#include "GameCore.h"
#include "GameWindow.h"
#include "ScreenManager.h"

//Global WndProc (Can't be placed inside class :<  )
LRESULT CALLBACK GlobalWndProc(HWND hWnd, UINT message, 
							   WPARAM wParam, LPARAM lParam )
{
	HDC hdc;
	PAINTSTRUCT ps; //structure used by Windows to paint things
	switch(message)
	{
	case WM_CREATE:
		
		return DefWindowProc( hWnd, message, wParam, lParam );
		break;

	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		//do any windows drawing here
		EndPaint(hWnd, &ps);
		break;

	case WM_SETFOCUS:
		setWindowFocus(1);
		return DefWindowProc( hWnd, message, wParam, lParam );
		break;

	case WM_KILLFOCUS:
		setWindowFocus(0);
		return DefWindowProc( hWnd, message, wParam, lParam );
		break;

	case WM_DESTROY:
		GameError("Posting Destroy");
		PostQuitMessage(0);
		break;
		
	default:
		return DefWindowProc(hWnd, message,wParam,lParam);

	}

	return 0;
}

GameWindow::GameWindow()
{
	window_startX = 0;
	window_startY = 0;
	window_sizeX = ScreenManager::getWindowWidth();
	window_sizeY = ScreenManager::getWindowHeight();
	GameError("Created Game Window Object");
}

GameWindow::~GameWindow()
{
	CoUninitialize(); //to clean up windows a little better. not required.
	GameError("Terminating Game Window Object");
	//nothing we are killing this structure...
}

void GameWindow::MyRegisterClass(HINSTANCE hInstance, char* ATitle)
{
	WNDCLASSEX wcex;
	wcex.cbSize = sizeof(WNDCLASSEX);

	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = (WNDPROC)GlobalWndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION );
	wcex.hIconSm = LoadIcon(NULL, IDI_HAND);
	wcex.hCursor = LoadCursor( NULL, IDC_CROSS);
	wcex.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH);
	wcex.lpszMenuName = 0;
	wcex.lpszClassName = ATitle;
	

	RegisterClassEx(&wcex);
}

BOOL GameWindow::InitInstance(HINSTANCE hInst, int nCmdShow, char* ATitle, char* WTitle)
{
	
	hInstance = hInst;

	DWORD ws = WS_POPUP | WS_CAPTION | WS_SYSMENU | 
		WS_MINIMIZEBOX | WS_VISIBLE;

	RECT rc;
	rc.left = window_startX;
	rc.top = window_startY;
	rc.right = window_sizeX;
	rc.bottom = window_sizeY;
	AdjustWindowRect(&rc, ws, FALSE);

	hWnd = CreateWindow(
		ATitle,
		WTitle,
		ws,
		window_startX,
		window_startY,
		rc.right - rc.left + window_startX,
		rc.bottom - rc.top + window_startY,
		NULL,
		NULL,
		hInstance,
		NULL);

	if (!hWnd) {
		GameError("GOT A FALSE WINDOW - BAD NEWS");
		return FALSE;
	}

	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);

	return TRUE;
}

void GameWindow::SetWindowSize(int a, int b, int c, int d)
{
	window_startX = a;
	window_startY = b;
	window_sizeX = c;
	window_sizeY = d;
}

HWND & GameWindow::getHwnd()
{
	return hWnd;
}

HINSTANCE & GameWindow::get_hInstance()
{
	return hInstance;
}