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#ifndef MOZC_CONVERTER_HISTORY_RECONSTRUCTOR_H_
#define MOZC_CONVERTER_HISTORY_RECONSTRUCTOR_H_

#include <cstdint>
#include <string>

#include "absl/strings/string_view.h"
#include "converter/segments.h"
#include "dictionary/pos_matcher.h"

namespace mozc {
namespace converter {

class HistoryReconstructor {
 public:
  explicit HistoryReconstructor(const dictionary::PosMatcher& pos_matcher);

  [[nodiscard]]
  bool ReconstructHistory(absl::string_view preceding_text,
                          Segments* segments) const;

 private:
  friend class HistoryReconstructorTestPeer;

  // Returns the substring of |str|. This substring consists of similar script
  // type and you can use it as preceding text for conversion.
  bool GetLastConnectivePart(absl::string_view preceding_text, std::string* key,
                             std::string* value, uint16_t* id) const;

  const dictionary::PosMatcher& pos_matcher_;
};

}  // namespace converter
}  // namespace mozc

#endif  // MOZC_CONVERTER_HISTORY_RECONSTRUCTOR_H_
