#include <windows.h>
#include <commctrl.h>
#include "resource.h"
#include "callbacks.h"

// Our application entry point.
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
  INITCOMMONCONTROLSEX icc;
  WNDCLASSEX wc;
  LPCTSTR MainWndClass = TEXT("Win32 Test application");
  HWND hWnd;
  HACCEL hAccelerators;
  HMENU hSysMenu;
  MSG msg;

  (void)hPrevInstance;
  (void)lpCmdLine;

  // Initialise common controls.
  icc.dwSize = sizeof(icc);
  icc.dwICC = ICC_WIN95_CLASSES;
  InitCommonControlsEx(&icc);

  // Class for our main window.
  wc.cbSize        = sizeof(wc);
  wc.style         = 0;
  wc.lpfnWndProc   = &MainWndProc;
  wc.cbClsExtra    = 0;
  wc.cbWndExtra    = 0;
  wc.hInstance     = hInstance;
  wc.hIcon         = (HICON) LoadImage(hInstance, MAKEINTRESOURCE(IDI_APPICON), IMAGE_ICON, 0, 0,
                                       LR_DEFAULTSIZE | LR_DEFAULTCOLOR | LR_SHARED);
  wc.hCursor       = (HCURSOR) LoadImage(NULL, IDC_ARROW, IMAGE_CURSOR, 0, 0, LR_SHARED);
  wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
  wc.lpszMenuName  = MAKEINTRESOURCE(IDR_MAINMENU);
  wc.lpszClassName = MainWndClass;
  wc.hIconSm       = (HICON) LoadImage(hInstance, MAKEINTRESOURCE(IDI_APPICON), IMAGE_ICON,
                                       GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON),
                                       LR_DEFAULTCOLOR | LR_SHARED);

  // Register our window classes, or error.
  if (! RegisterClassEx(&wc))
  {
    MessageBox(NULL, TEXT("Error registering window class."), TEXT("Error"), MB_ICONERROR | MB_OK);
    return 0;
  }
  
  // Create instance of main window.
  hWnd = CreateWindowEx(0, MainWndClass, MainWndClass, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
                        320, 200, NULL, NULL, hInstance, NULL);

  // Error if window creation failed.
  if (! hWnd)
  {
    MessageBox(NULL, TEXT("Error creating main window."), TEXT("Error"), MB_ICONERROR | MB_OK);
    return 0;
  }

  // Load accelerators.
  hAccelerators = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDR_ACCELERATOR));

  // Add "about" to the system menu.
  hSysMenu = GetSystemMenu(hWnd, FALSE);
  InsertMenu(hSysMenu, 5, MF_BYPOSITION | MF_SEPARATOR, 0, NULL);
  InsertMenu(hSysMenu, 6, MF_BYPOSITION, ID_HELP_ABOUT, TEXT("About"));

  // Show window and force a paint.
  ShowWindow(hWnd, nCmdShow);
  UpdateWindow(hWnd);

  // Main message loop.
  while(GetMessage(&msg, NULL, 0, 0) > 0)
  {
    if (! TranslateAccelerator(msg.hwnd, hAccelerators, &msg))
    {
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
  }

  return (int) msg.wParam;
}