#include "c_WinApp.h"

/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

#define WINDOW_CLASS_NAME "WinGUI.Main"

c_WinGUI_EventHandlerDef(WM_DESTROY, Main_Destroy) {
    PostQuitMessage(0);
}

c_WinGUI_EventHandlerDef(WM_CREATE, Main_Create) {
    return TRUE;
}

c_WinGUI_EventMapBegin(WndProc)
    c_WinGUI_EventMap(WM_DESTROY, Main_Destroy);
c_WinGUI_EventMap(WM_CREATE, Main_Create);
c_WinGUI_EventMapEnd()


static
BOOL Register(HINSTANCE hInstance) {
    WNDCLASS WndClass;
    WndClass.style = CS_HREDRAW | CS_VREDRAW;
    WndClass.lpfnWndProc = WndProc;
    WndClass.cbClsExtra = 0;
    WndClass.cbWndExtra = 0;
    WndClass.hInstance = hInstance;
    WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    WndClass.lpszMenuName = NULL;
    WndClass.lpszClassName = WINDOW_CLASS_NAME;
    return RegisterClass(&WndClass);
}

static
HWND Create(HINSTANCE hInstance, int nCmdShow) {
    HWND hwnd = CreateWindow(WINDOW_CLASS_NAME, WINDOW_CLASS_NAME,
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT,
        CW_USEDEFAULT, CW_USEDEFAULT,
        NULL, NULL, hInstance, NULL
        );

    if (hwnd == NULL) {
        return NULL;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
    return hwnd;
}

/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

c_WinGUI_Main(){
    MSG msg;

    if (!hPrevInstance) {
        if (!Register(hInstance)) {
            return FALSE;
        }
    }

    WinApp.hInstance = hInstance;


    HWND MainHwnd = Create(hInstance, nShowCmd);
    if (!MainHwnd) {
        return FALSE;
    }

    WinApp.hwnd = MainHwnd;

    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }


    return (int)msg.wParam;
}