/*
 *   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:
 *      Damian 'Mozork' Frick
 *   Co-authors:
 *      ...
 *
 */
 
/**
    @file GlobalQuest.cc
    @brief
	Implementation of the GlobalQuest class.
*/

#include "OrxonoxStableHeaders.h"
#include "GlobalQuest.h"

#include "orxonox/objects/worldentities/ControllableEntity.h"
#include "core/CoreIncludes.h"
#include "util/Exception.h"

#include "QuestEffect.h"

namespace orxonox {

    CreateFactory(GlobalQuest);

    /**
    @brief
        Constructor. Registers the object.
    */
    GlobalQuest::GlobalQuest(BaseObject* creator) : Quest(creator)
    {
        RegisterObject(GlobalQuest);
    }

    /**
    @brief
        Destructor.
    */
    GlobalQuest::~GlobalQuest()
    {

    }
    
    /**
    @brief
        Method for creating a GlobalQuest object through XML.
    */
    void GlobalQuest::XMLPort(Element& xmlelement, XMLPort::Mode mode)
    {
        SUPER(GlobalQuest, XMLPort, xmlelement, mode);
        
        XMLPortObject(GlobalQuest, QuestEffect, "reward-effects", addRewardEffect, getRewardEffects, xmlelement, mode);

        COUT(3) << "New GlobalQuest {" << this->getId() << "} created." << std::endl;
    }
    
    /**
    @brief
        Fails the quest for all players.
        Invokes the failEffects on all the players possessing this quest.
    @param player
        The player failing it.
    @return
        Returns true if the quest could be failed, false if not.
    */
    bool GlobalQuest::fail(ControllableEntity* player)
    {
        if(this->isFailable(player)) //!< Check whether the quest can be failed.
        {
            this->setStatus(player, questStatus::failed);
            
            //! Iterate through all players possessing this quest.
            for(std::set<ControllableEntity*>::const_iterator it = players_.begin(); it != players_.end(); it++)
            {
                QuestEffect::invokeEffects(*it, this->getFailEffectList());
            }

            return true;
        }
        
        COUT(2) << "A non-completable quest was trying to be failed." << std::endl;
        return false;
    }

    /**
    @brief
        Completes the quest for all players.
        Invokes the completeEffects on all the players possessing this quest.
        Invokes the reward effects on the player completing the quest.
    @param player
        The player completing it.
    @return
        Returns true if the quest could be completed, false if not.
    */
    bool GlobalQuest::complete(ControllableEntity* player)
    {
        if(this->isCompletable(player)) //!< Check whether the quest can be completed.
        {
            this->setStatus(player, questStatus::completed);
            
            //! Iterate through all players possessing the quest.
            for(std::set<ControllableEntity*>::const_iterator it = players_.begin(); it != players_.end(); it++)
            {
                QuestEffect::invokeEffects(*it, this->getCompleteEffectList());
            }
            
            QuestEffect::invokeEffects(player, this->rewards_); //!< Invoke reward effects on the player completing the quest.
            return true;
        }
        
        COUT(2) << "A non-completable quest was trying to be completed." << std::endl;
        return false;
    }

    /**
    @brief
        Checks whether the quest can be started.
    @param player
        The player for whom is to be checked.
    @return
        Returns true if the quest can be started, false if not.
    @throws
        Throws an exception if either isInactive() of isActive() throws one.
    */
    bool GlobalQuest::isStartable(const ControllableEntity* player) const
    {
        return this->isInactive(player) ||  this->isActive(player);
    }

    /**
    @brief
        Checks whether the quest can be failed.
    @param player
        The player for whom is to be checked.
    @return
        Returns true if the quest can be failed, false if not.
    @throws
        Throws an Exception if isActive() throws one.
    */
    bool GlobalQuest::isFailable(const ControllableEntity* player) const
    {
        return this->isActive(player);

    }

    /**
    @brief
        Checks whether the quest can be completed.
    @param player
        The player for whom is to be checked.
    @return
        Returns true if the quest can be completed, false if not.
    @throws
        Throws an Exception if isActive() throws one.
    */
    bool GlobalQuest::isCompletable(const ControllableEntity* player) const
    {
        return this->isActive(player);
    }

    /**
    @brief
        Returns the status of the quest for a specific player.
    @param player
        The player.
    @throws
        Throws an Exception if player is NULL.
    */
    questStatus::Enum GlobalQuest::getStatus(const ControllableEntity* player) const
    {
        if(player == NULL) //!< We don't want NULL-Pointers!
        {
            ThrowException(Argument, "The input ControllableEntity* is NULL.");
        }

        //! Find the player.
        std::set<ControllableEntity*>::const_iterator it = this->players_.find((ControllableEntity*)(void*)player);
        if (it != this->players_.end()) //!< If the player was found.
        {
            return this->status_;
        }

	return questStatus::inactive;
    }

    /**
    @brief
        Sets the status for a specific player.
        But be careful wit this one, the status will just be set without checking for its validity. You have to know what you're doing.
    @param player
        The player.
    @param status
        The status to be set.
    @return
        Returns false if player is NULL.
    */
    bool GlobalQuest::setStatus(ControllableEntity* player, const questStatus::Enum & status)
    {
        if(player == NULL) //!< We don't want NULL-Pointers!
        {
            return false;
        }

        //! Find the player.
        std::set<ControllableEntity*>::const_iterator it = this->players_.find(player);
        if (it == this->players_.end()) //!< Player is not yet in the list.
        {
            this->players_.insert(player); //!< Add the player to the set.
        }
        
        this->status_ = status; //!< Set the status, which is global, remember...?
        return true;
    }
    
    /**
    @brief
        Adds a reward effect to the list of reward effects.
    @param effect
        The effect to be added.
    @return
        Returns true if successful.
    */
    bool GlobalQuest::addRewardEffect(QuestEffect* effect)
    {
        if(effect == NULL) //!< We don't want NULL-Pointers!
        {
            COUT(2) << "The reward effect to be added to quest {" << this->getId() << "} was NULL." << std::endl;
            return false;
        }

        this->rewards_.push_back(effect); //!< Add the effect to the list.

        COUT(3) << "Reward effect was added to Quest {" << this->getId() << "}." << std::endl;
        return true;
    }
    
    /**
    @brief
        Returns the reward effect at the given index.
    @param index
        The index.
    @return
        Returns the QuestEffect at the given index.
    */
    const QuestEffect* GlobalQuest::getRewardEffects(unsigned int index) const
    {
        int i = index;
        for (std::list<QuestEffect*>::const_iterator effect = this->rewards_.begin(); effect != this->rewards_.end(); ++effect)
        {
            if(i == 0)
            {
               return *effect;
            }
            i--;
        }
        return NULL;
    }


}