#include "StdAfx.h"
#include "Input.h"

LPDIRECTINPUT8 CInputDevice::ms_lpDI = NULL;
LPDIRECTINPUTDEVICE8 CInputKeyboard::ms_lpKeyboard = NULL;
bool CInputKeyboard::ms_bPressedKey[256];
char CInputKeyboard::ms_diks[256];

CInputDevice::CInputDevice()
{
}

CInputDevice::~CInputDevice()
{
SAFE_RELEASE(ms_lpDI);
}

HRESULT CInputDevice::CreateDevice(HWND /*hWnd*/)
{
if (ms_lpDI)
{
ms_lpDI->AddRef();
return S_OK;
}

HRESULT hr;

// Create a DInput object
if (FAILED(hr = DirectInput8Create(GetModuleHandle(NULL), DIRECTINPUT_VERSION,
IID_IDirectInput8, (VOID**) &ms_lpDI, NULL)))
return hr;

return S_OK;
}


CInputKeyboard::CInputKeyboard()
{
ResetKeyboard();
}

CInputKeyboard::~CInputKeyboard()
{
if (ms_lpKeyboard)
ms_lpKeyboard->Unacquire();

SAFE_RELEASE(ms_lpKeyboard);
}

void CInputKeyboard::ResetKeyboard()
{
memset(ms_diks, 0, sizeof(ms_diks));
memset(ms_bPressedKey, 0, sizeof(ms_bPressedKey));
}

bool CInputKeyboard::InitializeKeyboard(HWND hWnd)
{
NANOBEGIN

if (ms_lpKeyboard)
return true;

if (FAILED(CreateDevice(hWnd)))
return false;

HRESULT hr;

// Obtain an interface to the system keyboard device.
if (FAILED(hr = ms_lpDI->CreateDevice(GUID_SysKeyboard, &ms_lpKeyboard, NULL)))
return false;

if (FAILED(hr = ms_lpKeyboard->SetDataFormat(&c_dfDIKeyboard)))
return false;

// Alt + F4¸¦ À§ÇØ ºñµ¶Á¡ ¸ðµå·Î - [levites]
// DWORD dwCoopFlags = DISCL_FOREGROUND | DISCL_EXCLUSIVE;
// DWORD dwCoopFlags = DISCL_NONEXCLUSIVE | DISCL_BACKGROUND;
DWORD dwCoopFlags = DISCL_FOREGROUND | DISCL_NONEXCLUSIVE;

if (FAILED(hr = ms_lpKeyboard->SetCooperativeLevel(hWnd, dwCoopFlags)))
return false;

ms_lpKeyboard->Acquire();

NANOEND
return true;
}

void CInputKeyboard::UpdateKeyboard()
{
if (!ms_lpKeyboard)
return;

HRESULT hr;

hr = ms_lpKeyboard->GetDeviceState(sizeof(ms_diks), &ms_diks);

if (FAILED(hr))
{
hr = ms_lpKeyboard->Acquire();

// ÇöÀç ¾îÇø®ÄÉÀ̼ÇÀÌ ºñÈ°¼ºÈ­ µÇ¾î ÀÖ¾î ÀÔ·ÂÀ» ¹ÞÀ» ¼ö ¾ø´Ù.
//if (hr == DIERR_OTHERAPPHASPRIO || hr == DIERR_NOTACQUIRED);
return;
}

for (int i = 0; i < 256; ++i)
{
if (ms_diks & 0x80)
{
if (!IsPressed(i))
KeyDown(i);
}
else if (IsPressed(i))
KeyUp(i);
}
}

void CInputKeyboard::KeyDown(int iIndex)
{
ms_bPressedKey[iIndex] = true;
OnKeyDown(iIndex);
}

void CInputKeyboard::KeyUp(int iIndex)
{
ms_bPressedKey[iIndex] = false;
OnKeyUp(iIndex);
}

bool CInputKeyboard::IsPressed(int iIndex)
{
return ms_bPressedKey[iIndex];
}