/**
 ******************************************************************************
 *
 * @file       configservowidget.cpp
 * @author     E. Lafargue & The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
 * @addtogroup GCSPlugins GCS Plugins
 * @{
 * @addtogroup ConfigPlugin Config Plugin
 * @{
 * @brief Servo input/output configuration panel for the config gadget
 *****************************************************************************/
/*
 * 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, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include "configoutputwidget.h"

#include "uavtalk/telemetrymanager.h"

#include <QDebug>
#include <QStringList>
#include <QtGui/QWidget>
#include <QtGui/QTextEdit>
#include <QtGui/QVBoxLayout>
#include <QtGui/QPushButton>

ConfigOutputWidget::ConfigOutputWidget(QWidget *parent) : ConfigTaskWidget(parent)
{
    m_config = new Ui_OutputWidget();
    m_config->setupUi(this);

	ExtensionSystem::PluginManager *pm = ExtensionSystem::PluginManager::instance();
	UAVObjectManager *objManager = pm->getObject<UAVObjectManager>();

	// First of all, put all the channel widgets into lists, so that we can
    // manipulate those:

	// NOTE: for historical reasons, we have objects below called ch0 to ch7, but the convention for OP is Channel 1 to Channel 8.
    outLabels << m_config->ch0OutValue
            << m_config->ch1OutValue
            << m_config->ch2OutValue
            << m_config->ch3OutValue
            << m_config->ch4OutValue
            << m_config->ch5OutValue
            << m_config->ch6OutValue
            << m_config->ch7OutValue;

    outSliders << m_config->ch0OutSlider
            << m_config->ch1OutSlider
            << m_config->ch2OutSlider
            << m_config->ch3OutSlider
            << m_config->ch4OutSlider
            << m_config->ch5OutSlider
            << m_config->ch6OutSlider
            << m_config->ch7OutSlider;

    outMin << m_config->ch0OutMin
            << m_config->ch1OutMin
            << m_config->ch2OutMin
            << m_config->ch3OutMin
            << m_config->ch4OutMin
            << m_config->ch5OutMin
            << m_config->ch6OutMin
            << m_config->ch7OutMin;

    outMax << m_config->ch0OutMax
            << m_config->ch1OutMax
            << m_config->ch2OutMax
            << m_config->ch3OutMax
            << m_config->ch4OutMax
            << m_config->ch5OutMax
            << m_config->ch6OutMax
            << m_config->ch7OutMax;

    reversals << m_config->ch0Rev
            << m_config->ch1Rev
            << m_config->ch2Rev
            << m_config->ch3Rev
            << m_config->ch4Rev
            << m_config->ch5Rev
            << m_config->ch6Rev
            << m_config->ch7Rev;

    UAVDataObject * obj = dynamic_cast<UAVDataObject*>(objManager->getObject(QString("ActuatorSettings")));
    QList<UAVObjectField*> fieldList = obj->getFields();
    foreach (UAVObjectField* field, fieldList) {
        if (field->getUnits().contains("channel")) {
            m_config->ch0Output->addItem(field->getName());
            m_config->ch1Output->addItem(field->getName());
            m_config->ch2Output->addItem(field->getName());
            m_config->ch3Output->addItem(field->getName());
            m_config->ch4Output->addItem(field->getName());
            m_config->ch5Output->addItem(field->getName());
            m_config->ch6Output->addItem(field->getName());
            m_config->ch7Output->addItem(field->getName());
        }
    }


    for (int i = 0; i < 8; i++) {
        connect(outMin[i], SIGNAL(editingFinished()), this, SLOT(setChOutRange()));
        connect(outMax[i], SIGNAL(editingFinished()), this, SLOT(setChOutRange()));
        connect(reversals[i], SIGNAL(toggled(bool)), this, SLOT(reverseChannel(bool)));
        // Now connect the channel out sliders to our signal to send updates in test mode
        connect(outSliders[i], SIGNAL(valueChanged(int)), this, SLOT(sendChannelTest(int)));
    }

    connect(m_config->channelOutTest, SIGNAL(toggled(bool)), this, SLOT(runChannelTests(bool)));

    requestRCOutputUpdate();

    connect(m_config->saveRCOutputToSD, SIGNAL(clicked()), this, SLOT(saveRCOutputObject()));
    connect(m_config->saveRCOutputToRAM, SIGNAL(clicked()), this, SLOT(sendRCOutputUpdate()));
    connect(m_config->getRCOutputCurrent, SIGNAL(clicked()), this, SLOT(requestRCOutputUpdate()));

    connect(parent, SIGNAL(autopilotConnected()),this, SLOT(requestRCOutputUpdate()));

    firstUpdate = true;

	enableControls(false);

	// Listen to telemetry connection events
	if (pm)
	{
		TelemetryManager *tm = pm->getObject<TelemetryManager>();
		if (tm)
		{
			connect(tm, SIGNAL(myStart()), this, SLOT(onTelemetryStart()));
			connect(tm, SIGNAL(myStop()), this, SLOT(onTelemetryStop()));
			connect(tm, SIGNAL(connected()), this, SLOT(onTelemetryConnect()));
			connect(tm, SIGNAL(disconnected()), this, SLOT(onTelemetryDisconnect()));
		}
	}
}

ConfigOutputWidget::~ConfigOutputWidget()
{
   // Do nothing
}



// ************************************
// telemetry start/stop connect/disconnect signals

void ConfigOutputWidget::onTelemetryStart()
{
}

void ConfigOutputWidget::onTelemetryStop()
{
}

void ConfigOutputWidget::onTelemetryConnect()
{
	enableControls(true);
}

void ConfigOutputWidget::onTelemetryDisconnect()
{
	enableControls(false);
}

// ************************************

void ConfigOutputWidget::enableControls(bool enable)
{
	m_config->saveRCOutputToSD->setEnabled(enable);
	m_config->saveRCOutputToRAM->setEnabled(enable);
	m_config->getRCOutputCurrent->setEnabled(enable);
}

// ************************************

/**
  Toggles the channel testing mode by making the GCS take over
  the ActuatorCommand objects
  */
void ConfigOutputWidget::runChannelTests(bool state)
{
    ExtensionSystem::PluginManager *pm = ExtensionSystem::PluginManager::instance();
    UAVObjectManager *objManager = pm->getObject<UAVObjectManager>();

    UAVDataObject* obj = dynamic_cast<UAVDataObject*>(objManager->getObject(QString("ActuatorCommand")));
    UAVObject::Metadata mdata = obj->getMetadata();
    if (state)
    {
        accInitialData = mdata;
        mdata.flightAccess = UAVObject::ACCESS_READONLY;
        mdata.flightTelemetryUpdateMode = UAVObject::UPDATEMODE_ONCHANGE;
        mdata.gcsTelemetryAcked = false;
        mdata.gcsTelemetryUpdateMode = UAVObject::UPDATEMODE_ONCHANGE;
        mdata.gcsTelemetryUpdatePeriod = 100;
    }
    else
    {
        mdata = accInitialData; // Restore metadata
    }
    obj->setMetadata(mdata);

}

/**
  * Set the dropdown option for a channel output assignement
  */
void ConfigOutputWidget::assignOutputChannel(UAVDataObject *obj, QString str)
{
    UAVObjectField* field = obj->getField(str);
    QStringList options = field->getOptions();
    switch (options.indexOf(field->getValue().toString())) {
    case 0:
        m_config->ch0Output->setCurrentIndex(m_config->ch0Output->findText(str));
        break;
    case 1:
        m_config->ch1Output->setCurrentIndex(m_config->ch1Output->findText(str));
        break;
    case 2:
        m_config->ch2Output->setCurrentIndex(m_config->ch2Output->findText(str));
        break;
    case 3:
        m_config->ch3Output->setCurrentIndex(m_config->ch3Output->findText(str));
        break;
    case 4:
        m_config->ch4Output->setCurrentIndex(m_config->ch4Output->findText(str));
        break;
    case 5:
        m_config->ch5Output->setCurrentIndex(m_config->ch5Output->findText(str));
        break;
    case 6:
        m_config->ch6Output->setCurrentIndex(m_config->ch6Output->findText(str));
        break;
    case 7:
        m_config->ch7Output->setCurrentIndex(m_config->ch7Output->findText(str));
        break;
    }
}



/**
  Sends the channel value to the UAV to move the servo.
  Returns immediately if we are not in testing mode
  */
void ConfigOutputWidget::sendChannelTest(int value)
{
    // First of all, update the label:
    QSlider *ob = (QSlider*)QObject::sender();
    int index = outSliders.indexOf(ob);
    if (reversals[index]->isChecked())
        value = outMin[index]->value()-value+outMax[index]->value();
    else
        outLabels[index]->setText(QString::number(value));

    outLabels[index]->setText(QString::number(value));
    if (!m_config->channelOutTest->isChecked())
        return;

    UAVDataObject* obj = dynamic_cast<UAVDataObject*>(getObjectManager()->getObject(QString("ActuatorCommand")));

    UAVObjectField * channel = obj->getField("Channel");
    channel->setValue(value,index);
    obj->updated();

}



/********************************
  *  Output settings
  *******************************/

/**
  Request the current config from the board (RC Output)
  */
void ConfigOutputWidget::requestRCOutputUpdate()
{
    ExtensionSystem::PluginManager *pm = ExtensionSystem::PluginManager::instance();
    UAVObjectManager *objManager = pm->getObject<UAVObjectManager>();

    // Get the Airframe type from the system settings:
    UAVDataObject* obj = dynamic_cast<UAVDataObject*>(objManager->getObject(QString("SystemSettings")));
    Q_ASSERT(obj);
    obj->requestUpdate();
    UAVObjectField *field = obj->getField(QString("AirframeType"));
    m_config->aircraftType->setText(QString("Aircraft type: ") + field->getValue().toString());

    // Reset all channel assignements:
    m_config->ch0Output->setCurrentIndex(0);
    m_config->ch1Output->setCurrentIndex(0);
    m_config->ch2Output->setCurrentIndex(0);
    m_config->ch3Output->setCurrentIndex(0);
    m_config->ch4Output->setCurrentIndex(0);
    m_config->ch5Output->setCurrentIndex(0);
    m_config->ch6Output->setCurrentIndex(0);
    m_config->ch7Output->setCurrentIndex(0);

    // Get the channel assignements:
    obj = dynamic_cast<UAVDataObject*>(objManager->getObject(QString("ActuatorSettings")));
    Q_ASSERT(obj);
    obj->requestUpdate();
    QList<UAVObjectField*> fieldList = obj->getFields();
    foreach (UAVObjectField* field, fieldList) {
        if (field->getUnits().contains("channel")) {
            assignOutputChannel(obj,field->getName());
        }
    }

    // Get Output rates for both banks
    field = obj->getField(QString("ChannelUpdateFreq"));
    m_config->outputRate1->setValue(field->getValue(0).toInt());
    m_config->outputRate2->setValue(field->getValue(1).toInt());

    // Get Channel ranges:
    for (int i=0;i<8;i++) {
        field = obj->getField(QString("ChannelMin"));
        int minValue = field->getValue(i).toInt();
        outMin[i]->setValue(minValue);
        field = obj->getField(QString("ChannelMax"));
        int maxValue = field->getValue(i).toInt();
        outMax[i]->setValue(maxValue);
        if (maxValue>minValue) {
            outSliders[i]->setMinimum(minValue);
            outSliders[i]->setMaximum(maxValue);
            reversals[i]->setChecked(false);
        } else {
            outSliders[i]->setMinimum(maxValue);
            outSliders[i]->setMaximum(minValue);
            reversals[i]->setChecked(true);
        }
    }

    field = obj->getField(QString("ChannelNeutral"));
    for (int i=0; i<8; i++) {
        int value = field->getValue(i).toInt();
        outSliders[i]->setValue(value);
        outLabels[i]->setText(QString::number(value));
    }


}

/**
  * Sends the config to the board, without saving to the SD card (RC Output)
  */
void ConfigOutputWidget::sendRCOutputUpdate()
{
    ExtensionSystem::PluginManager *pm = ExtensionSystem::PluginManager::instance();
    UAVObjectManager *objManager = pm->getObject<UAVObjectManager>();
    UAVDataObject* obj = dynamic_cast<UAVDataObject*>(objManager->getObject(QString("ActuatorSettings")));
    Q_ASSERT(obj);

    // Now send channel ranges:
    UAVObjectField * field = obj->getField(QString("ChannelMax"));
    for (int i = 0; i < 8; i++) {
        field->setValue(outMax[i]->value(),i);
    }

    field = obj->getField(QString("ChannelMin"));
    for (int i = 0; i < 8; i++) {
        field->setValue(outMin[i]->value(),i);
    }

    field = obj->getField(QString("ChannelNeutral"));
    for (int i = 0; i < 8; i++) {
        field->setValue(outSliders[i]->value(),i);
    }

    field = obj->getField(QString("ChannelUpdateFreq"));
    field->setValue(m_config->outputRate1->value(),0);
    field->setValue(m_config->outputRate2->value(),1);

    // Set Actuator assignement for each channel:
    // Rule: if two channels have the same setting (which is wrong!) the higher channel
    // will get the setting.

    // First, reset all channel assignements:
    QList<UAVObjectField*> fieldList = obj->getFields();
    foreach (UAVObjectField* field, fieldList) {
        // NOTE: we assume that all options in ActuatorSettings are a channel assignement
        // except for the options called "ChannelXXX"
        if (field->getUnits().contains("channel")) {
            field->setValue(field->getOptions().last());
        }
    }

    if (m_config->ch0Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch0Output->currentText());
        field->setValue(field->getOptions().at(0)); // -> This way we don't depend on channel naming convention
    }
    if (m_config->ch1Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch1Output->currentText());
        field->setValue(field->getOptions().at(1)); // -> This way we don't depend on channel naming convention
    }
    if (m_config->ch2Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch2Output->currentText());
        field->setValue(field->getOptions().at(2)); // -> This way we don't depend on channel naming convention
    }
    if (m_config->ch3Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch3Output->currentText());
        field->setValue(field->getOptions().at(3)); // -> This way we don't depend on channel naming convention
    }
    if (m_config->ch4Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch4Output->currentText());
        field->setValue(field->getOptions().at(4)); // -> This way we don't depend on channel naming convention
    }
    if (m_config->ch5Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch5Output->currentText());
        field->setValue(field->getOptions().at(5)); // -> This way we don't depend on channel naming convention
    }
    if (m_config->ch6Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch6Output->currentText());
        field->setValue(field->getOptions().at(6)); // -> This way we don't depend on channel naming convention
    }
    if (m_config->ch7Output->currentIndex() != 0) {
        field = obj->getField(m_config->ch7Output->currentText());
        field->setValue(field->getOptions().at(7)); // -> This way we don't depend on channel naming convention
    }

    // ... and send to the OP Board
    obj->updated();


}


/**
  Sends the config to the board and request saving into the SD card (RC Output)
  */
void ConfigOutputWidget::saveRCOutputObject()
{
    // Send update so that the latest value is saved
    sendRCOutputUpdate();
    ExtensionSystem::PluginManager *pm = ExtensionSystem::PluginManager::instance();
    UAVObjectManager *objManager = pm->getObject<UAVObjectManager>();
    UAVDataObject* obj = dynamic_cast<UAVDataObject*>(objManager->getObject(QString("ActuatorSettings")));
    Q_ASSERT(obj);
    updateObjectPersistance(ObjectPersistence::OPERATION_SAVE, obj);

}


/**
  Sets the minimum/maximum value of the channel 0 to seven output sliders.
  Have to do it here because setMinimum is not a slot.

  One added trick: if the slider is at either its max or its min when the value
  is changed, then keep it on the max/min.
  */
void ConfigOutputWidget::setChOutRange()
{
    QSpinBox *spinbox = (QSpinBox*)QObject::sender();

    int index = outMin.indexOf(spinbox); // This is the channel number
    if (index < 0)
        index = outMax.indexOf(spinbox); // We can't know if the signal came from min or max

    QSlider *slider = outSliders[index];

    int oldMini = slider->minimum();
    int oldMaxi = slider->maximum();

    if (outMin[index]->value()<outMax[index]->value())
    {
        slider->setRange(outMin[index]->value(), outMax[index]->value());
        reversals[index]->setChecked(false);
    }
    else
    {
        slider->setRange(outMax[index]->value(), outMin[index]->value());
        reversals[index]->setChecked(true);
    }

    if (slider->value() == oldMini)
        slider->setValue(slider->minimum());

//    if (slider->value() == oldMaxi)
//        slider->setValue(slider->maximum());  // this can be dangerous if it happens to be controlling a motor at the time!
}

/**
  Reverses the channel when the checkbox is clicked
  */
void ConfigOutputWidget::reverseChannel(bool state)
{
    QCheckBox *checkbox = (QCheckBox*)QObject::sender();
    int index = reversals.indexOf(checkbox); // This is the channel number

    // Sanity check: if state became true, make sure the Maxvalue was higher than Minvalue
    // the situations below can happen!
    if (state && (outMax[index]->value()<outMin[index]->value()))
        return;
    if (!state && (outMax[index]->value()>outMin[index]->value()))
        return;

    // Now, swap the min & max values (only on the spinboxes, the slider
    // does not change!
    int temp = outMax[index]->value();
    outMax[index]->setValue(outMin[index]->value());
    outMin[index]->setValue(temp);

    // Also update the channel value
    // This is a trick to force the slider to update its value and
    // emit the right signal itself, because our sendChannelTest(int) method
    // relies on the object sender's identity.
    if (outSliders[index]->value()<outSliders[index]->maximum()) {
        outSliders[index]->setValue(outSliders[index]->value()+1);
        outSliders[index]->setValue(outSliders[index]->value()-1);
    } else {
        outSliders[index]->setValue(outSliders[index]->value()-1);
        outSliders[index]->setValue(outSliders[index]->value()+1);
    }

}