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#ifndef MOZC_WIN32_TIP_TIP_EDIT_SESSION_IMPL_H_
#define MOZC_WIN32_TIP_TIP_EDIT_SESSION_IMPL_H_

#include <msctf.h>
#include <windows.h>

#include "protocol/commands.pb.h"
#include "win32/tip/tip_text_service.h"

namespace mozc {
namespace win32 {
namespace tsf {

// A helper function to update the context based on the response from
// mozc_server.
// TODO(yukawa): Use more descriptive class name.
class TipEditSessionImpl {
 public:
  TipEditSessionImpl() = delete;
  TipEditSessionImpl(const TipEditSessionImpl &) = delete;
  TipEditSessionImpl &operator=(const TipEditSessionImpl &) = delete;

  // A high level logic to handle on-composition-terminated event.
  static HRESULT OnCompositionTerminated(TipTextService *text_service,
                                         ITfContext *context,
                                         ITfComposition *composition,
                                         TfEditCookie write_cookie);

  // Does post-edit status checking for composition (if exists). For example,
  // when the composition is canceled by the application, this method sends
  // REVERT message to the server so that the status is kept to be consistent.
  static HRESULT OnEndEdit(TipTextService *text_service, ITfContext *context,
                           TfEditCookie write_cookie,
                           ITfEditRecord *edit_record);

  // A core logic of response handler. This function does
  // - Updates composition string.
  // - Updates candidate strings.
  // - Updates private context including IME On/Off state and input mode.
  // - Invokes UI update. (by calling UpdateUI)
  static HRESULT UpdateContext(TipTextService *text_service,
                               ITfContext *context, TfEditCookie write_cookie,
                               const commands::Output &output);

  // A core logic of UI handler. This function does
  // - Invokes UI update.
  static void UpdateUI(TipTextService *text_service, ITfContext *context,
                       TfEditCookie read_cookie);
};

}  // namespace tsf
}  // namespace win32
}  // namespace mozc

#endif  // MOZC_WIN32_TIP_TIP_EDIT_SESSION_IMPL_H_
