/****************************************************************************/
// Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.org/sumo
// Copyright (C) 2001-2019 German Aerospace Center (DLR) and others.
// This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v2.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v20.html
// SPDX-License-Identifier: EPL-2.0
/****************************************************************************/
/// @file    MSDetectorFileOutput.h
/// @author  Christian Roessel
/// @author  Daniel Krajzewicz
/// @author  Sascha Krieg
/// @author  Michael Behrisch
/// @date    2004-11-23
/// @version $Id$
///
// Base of value-generating classes (detectors)
/****************************************************************************/
#ifndef MSDetectorFileOutput_h
#define MSDetectorFileOutput_h


// ===========================================================================
// included modules
// ===========================================================================
#include <config.h>

#include <string>
#include <set>

#include <utils/common/Named.h>
#include <utils/common/SUMOTime.h>
#include <utils/common/StringTokenizer.h>
#include <utils/iodevices/OutputDevice.h>
#include <utils/vehicle/SUMOTrafficObject.h>
#include <microsim/MSVehicleType.h>
#include <microsim/MSVehicleControl.h>
#include <microsim/MSNet.h>


// ===========================================================================
// class declarations
// ===========================================================================
class GUIDetectorWrapper;


// ===========================================================================
// class definitions
// ===========================================================================
enum DetectorUsage {
    DU_USER_DEFINED,
    DU_SUMO_INTERNAL,
    DU_TL_CONTROL
};

/**
 * @class MSDetectorFileOutput
 * @brief Base of value-generating classes (detectors)
 *
 * Pure virtual base class for classes (e.g. MSInductLoop) that should produce
 *  XML-output.
 */
class MSDetectorFileOutput : public Named {
public:
    /// @brief Constructor
    MSDetectorFileOutput(const std::string& id, const std::string& vTypes, const int detectPersons = false) :
        Named(id),
        myDetectPersons(detectPersons) {
        const std::vector<std::string> vt = StringTokenizer(vTypes).getVector();
        myVehicleTypes.insert(vt.begin(), vt.end());
    }

    /// @brief Constructor
    MSDetectorFileOutput(const std::string& id, const std::set<std::string>& vTypes, const int detectPersons = false)
        : Named(id), myVehicleTypes(vTypes), myDetectPersons(detectPersons)
    { }


    /// @brief (virtual) destructor
    virtual ~MSDetectorFileOutput() { }


    /// @name Virtual methods to implement by derived classes
    /// @{

    /** @brief Write the generated output to the given device
     * @param[in] dev The output device to write the data into
     * @param[in] startTime First time step the data were gathered
     * @param[in] stopTime Last time step the data were gathered
     * @exception IOError If an error on writing occurs
     */
    virtual void writeXMLOutput(OutputDevice& dev,
                                SUMOTime startTime, SUMOTime stopTime) = 0;


    /** @brief Open the XML-output
     *
     * The implementing function should open an xml element using
     *  OutputDevice::writeXMLHeader.
     *
     * @param[in] dev The output device to write the root into
     * @exception IOError If an error on writing occurs
     */
    virtual void writeXMLDetectorProlog(OutputDevice& dev) const = 0;


    /** @brief Resets collected values
     *
     * Please note that this is only a "hack" for coupled-tls-outputs.
     *
     * @see Command_SaveTLCoupledLaneDet
     * @todo Reckeck/refactor
     */
    virtual void reset() { }


    /** @brief Updates the detector (computes values)
     *
     * @param[in] step The current time step
     */
    virtual void detectorUpdate(const SUMOTime step) {
        UNUSED_PARAMETER(step);
    }


    /** @brief Builds the graphical representation
     *
     * Meant to be overridden by graphical versions of the detectors
     * @return A wrapper for the detector which performs the user I/O within the GUI
     */
    virtual GUIDetectorWrapper* buildDetectorGUIRepresentation() {
        return 0;
    }


    /** @brief Checks whether the detector measures vehicles of the given type.
    *
    * @param[in] veh the vehicle of which the type is checked.
    * @return whether it should be measured
    */
    bool vehicleApplies(const SUMOTrafficObject& veh) const {
        if (veh.isVehicle() == detectPersons()) {
            return false;
        } else if (myVehicleTypes.empty() || myVehicleTypes.count(veh.getVehicleType().getID()) > 0) {
            return true;
        } else {
            std::set<std::string> vTypeDists = MSNet::getInstance()->getVehicleControl().getVTypeDistributionMembership(veh.getVehicleType().getID());
            for (auto vTypeDist : vTypeDists) {
                if (myVehicleTypes.count(vTypeDist) > 0) {
                    return true;
                }
            }
            return false;
        }
    }


    /** @brief Checks whether the detector is type specific.
    *
    * @return whether vehicle types are considered
    */
    bool isTyped() const {
        return !myVehicleTypes.empty();
    }

    inline bool detectPersons() const {
        return myDetectPersons != 0;
    }

protected:
    /// @brief The vehicle types to look for (empty means all)
    std::set<std::string> myVehicleTypes;

    /// @brief Whether pedestrians shall be detected instead of vehicles
    const int myDetectPersons;

private:
    /// @brief Invalidated copy constructor.
    MSDetectorFileOutput(const MSDetectorFileOutput&);

    /// @brief Invalidated assignment operator.
    MSDetectorFileOutput& operator=(const MSDetectorFileOutput&);


};


#endif

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