/*
 *  The Mana Server
 *  Copyright (C) 2004-2010  The Mana World Development Team
 *
 *  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 ATTRIBUTEMANAGER_H
#define ATTRIBUTEMANAGER_H

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

#include "utils/string.h"
#include "utils/xml.h"

class AttributeInfo;

enum ScopeType
{
    BeingScope = 0,
    CharacterScope,
    MonsterScope,
    // Add new types here as needed
    MaxScope
};

/**
 * Identifies a modifier by the attribute id that it applies to and its layer
 * index in the stack of modifiers for that attribute.
 */
struct ModifierLocation
{
    int attributeId;
    int layer;

    ModifierLocation(int attributeId, int layer)
        : attributeId(attributeId)
        , layer(layer)
    {}

    bool operator==(const ModifierLocation &other) const
    { return attributeId == other.attributeId && layer == other.layer; }
};

class AttributeManager
{
    public:
        AttributeManager()
        {}

        /**
         * Loads attribute reference file.
         */
        void initialize();

        /**
         * Reloads attribute reference file.
         */
        void reload();
        void deinitialize();

        AttributeInfo *getAttributeInfo(int id) const;
        AttributeInfo *getAttributeInfo(const std::string &name) const;

        const std::set<AttributeInfo *> &getAttributeScope(ScopeType) const;

        ModifierLocation getLocation(const std::string &tag) const;

        const std::string *getTag(const ModifierLocation &location) const;

        void readAttributeNode(xmlNodePtr attributeNode);

        void checkStatus();

    private:
        void readModifierNode(xmlNodePtr modifierNode, int attributeId,
                              AttributeInfo *info);

        std::set<AttributeInfo *> mAttributeScopes[MaxScope];

        std::map<int, AttributeInfo *> mAttributeMap;
        utils::NameMap<AttributeInfo *> mAttributeNameMap;

        std::map<std::string, ModifierLocation> mTagMap;
};

extern AttributeManager *attributeManager;

#endif // ATTRIBUTEMANAGER_H