/*
 *  The Mana Server
 *  Copyright (C) 2006-2010  The Mana World Development Team
 *  Copyright (C) 2012  The Mana Developers
 *
 *  This file is part of The Mana Server.
 *
 *  The Mana Server 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
 *  any later version.
 *
 *  The Mana Server 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 The Mana Server.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TRIGGERAREACOMPONENT_H
#define TRIGGERAREACOMPONENT_H

#include "game-server/entity.h"
#include "scripting/script.h"
#include "utils/point.h"

#include <set>

class Entity;

class TriggerAction
{
    public:
        virtual ~TriggerAction() {}
        virtual void process(Entity *obj) = 0;
};

class WarpAction : public TriggerAction
{
    public:
        WarpAction(MapComposite *m, const Point &point)
          : mMap(m), mTargetPoint(point) {}

        virtual void process(Entity *obj);

    private:
        MapComposite *mMap;
        Point mTargetPoint;
};

class AutowarpAction: public TriggerAction
{
    public:
        enum ExitDirection {
            ExitNorth,
            ExitEast,
            ExitSouth,
            ExitWest
        };

        AutowarpAction(MapComposite *m,
                       const Rectangle &sourceArea,
                       const Rectangle &targetArea,
                       ExitDirection direction)
            : mMap(m),
              mSourceArea(sourceArea),
              mTargetArea(targetArea),
              mDirection(direction)
        {}

        virtual void process(Entity *obj);

    private:
        /** Target map */
        MapComposite *mMap;
        /** Source area - used to calculate warp offset and warp direction */
        Rectangle mSourceArea;
        /** Target area */
        Rectangle mTargetArea;
        /** The direction to exit target area */
        ExitDirection mDirection;
};

class ScriptAction : public TriggerAction
{
    public:
        ScriptAction(Script *script, Script::Ref callback, int arg);

        virtual void process(Entity *obj);

    private:
        Script *mScript;        // Script object to be called
        Script::Ref mCallback;  // Reference to the function to call
        int mArg;               // Argument passed to script function (meaning is function-specific)
};

class TriggerAreaComponent : public Component
{
    public:
        static const ComponentType type = CT_TriggerArea;

        /**
         * Creates a rectangular trigger for a given map.
         */
        TriggerAreaComponent(const Rectangle &r,
                             TriggerAction *ptr,
                             bool once) :
            mZone(r),
            mAction(ptr),
            mOnce(once)
        {}

        void update(Entity &entity);

    private:
        Rectangle mZone;
        TriggerAction *mAction;
        bool mOnce;
        std::set<Entity *> mInside;
};

#endif // TRIGGERAREACOMPONENT_H