#pragma once

#include <SDL/SDL.h>
#include <fftw3.h>
#include "RtAudio.h"
#include "fountain.h"

class Visualizer {
public:
    Visualizer();
    ~Visualizer();
    int main_loop();
    void poke();

    /* audio instance vars */
    /* these are public so that the audio callback can access them */
    fftw_plan _fft_plan;
    double* _audio_buffer_1;
    double* _audio_buffer_2;
    double* _raw_fft;
    double* _spectrum_buffer_1;
    double* _spectrum_buffer_2;

private:
    static int audio_callback(void *outputBuffer, void *inputBuffer,
            unsigned int nBufferFrames, double streamTime,
            RtAudioStreamStatus status, void* user_data);

    void init_gl();
    int init_sdl();

    void render(double tick_time);
    void update(double tick_time);
    void reshapeFunc(const SDL_ResizeEvent & resize_e);
    int keyboard_event(const SDL_KeyboardEvent & keyboard_e);
    void do_gl_projection();
    void clean_up();

    void draw_circle_spectrum();
    void draw_phase_loop();
    void draw_spectrum();

    Fountain* _fountain;

    /* audio instance vars */
    RtAudio* _dac;
    unsigned int _buffer_size;

    /* graphics instance vars */
    int _window_width;
    int _window_height;

};