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#ifndef MOZC_REWRITER_ENGLISH_VARIANTS_REWRITER_H_
#define MOZC_REWRITER_ENGLISH_VARIANTS_REWRITER_H_

#include <string>
#include <vector>
#include "converter/segments.h"
#include "rewriter/rewriter_interface.h"
#include "testing/base/public/gunit_prod.h"
// for FRIEND_TEST()

namespace mozc {
class ConversionRequest;

class EnglishVariantsRewriter : public RewriterInterface  {
 public:
  EnglishVariantsRewriter();
  virtual ~EnglishVariantsRewriter();

  virtual int capability() const;

  virtual bool Rewrite(const ConversionRequest &request,
                       Segments *segments) const;

 private:
  FRIEND_TEST(EnglishVariantsRewriterTest, ExpandEnglishVariants);
  bool IsT13NCandidate(Segment::Candidate *candidate) const;
  bool IsEnglishCandidate(Segment::Candidate *candidate) const;
  bool ExpandEnglishVariants(const string &input,
                             vector<string> *variants) const;
  bool ExpandEnglishVariantsWithSegment(Segment *seg) const;
};

}  // namespace mozc

#endif  // MOZC_REWRITER_ENGLISH_VARIANTS_REWRITER_H_