#ifndef O3D_OBJ3D_H
#define O3D_OBJ3D_H

#include <vector>
#include <array>
#include <iterator>
#include "o3d/vertex.h"
#include "o3d/tri_vertex.h"

namespace engine::o3d {

class Object3D {
    public:
        class TriangleVertex3Iterator {
            public:
                using iterator_category = std::input_iterator_tag;
                using value_type = TriangleVertex3;
                using difference_type = TriangleVertex3;
                using pointer = const TriangleVertex3*;
                using reference = TriangleVertex3;

                explicit TriangleVertex3Iterator(const Object3D* obj, int face_ind = 0);
                TriangleVertex3Iterator& operator++();
                TriangleVertex3Iterator operator++(int);
                bool operator==(TriangleVertex3Iterator other) const;
                bool operator!=(TriangleVertex3Iterator other) const;
                reference operator*() const;

            private:
                const Object3D* obj;
                int face_ind;

        };

        static Object3D cube(); // this function should not be in this file

        Object3D(std::vector<Vertex3> pts, std::vector<std::array<int, 3>> faces);
        TriangleVertex3Iterator begin();
        TriangleVertex3Iterator end();

    private:
        std::vector<Vertex3> pts;
        std::vector<std::array<int, 3>> faces;
};

}

#endif // O3D_OBJ3D_H