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/*
 *  The ManaPlus Client
 *  Copyright (C) 2008-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2013  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  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, see <http://www.gnu.org/licenses/>.
 */

#include "resources/npcdb.h"

#include "logger.h"

#include "resources/beingcommon.h"
#include "resources/beinginfo.h"

#include "utils/dtor.h"
#include "configuration.h"

#include "debug.h"

namespace
{
    BeingInfos mNPCInfos;
    bool mLoaded = false;
}

extern int serverVersion;

void NPCDB::load()
{
    if (mLoaded)
        unload();

    logger->log1("Initializing NPC database...");

    loadXmlFile(paths.getStringValue("npcsFile"));
    mLoaded = true;
}

void NPCDB::loadXmlFile(const std::string &fileName)
{
    XML::Document doc(fileName);
    const XmlNodePtr rootNode = doc.rootNode();

    if (!rootNode || !xmlNameEqual(rootNode, "npcs"))
    {
        logger->log("NPC Database: Error while loading %s!",
            paths.getStringValue("npcsFile").c_str());
        mLoaded = true;
        return;
    }

    // iterate <npc>s
    for_each_xml_child_node(npcNode, rootNode)
    {
        if (xmlNameEqual(npcNode, "include"))
        {
            const std::string name = XML::getProperty(npcNode, "name", "");
            if (!name.empty())
                loadXmlFile(name);
            continue;
        }

        if (!xmlNameEqual(npcNode, "npc"))
            continue;

        const int id = XML::getProperty(npcNode, "id", 0);
        if (id == 0)
        {
            logger->log("NPC Database: NPC with missing ID in %s!",
                paths.getStringValue("npcsFile").c_str());
            continue;
        }

        BeingInfo *const currentInfo = new BeingInfo;

        currentInfo->setTargetSelection(XML::getBoolProperty(npcNode,
            "targetSelection", true));

        BeingCommon::readBasicAttributes(currentInfo, npcNode, "talk");

        currentInfo->setDeadSortOffsetY(XML::getProperty(npcNode,
            "deadSortOffsetY", 31));

        currentInfo->setAvatarId(static_cast<uint16_t>(XML::getProperty(
            npcNode, "avatar", 0)));

        SpriteDisplay display;
        for_each_xml_child_node(spriteNode, npcNode)
        {
            if (!spriteNode->xmlChildrenNode)
                continue;

            if (xmlNameEqual(spriteNode, "sprite"))
            {
                SpriteReference *const currentSprite = new SpriteReference;
                currentSprite->sprite = reinterpret_cast<const char*>(
                    spriteNode->xmlChildrenNode->content);
                currentSprite->variant =
                    XML::getProperty(spriteNode, "variant", 0);
                display.sprites.push_back(currentSprite);
            }
            else if (xmlNameEqual(spriteNode, "particlefx"))
            {
                display.particles.push_back(reinterpret_cast<const char*>(
                    spriteNode->xmlChildrenNode->content));
            }
        }

        currentInfo->setDisplay(display);
        mNPCInfos[id] = currentInfo;
    }
}

void NPCDB::unload()
{
    delete_all(mNPCInfos);
    mNPCInfos.clear();

    mLoaded = false;
}

BeingInfo *NPCDB::get(const int id)
{
    const BeingInfoIterator i = mNPCInfos.find(id);

    if (i == mNPCInfos.end())
    {
        logger->log("NPCDB: Warning, unknown NPC ID %d requested", id);
        return BeingInfo::unknown;
    }
    else
    {
        return i->second;
    }
}

uint16_t NPCDB::getAvatarFor(const int id)
{
    const BeingInfo *const info = get(id);
    if (!info)
        return 0;
    return info->getAvatarId();
}