#ifndef GUI_HPP
#define GUI_HPP

#include "wrap-string.hpp"
#include "wrap-map.hpp"
#include "wrap-vector.hpp"

#include "luastack.hpp"
#include "streambuffer.hpp"

class GuiElt : public eng::nevernew {
    friend class Gui;
public:
    enum Type {
        TYPE_MENU_ITEM,
    };
private:
    Type type_;
    eng::string action_;
    eng::string label_;

    GuiElt() {}
public:
    ~GuiElt() {}
    Type type() const { return type_; }
    const eng::string &action() const { return action_; }
    const eng::string &label() const { return label_; }
};

class Gui : public eng::nevernew {
public:
    using EltVec = eng::vector<GuiElt>;
private:
    int64_t place_;
    EltVec elts_;
public:
    Gui() { place_ = 0; }
    int64_t place() { return place_; }
    const EltVec &elts() const { return elts_; }
    void clear(int64_t p) { place_ = p; elts_.clear(); }
    bool has_action(const eng::string &action) const;
    void menu_item(const eng::string &action, const eng::string &label);
    eng::string get_action(int64_t index);
    eng::string menu_debug_string() const;

    // Put a pointer to a gui into the lua registry.
    //
    // All lua commands that manipulate the GUI implicitly
    // operate on this global gui pointer.
    //
    static void store_global_pointer(lua_State *L, Gui *g);
    static Gui *fetch_global_pointer(lua_State *L);
};


#endif // GUI_HPP