/*=====================================================================
 
 QGroundControl Open Source Ground Control Station
 
 (c) 2009 - 2014 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
 
 This file is part of the QGROUNDCONTROL project
 
 QGROUNDCONTROL 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.
 
 QGROUNDCONTROL 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 QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
 
 ======================================================================*/

#ifndef SimpleMissionItem_H
#define SimpleMissionItem_H

#include "VisualMissionItem.h"
#include "MissionItem.h"

/// A SimpleMissionItem is used to represent a single MissionItem to the ui.
class SimpleMissionItem : public VisualMissionItem
{
    Q_OBJECT
    
public:
    SimpleMissionItem(Vehicle* vehicle, QObject* parent = NULL);
    SimpleMissionItem(Vehicle* vehicle, const MissionItem& missionItem, QObject* parent = NULL);
    SimpleMissionItem(const SimpleMissionItem& other, QObject* parent = NULL);

    ~SimpleMissionItem();

    const SimpleMissionItem& operator=(const SimpleMissionItem& other);
    
    Q_PROPERTY(QString          category                READ category                                           NOTIFY commandChanged)
    Q_PROPERTY(MavlinkQmlSingleton::Qml_MAV_CMD command READ command                WRITE setCommand            NOTIFY commandChanged)
    Q_PROPERTY(bool             friendlyEditAllowed     READ friendlyEditAllowed                                NOTIFY friendlyEditAllowedChanged)
    Q_PROPERTY(bool             homePosition            READ homePosition                                       CONSTANT)                           ///< true: This item is being used as a home position indicator
    Q_PROPERTY(bool             rawEdit                 READ rawEdit                WRITE setRawEdit            NOTIFY rawEditChanged)              ///< true: raw item editing with all params
    Q_PROPERTY(bool             relativeAltitude        READ relativeAltitude                                   NOTIFY frameChanged)
    Q_PROPERTY(bool             showHomePosition        READ showHomePosition       WRITE setShowHomePosition   NOTIFY showHomePositionChanged)

    // These properties are used to display the editing ui
    Q_PROPERTY(QmlObjectListModel*  checkboxFacts   READ checkboxFacts  NOTIFY uiModelChanged)
    Q_PROPERTY(QmlObjectListModel*  comboboxFacts   READ comboboxFacts  NOTIFY uiModelChanged)
    Q_PROPERTY(QmlObjectListModel*  textFieldFacts  READ textFieldFacts NOTIFY uiModelChanged)

    // Property accesors
    
    QString         category            (void) const;
    MavlinkQmlSingleton::Qml_MAV_CMD command(void) const { return (MavlinkQmlSingleton::Qml_MAV_CMD)_missionItem._commandFact.cookedValue().toInt(); };
    bool            friendlyEditAllowed (void) const;
    bool            homePosition        (void) const    { return _homePositionSpecialCase; }
    bool            rawEdit             (void) const;
    bool            showHomePosition    (void) const    { return _showHomePosition; }


    QmlObjectListModel* textFieldFacts  (void);
    QmlObjectListModel* checkboxFacts   (void);
    QmlObjectListModel* comboboxFacts   (void);

    void setRawEdit(bool rawEdit);
    
    void setCommandByIndex(int index);

    void setCommand(MavlinkQmlSingleton::Qml_MAV_CMD command);

    void setHomePositionSpecialCase(bool homePositionSpecialCase) { _homePositionSpecialCase = homePositionSpecialCase; }
    void setShowHomePosition(bool showHomePosition);

    void setAltDifference   (double altDifference);
    void setAltPercent      (double altPercent);
    void setAzimuth         (double azimuth);
    void setDistance        (double distance);

    bool load(QTextStream &loadStream);
    bool load(const QJsonObject& json, QString& errorString);

    bool relativeAltitude(void) { return _missionItem.frame() == MAV_FRAME_GLOBAL_RELATIVE_ALT; }

    static const double defaultAltitude;

    MissionItem& missionItem(void) { return _missionItem; }

    // Overrides from VisualMissionItem

    bool            dirty                   (void) const final { return _dirty; }
    bool            isSimpleItem            (void) const final { return true; }
    bool            isStandaloneCoordinate  (void) const final;
    bool            specifiesCoordinate     (void) const final;
    QString         commandDescription      (void) const final;
    QString         commandName             (void) const final;
    QString         abbreviation            (void) const final;
    QGeoCoordinate  coordinate              (void) const final { return _missionItem.coordinate(); }
    QGeoCoordinate  exitCoordinate          (void) const final { return coordinate(); }
    int             sequenceNumber          (void) const final { return _missionItem.sequenceNumber(); }

    bool coordinateHasRelativeAltitude      (void) const final { return _missionItem.relativeAltitude(); }
    bool exitCoordinateHasRelativeAltitude  (void) const final { return coordinateHasRelativeAltitude(); }
    bool exitCoordinateSameAsEntry          (void) const final { return true; }

    void setDirty           (bool dirty) final;
    void setCoordinate      (const QGeoCoordinate& coordinate) final;
    void setSequenceNumber  (int sequenceNumber) final;
    void save               (QJsonObject& saveObject) const final;

public slots:
    void setDefaultsForCommand(void);

signals:
    void commandChanged             (int command);
    void frameChanged               (int frame);
    void friendlyEditAllowedChanged (bool friendlyEditAllowed);
    void headingDegreesChanged      (double heading);
    void rawEditChanged             (bool rawEdit);
    void uiModelChanged             (void);
    void showHomePositionChanged    (bool showHomePosition);

private slots:
    void _setDirtyFromSignal(void);
    void _sendCommandChanged(void);
    void _sendCoordinateChanged(void);
    void _sendFrameChanged(void);
    void _sendFriendlyEditAllowedChanged(void);
    void _sendUiModelChanged(void);
    void _syncAltitudeRelativeToHomeToFrame(const QVariant& value);
    void _syncFrameToAltitudeRelativeToHome(void);

private:
    void _clearParamMetaData(void);
    void _connectSignals(void);
    void _setupMetaData(void);

private:
    MissionItem _missionItem;
    bool        _rawEdit;
    bool        _dirty;
    bool        _homePositionSpecialCase;   ///< true: This item is being used as a ui home position indicator
    bool        _showHomePosition;

    Fact    _altitudeRelativeToHomeFact;
    Fact    _supportedCommandFact;
    
    static FactMetaData*    _altitudeMetaData;
    static FactMetaData*    _commandMetaData;
    static FactMetaData*    _defaultParamMetaData;
    static FactMetaData*    _frameMetaData;
    static FactMetaData*    _latitudeMetaData;
    static FactMetaData*    _longitudeMetaData;

    FactMetaData    _param1MetaData;
    FactMetaData    _param2MetaData;
    FactMetaData    _param3MetaData;
    FactMetaData    _param4MetaData;
    FactMetaData    _param5MetaData;
    FactMetaData    _param6MetaData;
    FactMetaData    _param7MetaData;

    bool _syncingAltitudeRelativeToHomeAndFrame;    ///< true: already in a sync signal, prevents signal loop
    bool _syncingHeadingDegreesAndParam4;           ///< true: already in a sync signal, prevents signal loop

    const MissionCommands*  _missionCommands;
};

#endif
