// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <AiEsp32RotaryEncoder.h>
#include <Bounce2.h>      //Entprellung

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
#define ROTARY_ENCODER_A_PIN 16
#define ROTARY_ENCODER_B_PIN 17
#define ROTARY_ENCODER_BUTTON_PIN 4
#define ROTARY_ENCODER_VCC_PIN -1 
#define ROTARY_ENCODER_STEPS 4
bool rotaryVol = true;
unsigned int STATIONS = 7;
unsigned int maxVol = 16;
unsigned int actStation;
unsigned int actVol;
unsigned int curVol;
unsigned long delayVol;
bool btnStation = false;

AiEsp32RotaryEncoder rotaryEncoder = AiEsp32RotaryEncoder(ROTARY_ENCODER_A_PIN, ROTARY_ENCODER_B_PIN, ROTARY_ENCODER_BUTTON_PIN, ROTARY_ENCODER_VCC_PIN, ROTARY_ENCODER_STEPS);
//Button Einstellungen
byte button_pins[] = {34, 35, 33}; // button pins, 34= taster
#define NUMBUTTONS sizeof(button_pins)
Bounce * buttons = new Bounce[NUMBUTTONS];

void rotary_loop()
{
  // process button press:
  for (int i = 0; i<NUMBUTTONS; i++) 
  {
    buttons[i].update(); // Update the Bounce instance
    if ( buttons[i].fell() ) // If it fell
    {
      switch(i) {
        case 0:
              rotaryVol = false;
              LCD.setCursor(0,1);
              LCD.print(">Station:");
              LCD.setCursor(10,1);
              LCD.print("  ");
              LCD.setCursor(10,1);
              LCD.print(actStation);
              rotaryEncoder.setBoundaries(0, STATIONS, true); //minValue, maxValue,
              rotaryEncoder.setEncoderValue(actStation);
              btnStation=true;
              break;          

      }
    }
  }
  //dont do anything unless value changed
  if (rotaryEncoder.encoderChanged())
  {
    uint16_t v = rotaryEncoder.readEncoder();
    if (!(rotaryVol))
    {
        Serial.printf("Station: %i\n",v);
        actStation = v;
        LCD.setCursor(10,1);
        LCD.print("  ");
        LCD.setCursor(10,1);
        LCD.print(actStation);
   
    }
    else
    {
         Serial.printf("Volume: %i\n",v);
         actVol = v;
         LCD.setCursor(0,1);
         LCD.print("Volume: ");
         LCD.setCursor(10,1);
         LCD.print("  ");
         LCD.setCursor(10,1);
         LCD.print(actVol);
         delayVol = millis();
    }
  }

  if (curVol != actVol && ((millis()-delayVol) > 2000))
  {
    //rotaryVol = false;
    LCD.setCursor(0,1);
    LCD.print("Station: ");
    LCD.setCursor(10,1);
    LCD.print("  ");
    LCD.setCursor(10,1);
    LCD.print(actStation);
    Serial.println("Zeit abgelaufen");
    curVol = actVol;
  }

  if (rotaryEncoder.isEncoderButtonClicked())
  {
      if (btnStation)
      {
        rotaryVol = true;
        LCD.setCursor(0,1);
        LCD.print("Station: ");
        LCD.setCursor(10,1);
        LCD.print("  ");
        LCD.setCursor(10,1);
        LCD.print(actStation);
        rotaryEncoder.setBoundaries(0, maxVol, false); //minValue, maxValue,
        rotaryEncoder.setEncoderValue(actVol);
      }
  }
}

//interrupt handling for rotary encoder
void IRAM_ATTR readEncoderISR()
{
  rotaryEncoder.readEncoder_ISR();
}

void setup_rotary()
{
  //start rotary encoder instance
  rotaryEncoder.begin();
  rotaryEncoder.setup(readEncoderISR);
  if (!(rotaryVol))
  {
      rotaryEncoder.setBoundaries(0, STATIONS, true); //minValue, maxValue, 
  }
  else
  {
      rotaryEncoder.setBoundaries(0, maxVol, false); //minValue, maxValue,
  }
  rotaryEncoder.disableAcceleration();  
}

void setup() {
  Serial.begin(115200);
  // Make input & enable pull-up resistors on pushbuttons
  for (int i=0; i<NUMBUTTONS; i++) {
    buttons[i].attach( button_pins[i], INPUT_PULLUP); // setup the bounce instance for the current button
    buttons[i].interval(25); // interval in ms
  }

  LCD.init();
  LCD.backlight();
  setup_rotary();  
  LCD.setCursor(0,0);
  LCD.print("Webradio");

        LCD.setCursor(0,1);
        LCD.print("Station: ");
        LCD.setCursor(10,1);
        LCD.print(actStation);
        
  rotaryEncoder.setBoundaries(0, maxVol, false); //minValue, maxValue,
  delayVol = millis();
  
}

void loop() {
  rotary_loop();
  delay(250);
}