// NeoPixel Ring simple sketch (c) 2013 Shae Erisson
// Released under the GPLv3 license to match the rest of the
// Adafruit NeoPixel library

#include <Adafruit_NeoPixel.h>

#define FRECUENCY_7HZ 143 // Milliseconds
#define FRECUENCY_12HZ 83
#define FRECUENCY_18HZ 56
#define FRECUENCY_30HZ 33

// Which pin on the ESP is connected to the potentiometer?
#define POTENTIOMETER_INPUT 26 

// Which pin on the ESP is connected to the botton?
#define BOTTON 4

// Which pin on the ESP is connected to the NeoPixels?
#define LED_PIN 15

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 16

Adafruit_NeoPixel pixels(NUMPIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);

int sequencing = 0;
int adcValue = 0;
int brightness = 0;
unsigned int aux_time = 0;
bool turn = true;

void setup() {
  pixels.begin(); // INITIALIZE NeoPixel strip object

  pinMode(BOTTON, INPUT_PULLUP);
  //Serial.begin(115200);
}

void loop() {

    adcValue = analogRead(POTENTIOMETER_INPUT);
    brightness = map(adcValue, 0, 4095, 0, 255);

    if(digitalRead(BOTTON) == LOW){
      delay(100); //Time to debounce
      if(digitalRead(BOTTON) == HIGH){
      sequencing++;
      }else if(millis() >= (3000UL + aux_time)){
          colorWipe(pixels.Color(0,   0,   0), brightness);
          if(turn){
            turn = false;
            aux_time = millis();
          }else if(!turn){
            turn = true;
            aux_time = millis();
          }
        }
    }else{
      aux_time = millis();
    }

    if(turn){
      switch(sequencing){
        case 0:
          colorWipe(pixels.Color(0,   0,   255), brightness); 
          delay(FRECUENCY_7HZ);
          colorWipe(pixels.Color(255,   0,   0), brightness); 
          delay(FRECUENCY_7HZ);
          //Serial.println("7Hz");
        break;
        case 1:
          colorWipe(pixels.Color(0,   0,   255), brightness); 
          delay(FRECUENCY_12HZ);
          colorWipe(pixels.Color(255,   0,   0), brightness); 
          delay(FRECUENCY_12HZ);
          //Serial.println("12Hz");
        break;
        case 2:
          colorWipe(pixels.Color(0,   0,   255), brightness); 
          delay(FRECUENCY_18HZ);
          colorWipe(pixels.Color(255,   0,   0), brightness); 
          delay(FRECUENCY_18HZ);
          //Serial.println("18Hz");
        break;
        case 3:
          colorWipe(pixels.Color(0,   0,   255), brightness); 
          delay(FRECUENCY_30HZ);
          colorWipe(pixels.Color(255,   0,   0), brightness); 
          delay(FRECUENCY_30HZ);
          //Serial.println("30Hz");
        break;
        default:
          sequencing = 0;
        break;
      }
    }
}

void colorWipe(uint32_t color, int brightness_p) {
  pixels.clear();
  for(int i=0; i<pixels.numPixels(); i++) { // For each pixel in strip...
    pixels.setPixelColor(i, color);         //  Set pixel's color (in RAM)
    pixels.show();                          //  Update strip to match
  }
  pixels.setBrightness(brightness_p);
}