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/*
    Guider Interface
    Copyright (C) 2011 Jasem Mutlaq (mutlaqja@ikarustech.com)

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

*/

#ifndef GUIDERINTERFACE_H
#define GUIDERINTERFACE_H

#include "indibase.h"

/**
 * \class INDI::GuiderInterface
   \brief Provides interface to implement guider (ST4) port functionality.

   The child class implements GuideXXXX() functions and returns:
   * IPS_OK if the guide operation is completed in the function, which is usually appropiate for very short guiding pulses.
   * IPS_BUSY if the guide operation is in progress and will take time to complete. In this case, the child class must call GuideComplete() once the guiding pulse is complete.
   * IPS_ALERT if the guide operation failed.

   \e IMPORTANT: initGuiderProperties() must be called before any other function to initilize the guider properties.

   \e IMPORATNT: processGuiderProperties() must be called in your driver's ISNewNumber(..) function. processGuiderProperties() will call the guide functions
              GuideXXXX functions accordingly to the driver.

\author Jasem Mutlaq
*/
class INDI::GuiderInterface
{

public:

    /** \brief Guide north for ms milliseconds
        \return IPS_OK if operation is completed successfully, IPS_BUSY if operation will take take to complete, or IPS_ALERT if operation failed.
    */
    virtual IPState GuideNorth(float ms) = 0;

    /** \brief Guide south for ms milliseconds
        \return IPS_OK if operation is completed successfully, IPS_BUSY if operation will take take to complete, or IPS_ALERT if operation failed.
    */
    virtual IPState GuideSouth(float ms) = 0;

    /** \brief Guide east for ms milliseconds
        \return IPS_OK if operation is completed successfully, IPS_BUSY if operation will take take to complete, or IPS_ALERT if operation failed.
    */
    virtual IPState GuideEast(float ms) = 0;

    /** \brief Guide west for ms milliseconds
        \return IPS_OK if operation is completed successfully, IPS_BUSY if operation will take take to complete, or IPS_ALERT if operation failed.
    */
    virtual IPState GuideWest(float ms) = 0;

    /**
     * \brief Call GuideComplete once the guiding pulse is complete.
     * @param axis Axis of completed guiding operation.
     */
    virtual void GuideComplete(INDI_EQ_AXIS axis);

protected:

    GuiderInterface();
    ~GuiderInterface();

    /** \brief Initilize guider properties. It is recommended to call this function within initProperties() of your primary device
        \param deviceName Name of the primary device
        \param groupName Group or tab name to be used to define guider properties.
    */
    void initGuiderProperties(const char *deviceName, const char* groupName);

    /** \brief Call this function whenever client updates GuideNSNP or GuideWSP properties in the primary device. This function then takes care of issuing the corresponding
     * GuideXXXX function accordingly.
     * \param name device name
     * \param values value as passed by the client
     * \param names names as passed by the client
     * \param n number of values and names pair to process.
    */
    void processGuiderProperties(const char *name, double values[], char *names[], int n);

    INumber GuideNSN[2];
    INumberVectorProperty GuideNSNP;
    INumber GuideWEN[2];
    INumberVectorProperty GuideWENP;
};

#endif // GUIDERINTERFACE_H