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#ifndef MOZC_REWRITER_SINGLE_KANJI_REWRITER_H_
#define MOZC_REWRITER_SINGLE_KANJI_REWRITER_H_

#include <cstdint>
#include <string>

#include "absl/strings/string_view.h"
#include "absl/types/span.h"
#include "converter/candidate.h"
#include "converter/segments.h"
#include "dictionary/pos_matcher.h"
#include "dictionary/single_kanji_dictionary.h"
#include "request/conversion_request.h"
#include "rewriter/rewriter_interface.h"

namespace mozc {

class SingleKanjiRewriter : public RewriterInterface {
 public:
  SingleKanjiRewriter(
      const dictionary::PosMatcher& pos_matcher,
      const dictionary::SingleKanjiDictionary& single_kanji_dictionary);
  ~SingleKanjiRewriter() override;

  int capability(const ConversionRequest& request) const override;

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

 private:
  void AddDescriptionForExistingCandidates(Segment* segment) const;
  bool InsertCandidate(bool is_single_segment, uint16_t single_kanji_id,
                       absl::Span<const std::string> kanji_list,
                       Segment* segment) const;
  void FillCandidate(absl::string_view key, absl::string_view value, int cost,
                     uint16_t single_kanji_id,
                     converter::Candidate* cand) const;

  const dictionary::PosMatcher& pos_matcher_;
  const dictionary::SingleKanjiDictionary& single_kanji_dictionary_;
};

}  // namespace mozc

#endif  // MOZC_REWRITER_SINGLE_KANJI_REWRITER_H_
