#ifndef ANAGLYM_H
#define ANAGLYM_H

#include <string>
#include <lua.hpp>
#include <map>
#include "Video.h"
#include "OdeWorld/OdeWorld.h"
#include "wfobj/WFObj.hh"

#define FILENAME_SAFE_CHARS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-"

class Engine
{
    public:
        class Object
        {
            public:
                Object() { body = 0; }
                WFObj * wfobj;
                GLuint display_list;
                std::vector<dGeomID> geoms;
                dBodyID body;

                void draw();
                void loadPhy(const std::string & path,
                        bool static_data = false);
                void setPosition(double x, double y, double z);
                void getPosition(double * x, double * y, double * z);
        };

        Engine();
        ~Engine();

        std::string locateResource(const std::string & shortname);
        Video * getVideo() { return m_video; }
        bool load(const char * program);
        void run();
        void reportErrors(int status);
        OdeWorld & getWorld() { return m_world; }
        int addObject(WFObj * obj);
        Object * getObject(int id);
        void doPhysics();

        /* lua services */
        int startFrame(lua_State * L);
        int endFrame(lua_State * L);
        int setCamera(lua_State * L);

    protected:
        static Uint32 updateCallback(Uint32 interval, void * param);
        static SDL_Event userEvent;

        Uint32 updateCallback(Uint32 interval);
        void registerLibraries();
        bool fileExists(const std::string & path);
        void update();

        lua_State * m_luaState;
        Video *     m_video;
        std::string m_program_path;
        OdeWorld    m_world;
        std::map<int, Object *> m_objects;
        int         m_next_object_index;
        GLdouble    m_eye[3];
        GLdouble    m_center[3];
        GLdouble    m_up[3];
        bool        m_drawing;
};

extern Engine * g_engine;

#endif