/****************************************************************************
 ** ScStw Libraries
 ** Copyright (C) 2020  Itsblue development
 **
 ** This program is free software: you can redistribute it and/or modify
 ** it under the terms of the GNU General Public License as published by
 ** the Free Software Foundation, either version 3 of the License, or
 ** (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU General Public License for more details.
 **
 ** You should have received a copy of the GNU General Public License
 ** along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ****************************************************************************/

#include "scstwremotemonitorrace.h"

ScStwRemoteMonitorRace::ScStwRemoteMonitorRace(ScStwClient *monitorClient, QObject *parent) : ScStwRace(parent)
{
    this->currentlyWaitingForClimbers = false;

    this->scStwClient = monitorClient;

    this->scStwClient->addSignalSubscription(ScStw::RaceStateChanged);
    this->scStwClient->addSignalSubscription(ScStw::TimersChanged);
    this->scStwClient->addSignalSubscription(ScStw::CurrentStartDelayChanged);

    connect(this->scStwClient, &ScStwClient::stateChanged, this, &ScStwRemoteMonitorRace::handleClientStateChanged);
    connect(this->scStwClient, &ScStwClient::gotSignal, this, &ScStwRemoteMonitorRace::handleBaseStationSignal);
}

// --------------------------
// --- Main Functionality ---
// --------------------------

ScStw::StatusCode ScStwRemoteMonitorRace::start() {
    if(this->getState() != ScStwRace::IDLE && this->getState() != ScStwRace::WAITING)
        return ScStw::CurrentStateNotVaildForOperationError;

    qDebug() << "+ --- starting race";

    QVariantMap reply = this->scStwClient->sendCommand(ScStw::StartRaceCommand);

    return ScStw::StatusCode(reply["status"].toInt());
}

ScStw::StatusCode ScStwRemoteMonitorRace::cancel() {
    if(this->getState() != PREPAIRING && this->getState() != WAITING && this->getState() != STARTING && this->getState() != RUNNING)
        return ScStw::CurrentStateNotVaildForOperationError;

    qDebug() << "+ --- stopping race";

    QVariantMap reply = this->scStwClient->sendCommand(ScStw::CancelRaceCommand);

    return ScStw::StatusCode(reply["status"].toInt());
}

ScStw::StatusCode ScStwRemoteMonitorRace::stop() {
    if(this->getState() != ScStwRace::RUNNING && this->getState() != ScStwRace::STARTING)
        return ScStw::CurrentStateNotVaildForOperationError;

    qDebug() << "+ --- stopping race";

    QVariantMap reply = this->scStwClient->sendCommand(ScStw::StopRaceCommand);

    return ScStw::StatusCode(reply["status"].toInt());
}

ScStw::StatusCode ScStwRemoteMonitorRace::reset() {
    if(this->getState() != ScStwRace::STOPPED && this->getState() != ScStwRace::INCIDENT)
        return ScStw::CurrentStateNotVaildForOperationError;

    qDebug() << "+ --- resetting race";

    QVariantMap reply = this->scStwClient->sendCommand(ScStw::ResetRaceCommand);

    return ScStw::StatusCode(reply["status"].toInt());
}


// -------------------------
// --- Base Station sync ---
// -------------------------

void ScStwRemoteMonitorRace::handleClientStateChanged() {
    // TODO
    switch (this->scStwClient->getState()) {
    case ScStwClient::CONNECTED:
        break;
    default:
        this->timers.clear();
        this->setState(IDLE);
        break;
    }
}

/**
 * @brief ScStwAppBackend::handleBaseStationUpdate
 *
 * Function to handle an update, sent by the base station, which indicates
 * that some remote value (like a state) has changed
 *
 * @param data
 */
void ScStwRemoteMonitorRace::handleBaseStationSignal(ScStw::SignalKey key, QVariant data) {
    //qDebug() << "got signal: " << data;
    switch (key) {
    case ScStw::RaceStateChanged:
    {
        // the remote race state has changed
        this->setState( ScStwRace::RaceState( data.toInt() ) );
        break;
    }
    case ScStw::TimersChanged:
    {
        // the remote timers have changed
        this->refreshRemoteTimers(data.toList());
        break;
    }
    case ScStw::CurrentStartDelayChanged:
    {
        // the next start action has changed
        this->currentStartTotalDelay = data.toList()[ScStwRace::CurrentStartStateTotalDelay].toInt();
        this->currentStartDelayStartedAt = QDateTime::currentMSecsSinceEpoch() - (this->currentStartTotalDelay * data.toList()[ScStwRace::CurrentStartStateDelayProgress].toDouble());
        this->currentlyWaitingForClimbers = data.toList()[ScStwRace::CurrentStartStateDelayProgress].toDouble() == 0 && this->currentStartTotalDelay == -1;

        emit this->currentStartDelayChanged();

        qDebug() << "Current start delay changed: total:" << this->currentStartTotalDelay << " progress: " << data.toList()[ScStwRace::CurrentStartStateDelayProgress].toDouble();

        break;
    }
    case ScStw::InvalidSignal:
        return;

    default:
        return;
    }
}

bool ScStwRemoteMonitorRace::refreshRemoteTimers(QVariantList remoteTimers) {

        if(remoteTimers.length() != this->timers.length()){
            // local timers are out of sync

            // delete all current timers
            foreach(ScStwTimer * locTimer, this->timers){
                delete locTimer;
            }

            this->timers.clear();

            foreach(QVariant remoteTimer, remoteTimers){
                // create a local timer for each remote timer
                ScStwTimer * timer = new ScStwTimer(this, true);
                this->timers.append(timer);
                connect(timer, &ScStwTimer::stateChanged, this, &ScStwRace::timersChanged);
                connect(timer, &ScStwTimer::reactionTimeChanged, this, &ScStwRace::timersChanged);
            }
        }

        foreach(QVariant remoteTimer, remoteTimers){
            int currId = remoteTimer.toMap()["id"].toInt();
            ScStwTimer::TimerState newState = ScStwTimer::TimerState(remoteTimer.toMap()["state"].toInt());
            double currentMSecsSinceEpoch = QDateTime::currentMSecsSinceEpoch();

            this->timers[currId]->setStartTime(currentMSecsSinceEpoch - remoteTimer.toMap()["currentTime"].toDouble());

            if(newState >= ScStwTimer::WAITING)
                this->timers[currId]->setStopTime(currentMSecsSinceEpoch);

            this->timers[currId]->setReactionTime(remoteTimer.toMap()["reactionTime"].toDouble());

            this->timers[currId]->setState(newState, true);

            this->timers[currId]->setLetter(remoteTimer.toMap()["letter"].toString());
        }

        return true;
}

bool ScStwRemoteMonitorRace::addTimer(ScStwTimer* timer) {
    Q_UNUSED(timer)
    return false;
}

QVariantList ScStwRemoteMonitorRace::getCurrentStartDelay() {
    int nextActionDelay = -1;
    double nextActionDelayProg = -1;

    if(this->getState() == WAITING && this->currentlyWaitingForClimbers) {
        nextActionDelayProg = 0;
    }
    else if(this->getState() == PREPAIRING || this->getState() == WAITING) {
        // get the total delay and the delay progress of the next action timer
        double elapsed = QDateTime::currentMSecsSinceEpoch() - this->currentStartDelayStartedAt;
        nextActionDelay = this->currentStartTotalDelay;
        if(elapsed < 0 || elapsed > nextActionDelay) {
            elapsed = nextActionDelay;
        }
        nextActionDelayProg = elapsed / nextActionDelay;
    }

    return {
        nextActionDelay,
        nextActionDelayProg
    };
}