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// ###########################################################################

// File:            Main.cpp

// Scribe:          Stefan Falk

// Description:     Main

// ###########################################################################

// I N C L U D E S ###########################################################

#include "Defs.hpp"

// L I N K E R ###############################################################


// P R O T O T Y P E S #######################################################

_w64 long __stdcall WndProc     (HWND hwnd, unsigned int message, unsigned int wParam, _w64 long lParam);
void                shutdown    (void);

// G L O B A L ###############################################################

bool run = true;

// F U N C T I O N S #########################################################

    // M a i n _ F u n c t i o n

int __stdcall WinMain(HINSTANCE instance, HINSTANCE prevInstance, char* cmdLine, int show)
{
        // Window class

    WNDCLASSEX wc;
        // Class name

    LPCWSTR ClassName = L"Win32 Window";
    
        // Init window class

    ZeroMemory (&wc, sizeof(WNDCLASSEX));

    wc.cbSize           = sizeof(WNDCLASSEX);           // Size of window class in bytes

    wc.style            = CS_HREDRAW | CS_VREDRAW;      // Style of the window

    wc.lpfnWndProc      = WndProc;                      // Adress for the window procedure

    wc.hInstance        = instance;                     // Instance of the program

    wc.hCursor          = LoadCursor (NULL, IDC_ARROW); // Standardcursor

    wc.lpszClassName    = ClassName;                    // Classname


        // Register window class

    if (!RegisterClassEx (&wc)) 
        return _ERROR;

    HWND hwnd;

        // Create window

    hwnd = CreateWindowEx (NULL,                        // No extended-style

                                ClassName,              // Window class

                                L"Win32 Window",        // Name of the window

                                WS_OVERLAPPEDWINDOW,    // Window-style

                                100, 100,               // Position of the window (X, Y)

                                800, 600,               // Size of the Window (W, H)

                                NULL,                   // Handle to parent

                                NULL,                   // Handle to menu

                                instance,               // Handle to instance of program

                                NULL);                  // Pointer to window


        // If CreateWindowEx didn't succeed: Quit

    if (!hwnd) 
        return _ERROR;

        // Show and update window

    ShowWindow   (hwnd, SW_SHOW);
    UpdateWindow (hwnd);
    
        // Object for messages

    MSG msg;
   
        // Main-loop (Runs until run == false)

    while (run)
    {
            // Peek message

        if (PeekMessage (&msg, NULL, NULL, NULL, PM_REMOVE))
        {
                // Message for quit?

            if (msg.message == WM_QUIT)
                run = false;

                // Translate and dispatch message

            TranslateMessage (&msg);
            DispatchMessage  (&msg);
        }
    }

        // Set memory free

    shutdown ();

        // Set window class free

    UnregisterClass (wc.lpszClassName, wc.hInstance);

        // The end

    return (static_cast<int>(msg.wParam));
} // main()


    // Windoe procedure for messages

_w64 long __stdcall WndProc (HWND hwnd, unsigned int msg, unsigned int wParam, _w64 long lParam)
{
        // Provess message

    switch (msg)
    {
        // Key pressed

    case WM_KEYDOWN:
        {
                // If 'ESCAPE' has been pressed: Quit

            if (wParam == VK_ESCAPE)
                PostQuitMessage (0);
        } break;

        // Window shall be destroyed/closed

    case WM_DESTROY:
    case WM_CLOSE:
        {
            PostQuitMessage (0);
        } break;

        // Other messages won't be processed

    default : break;
    }

        // Go on

    return DefWindowProc (hwnd, msg, wParam, lParam);
} // WndProc()


void shutdown()
{
} // shutdown()