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#include <stdio.h>
#include <windows.h>
#include <setupapi.h>
#include <devguid.h>
#include <regstr.h>
#include <bthdef.h>
#include <Bluetoothleapis.h>
#pragma comment(lib, "SetupAPI")
#pragma comment(lib, "BluetoothApis.lib")

#define TO_SEARCH_DEVICE_UUID "{0000180d-0000-1000-8000-00805f9b34fb}"

HANDLE GetBLEHandle(__in GUID svcGuid)
{
HDEVINFO hDevInfo;
SP_DEVICE_INTERFACE_DATA devIntfData;
SP_DEVINFO_DATA devInfoData;
GUID deviceGUID = svcGuid;
HANDLE hFind = NULL;

hDevInfo = SetupDiGetClassDevs(&deviceGUID, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);

if (hDevInfo == INVALID_HANDLE_VALUE) return NULL;

devIntfData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
devInfoData.cbSize = sizeof(SP_DEVINFO_DATA);

for (DWORD i = 0; SetupDiEnumDeviceInterfaces(hDevInfo, NULL, &deviceGUID, i, &devIntfData); i++)
{
SP_DEVICE_INTERFACE_DETAIL_DATA DeviceInterfaceDetailData;

DeviceInterfaceDetailData.cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);

DWORD size = 0;

if (!SetupDiGetDeviceInterfaceDetail(hDevInfo, &devIntfData, NULL, 0, &size, 0))
{
int err = GetLastError();

if (err == ERROR_NO_MORE_ITEMS) break;

PSP_DEVICE_INTERFACE_DETAIL_DATA pInterfaceDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA)GlobalAlloc(GPTR, size);

pInterfaceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);

if (!SetupDiGetDeviceInterfaceDetail(hDevInfo, &devIntfData, pInterfaceDetailData, size, &size, &devInfoData))
break;

hFind = CreateFile(
pInterfaceDetailData->DevicePath,
GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);

GlobalFree(pInterfaceDetailData);
}
}

SetupDiDestroyDeviceInfoList(hDevInfo);
return hFind;
}

int main()
{
GUID svcGuid;
CLSIDFromString(TEXT(TO_SEARCH_DEVICE_UUID), &svcGuid);

HANDLE hLEDevice = GetBLEHandle(svcGuid);

printf("Find Handle: 0x%x \r\n", hLEDevice);

//-------------------------------------------
USHORT serviceBufferCount;

HRESULT hr = BluetoothGATTGetServices(
hLEDevice,
0,
NULL,
&serviceBufferCount,
BLUETOOTH_GATT_FLAG_NONE);

if (hr != HRESULT_FROM_WIN32(ERROR_MORE_DATA)) {
printf("BluetoothGATTGetServices - Need Alloc Buffer Size: %d \r\n", serviceBufferCount);
}

PBTH_LE_GATT_SERVICE pServiceBuffer = (PBTH_LE_GATT_SERVICE)
malloc(sizeof(BTH_LE_GATT_SERVICE) * serviceBufferCount);

if (pServiceBuffer == NULL) {
printf("pServiceBuffer out of memory\r\n");
}
else {
RtlZeroMemory(pServiceBuffer,
sizeof(BTH_LE_GATT_SERVICE) * serviceBufferCount);
}

USHORT numServices;
hr = BluetoothGATTGetServices(
hLEDevice,
serviceBufferCount,
pServiceBuffer,
&numServices,
BLUETOOTH_GATT_FLAG_NONE);

if (hr == S_OK) {
printf("BluetoothGATTGetServices - Service Count %d \r\n", numServices);
}
//-------------------------------------------
USHORT charBufferSize;
hr = BluetoothGATTGetCharacteristics(
hLEDevice,
pServiceBuffer,
0,
NULL,
&charBufferSize,
BLUETOOTH_GATT_FLAG_NONE);
if (HRESULT_FROM_WIN32(ERROR_MORE_DATA) == hr) {
printf("BluetoothGATTGetCharacteristics - Buffer Size %d \r\n", charBufferSize);
}

PBTH_LE_GATT_CHARACTERISTIC pCharBuffer;
if (charBufferSize > 0)
{
pCharBuffer = (PBTH_LE_GATT_CHARACTERISTIC)
malloc(charBufferSize * sizeof(BTH_LE_GATT_CHARACTERISTIC));

if (pCharBuffer == NULL) {
printf("pCharBuffer out of memory\r\n");
}
else {
RtlZeroMemory(pCharBuffer,
charBufferSize * sizeof(BTH_LE_GATT_CHARACTERISTIC));
}

USHORT numChars;
hr = BluetoothGATTGetCharacteristics(
hLEDevice,
pServiceBuffer,
charBufferSize,
pCharBuffer,
&numChars,
BLUETOOTH_GATT_FLAG_NONE);

if (hr == S_OK) {
printf("BluetoothGATTGetCharacteristics - Actual Data %d \r\n", numChars);
}

if (numChars != charBufferSize) {
printf("buffer size and buffer size actual size mismatch\r\n");
}
}
//-------------------------------------------

//-------------------------------------------

system("pause");
return 0;
}