#ifndef slic3r_ImGuiWrapper_hpp_
#define slic3r_ImGuiWrapper_hpp_

#include <string>
#include <map>

class wxMouseEvent;
class ImFont;
class ImDrawData;

namespace Slic3r {
namespace GUI {

class ImGuiWrapper
{
    std::string m_glsl_version_string;
    unsigned int m_shader_handle;
    unsigned int m_vert_handle;
    unsigned int m_frag_handle;
    unsigned int m_vbo_handle;
    unsigned int m_elements_handle;
    int m_attrib_location_tex;
    int m_attrib_location_proj_mtx;
    int m_attrib_location_position;
    int m_attrib_location_uv;
    int m_attrib_location_color;

    typedef std::map<std::string, ImFont*> FontsMap;

    FontsMap m_fonts;
    unsigned int m_font_texture;

public:
    ImGuiWrapper();

    bool init();
    void shutdown();

    void set_display_size(float w, float h);
    void update_mouse_data(wxMouseEvent& evt);

    void new_frame();
    void render();

    void set_next_window_pos(float x, float y, int flag);
    void set_next_window_bg_alpha(float alpha);

    bool begin(const std::string& name, int flags = 0);
    void end();

    bool input_double(const std::string& label, double& value, const std::string& format = "%.3f");

    bool input_vec3(const std::string& label, Vec3d& value, float width, const std::string& format = "%.3f");

private:
    void create_device_objects();
    void create_fonts_texture();
    bool check_program(unsigned int handle, const char* desc);
    bool check_shader(unsigned int handle, const char* desc);
    void render_draw_data(ImDrawData* draw_data);
    void destroy_device_objects();
    void destroy_fonts_texture();
};

} // namespace GUI
} // namespace Slic3r

#endif // slic3r_ImGuiWrapper_hpp_