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#include "huaweifusionsolardiscovery.h"
#include "extern-plugininfo.h"

HuaweiFusionSolarDiscovery::HuaweiFusionSolarDiscovery(NetworkDeviceDiscovery *networkDeviceDiscovery, quint16 port, quint16 modbusAddress, QObject *parent) :
    QObject(parent),
    m_networkDeviceDiscovery(networkDeviceDiscovery),
    m_port(port),
    m_modbusAddress(modbusAddress)
{

}


void HuaweiFusionSolarDiscovery::startDiscovery()
{
    qCInfo(dcHuawei()) << "Discovery: Start searching for Huawei FusionSolar SmartDongle in the network...";
    NetworkDeviceDiscoveryReply *discoveryReply = m_networkDeviceDiscovery->discover();
    connect(discoveryReply, &NetworkDeviceDiscoveryReply::networkDeviceInfoAdded, this, &HuaweiFusionSolarDiscovery::checkNetworkDevice);
    connect(discoveryReply, &NetworkDeviceDiscoveryReply::finished, discoveryReply, &NetworkDeviceDiscoveryReply::deleteLater);
    connect(discoveryReply, &NetworkDeviceDiscoveryReply::finished, this, [=](){
        // Finish with some delay so the last added network device information objects still can be checked.
        QTimer::singleShot(3000, this, [this](){
            qCDebug(dcHuawei()) << "Discovery: Grace period timer triggered.";
            finishDiscovery();
        });
    });
}

NetworkDeviceInfos HuaweiFusionSolarDiscovery::discoveryResults() const
{
    return m_discoveryResults;
}

void HuaweiFusionSolarDiscovery::checkNetworkDevice(const NetworkDeviceInfo &networkDeviceInfo)
{
    // The dongle must have a huawei registered mac address
    if (!networkDeviceInfo.macAddressManufacturer().toLower().contains("huawei"))
        return;

    HuaweiFusionSolar *connection = new HuaweiFusionSolar(networkDeviceInfo.address(), m_port, m_modbusAddress, this);
    m_connections.append(connection);
    connect(connection, &HuaweiFusionSolar::reachableChanged, this, [=](bool reachable){
        if (!reachable) {
            // Disconnected ... done with this connection
            cleanupConnection(connection);
            return;
        }

        qCDebug(dcHuawei()) << "Discovery: --> Found" << networkDeviceInfo;
        m_discoveryResults.append(networkDeviceInfo);
    });

    // If we get any error...skip this host...
    connect(connection, &HuaweiFusionSolar::connectionErrorOccurred, this, [=](QModbusDevice::Error error){
        if (error != QModbusDevice::NoError) {
            qCDebug(dcHuawei()) << "Discovery: Connection error on" << networkDeviceInfo.address().toString() << "Continue...";;
            cleanupConnection(connection);
        }
    });

    // If check reachability failed...skip this host...
    connect(connection, &HuaweiFusionSolar::checkReachabilityFailed, this, [=](){
        qCDebug(dcHuawei()) << "Discovery: Check reachability failed on" << networkDeviceInfo.address().toString() << "Continue...";;
        cleanupConnection(connection);
    });

    // Try to connect, maybe it works, maybe not,
    // but retry only once to communicate with the device for reachability check...
    connection->setCheckReachableRetries(1);

    // Try to connect, maybe it works, maybe not...
    connection->connectDevice();
}

void HuaweiFusionSolarDiscovery::cleanupConnection(HuaweiFusionSolar *connection)
{
    if (m_connections.contains(connection)) {
        m_connections.removeAll(connection);
        connection->disconnectDevice();
        connection->deleteLater();
    }
}

void HuaweiFusionSolarDiscovery::finishDiscovery()
{
    qint64 durationMilliSeconds = QDateTime::currentMSecsSinceEpoch() - m_startDateTime.toMSecsSinceEpoch();

    // Cleanup any leftovers...we don't care any more
    foreach (HuaweiFusionSolar *connection, m_connections)
        cleanupConnection(connection);

    qCInfo(dcHuawei()) << "Discovery: Finished the discovery process. Found" << m_discoveryResults.count()
                       << "inverters in" << QTime::fromMSecsSinceStartOfDay(durationMilliSeconds).toString("mm:ss.zzz");

    emit discoveryFinished();
}