#ifndef DEPTHGUIDE_RENDER_MESH_H
#define DEPTHGUIDE_RENDER_MESH_H

#include "render_utility.h"

#include <memory>

class mesh_type {
public:

    ~mesh_type();

    struct create_config {
        std::string path;
    };

    using this_type = mesh_type;
    using pointer = std::shared_ptr<mesh_type>;

    static pointer create(const create_config &conf);

    struct gl_info_type : private boost::noncopyable {
        GLuint vao = 0; // Vertex Array Object
        GLuint vbo = 0; // Vertex Buffer Object
        GLuint ebo = 0; // Element Buffer Object
        GLuint num_triangle = 0; // number of triangles

        ~gl_info_type();
    };

    gl_info_type *get_gl_info();

private:
    struct impl;
    std::unique_ptr<impl> pimpl;
};

using mesh_ptr = mesh_type::pointer;

enum mesh_render_mode {
    MESH_NORMAL,
    MESH_DEPTH_ALPHA
};

struct material_type {
    glm::vec3 ambient;
    glm::vec3 diffuse;
};

struct mesh_info_type {
    mesh_type *mesh = nullptr;
    glm::mat4 transform = {};

    // make scene_render happy
    using material_type = ::material_type;
    material_type material = {};
};

struct camera_info_type {
    glm::mat4 transform;
    glm::mat4 project;
};

struct light_info_type {
    glm::vec3 direction;
};

struct mesh_render_info {
    mesh_render_mode mode = MESH_NORMAL;
    mesh_info_type model = {};
    camera_info_type camera = {};
    light_info_type light = {};

    union {
        struct {
        } normal;
        struct {
            mesh_info_type bg;
            float alpha_factor;
            bool show_bg;
        } depth_alpha;
    } extra = {};
};

void render_mesh(const mesh_render_info &info);

#endif //DEPTHGUIDE_RENDER_MESH_H