/*

 *  The Mana World

 *  Copyright (C) 2004  The Mana World Development Team

 *

 *  This file is part of The Mana World.

 *

 *  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

 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#include "beingmanager.h"

#include "localplayer.h"

#include "monster.h"

#include "npc.h"

#include "player.h"

#ifdef TMWSERV_SUPPORT

#include "net/tmwserv/protocol.h"

#endif

#include "utils/dtor.h"

#include <cassert>

class FindBeingFunctor

{

    public:

        bool operator() (Being *being)

        {

            Uint16 other_y = y + ((being->getType() == Being::NPC) ? 1 : 0);

            const Vector &pos = being->getPosition();

            return ((int) pos.x / 32 == x &&

                    ((int) pos.y / 32 == y || (int) pos.y / 32 == other_y) &&

                    being->mAction != Being::DEAD &&

                    (type == Being::UNKNOWN || being->getType() == type));

        }

        Uint16 x, y;

        Being::Type type;

} beingFinder;

BeingManager::BeingManager()

{

}

BeingManager::~BeingManager()

{

    clear();

}

void BeingManager::setMap(Map *map)

{

    mMap = map;

    if (player_node)

        player_node->setMap(map);

}

void BeingManager::setPlayer(LocalPlayer *player)

{

    player_node = player;

    mBeings.push_back(player);

}

Being *BeingManager::createBeing(int id, Being::Type type, int subtype)

{

    Being *being;

    switch (type)

    {

        case Being::PLAYER:

            being = new Player(id, subtype, mMap);

            break;

        case Being::NPC:

            being = new NPC(id, subtype, mMap);

            break;

        case Being::MONSTER:

            being = new Monster(id, subtype, mMap);

            break;

        case Being::UNKNOWN:

            being = new Being(id, subtype, mMap);

            break;

        default:

            assert(false);

    }

    mBeings.push_back(being);

    return being;

}

void BeingManager::destroyBeing(Being *being)

{

    mBeings.remove(being);

    delete being;

}

Being *BeingManager::findBeing(int id) const

{

    for (Beings::const_iterator i = mBeings.begin(), i_end = mBeings.end();

         i != i_end; ++i)

    {

        Being *being = (*i);

        if (being->getId() == id)

            return being;

    }

    return NULL;

}

Being *BeingManager::findBeing(int x, int y, Being::Type type) const

{

    beingFinder.x = x;

    beingFinder.y = y;

    beingFinder.type = type;

    Beings::const_iterator i = find_if(mBeings.begin(), mBeings.end(),

                                       beingFinder);

    return (i == mBeings.end()) ? NULL : *i;

}

Being *BeingManager::findBeingByPixel(int x, int y) const

{

    Beings::const_iterator itr = mBeings.begin();

    Beings::const_iterator itr_end = mBeings.end();

    for (; itr != itr_end; ++itr)

    {

        Being *being = (*itr);

        int xtol = being->getWidth() / 2;

        int uptol = being->getHeight();

        if ((being->mAction != Being::DEAD) &&

            (being != player_node) &&

            (being->getPixelX() - xtol <= x) &&

            (being->getPixelX() + xtol >= x) &&

            (being->getPixelY() - uptol <= y) &&

            (being->getPixelY() >= y))

        {

            return being;

        }

    }

    return NULL;

}

Being *BeingManager::findBeingByName(const std::string &name,

                                     Being::Type type) const

{

    for (Beings::const_iterator i = mBeings.begin(), i_end = mBeings.end();

         i != i_end; ++i)

    {

        Being *being = (*i);

        if (being->getName() == name &&

           (type == Being::UNKNOWN || type == being->getType()))

            return being;

    }

    return NULL;

}

const Beings &BeingManager::getAll() const

{

    return mBeings;

}

void BeingManager::logic()

{

    Beings::iterator i = mBeings.begin();

    while (i != mBeings.end())

    {

        Being *being = (*i);

        being->logic();

#ifdef EATHENA_SUPPORT

        if (being->mAction == Being::DEAD && being->mFrame >= 20)

        {

            delete being;

            i = mBeings.erase(i);

        }

        else

#endif

        {

            ++i;

        }

    }

}

void BeingManager::clear()

{

    if (player_node)

        mBeings.remove(player_node);

    delete_all(mBeings);

    mBeings.clear();

    if (player_node)

        mBeings.push_back(player_node);

}

Being *BeingManager::findNearestLivingBeing(int x, int y, int maxdist,

                                            Being::Type type) const

{

    Being *closestBeing = NULL;

    int dist = 0;

#ifdef TMWSERV_SUPPORT

    //Why do we do this:

    //For some reason x,y passed to this function is always

    //in map coords, while down below its in pixels

    //

    //I believe there is a deeper problem under this, but

    //for a temp solution we'll convert to coords to pixels

    x = x * 32;

    y = y * 32;

    maxdist = maxdist * 32;

#endif

    Beings::const_iterator itr = mBeings.begin();

    Beings::const_iterator itr_end = mBeings.end();

    for (; itr != itr_end; ++itr)

    {

        Being *being = (*itr);

#ifdef TMWSERV_SUPPORT

        const Vector &pos = being->getPosition();

        int d = abs(((int) pos.x) - x) + abs(((int) pos.y) - y);

#else

        int d = abs(being->getTileX() - x) + abs(being->getTileY() - y);

#endif

        if ((being->getType() == type || type == Being::UNKNOWN)

                && (d < dist || closestBeing == NULL)   // it is closer

                && being->mAction != Being::DEAD)       // no dead beings

        {

            dist = d;

            closestBeing = being;

        }

    }

    return (maxdist >= dist) ? closestBeing : NULL;

}

Being *BeingManager::findNearestLivingBeing(Being *aroundBeing, int maxdist,

                                            Being::Type type) const

{

    Being *closestBeing = NULL;

    int dist = 0;

#ifdef TMWSERV_SUPPORT

    const Vector &apos = aroundBeing->getPosition();

    int x = apos.x;

    int y = apos.y;

    maxdist = maxdist * 32;

#else

    int x = aroundBeing->getTileX();

    int y = aroundBeing->getTileY();

#endif

    for (Beings::const_iterator i = mBeings.begin(), i_end = mBeings.end();

         i != i_end; ++i)

    {

        Being *being = (*i);

#ifdef TMWSERV_SUPPORT

        const Vector &pos = being->getPosition();

        int d = abs(((int) pos.x) - x) + abs(((int) pos.y) - y);

#else

        int d = abs(being->getTileX() - x) + abs(being->getTileY() - y);

#endif

        if ((being->getType() == type || type == Being::UNKNOWN)

                && (d < dist || closestBeing == NULL)   // it is closer

                && being->mAction != Being::DEAD        // no dead beings

                && being != aroundBeing)

        {

            dist = d;

            closestBeing = being;

        }

    }

    return (maxdist >= dist) ? closestBeing : NULL;

}

bool BeingManager::hasBeing(Being *being) const

{

    for (Beings::const_iterator i = mBeings.begin(), i_end = mBeings.end();

         i != i_end; ++i)

    {

        if (being == *i)

            return true;

    }

    return false;

}