#include <OneButton.h>
#include <RotaryEncoder.h>
#include <Adafruit_NeoPixel.h>

RotaryEncoder encoder(A2, A3, RotaryEncoder::LatchMode::TWO03);

int pin         =  3; 
int numPixels   = 16; // Popular NeoPixel ring size
#define MAX_SLIDE_POT_ANALOG_READ_VALUE 500

#define selectSW1 9
int mode = 0;
const int modes = 4;
int analogSliderValues[modes];
const int Mute = 0;
bool Muted[modes];
static int pos[modes] = {250, 250, 250, 250};
int newPos[modes] = {250, 250, 250, 250};
OneButton button(9, true);
// setPos changes between 1 and 2 depending on whether line1() or line2() is called
int setPos = 0;


int pixelFormat = NEO_GRB + NEO_KHZ800;


Adafruit_NeoPixel *pixels;
void setup() {
  button.attachClick(singleclick);                  // link the function to be called on a singleclick event.
  button.attachLongPressStop(longclick); 
  Serial.begin(9600);

  // You may have to modify the next 2 lines if using other pins than A2 and A3
  PCICR |= (1 << PCIE1);                      // This enables Pin Change Interrupt 1 that covers the Analog input pins or Port C.
  PCMSK1 |= (1 << PCINT10) | (1 << PCINT11); 

  pixels = new Adafruit_NeoPixel(numPixels, pin, pixelFormat);

  
  pixels->begin();  // This enables the interrupt for pin 2 and 3 of Port C.
}  // setup()



ISR(PCINT1_vect) {
  encoder.tick();  // just call tick() to check the state.
}  // ISR


// Read the current position of the encoder and print out when changed.
void loop() {


for (int i = 0; i < modes - 1; i++) {
    if (Muted[i]){
  analogSliderValues[i] = Mute;
 } else {
  analogSliderValues[i] = pos[i];
  }
} 


button.tick();


  if (mode == 0) {
   
    Line1();
  }

   if (mode == 1)  {
    
    Line2();
  }
  if (mode == 2)  {
   
    Line3();
  }
  if (mode == 3)  {
    
    Line4();
  }
  String p1=":";
//Serial.println(newPos + p1 + newPos1 + p1 + newPos2 + p1 + newPos3 + p1 + mode);



switch(setPos){

 case 0:{
int value_pot_a = pos[0];
  int num_leds_switchedon = map(value_pot_a, 0, MAX_SLIDE_POT_ANALOG_READ_VALUE, 0, numPixels);  

 
 for (int i = 0; i < num_leds_switchedon; ++i) {
    pixels->setPixelColor(i, pixels->Color(150, 150, 150));
  }  
  // LEDs are switched off which correspond to the area right of the slide knob
  for (int i = num_leds_switchedon; i < numPixels; ++i) {
    pixels->setPixelColor(i, pixels->Color(0, 0, 0));
  }
  pixels->show();
  break;
}

case 1:{
 int value_pot_a = pos[1];
  int num_leds_switchedon = map(value_pot_a, 0, MAX_SLIDE_POT_ANALOG_READ_VALUE, 0, numPixels);  

 
 for (int i = 0; i < num_leds_switchedon; ++i) {
    pixels->setPixelColor(i, pixels->Color(150, 150, 0));
  }  
  // LEDs are switched off which correspond to the area right of the slide knob
  for (int i = num_leds_switchedon; i < numPixels; ++i) {
    pixels->setPixelColor(i, pixels->Color(0, 0, 0));
  }
  pixels->show();
  break;
}
case 2:{
 int value_pot_a = pos[2];
  int num_leds_switchedon = map(value_pot_a, 0, MAX_SLIDE_POT_ANALOG_READ_VALUE, 0, numPixels);  

 
 for (int i = 0; i < num_leds_switchedon; ++i) {
    pixels->setPixelColor(i, pixels->Color(0, 0, 150));
  }  
  // LEDs are switched off which correspond to the area right of the slide knob
  for (int i = num_leds_switchedon; i < numPixels; ++i) {
    pixels->setPixelColor(i, pixels->Color(0, 0, 0));
  }
  pixels->show();
  break;
}
case 3:{
 int value_pot_a = pos[3];
  int num_leds_switchedon = map(value_pot_a, 0, MAX_SLIDE_POT_ANALOG_READ_VALUE, 0, numPixels);  

  
 for (int i = 0; i < num_leds_switchedon; ++i) {
    pixels->setPixelColor(i, pixels->Color(150, 0, 0));
  }  
  // LEDs are switched off which correspond to the area right of the slide knob
  for (int i = num_leds_switchedon; i < numPixels; ++i) {
    pixels->setPixelColor(i, pixels->Color(0, 0, 0));
  }
  pixels->show();
  break;
}

}
//pixels->show();


sendSliderValues();
printSliderValues();
}  // loop ()



/**** Print 1st setting on Line1 ***/
void Line1() {
  if (setPos != 0) {
    setPos = 0;
    encoder.setPosition(pos[0]);
  }
  newPos[0] = encoder.getPosition();
  if (pos[0] != newPos[0]) {
    pos[0] = newPos[0];
  }
} // Line1()

/**** Print 2nd setting on Line2 ***/
void Line2() {
  if (setPos != 1) {
    setPos = 1;
    encoder.setPosition(pos[1]);
  }
  newPos[1] = encoder.getPosition();
  if (pos[1] != newPos[1]) {
    pos[1] = newPos[1];
  }
} // Line2()

void Line3() {
  if (setPos != 2) {
    setPos = 2;
    encoder.setPosition(pos[2]);
  }
  newPos[2] = encoder.getPosition();
  if (pos[2] != newPos[2]) {
    pos[2] = newPos[2];
  }
} // Line3()

void Line4() {
  if (setPos != 3) {
    setPos = 3;
    encoder.setPosition(pos[3]);
  }
  newPos[3] = encoder.getPosition();
  if (pos[3] != newPos[3]) {
    pos[3] = newPos[3];
  }
} // Line4()

void sendSliderValues() {
  String builtString = String("");

  for (int i = 0; i <= modes - 1; i++) {
    builtString += String((int)analogSliderValues[i]);

    if (i < mode) {
      builtString += String("|");
    }
  }
  
  Serial.println(builtString);
}

void printSliderValues() {
  for (int i = 0; i <= modes - 1; i++) {
    String printedString = String("Slider #") + String(i + 1) + String(": ") + String(analogSliderValues[i]) + String(" mV");
    Serial.write(printedString.c_str());

    if (i < mode) {
      Serial.write(" | ");
    } else {
      Serial.write("\n");
    }
  }
}


void singleclick(){  
mode++;
if (mode > modes) {
mode = 0;
}                               // what happens when the button is clicked                             // turn off the gren led
}
 
void longclick(){ 
                                  // what happens when buton is long-pressed
switch(mode){
      case 0:{
        Muted[0] = !Muted[0];
        break;
      }
      case 1:{
         Muted[1] = !Muted[1];
        break;
      }
      case 2:{
         Muted[2] = !Muted[2];
        break;
      }
      case 3:{}
         Muted[3] = !Muted[3];
        break;
}
      
      }