/*=====================================================================
 
 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/>.
 
 ======================================================================*/

/// @file
///     @author Don Gagne <don@thegagnes.com>

#ifndef AUTOPILOTPLUGIN_H
#define AUTOPILOTPLUGIN_H

#include <QObject>
#include <QList>
#include <QString>
#include <QQmlContext>

#include "VehicleComponent.h"
#include "FactSystem.h"
#include "Vehicle.h"

class ParameterLoader;
class Vehicle;

/// This is the base class for AutoPilot plugins
///
/// The AutoPilotPlugin class is an abstract base class which represent the methods and objects
/// which are specific to a certain AutoPilot. This is the only place where AutoPilot specific
/// code should reside in QGroundControl. The remainder of the QGroundControl source is
/// generic to a common mavlink implementation.

class AutoPilotPlugin : public QObject
{
    Q_OBJECT

public:
    AutoPilotPlugin(Vehicle* vehicle, QObject* parent);
    ~AutoPilotPlugin();
    
	/// true: plugin is ready for use, plugin should no longer be used
	Q_PROPERTY(bool pluginReady READ pluginReady NOTIFY pluginReadyChanged)
	
    /// List of VehicleComponent objects
    Q_PROPERTY(QVariantList vehicleComponents READ vehicleComponents CONSTANT)

	/// false: One or more vehicle components require setup
	Q_PROPERTY(bool setupComplete READ setupComplete NOTIFY setupCompleteChanged)
    
    Q_PROPERTY(bool armed READ armed NOTIFY armedChanged)
    
    /// Reset all parameters to their default values
    Q_INVOKABLE void resetAllParametersToDefaults(void);
	
    /// Re-request the full set of parameters from the autopilot
	Q_INVOKABLE void refreshAllParameters(void);
    
    /// Request a refresh on the specific parameter
	Q_INVOKABLE void refreshParameter(int componentId, const QString& name);
    
    /// Request a refresh on all parameters that begin with the specified prefix
	Q_INVOKABLE void refreshParametersPrefix(int componentId, const QString& namePrefix);
    
	/// Returns true if the specifed parameter exists from the default component
    Q_INVOKABLE bool parameterExists(int componentId, const QString& name);
	
	/// Returns all parameter names
	QStringList parameterNames(int componentId);
	
	/// Returns the specified parameter Fact from the default component
	/// WARNING: Returns a default Fact if parameter does not exists. If that possibility exists, check for existince first with
	/// parameterExists.
    Fact* getParameterFact(int componentId, const QString& name);
	
	/// Writes the parameter facts to the specified stream
	void writeParametersToStream(QTextStream &stream);
	
	/// Reads the parameters from the stream and updates values
    /// @return Errors during load. Empty string for no errors
	QString readParametersFromStream(QTextStream &stream);
	
    /// Returns true if the specifed fact exists
    Q_INVOKABLE bool factExists(FactSystem::Provider_t  provider,       ///< fact provider
                                int                     componentId,    ///< fact component, -1=default component
                                const QString&          name);          ///< fact name
    
    /// Returns the specified Fact.
    /// WARNING: Will assert if fact does not exists. If that possibility exists, check for existince first with
    /// factExists.
    Fact* getFact(FactSystem::Provider_t    provider,       ///< fact provider
                  int                       componentId,    ///< fact component, -1=default component
                  const QString&            name);          ///< fact name
    
    const QMap<int, QMap<QString, QStringList> >& getGroupMap(void);

    // Must be implemented by derived class
    virtual const QVariantList& vehicleComponents(void) = 0;
    
    static void clearStaticData(void);
	
	// Property accessors
	bool pluginReady(void) { return _pluginReady; }
	bool setupComplete(void);
    bool armed(void);
	
    Vehicle* vehicle(void) { return _vehicle; }
    
signals:
    void pluginReadyChanged(bool pluginReady);
	void setupCompleteChanged(bool setupComplete);
    void parameterListProgress(float value);
    void armedChanged(bool armed);
	
protected:
    /// All access to AutoPilotPugin objects is through getInstanceForAutoPilotPlugin
    AutoPilotPlugin(QObject* parent = NULL) : QObject(parent) { }
    
	/// Returns the ParameterLoader
	virtual ParameterLoader* _getParameterLoader(void) = 0;
	
    Vehicle*    _vehicle;
    bool        _pluginReady;
	bool		_setupComplete;
	
private slots:
	void _uasDisconnected(void);
	void _pluginReadyChanged(bool pluginReady);
	
private:
	void _recalcSetupComplete(void);
};

#endif