#include <string>
#include <memory>

class IStats
{
public:
    virtual ~IStats() {}

    // Getters
    virtual int Hp() =0;
    virtual int Mp() =0;
    // etc...
    //virtual int Helm() =0;
    //virtual int Body() =0;
    //virtual int Glove() =0;
    //virtual int Legs() =0;
    //virtual int Weapon() =0;

    // Setters 
    // Here or in a separate IStateKeeper interface?
    // i.e. this is a "read only" interface while 
    // IStateKeeper is a "writer/updater" interface.
    // ...
};

class PlayerMonsterStats : public IStats
{
public:
    PlayerMonsterStats()
        : m_hp(0), m_mp(0)
    {
        // ...
    }

    // IStats
    virtual int Hp() { return m_hp; }
    virtual int Mp() { return m_mp; }

    // etc...

private:
    int m_hp;
    int m_mp;

    // etc...
};


class StatsFactory
{
public:
    static IStats* CreateStats(const std::string& objectType)
    {
        if (objectType == "player")
            return new PlayerMonsterStats;

        if (objectType == "monster")
            return new PlayerMonsterStats;

        //if (objectType == "robot")
        //    return new RobotStats;

        return 0;
    }
};

int main()
{
    std::auto_ptr<IStats> playerStats(StatsFactory::CreateStats("player"));
    int hp = playerStats->Hp();

	return 0;
}

class IInventory
{
public:
    virtual int 
        /* These might return references to other objects i.e. IInventoryItem? */ 
        Gold() =0;
    // etc.
};

class Inventory : public IInventory
{
public:
    // IInventory:
    virtual int Gold() { return m_gold; }

    // etc..
private:
    int m_gold;     // These in turn might be references to other objects
                    // i.e. IInventoryItem ?
    int m_potion;

};

class IGameRespository
{
public:
    std::list<IStats*> GetPlayerStats(char* playerName) =0;
    void SavePlayerStats(char* playerName, IStats* state) =0;
};

class GameRepository : public IGameRepository
{
public:
    GameRepository(char* filePath)
    {
        // Open XML doc, prepare for queries
    }

    // etc...
};