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#ifndef MOZC_WIN32_IME_IME_COMPOSITION_STRING_H_
#define MOZC_WIN32_IME_IME_COMPOSITION_STRING_H_

#include <windows.h>
#include <ime.h>

#include <vector>

#include "base/port.h"
#include "testing/base/public/gunit_prod.h"
// for FRIEND_TEST()
#include "win32/ime/ime_types.h"

namespace mozc {

namespace commands {
class KeyEvent;
class Output;
}  // namespace commands

namespace win32 {
// TODO(yukawa): back port this implementation to shared IME component.
struct CompositionString {
 public:
  bool Initialize();
  bool Update(const mozc::commands::Output &output,
              vector<UIMessage> *messages);

  // Returns |focused_character_index_|, which represents the index of wide
  // character where suggest/predict/candidate window is aligned.
  DWORD focused_character_index() const;

 private:
  bool UpdateInternal(const mozc::commands::Output &output, DWORD *update);
  bool HandleResult(const mozc::commands::Output &output);
  bool HandlePreedit(const mozc::commands::Output &output);

  static const int kMaxCompositionLength = 500;
  static const int kMaxCompositionClauseLength = kMaxCompositionLength + 1;
  static const int kMaxResultLength = kMaxCompositionLength;
  static const int kMaxResultClauseLength = kMaxResultLength + 1;

  COMPOSITIONSTRING info;

  // Represents the index of wide character where
  // suggest/predict/candidate window is aligned.
  DWORD focused_character_index_;

  // Composition.
  wchar_t composition_[kMaxCompositionLength];
  DWORD composition_clause_[kMaxCompositionClauseLength];
  BYTE composition_attribute_[kMaxCompositionLength];

  // Composition reading string.
  wchar_t composition_reading_[kMaxCompositionLength];
  DWORD composition_reading_clause_[kMaxCompositionClauseLength];
  BYTE composition_reading_attribute_[kMaxCompositionLength];

  // Result.
  wchar_t result_[kMaxResultLength];
  DWORD result_clause_[kMaxResultClauseLength];

  // Result reading string.
  wchar_t result_reading_[kMaxResultLength];
  DWORD result_reading_clause_[kMaxResultClauseLength];

  FRIEND_TEST(ImeCompositionStringTest, StartCompositionTest);
  FRIEND_TEST(ImeCompositionStringTest,
              EndCompositionWhenCompositionBecomesEmpty);
  FRIEND_TEST(ImeCompositionStringTest,
              EndCompositionWhenCompositionIsCommited);
  FRIEND_TEST(ImeCompositionStringTest,
              EndCompositionWhenCompositionIsCommitedWithPreedit);
  FRIEND_TEST(ImeCompositionStringTest, SpaceKeyWhenIMEIsTurnedOn_Issue3200585);
  FRIEND_TEST(ImeCompositionStringTest, Suggest);
  FRIEND_TEST(ImeCompositionStringTest, Predict);
  FRIEND_TEST(ImeCompositionStringTest, Convert);
  FRIEND_TEST(ImeCompositionStringTest, SurrogatePairSupport);
};
}  // namespace win32
}  // namespace mozc
#endif  // MOZC_WIN32_IME_IME_COMPOSITION_STRING_H_