import { HWND, LPARAM, UINT, winApi, WPARAM } from '../mod.ts';

// Create WindowClassEx
const windowClassEx = winApi.create.windowClassEx();
windowClassEx.style = winApi.create.classStyle({
  CS_VREDRAW: true,
  CS_HREDRAW: true,
});
windowClassEx.setClassName('AppWindow');
windowClassEx.setWindowProcedure(
  (hWnd: HWND, Msg: UINT, wParam: WPARAM, lParam: LPARAM) => {
    switch (Msg) {
      case winApi.windowMessage.WM_CREATE:
        console.log('Create');
        break;
      case winApi.windowMessage.WM_DESTROY:
        console.log('Destroy');
        winApi.user.PostQuitMessage(0);
        break;
    }
    return winApi.user.DefWindowProc(hWnd, Msg, wParam, lParam);
  },
);
// Set deno icon.
windowClassEx.hIcon = winApi.user.LoadIcon(
  winApi.kernel.GetModuleHandle(),
  winApi.macro.MAKEINTRESOURCE(1n),
);
windowClassEx.hIconSm = winApi.user.LoadIcon(
  winApi.kernel.GetModuleHandle(),
  winApi.macro.MAKEINTRESOURCE(1n),
);

// Register WindowClassEx
const result = winApi.user.RegisterClassEx(windowClassEx.pointer);
if (!result) {
  throw new Error(
    `Failure RegisterClassEx. [GetLastError=${winApi.kernel.GetLastError()}]`,
  );
}

// CreateWindowEx
const windowHandle = winApi.user.CreateWindowEx(
  0,
  windowClassEx.lpszClassName,
  winApi.create.stringPointer('🪟test🦕'),
  winApi.create.windowStyle({
    WS_VISIBLE: true,
    WS_OVERLAPPEDWINDOW: true,
  }),
  winApi.constant.CW_USEDEFAULT,
  winApi.constant.CW_USEDEFAULT,
  winApi.constant.CW_USEDEFAULT,
  winApi.constant.CW_USEDEFAULT,
);

if (!windowHandle) {
  throw new Error(
    `Failure CreateWindowEx. [GetLastError=${winApi.kernel.GetLastError()}]`,
  );
}

if (!winApi.kernel.FreeConsole()) {
  Deno.exit(0);
}

// Message loop.
const message = winApi.create.message();
while (winApi.user.GetMessage(message.pointer, windowHandle, 0, 0)) {
  winApi.user.DispatchMessage(message.pointer);
}

Deno.exit(Number(message.wParam));