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#ifndef MOZC_WIN32_TIP_TIP_UI_ELEMENT_DELEGATE_H_
#define MOZC_WIN32_TIP_TIP_UI_ELEMENT_DELEGATE_H_

#include <msctf.h>
#include <wil/com.h>
#include <windows.h>

#include <memory>

#include "win32/tip/tip_text_service.h"

namespace mozc {
namespace win32 {
namespace tsf {

class TipUiElementDelegate {
 public:
  TipUiElementDelegate() = default;
  TipUiElementDelegate(const TipUiElementDelegate &) = delete;
  TipUiElementDelegate &operator=(const TipUiElementDelegate &) = delete;
  virtual ~TipUiElementDelegate() = default;

  virtual bool IsObservable() const = 0;

  // The ITfUIElement interface methods
  virtual HRESULT GetDescription(BSTR *description) = 0;
  virtual HRESULT GetGUID(GUID *guid) = 0;
  virtual HRESULT Show(BOOL show) = 0;
  virtual HRESULT IsShown(BOOL *show) = 0;

  // The ITfCandidateListUIElement interface methods
  virtual HRESULT GetUpdatedFlags(DWORD *flags) = 0;
  virtual HRESULT GetDocumentMgr(ITfDocumentMgr **document_manager) = 0;
  virtual HRESULT GetCount(UINT *count) = 0;
  virtual HRESULT GetSelection(UINT *index) = 0;
  virtual HRESULT GetString(UINT index, BSTR *text) = 0;
  virtual HRESULT GetPageIndex(UINT *index, UINT size, UINT *page_count) = 0;
  virtual HRESULT SetPageIndex(UINT *index, UINT page_count) = 0;
  virtual HRESULT GetCurrentPage(UINT *current_page) = 0;

  // The ITfCandidateListUIElementBehavior interface methods
  virtual HRESULT SetSelection(UINT index) = 0;
  virtual HRESULT Finalize() = 0;
  virtual HRESULT Abort() = 0;

  // The ITfToolTipUIElement interface methods
  virtual HRESULT GetString(BSTR *text) = 0;
};

class TipUiElementDelegateFactory {
 public:
  enum ElementType {
    kConventionalUnobservableSuggestWindow,
    kConventionalObservableSuggestWindow,
    kConventionalCandidateWindow,
    kConventionalIndicatorWindow,
  };

  static std::unique_ptr<TipUiElementDelegate> Create(
      wil::com_ptr_nothrow<TipTextService> text_service,
      wil::com_ptr_nothrow<ITfContext> context, ElementType type);

  TipUiElementDelegateFactory() = delete;
  TipUiElementDelegateFactory(const TipUiElementDelegateFactory &) = delete;
  TipUiElementDelegateFactory &operator=(const TipUiElementDelegateFactory &) =
      delete;
};

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

#endif  // MOZC_WIN32_TIP_TIP_UI_ELEMENT_DELEGATE_H_
