#include "Window.h"

Window::Window()
{

}

LRESULT CALLBACK WndProc(HWND hwnd,UINT msg, WPARAM wparam, LPARAM lparam)
{
    //GetWindowLong(hwnd,)
    switch (msg)
    {
    case WM_CREATE:
    {
        // Event fired when the window is created
        // collected here..
        Window* window = (Window*)((LPCREATESTRUCT)lparam)->lpCreateParams;
        // .. and then stored for later lookup
        SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)window);
        window->setHWND(hwnd);
        window->onCreate();
        break;
    }
    case WM_SETFOCUS:
    {
        // Event fired when the window get focus
        Window* window = (Window*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
        window->onFocus();
        break;
    }
    case WM_KILLFOCUS:
    {
        // Event fired when the window lost focus
        Window* window = (Window*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
        window->onKillFocus();
        break;
    }
    case WM_DESTROY:
    {
        // Event fired when the window is destroyed
        Window* window =(Window*) GetWindowLongPtr(hwnd, GWLP_USERDATA);
        window->onDestroy();
        ::PostQuitMessage(0);
        break;
    }


    default:
        return ::DefWindowProc(hwnd, msg, wparam, lparam);
    }

    return NULL;
}


bool Window::init()
{
    //Setting up WNDCLASSEX object
    WNDCLASSEX wc;
    wc.cbClsExtra = NULL;
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.cbWndExtra = NULL;
    wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wc.hInstance = NULL;
    wc.lpszClassName = "MyWindowClass";
    wc.lpszMenuName = "";
    wc.style = NULL;
    wc.lpfnWndProc = &WndProc;

    if (!::RegisterClassEx(&wc)) // If the registration of class will fail, the function will return false
        return false;

    //Creation of the window
    m_hwnd=::CreateWindowEx(WS_EX_OVERLAPPEDWINDOW, "MyWindowClass", "DirectX Application",
        WS_CAPTION|WS_SYSMENU, CW_USEDEFAULT, CW_USEDEFAULT, 1024, 768,
        NULL, NULL, NULL, this);

    //if the creation fail return false
    if (!m_hwnd)
        return false;

    //show up the window
    ::ShowWindow(m_hwnd, SW_SHOW);
    ::UpdateWindow(m_hwnd);

    //set this flag to true to indicate that the window is initialized and running
    m_is_run = true;

    return true;
}

bool Window::broadcast()
{
    MSG msg;

    this->onUpdate();

    while (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    Sleep(1);

    return true;
}


bool Window::release()
{
    //Destroy the window
    if (!::DestroyWindow(m_hwnd))
        return false;

    return true;
}

bool Window::isRun()
{
    return m_is_run;
}

RECT Window::getClientWindowRect()
{
    RECT rc;
    ::GetClientRect(this->m_hwnd, &rc);
    return rc;
}

void Window::setHWND(HWND hwnd)
{
    this->m_hwnd = hwnd;
}

void Window::onCreate()
{
}

void Window::onUpdate()
{
}

void Window::onDestroy()
{
    m_is_run = false;
}

void Window::onFocus()
{
}

void Window::onKillFocus()
{
}

Window::~Window()
{
}