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#include <DarkGDK.h>
#include <globstruct.h>

// Window processing procedure
LRESULT CALLBACK WndProcGUI(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	// Pre-Setup
	int i = 0;
	// Messages
	switch(msg)
	{
		// Window has been closed?
		case WM_CLOSE:
			DestroyWindow(hWnd);
			return 0;
	}
	// Process the default window procecedure
	return DefWindowProc(hWnd,msg,wParam,lParam);
}

HWND g_hWindows[0xffff];

void ConstructorWindows(void)
{
	for(int i = 0; i < 0xffff; i++)
	{
		g_hWindows[i] = NULL;
	}
}

// Make an extra window
void dbMakeWindow(int id, int width=500, int height=400, char* title="", int parent=0)
{
	if (id > 0)
	{
		id--;
		if (g_hWindows[id] == NULL)
		{
			// Register the window class
			WNDCLASSEX wc;
			wc.cbSize			= sizeof(WNDCLASSEX);
			wc.style			= 0;
			wc.cbClsExtra		= 0;
			wc.cbWndExtra		= 0;
			wc.lpfnWndProc		= WndProcGUI;
			wc.hInstance		= GetModuleHandle(NULL);
			wc.hIcon			= LoadIcon(NULL, IDI_APPLICATION);
			wc.hIconSm			= LoadIcon(NULL, IDI_APPLICATION);
			wc.hCursor			= LoadCursor(NULL, IDC_ARROW);
			wc.hbrBackground	= NULL; //(HBRUSH)COLOR_WINDOW;
			wc.lpszMenuName		= NULL;
			wc.lpszClassName	= "WndProcGUI";
			RegisterClassEx(&wc);
			// Create the window
			HWND hWnd = NULL;
			HWND hParent = NULL;
			if (parent == 0) hParent = g_pGlob->hWnd; else hParent = g_hWindows[parent];
			hWnd = CreateWindow("WndProcGUI",title,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,width,height,hParent,0,GetModuleHandle(0),0);
			if (!hWnd)
			{
				MessageBoxA(g_pGlob->hWnd, "Runtime Error G1001! Unable to create window!", "Error", MB_ICONERROR | MB_OK);
				g_iDarkGameSDKQuit = 1;
			}
			else
			{
				ShowWindow(hWnd,SW_SHOW);
				UpdateWindow(hWnd);
				SetFocus(hWnd);
				g_hWindows[id] = hWnd;
			}
		}
		else
		{
			MessageBoxA(g_pGlob->hWnd, "Runtime Error G1002! Window already exists!", "Error", MB_ICONERROR | MB_OK);
			g_iDarkGameSDKQuit = 1;
		}
	}
	else
	{
		MessageBoxA(g_pGlob->hWnd, "Runtime Error G1000! Invalid window ID!", "Error", MB_ICONERROR | MB_OK);
		g_iDarkGameSDKQuit = 1;
	}
}

// Delete a window
void dbDeleteWindow(int id)
{
	if (id > 0)
	{
		id--;
		DestroyWindow(g_hWindows[id]);
		g_hWindows[id] = NULL;
	}
	else if (id == 0)
	{
		DestroyWindow(g_pGlob->hWnd);
	}
	else
	{
		MessageBoxA(g_pGlob->hWnd, "Runtime Error G1000! Invalid window ID!", "Error", MB_ICONERROR | MB_OK);
		g_iDarkGameSDKQuit = 1;
	}
}

// Check if a window exists
int dbWindowExist(int id)
{
	if (id > 0)
	{
		id--;
		if (g_hWindows[id] != NULL)
		{
			return 1;
		}
	}
	return 0;
}

// Render to a window
void dbRenderToWindow(int index)
{
	if (dbWindowExist(index))
	{
		IDirect3DDevice9* pDevice;
		pDevice = dbGetDirect3DDevice();
		pDevice->BeginScene();
		pDevice->EndScene();
		pDevice->Present(NULL, NULL, g_hWindows[index-1], NULL);
	}
}

// Set the title of a window
void dbSetWindowTitle(int index, char* text)
{
	if (dbWindowExist(index))
	{
		SetWindowTextA(g_hWindows[index-1], text);
	}
}

// Main function for DGDK (I think)
void DarkGDK(void)
{
	// Required
	ConstructorWindows();
	// Syncing
	dbSyncOn();
	dbMakeObjectCube(1, 100.0f);
	dbMakeWindow(1);
	dbMakeWindow(2, 320, 240, "Window", 0);
	dbSetWindowTitle(1, "My Window!");
	// Other code here
	while(LoopGDK())
	{
		dbTurnObjectLeft(1, 0.3f);
		dbSync();
		dbRenderToWindow(1);
		dbRenderToWindow(2);
	}
	dbDeleteWindow(1);
}

void DarkGDK(void)
{
	// turn on sync rate and set maximum rate to 60 fps
	//dbSyncOn   ( );
	//dbSyncRate ( 60 );
	IDirect3DDevice9* pDevice = dbGetDirect3DDevice();
	IDirect3DSwapChain9* pSwapChain; pDevice->GetSwapChain(0, &pSwapChain);
	D3DPRESENT_PARAMETERS d3dpp;
	pSwapChain->GetPresentParameters(&d3dpp);
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.MultiSampleType = D3DMULTISAMPLE_2_SAMPLES;
	d3dpp.MultiSampleQuality = 0;
	d3dpp.hDeviceWindow = g_pGlob->hWnd;
	pDevice->Reset(&d3dpp);

	dbSyncOn(); dbSyncRate(30);
	dbMakeObjectCube(1, 100.0f);

	// our main loop
	while ( LoopGDK ( ) )
	{
		// update the screen
		dbTurnObjectLeft(1, 0.03f);
		dbSync();
	}

	// return back to windows
	return;
}

void DarkGDK(void)
{
	// turn on sync rate and set maximum rate to 60 fps
	dbSyncOn();
	dbSyncRate(60);
	dbSync();
	IDirect3D9* pObject = dbGetDirect3D();
	IDirect3DDevice9* pDevice = dbGetDirect3DDevice();
	IDirect3DSwapChain9* pSwapChain; pDevice->GetSwapChain(0, &pSwapChain);
	D3DPRESENT_PARAMETERS d3dpp;
	pSwapChain->GetPresentParameters(&d3dpp);
	pDevice->Release();
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.MultiSampleType = D3DMULTISAMPLE_6_SAMPLES;
	d3dpp.MultiSampleQuality = 0;
	d3dpp.hDeviceWindow = g_pGlob->hWnd;
	pObject->CreateDevice(0, D3DDEVTYPE_HAL, g_pGlob->hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &pDevice);
	dbSync();
	dbMakeObjectCube(1, 100.0f);

	while(LoopGDK())
	{
		dbTurnObjectLeft(1, 0.3f);
		dbSync();
	}
}

void twSetGadgetAlpha(DWORD dwGadget, DWORD dwAlpha)
{
    if (dwAlpha < 1)
        dwAlpha = 0;
    if (dwAlpha > 254)
        dwAlpha = 255;
    if (twdTestGadget((sGadget*)dwGadget))
    {
        HWND hWnd = ((sGadget*)dwGadget)->m_Window;
        typedef DWORD (WINAPI* PSLWA)(HWND, DWORD, BYTE, DWORD);
        PSLWA pSetLayeredWindowAttributes;
        HMODULE hUser32 = LoadLibraryA("User32.dll");
        pSetLayeredWindowAttributes = (PSLWA)GetProcAddress(hUser32, "SetLayeredWindowAttributes");
        if (pSetLayeredWindowAttributes != NULL)
        {
            pSetLayeredWindowAttributes(hWnd, 0, (BYTE)dwAlpha, 2); // Last parameter is LWA_ALPHA
        }
        FreeLibrary(hUser32);
    }
}