// 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>
// #ifdef __AVR__
//  #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
// #endif

// Which pin on the Arduino is connected to the NeoPixels?
#define PIN        6 // On Trinket or Gemma, suggest changing this to 1

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 120 // Popular NeoPixel ring size

// When setting up the NeoPixel library, we tell it how many pixels,
// and which pin to use to send signals. Note that for older NeoPixel
// strips you might need to change the third parameter -- see the
// strandtest example for more information on possible values.
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#define DELAYVAL 50 // Time (in milliseconds) to pause between pixels

const byte segment = NUMPIXELS / 6;
const byte segments[6] = {segment, segment * 2, segment * 3, segment * 4, segment * 5, segment * 6};
byte s = 0;

#define butPin 2

bool active = false;

const byte timeBut = 200;
uint64_t lastTimeBut;
byte lastButState;

void setup() {
  Serial.begin(9600);
  Serial.println("Отправляй любое число в стролу");

  pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
  pixels.clear();

  pinMode(butPin, INPUT_PULLUP);

}

void loop() {
  if(!active) {
    checkBut();
  }
  else {
    //pixels.clear(); // Set all pixel colors to 'off'

    // The first NeoPixel in a strand is #0, second is 1, all the way up
    // to the count of pixels minus one.
    for(int i=0; i<NUMPIXELS; i++) { // For each pixel...

      // pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
      // Here we're using a moderately bright green color:
      byte j = 1;
      int a = 255;
      while(i >= 0 && j < 6) {
        if(a < 0) {
          a = 0;
        }
        pixels.setPixelColor(i - j, pixels.Color(a, a, a));   
        a -= 60;
        j++;
      }  
     
       // Send the updated pixel colors to the hardware.
      pixels.show();  
  
      delay(DELAYVAL); // Pause before next pass through loop
      if(s < 5) {
        if(i >= segments[s] && i < segments[s + 1]) {
          Serial.write(s + 1);
          Serial.read();
          while(!Serial.available()){
            delay(100);
          }
          while(Serial.available()) {
            Serial.read();
          };
          
          s++;
        }
      }
      if(i >= NUMPIXELS - 1) {
        Serial.write(s + 1);
        Serial.read();
        while(!Serial.available()){
          delay(100);
        }
        while(Serial.available()) {
          Serial.read();
        };
        s = 0;
        active = false;
        pixels.clear();
        pixels.show();  
      }
    }
  }
    
}

void checkBut() {
  byte stateBut = digitalRead(butPin);
  if(stateBut == LOW && stateBut != lastButState) {
    if(millis() - lastTimeBut > timeBut) {
      lastTimeBut = millis();
      active = true;
    }
  }
  lastButState = stateBut;
}

// void expecation(byte i) {   
//   pixels.setPixelColor(i, pixels.Color(a, a, a)); 

//   // for(byte j {0}; j < 6; j++) {
//   //   if(a < 0) {
//   //     a = 0;
//   //   }
//   //   pixels.setPixelColor(i - j, pixels.Color(a, a, a));   
//   //   a -= 60;
//   //   j++;
//   // }  
// }