/* Copyright (C) 2014
 * swift project community / contributors
 *
 * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
 * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
 * including this file, may be copied, modified, propagated, or distributed except according to the terms
 * contained in the LICENSE file.
 */

//! \cond PRIVATE

#include "blackcore/voicechannelvatlib.h"
#include "blackmisc/logmessage.h"
#include "blackmisc/statusmessage.h"

#include <QList>
#include <QStringList>
#include <QtGlobal>

using namespace BlackMisc;
using namespace BlackMisc::Audio;
using namespace BlackMisc::Aviation;

namespace BlackCore
{
    CVoiceChannelVatlib::CVoiceChannelVatlib(VatAudioService audioService, VatUDPAudioPort udpPort, QObject *parent)
        : IVoiceChannel(parent),
          m_audioService(audioService),
          m_udpPort(udpPort)
    {
        m_voiceChannel.reset(Vat_CreateVoiceChannel(m_audioService, "", 3782, "", "", m_udpPort));
        Vat_SetConnectionChangedHandler(m_voiceChannel.data(), roomStatusUpdate, this);
        Vat_SetClientJoinedHandler(m_voiceChannel.data(), processUserJoined, this);
        Vat_SetClientLeftHandler(m_voiceChannel.data(), processUserLeft, this);
        Vat_SetVoiceTransmissionChangedHandler(m_voiceChannel.data(), processTransmissionChange, this);

    }

    CVoiceChannelVatlib::~CVoiceChannelVatlib()
    {
        Q_ASSERT(m_roomStatus == IVoiceChannel::Disconnected);
    }

    void CVoiceChannelVatlib::joinVoiceRoom(const CVoiceRoom &voiceRoom)
    {
        if (m_roomStatus == IVoiceChannel::Connecting || m_roomStatus == IVoiceChannel::Connected) return;

        // No one else is using this voice room, so prepare to join
        m_voiceRoom = voiceRoom;
        Vat_SetRoomInfo(m_voiceChannel.data(), qPrintable(voiceRoom.getHostname()), 3782,
                        qPrintable(voiceRoom.getChannel()),
                        qPrintable(m_callsign.toQString()));

        CLogMessage(this).debug() << "Joining voice room " << m_voiceRoom.getVoiceRoomUrl();
        Vat_JoinRoom(m_voiceChannel.data());
    }

    // Leave room
    void CVoiceChannelVatlib::leaveVoiceRoom()
    {
        // If this room is not connected, there is nothing to do
        if (m_roomStatus == IVoiceChannel::Disconnecting || m_roomStatus == IVoiceChannel::Disconnected) return;

        CLogMessage(this).debug() << "Leaving voice room " << m_voiceRoom.getVoiceRoomUrl();
        Vat_DisconnectFromRoom(m_voiceChannel.data());
        m_voiceRoom = {};
        m_listCallsigns = {};
    }

    CCallsignSet CVoiceChannelVatlib::getVoiceRoomCallsigns() const
    {
        return m_listCallsigns;
    }

    void CVoiceChannelVatlib::setOwnAircraftCallsign(const CCallsign &callsign)
    {
        m_callsign = callsign;
    }

    BlackMisc::Audio::CVoiceRoom CVoiceChannelVatlib::getVoiceRoom() const
    {
        return m_voiceRoom;
    }

    bool CVoiceChannelVatlib::isMuted() const
    {
        // Remove
        return false;
    }

    void CVoiceChannelVatlib::setVolume(int /* volume */)
    {
        // Remove
    }

    int CVoiceChannelVatlib::getVolume() const
    {
        // Remove
        return 100;
    }

    VatVoiceChannel CVoiceChannelVatlib::getVoiceChannel() const
    {
        return m_voiceChannel.data();
    }

    CCallsign CVoiceChannelVatlib::extractCallsign(const QString &name)
    {
        CCallsign callsign;
        if (name.isEmpty()) return callsign;

        // callsign might contain: VATSIM id, user name
        if (name.contains(" "))
        {
            QStringList parts = name.split(" ");
            callsign = CCallsign(parts[0]);
            // I throw away VATSIM id here, maybe we could use it
        }
        else
        {
            callsign = CCallsign(name);
        }

        return callsign;
    }

    void CVoiceChannelVatlib::userJoinedVoiceRoom(VatVoiceChannel, int /** id **/, const char *name)
    {
        CCallsign callsign(extractCallsign(name));
        m_listCallsigns.push_back(callsign);
        emit userJoinedRoom(callsign);
    }

    void CVoiceChannelVatlib::userLeftVoiceRoom(VatVoiceChannel, int /** id **/, const char *name)
    {
        CCallsign callsign(extractCallsign(name));
        m_listCallsigns.remove(callsign);
        emit userLeftRoom(callsign);
    }

    void CVoiceChannelVatlib::transmissionChanged(VatVoiceChannel, VatVoiceTransmissionStatus status)
    {
        if (status == vatVoiceStarted) emit audioStarted();
        else emit audioStopped();
    }

    void CVoiceChannelVatlib::updateRoomStatus(VatVoiceChannel channel, VatConnectionStatus oldVatStatus, VatConnectionStatus newVatStatus)
    {
        Q_UNUSED(channel);
        Q_UNUSED(oldVatStatus);

        IVoiceChannel::ConnectionStatus oldStatus = m_roomStatus;
        switch (newVatStatus)
        {
        case vatStatusConnecting:
        {
            m_roomStatus = IVoiceChannel::Connecting;
            break;
        }
        case vatStatusConnected:
        {
            m_voiceRoom.setConnected(true);
            m_roomStatus = IVoiceChannel::Connected;
            break;
        }
        case vatStatusDisconnecting:
        {
            m_roomStatus = IVoiceChannel::Disconnecting;
            break;
        }
        case vatStatusDisconnected:
        {
            // Clear all internals
            m_listCallsigns.clear();
            m_voiceRoom = {};
            m_roomStatus = IVoiceChannel::Disconnected;
            break;
        }
        default:
            break;
        }
        emit connectionStatusChanged(oldStatus, m_roomStatus);
    }

    //! Cast void* to a pointer of CVoiceChannelVatlib
    CVoiceChannelVatlib *cbvar_cast_voiceChannel(void *cbvar)
    {
        return static_cast<CVoiceChannelVatlib *>(cbvar);
    }

    void CVoiceChannelVatlib::processUserJoined(VatVoiceChannel channel, int id, const char *name, void *cbVar)
    {
        auto obj = cbvar_cast_voiceChannel(cbVar);
        obj->userJoinedVoiceRoom(channel, id, name);
    }

    void CVoiceChannelVatlib::processUserLeft(VatVoiceChannel channel, int id, const char *name, void *cbVar)
    {
        auto obj = cbvar_cast_voiceChannel(cbVar);
        obj->userLeftVoiceRoom(channel, id, name);
    }

    void CVoiceChannelVatlib::processTransmissionChange(VatVoiceChannel channel, VatVoiceTransmissionStatus status, void *cbVar)
    {
        auto obj = cbvar_cast_voiceChannel(cbVar);
        obj->transmissionChanged(channel, status);
    }

    void CVoiceChannelVatlib::roomStatusUpdate(VatVoiceChannel channel, VatConnectionStatus oldStatus, VatConnectionStatus newStatus, void *cbVar)
    {
        auto obj = cbvar_cast_voiceChannel(cbVar);
        obj->updateRoomStatus(channel, oldStatus, newStatus);
    }
} // ns

//! \endcond