#include <windows.h>

// The style of the main window, note the absence of WS_THICKFRAME and WS_MAXIMIZEBOX
#define MODDED_WS_OVERLAPPEDWINDOW (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX)

// DirectX includes ////////////////////////////////////////////////////////////
#include <ddraw.h>

// DirectX globals /////////////////////////////////////////////////////////////

LPDIRECTDRAW7 lpdd = NULL; // dd4 object

// Other globals ///////////////////////////////////////////////////////////////

HWND main_window_handle = NULL; // used to store the main window handle globally

// WindowProcedure /////////////////////////////////////////////////////////////

//  This function is called by the Windows function DispatchMessage()
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch(message) // handle the messages
    {
        case WM_CREATE:
            // do initialization stuff here
            break;
        case WM_DESTROY:
            PostQuitMessage(0); // send a WM_QUIT to the message queue
            break;
        default: // for messages that we don't deal with
            return DefWindowProc (hwnd, message, wParam, lParam);
    }

    return(0);
}

// GameInitiate ////////////////////////////////////////////////////////////////

void Game_Init()
{
    // create IDirectDraw interface 7.0 object and test for error
    if (FAILED(DirectDrawCreateEx(NULL, (void **)&lpdd, IID_IDirectDraw7, NULL)))
        MessageBox(main_window_handle, "An error occurred while creating the DirectDraw7 interface.", "An error occurred", MB_OK | MB_ICONERROR | MB_SYSTEMMODAL);
}

// GameMain ////////////////////////////////////////////////////////////////////

void Game_Main()
{

}

// GameShutdown ////////////////////////////////////////////////////////////////

void Game_Shutdown()
{

}

// WinMain /////////////////////////////////////////////////////////////////////

int WINAPI WinMain( HINSTANCE hThisInstance,    // Handle of the application
                    HINSTANCE hPrevInstance,    // Obsolete, once used to hold the handle of the app that launched this app
                    LPSTR lpszArgument,         // The command line + parameters used to run the app
                    int nFunsterStil)           // Used with ShowWindow()
{
    HWND hwnd;       // This is the handle for our main window
    MSG messages;    // Here messages to the application are saved


    // Data structure for the window class
    WNDCLASSEX winclass = {                  // ---Variable names------Descriptions------
    sizeof(WNDCLASSEX),                     // cbSize              The size of the winclass, just use: sizeof(WNDCLASSEX)
    CS_CLASSDC | CS_HREDRAW | CS_VREDRAW,    // style               CS_CLASSDC is required when using gdi
    WindowProcedure,                         // lpfnWndProc         This is the function that handels windows messages (does WM_CREATE, WM_DESTROY and WM_PAINT ring a bell?)
    0,                                       // cbClsExtra          Extra class memory, nobody will ever use this
    0,                                       // cbWndExtra          Extra window memory, this is just as useless
    hThisInstance,                           // hInstance           The instance of the application, recived as a parameter to WinMain, it's used everywhere so hold on to it
    LoadIcon(NULL, IDI_APPLICATION),         // hIcon               (NULL, IDI_APPLICATION), (hThisInstance, "Xicon")
    LoadCursor(NULL, IDC_ARROW),             // hCursor             The curser show when hovering the window, for the default use: LoadCursor(NULL, IDC_ARROW), or maybe LoadCursor(hThisInstance, "CustomCuserName") if you have made your own
    GetSysColorBrush(COLOR_MENU),            // hbrBackground       The window background color, use this: GetSysColorBrush(COLOR_MENU)
    NULL,                                    // lpszMenuName        The default menu of the windows created using this window class, menus are defined in the resource file
    "WINCLASS1",                            // lpszClassName       Identifies the class, used when creating windows, has to be unique
    LoadIcon(NULL, IDI_APPLICATION)};        // hIconSm             Small icon, use: LoadIcon(NULL, IDI_APPLICATION) for default LoadIcon(hThisInstance, or "CustomIconName") if you have made your own


    // Register the window class, and if it fails quit the program
    if (!RegisterClassEx (&winclass))
        return(0);

    // create the main window, bail if problem
    if (!(hwnd = CreateWindowEx(                  // ---Variable names------Descriptions------
            NULL,                                 // dwExStyle           Extended style, use: WS_EX_TOPMOST to set the window always on top, this can also be changed run-time with the SetWindowPos function
            "WINCLASS1",                        // lpClassName         The name of the window class used to create the window, defined in the lpszClassName variable of the window class
            "Template window",                 // lpWindowName        The title appearing in the title bar of the window, or the text appearing on buttons and the like
            MODDED_WS_OVERLAPPEDWINDOW,           // dwStyle             General style, for resizable window, use: WS_OVERLAPPEDWINDOW, and for a none-resizable use: MODDED_WS_OVERLAPPEDWINDOW. For starting with the window shown use: WS_VISIBLE
            CW_USEDEFAULT,CW_USEDEFAULT,          // x, y                Initial x,y coordinats, use: CW_USEDEFAULT for each of them for default position
            375, 544,                            // nWidth, nHeight     Initial width and height of the window
            NULL,                                 // hWndParent          Handle to parent window, (in most cases probaly the main window handle, hwnd)
            NULL,                                 // hMenu               Handle to menu, menus are defined in the resource file, for no menu (or default menu set by the window class) use: NULL
            hThisInstance,                        // hInstance           Instance of the application, recieved as a parameter to WinMain
            NULL)))                               // lpParam             Extra creation parameters, it has something to do with the WM_CREATE message, not vital (don't know, don't care)
    return(0);

    // Make the window visible on the screen
    ShowWindow(hwnd, nFunsterStil);

    // store the main window handle globally
    main_window_handle = hwnd;

    // initialize game here
    Game_Init();

    // enter main event loop
    while(TRUE)
    {
        // test if there is a message in queue, if so get it
        if (PeekMessage(&messages,NULL,0,0,PM_REMOVE))
        {
            // test if this is a quit
            if (messages.message == WM_QUIT)
                break;

            // translate any accelerator keys
            TranslateMessage(&messages);

            // send the message to the window proc
            DispatchMessage(&messages);
        } // end if

        // main game processing goes here
        Game_Main();

    } // end while

    // closedown game here
    Game_Shutdown();

    // The program return-value is 0 - The value that PostQuitMessage() gave
    return(messages.wParam);
}