/*
 *   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:
 *      ...
 *   Co-authors:
 *      ...
 *
 */

#ifndef _Dialog_H__
#define _Dialog_H__

#include "core/BaseObject.h"
#include "DialogPrereqs.h"
#include "Question.h"
#include "Answer.h"
#include "core/XMLPort.h"
#include "core/CoreIncludes.h"
#include "overlays/OrxonoxOverlay.h"

#include <map>
#include <vector>
#include <string>

namespace orxonox
{
    /**
    @brief
    class containing core of one dialog with one npc

    this class contains a map of all answerids to answers (player text options) and one of all questionids to questions (npc text options)
    it realizes a state machine with the question beeing the states and the answers beeing the connections, it has a current state and
    can be commanded to go to the next state according to a given answer
    */

    class _DialogExport Dialog : public BaseObject
    {
        public:
            Dialog(Context* context);

            virtual void XMLPort(Element& xmlelement, XMLPort::Mode mode);
            virtual void XMLEventPort(Element& xmlelement, XMLPort::Mode mode);

            void setName(const std::string& name); //xmlPort-Funktion, sets Namen
            const std::string& getName() const; //xmlPort-Funktion, returns Namen

            void setCurrentQuestionId(const std::string& questionId); //xmlPort-Funktion, sets string id of current question
            const std::string& getCurrentQuestionId() const; //xmlPort-Funktion, returns id of current question

            void addQuestion(Question* question); //xmlPort-Funktion, adds question to map
            Question* getQuestion(unsigned int index) const; //xmlPort-Funktion

            void addAnswer(Answer* answer); //xmlPort-Funktion, adds answer to map
            Answer* getAnswer(unsigned int index) const; //xmlPort-Funktion

            /**
            @brief
                returns a pointer to the array of answers belonging to the current question for use in dialogManager

            @return
                pointer to answerId array of question
            */
            const std::vector<std::string>& getAnswerIds() const;

            /**
            @brief
                function called when the trigger object defined in the xml file sets to triggered

            @param bTriggered
                needs to be set like this for correctness
            @param trigger
                needs to be set like this for correctness
            @return
                not really used
            */
            bool execute(bool bTriggered, BaseObject* trigger);

            /**
            @brief
                updates the current Dialog according to the id of a given answer, by setting currentQuestionId to the next one

            @param givenAnswerId
                id of the answer given by player
            */
            void update(const std::string& givenAnswerId);

            /**
            @brief
                tests if there is a next question for the given answerId

            @param givenAnswerId
                id of the answer given by player
            @return
                true if there is no more Question to the given answerId
            */
            bool ending(const std::string& givenAnswerId);

            /**
            @brief
                gives the text of the npc in the current state

            @return
                sting with npc text
            */
            const std::string& getQuestionString();

            /**
            @brief
                returns a sting with the pc answer to the id

            @param answerId
                the id of the answer looked for
            @return
                sting with answer
            */
            const std::string& getAnswerString(const std::string& answerId);

        private:
            std::string name_; //!< name of the npc talking
            std::string currentQuestionId_; //!< id of the npc question currently active
            std::map<std::string, Question*> questions_; //!< a map form the ids of npc textoptions to the objects containing them
            std::map<std::string, Answer*> answers_; //!< a map form the ids of npc textoptions to the objects containing them
    };
}

#endif