param fragment occurrence to be added
    */
    void addOccurrence(const SubstringOccurrence & occurrence);

    /*! Getter for pattern offset.
      \returns pattern offset
    */
    SUFFIX_MARKER_TYPE getPatternOffset() const {
        return _patternOffset;
    }

    /*! Getter for matched length.
      \returns matched fragment length
    */
    SUFFIX_MARKER_TYPE getMatchedLength() const {
        return _matchedLength;
    }

    /*! Operator for comparing fragments by their length.
      \returns true if current pattern is longer than the other
    */
    bool operator > (const MatchedPatternFragment & other) const {
        return (_matchedLength > other.getMatchedLength());
    }

    friend std::ostream & operator << (std::ostream & o,
                          const MatchedPatternFragment & fragment) {
        o << "fragment(patternOffset=" << fragment.getPatternOffset()
          << ", matchedLength=" << fragment.getMatchedLength() << ") {"
          << std::endl;
        BOOST_FOREACH(SubstringOccurrence occurrence, fragment.getOccurrences()) {
            o << "\t" << occurrence << std::endl;
        }

        o << "}";
        return o;
    }


private:
    std::vector<SubstringOccurrence> _occurrences;

    SUFFIX_MARKER_TYPE _patternOffset;

    SUFFIX_MARKER_TYPE _matchedLength;
};

#endif