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#ifndef MOZC_WIN32_IME_IME_LANGUAGE_BAR_H_
#define MOZC_WIN32_IME_IME_LANGUAGE_BAR_H_

#include <windows.h>
#include <rpcsal.h>
#include <msctf.h>
#include <ctffunc.h>
#include <atlbase.h>

#include "base/port.h"
#include "session/commands.pb.h"

class ImeSystemLangBarMenu;
class ImeCandidateList;
class ImeCharacterPad;

class LangBarCallback {
 public:
  enum MenuId {
    // Cancel something for general purpose
    kCancel            = 1,

    // For input mode selection
    kDirect            = 10,
    kHiragana          = 11,
    kFullKatakana      = 12,
    kHalfAlphanumeric  = 13,
    kFullAlphanumeric  = 14,
    kHalfKatakana      = 15,

    // Tool menu
    kProperty          = 20,
    kDictionary        = 21,
    kWordRegister      = 22,
    kHandWriting       = 23,
    kCharacterPalette  = 24,

    // Help Menu
    kHelp              = 30,
    kAbout             = 31,

    // Shortcut commands
    kReconversion      = 41,
  };

  virtual ULONG AddRef() = 0;
  virtual ULONG Release() = 0;
  virtual HRESULT OnMenuSelect(MenuId menu_id) = 0;
  virtual ~LangBarCallback() {}
};

class LanguageBar {
 public:
  LanguageBar();
  ~LanguageBar();

  // initialize and uninitialize ImeLangBarItemButton object.
  HRESULT InitLanguageBar(LangBarCallback *text_service);
  HRESULT UninitLanguageBar();

  // Updates the selected menu in the language bar.
  HRESULT UpdateLangbarMenu(mozc::commands::CompositionMode mode);

  // Sets the status of the language bar menu.
  HRESULT SetLangbarMenuEnabled(bool enable);

 private:
  // Represents the language bar item manager iff the running OS is Windows 8.
  // NOTE: We must use the same instance of this class to initialize and
  //     uninitialize LangBar items. Otherwise, you will see weird crashes
  //     around refcount on Windows 8 release preview. b/6106437
  // NOTE: Currently we cannot use the same logic for Windows 7 due to another
  //     crash issue as filed as b/6641460.
  ATL::CComPtr<ITfLangBarItemMgr> lang_bar_item_mgr_for_win8_;

  // Represents the button menu in the language bar.
  // NOTE: ImeToggleButtonMenu inherits ITfLangBarItemButton and ITfSource,
  // which inherit IUnknown. Because of this, using CComPtr<ImeIconButtonMenu>
  // causes a compile error due to the ambiguous overload resolution.
  // To avoid the compile error we use CComPtr<ITfLangBarItemButton> instead.
  ATL::CComPtr<ITfLangBarItemButton> input_button_menu_;

  // The cookie issued for installing ITfLangBarItemSink of input_button_menu_.
  DWORD input_button_cookie_;

  // Represents the tool button menu in the language bar.
  ATL::CComPtr<ITfLangBarItemButton> tool_button_menu_;

  // Represents the help menu in the system language bar.
  ATL::CComPtr<ImeSystemLangBarMenu> help_menu_;

  // The cookie issued for installing ITfSystemLangBarItemSink of help_menu_.
  DWORD help_menu_cookie_;

  DISALLOW_COPY_AND_ASSIGN(LanguageBar);
};

#endif  // MOZC_WIN32_IME_IME_LANGUAGE_BAR_H_