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#include "serenum.h"

#include <QByteArray>

#include <QString>

#include <QDebug>

#include <windows.h>

#include <windef.h>

#include <setupapi.h>

#include <devguid.h>

#include <winreg.h>

#include <shlwapi.h>

//{4d36e978-e325-11ce-bfc1-08002be10318}

//DEFINE_GUID(GUID_DEVCLASS_PORTS, 0x4D36E978, 0xE325, 0x11CE, 0xBF, 0xC1, 0x08, 0x00, 0x2B, 0xE1, 0x03, 0x18 );

QList<SerialPortId> enumerateSerialPorts()

{

    DWORD index=0;

    SP_DEVINFO_DATA info;

    GUID guid = GUID_DEVCLASS_PORTS;

    HDEVINFO infoset = SetupDiGetClassDevs(&guid, 0, 0, DIGCF_PRESENT);

    QString valueName(16384, 0);

    QList<SerialPortId> list;

    for (index=0;;index++) {

        ZeroMemory(&info, sizeof(SP_DEVINFO_DATA));

        info.cbSize = sizeof(SP_DEVINFO_DATA);

        if (!SetupDiEnumDeviceInfo(infoset, index, &info))

            break;

        QString friendlyName;

        QString portName;

        DWORD size=0;

        SetupDiGetDeviceRegistryProperty(infoset, &info, SPDRP_FRIENDLYNAME, 0, 0, 0, &size);

        QByteArray ba(size, 0);

        if(SetupDiGetDeviceRegistryProperty(infoset, &info, SPDRP_FRIENDLYNAME, 0, (BYTE*)(ba.data()), size, 0)) {

            friendlyName = QString((const QChar*)(ba.constData()), ba.size() / 2 - 1);

        }

        HKEY key = SetupDiOpenDevRegKey(infoset, &info, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ);

        if(key != INVALID_HANDLE_VALUE) {

            //RegGetValue not supported on XP, SHRegGetValue not supported by mingw, so use the old method of enumerating all the values

            for (DWORD dwi=0;;dwi++) {

                DWORD vsize = valueName.size();

                if (ERROR_SUCCESS == RegEnumValue(key, dwi, (WCHAR*)(valueName.data()), &vsize, 0, 0, 0, &size)) {

                    if (valueName.startsWith("PortName")) {

                       QByteArray ba(size, 0);

                       vsize = valueName.size();

                       if(ERROR_SUCCESS == RegEnumValue(key, dwi, (WCHAR*)(valueName.data()), &vsize, 0, 0, (BYTE*)(ba.data()), &size)) {

                           portName = QString((const QChar*)(ba.constData()), ba.size() / 2 - 1);

                       }

                   }

                } else {

                    break;

                }

            }

            RegCloseKey(key);

        }

        SerialPortId id;

        id.portName = portName;

        id.friendlyName = friendlyName;

        list.append(id);

    }

    SetupDiDestroyDeviceInfoList(infoset);

    return list;

}