#include "cru/win/gui/Clipboard.h"
#include <winuser.h>
#include "cru/common/Logger.h"
#include "cru/win/gui/GodWindow.h"
#include "cru/win/gui/UiApplication.h"

namespace cru::platform::gui::win {
WinClipboard::WinClipboard(WinUiApplication* application)
    : application_(application) {}

WinClipboard::~WinClipboard() {}

String WinClipboard::GetText() {
  auto god_window = application_->GetGodWindow();

  if (!::OpenClipboard(god_window->GetHandle())) {
    log::Warn(u"Failed to open clipboard.");
    return {};
  }

  if (!::IsClipboardFormatAvailable(CF_UNICODETEXT)) {
    log::Warn(u"Clipboard format for text is not available.");
    return {};
  }

  auto handle = ::GetClipboardData(CF_UNICODETEXT);

  if (handle == nullptr) {
    log::Warn(u"Failed to get clipboard data.");
    return {};
  }

  auto ptr = ::GlobalLock(handle);
  if (ptr == nullptr) {
    log::Warn(u"Failed to lock clipboard data.");
    ::CloseClipboard();
    return {};
  }

  String result(static_cast<wchar_t*>(ptr));

  ::GlobalUnlock(handle);
  ::CloseClipboard();

  return result;
}

void WinClipboard::SetText(String text) {
  auto god_window = application_->GetGodWindow();

  if (!::OpenClipboard(god_window->GetHandle())) {
    log::Warn(u"Failed to open clipboard.");
    return;
  }

  auto handle = GlobalAlloc(GMEM_MOVEABLE, (text.size() + 1) * sizeof(wchar_t));

  if (handle == nullptr) {
    log::Warn(u"Failed to allocate clipboard data.");
    ::CloseClipboard();
    return;
  }

  auto ptr = ::GlobalLock(handle);
  if (ptr == nullptr) {
    log::Warn(u"Failed to lock clipboard data.");
    ::GlobalFree(handle);
    ::CloseClipboard();
    return;
  }

  std::memcpy(ptr, text.c_str(), (text.size() + 1) * sizeof(wchar_t));

  ::GlobalUnlock(handle);

  if (::SetClipboardData(CF_UNICODETEXT, handle) == nullptr) {
    log::Warn(u"Failed to set clipboard data.");
  }

  ::CloseClipboard();
}
}  // namespace cru::platform::gui::win