/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   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 2
 *   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Daniel 'Huty' Haggenmueller
 *   Co-authors:
 *      Damian 'Mozork' Frick
 *
 */

/**
    @file
    @brief Definition of PickupSpawner.
*/

#ifndef _PickupSpawner_H__
#define _PickupSpawner_H__

#include "PickupPrereqs.h"

#include <string>
#include "interfaces/Pickupable.h"
#include "tools/Timer.h"

#include "tools/interfaces/Tickable.h"
#include "worldentities/StaticEntity.h"

namespace orxonox
{
    /**
        @brief
            The PickupSpawner class is responsible for spawning pickups of a specific type.
            Forthermore it can be specified how long the time interval between spawning two items is and how many pickups are spawned at maximum, amongst other things.
        @author
            Daniel 'Huty' Haggenmueller
            Damian 'Mozork' Frick
    */
    class _OrxonoxExport PickupSpawner : public StaticEntity, public Tickable
    {
        public:
            PickupSpawner(BaseObject* creator); //!< Default Constructor.
            PickupSpawner(BaseObject* creator, Pickupable* pickup, float triggerDistance, float respawnTime, int maxSpawnedItems); //!< Constructor.
            virtual ~PickupSpawner(); //!< Destructor.

            virtual void XMLPort(Element& xmlelement, XMLPort::Mode mode);  //!< Method for creating a PickupSpawner through XML.
            virtual void changedActivity(); //!< Invoked when activity has changed (set visibilty).
            virtual void tick(float dt);

            /**
            @brief Get the distance in which to trigger.
            @return Returns the distance in which this gets triggered.
            */
            inline float getTriggerDistance() const
                { return this->triggerDistance_; }
            /**
            @brief Set the distance in which to trigger.
            @param value The new distance in which to trigger.
            */
            inline void setTriggerDistance(float value)
                { this->triggerDistance_ = value; }

            /**
            @brief Get the time to respawn.
            @returns Returns the time after which this gets re-actived.
            */
            inline float getRespawnTime() const
                { return this->respawnTime_; }
            /**
            @brief Set the time to respawn.
            @param time New time after which this gets re-actived.
            */
            inline void setRespawnTime(float time)
                { this->respawnTime_ = time; }

            /**
            @brief Get the maximum number of items that will be spawned by this PickupSpawner.
            @return Returns the maximum number of items spawned by this PickupSpawner.
            */
            inline int getMaxSpawnedItems(void)
                { return this->maxSpawnedItems_; }
            void setMaxSpawnedItems(int items); //!< Sets the maximum number of spawned items.

        protected:
            void decrementSpawnsRemaining(void); //!< Decrements the number of remaining spawns.
            
            virtual Pickupable* getPickup(void); //!< Creates a new Pickupable.
            
            void setPickupable(Pickupable* pickup); //!< Sets a Pickupable for the PickupSpawner to spawn.
            const Pickupable* getPickupable(void); //!< Get the Pickupable that is spawned by this PickupSpawner.
            
            Pickupable* pickup_; //!< The pickup to be spawned.

        private:
            void initialize(void);
            
            void trigger(Pawn* pawn); //!< Method called when a Pawn is close enough.
            void respawnTimerCallback(); //!< Method called when the timer runs out.

            int maxSpawnedItems_; //!< Maximum number of items spawned by this PickupSpawner.
            int spawnsRemaining_; //!< Number of items that can be spawned by this PickupSpawner until it selfdestructs.

            float triggerDistance_; //!< Distance in which this gets triggered.

            float respawnTime_; //!< Time after which this gets re-actived.
            Timer respawnTimer_; //!< Timer used for re-activating.

            static const int INF = -1; //!< Constant for infinity.
    };
}

#endif /* _PickupSpawner_H__ */