#include "Window.h"

// https://learn.microsoft.com/en-us/windows/win32/learnwin32/creating-a-window

INT Window::init(HINSTANCE hInstance, UINT width, UINT height)
{
    // 1. describe window class
    WNDCLASS wc = {};
    wc.hInstance = hInstance;
    wc.lpszClassName = TEXT("D3D9"); // class name
    wc.lpfnWndProc = WindowProc; // callback function for windows to communicate with our application
    wc.hbrBackground = CreateSolidBrush(RGB(0, 255, 0));
    
    // 2. register window class
    if (!RegisterClass(&wc)) return 100;
    
    // 3. adjust window size (optional)
    
    // 4. create window instance
    _hWnd = CreateWindow(
        wc.lpszClassName, // class name of window class to be instantiated
        wc.lpszClassName, // window title
        WS_OVERLAPPEDWINDOW, // visual style
        100, 100, // window position (left-top corner)
        width, height, // window size
        nullptr, // handle to parent window
        nullptr, // handle to menu instance
        hInstance,
        nullptr // pointer to optional parameter
    );
    if (_hWnd == nullptr) return 110;
    
    // 5. show window
    ShowWindow(_hWnd, SW_SHOW);
    SetFocus(_hWnd);
    
    return 0;
}

BOOL Window::run()
{
    // 6. run window
    
    return true;
}

void Window::deInit()
{
}

LRESULT WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    return DefWindowProc(hWnd, msg, wParam, lParam);
}