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#include "devicepluginphilipshue.h"

#include "plugin/device.h"
#include "devicemanager.h"
#include "types/param.h"
#include "huebridgeconnection.h"

#include <QDebug>
#include <QStringList>
#include <QColor>

VendorId hueVendorId = VendorId("");

DeviceClassId hueDeviceClassId = DeviceClassId("d8f4c397-e05e-47c1-8917-8e72d4d0d47c");

StateTypeId hueColorStateTypeId = StateTypeId("d25423e7-b924-4b20-80b6-77eecc65d089");
ActionTypeId hueSetColorActionTypeId = ActionTypeId("29cc299a-818b-47b2-817f-c5a6361545e4");

StateTypeId huePowerStateTypeId = StateTypeId("6ac64eee-f356-4ae4-bc85-8c1244d12b02");
ActionTypeId hueSetPowerActionTypeId = ActionTypeId("7782d91e-d73a-4321-8828-da768e2f6827");

StateTypeId hueBrightnessStateTypeId = StateTypeId("411f489c-4bc9-42f7-b47d-b0581dc0c29e");
ActionTypeId hueSetBrightnessActionTypeId = ActionTypeId("3bc95552-cba0-4222-abd5-9b668132e442");

StateTypeId hueReachableStateTypeId = StateTypeId("15794d26-fde8-4a61-8f83-d7830534975f");

DevicePluginPhilipsHue::DevicePluginPhilipsHue():
    m_discovery(new Discovery(this))
{
    connect(m_discovery, &Discovery::discoveryDone, this, &DevicePluginPhilipsHue::discoveryDone);

    m_bridge = new HueBridgeConnection(this);
    connect(m_bridge, &HueBridgeConnection::createUserFinished, this, &DevicePluginPhilipsHue::createUserFinished);
    connect(m_bridge, &HueBridgeConnection::getFinished, this, &DevicePluginPhilipsHue::getFinished);
}

DeviceManager::HardwareResources DevicePluginPhilipsHue::requiredHardware() const
{
    return DeviceManager::HardwareResourceTimer;
}

void DevicePluginPhilipsHue::startMonitoringAutoDevices()
{
    // TODO: We could call the bridge to discover new light bulbs here maybe?
    // Although we maybe want to think of a user triggered approach to do such things.
}

QList<ParamType> DevicePluginPhilipsHue::configurationDescription() const
{
    QList<ParamType> params;
    return params;
}

QPair<DeviceManager::DeviceError, QString> DevicePluginPhilipsHue::discoverDevices(const DeviceClassId &deviceClassId, const ParamList &params)
{
    Q_UNUSED(deviceClassId)
    Q_UNUSED(params)
    m_discovery->findBridges(4000);
    return report(DeviceManager::DeviceErrorAsync);
}

QPair<DeviceManager::DeviceSetupStatus, QString> DevicePluginPhilipsHue::setupDevice(Device *device)
{
    qDebug() << "setupDevice" << device->params();

    Light *light = nullptr;

    // Lets see if this a a newly added device... In which case its hue id number is not set, well, -1...
    if (device->paramValue("number").toInt() == -1) {
        if (m_unconfiguredLights.count() > 0) {
            light = m_unconfiguredLights.takeFirst();
            device->setParamValue("number", light->id());
        } else {
            // this shouldn't ever happen
            return reportDeviceSetup(DeviceManager::DeviceSetupStatusFailure, "Device not configured yet and no discovered devices around.");
        }
    } else {
        // In this case it most likely comes from the config. Just read all values from there...
        light = new Light(QHostAddress(device->paramValue("ip").toString()), device->paramValue("username").toString(), device->paramValue("number").toInt());
    }

    connect(light, &Light::stateChanged, this, &DevicePluginPhilipsHue::lightStateChanged);
    light->refresh();

    m_lights.insert(light, device);
    m_asyncSetups.insert(light, device);

    // If we have more unconfigured lights around, lets add them as auto devices
    QList<DeviceDescriptor> descriptorList;
    while (!m_unconfiguredLights.isEmpty()) {
        Light *light = m_unconfiguredLights.takeFirst();
        DeviceDescriptor descriptor(hueDeviceClassId, light->name());
        ParamList params;
        params.append(Param("number", light->id()));
        params.append(Param("ip", light->ip().toString()));
        params.append(Param("username", light->username()));
        descriptor.setParams(params);
        descriptorList.append(descriptor);
    }
    if (!descriptorList.isEmpty()) {
        qDebug() << "adding" << descriptorList.count() << "autodevices";
        metaObject()->invokeMethod(this, "autoDevicesAppeared", Qt::QueuedConnection, Q_ARG(DeviceClassId, hueDeviceClassId), Q_ARG(QList<DeviceDescriptor>, descriptorList));
    }

    return reportDeviceSetup(DeviceManager::DeviceSetupStatusAsync);
}

void DevicePluginPhilipsHue::deviceRemoved(Device *device)
{
    if (!m_lights.values().contains(device)) {
        return;
    }

    Light *light = m_lights.key(device);
    m_lights.remove(light);
    m_unconfiguredLights.append(light);
}

QPair<DeviceManager::DeviceSetupStatus, QString> DevicePluginPhilipsHue::confirmPairing(const QUuid &pairingTransactionId, const DeviceClassId &deviceClassId, const ParamList &params)
{
    Param ipParam;
    foreach (const Param &param, params) {
        if (param.name() == "ip") {
            ipParam = param;
        }
    }
    if (!ipParam.isValid()) {
        return reportDeviceSetup(DeviceManager::DeviceSetupStatusFailure, "Missing parameter: ip");
    }
    Param usernameParam;
    foreach (const Param &param, params) {
        if (param.name() == "username") {
            usernameParam = param;
        }
    }
    if (!usernameParam.isValid()) {
        return reportDeviceSetup(DeviceManager::DeviceSetupStatusFailure, "Missing parameter: username");
    }

    int id = m_bridge->createUser(QHostAddress(ipParam.value().toString()), usernameParam.value().toString());
    PairingInfo pi;
    pi.pairingTransactionId = pairingTransactionId;
    pi.ipParam = ipParam;
    pi.usernameParam = usernameParam;
    m_pairings.insert(id, pi);
    return reportDeviceSetup(DeviceManager::DeviceSetupStatusAsync);
}

void DevicePluginPhilipsHue::guhTimer()
{
    foreach (Light *light, m_lights.keys()) {
        light->refresh();
    }
}

QPair<DeviceManager::DeviceError, QString> DevicePluginPhilipsHue::executeAction(Device *device, const Action &action)
{
    qDebug() << "Should execute action in hue plugin";

    Light *light = m_lights.key(device);
    if (!light) {
        return report(DeviceManager::DeviceErrorDeviceNotFound, device->id().toString());
    }

    if (!light->reachable()) {
        return report(DeviceManager::DeviceErrorSetupFailed, "This light is currently not reachable.");
    }

    if (action.actionTypeId() == hueSetColorActionTypeId) {
        light->setColor(action.param("color").value().value<QColor>());
    } else if (action.actionTypeId() == hueSetPowerActionTypeId) {
        light->setOn(action.param("power").value().toBool());
    } else if (action.actionTypeId() == hueSetBrightnessActionTypeId) {
        light->setBri(action.param("brightness").value().toInt());
    }
    return report();
}

void DevicePluginPhilipsHue::discoveryDone(const QList<QHostAddress> &bridges)
{
    qDebug() << "discovered bridges" << bridges.count();
    QList<DeviceDescriptor> deviceDescriptors;
    foreach (const QHostAddress &bridge, bridges) {
        DeviceDescriptor descriptor(hueDeviceClassId, "Philips Hue bridge", bridge.toString());
        ParamList params;
        Param param("ip", bridge.toString());
        params.append(param);
        Param userParam("username", "guh-" + QUuid::createUuid().toString().remove(QRegExp("[\\{\\}]*")).remove(QRegExp("\\-[0-9a-f\\-]*")));
        params.append(userParam);
        Param numberParam("number", -1);
        params.append(numberParam);
        descriptor.setParams(params);
        deviceDescriptors.append(descriptor);
    }

    emit devicesDiscovered(hueDeviceClassId, deviceDescriptors);
}

void DevicePluginPhilipsHue::createUserFinished(int id, const QVariant &response)
{
    qDebug() << "createuser response" << response;

    PairingInfo pairingInfo = m_pairings.take(id);
    if (response.toMap().contains("error")) {
        qDebug() << "Failed to pair Hue bridge:" << response.toMap().value("error").toMap().value("description");
        emit pairingFinished(pairingInfo.pairingTransactionId, DeviceManager::DeviceSetupStatusFailure, "Pairing failed:" + response.toMap().value("error").toMap().value("description").toString());
        return;
    }

    // Paired successfully, check how many lightbulbs there are

    int getLightsId = m_bridge->get(QHostAddress(pairingInfo.ipParam.value().toString()), pairingInfo.usernameParam.value().toString(), "lights", this, "getLightsFinished");
    m_pairings.insert(getLightsId, pairingInfo);

}

void DevicePluginPhilipsHue::getLightsFinished(int id, const QVariant &params)
{
    qDebug() << "getlightsfinished" << params;
    PairingInfo pairingInfo = m_pairings.take(id);

    if (params.toMap().count() == 0) {
        qWarning() << "No light bulbs found on this hue bridge... Cannot proceed with pairing.";
        emit pairingFinished(pairingInfo.pairingTransactionId, DeviceManager::DeviceSetupStatusFailure, "No light bulbs found on this Hue bridge.");
        return;
    }

    // Store a list of all known Lights
    foreach (const QString &lightId, params.toMap().keys()) {
        Light *light = new Light(QHostAddress(pairingInfo.ipParam.value().toString()), pairingInfo.usernameParam.value().toString(), lightId.toInt(), this);
        m_unconfiguredLights.insert(lightId.toInt(), light);
    }

    emit pairingFinished(pairingInfo.pairingTransactionId, DeviceManager::DeviceSetupStatusSuccess, QString());

    // If we have more than one device on that bridge, tell DeviceManager that there are more.
    if (params.toMap().count() > 1) {
//        emit autoDevicesAppeared();
    }
}

void DevicePluginPhilipsHue::getFinished(int id, const QVariant &params)
{
    qDebug() << "got lights" << params;
}

void DevicePluginPhilipsHue::lightStateChanged()
{
    Light *light = static_cast<Light*>(sender());

    Device *device;
    if (m_asyncSetups.contains(light)) {
        device = m_asyncSetups.take(light);
        device->setName(light->name());
        emit deviceSetupFinished(device, DeviceManager::DeviceSetupStatusSuccess, QString());
    } else {
        device = m_lights.value(light);
    }
    if (!device) {
        return;
    }
    device->setStateValue(hueReachableStateTypeId, light->reachable());
    device->setStateValue(hueColorStateTypeId, QVariant::fromValue(light->color()));
    device->setStateValue(huePowerStateTypeId, light->on());
    device->setStateValue(hueBrightnessStateTypeId, light->bri());
}