#include <Arduino.h>

//////////
// LEDS //
//////////
const byte led[] = {25, 26, 27};  // {r, g, b}

int intensidade;
bool cor = 0;
unsigned long timer_mudar_cor = 0;


//////////////////
// SOUND SENSOR //
//////////////////
const byte sensorSom = 13; // being represented by slide potentiometer

int MinMax[2];
int volume = -1;
byte iterar = 0;
byte iterarGoal = 50;


// calibration button //
const byte botao = 32;


// function prototypes //
void Calibrar(), TesteLed(), ReagirLed();



void setup()
{
  Serial.begin(9600);

  pinMode(sensorSom, INPUT);
  pinMode(botao, INPUT_PULLDOWN);

  for (int i = 0; i < 3; i++)
  {
    pinMode(led[i], OUTPUT);
  }

  // Leds setup
  Calibrar();
}

void loop()
{
  volume += analogRead(sensorSom);
  iterar++;
  timer_mudar_cor++;

  ReagirLed();

  if(digitalRead(botao) == 1)
  {
    Serial.println("Calibrando...");
    Calibrar();
  }

  delay(2);
}

void Calibrar()
{
  volume = analogRead(sensorSom);

  MinMax[0] = volume * 0.9;
  MinMax[1] = volume * 1.1;

  for (int i = 0; i < iterarGoal; i++)
  {
    do
    {
      volume = analogRead(sensorSom);
      
      if (volume < MinMax[0])
      {
        MinMax[0] = volume;
        Serial.println("menor");
        Serial.println(volume);
      }
      else if (volume > MinMax[1])
      {
        MinMax[1] = volume;
        Serial.println("maior");
        Serial.println(volume);
      }
    } while (digitalRead(botao) == 1);

    delay(10);
  }

  if (MinMax[0] * 1.31 < MinMax[1] * 0.69)
  {
    MinMax[0] *= 1.31;
    MinMax[1] *= 0.69;
  }

  Serial.print("Min: ");
  Serial.println(MinMax[0]);
  Serial.print("Max: ");
  Serial.println(MinMax[1]);

  TesteLed();
  delay(1000);
}

void TesteLed()
{
    Serial.println("test leds");
    
    digitalWrite(led[0], HIGH);
    delay(150);
    digitalWrite(led[1], HIGH);
    delay(150);
    digitalWrite(led[2], HIGH);

    delay(150);
    digitalWrite(led[0], LOW);
    delay(150);
    digitalWrite(led[1], LOW);
    delay(150);
    digitalWrite(led[2], LOW);

    delay(150);
}

void ReagirLed()
{
  if (iterar == iterarGoal)
  {
    volume /= iterarGoal;
    Serial.println(volume); // average volume for that period

    volume = constrain(volume, MinMax[0], MinMax[1]);
    intensidade = map(volume, MinMax[0], MinMax[1], 0, 255);
    
    Serial.println(intensidade);
    Serial.println("____");

    analogWrite(led[2], 255 - intensidade);
    analogWrite(led[cor], intensidade);

    if (timer_mudar_cor == 32500)
    { // change current color
      Serial.println("mudou");

      cor = !cor;

      analogWrite(led[cor], 0);
      analogWrite(led[!cor], 0);

      timer_mudar_cor = 0;
    }

    iterar = 0;
    volume = 0;
  }
}