#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

const int redLed = 12;
const int greenLed = 10;
const int yellowLed = 8;
const int blueLed = 7;

//Define constants for buttons and variables
float buttonAState = 0.0;
float buttonBState = 0.0;
unsigned long startTime = 0;
bool tuneUp = false;
bool tuneDown = false;
bool volUp = false;
bool volDown = false;

void setup() {
    pinMode(redLed, OUTPUT);
    pinMode(greenLed, OUTPUT);
    pinMode(yellowLed, OUTPUT);
    pinMode(blueLed, OUTPUT);
    Serial.begin(9600);
    
    // LCD stuff
    lcd.init();
    lcd.backlight();
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Issokay");
    lcd.setCursor(0, 1);
    lcd.print("   ANDREW   ");
    delay(1000);
    lcd.clear();
}

void loop() {

// Read the seek station buttons states
  buttonAState = (analogRead(A2) * 5)/1023;
  buttonBState = (analogRead(A3) * 5)/1023;
  
  // Update button press states with debounce
  if (buttonAState >= 2.0 && buttonAState <= 2.8) {
    startTime = millis();
    tuneUp = true;
  } else if (buttonAState <= 1.5) {
    startTime = millis();
    tuneDown = true;
  }else {
    tuneUp = false;
    tuneDown = false;
  }

  if (buttonBState >= 2.0 && buttonBState <= 2.8) {
    startTime = millis();
    volUp = true;
  } else if (buttonBState <= 1.5) {
    startTime = millis();
    volDown = true;
  }else {
    volUp = false;
    volDown = false;
  }
  
  // Check button states and press duration
  unsigned long pressDuration = millis() - startTime;

  // Check for the tune button    
  if (tuneUp && pressDuration < 150) {
    digitalWrite(redLed, HIGH);
    
  } else if (tuneDown && pressDuration < 150) {
    digitalWrite(greenLed, HIGH);
    
  } else if (tuneUp) {
    digitalWrite(redLed, LOW);

  } else if (tuneDown) {
    digitalWrite(greenLed, LOW);
  }
  
  // Check for the volume button
  if (volUp) {
    digitalWrite(yellowLed, HIGH);

  } else if (volDown) {
    digitalWrite(blueLed, HIGH);
  }

  /*
  // Reset code
  if (tuneUp && volUp) {
    si4735.setFM(8700, 10850, 8750, 10);
    delay(100);
  } else if (tuneDown && volDown) {
    si4735.setFM(8700, 10850, 10850, 10);
    delay(100);
  }
  */

    // Print voltages to the LCD
    lcd.setCursor(0, 0);
    lcd.print("Voltage A0: ");
    lcd.setCursor(13, 0);
    lcd.print(buttonAState);
    lcd.setCursor(0, 1);
    lcd.print("Voltage A1: ");
    lcd.setCursor(13, 1);
    lcd.print(buttonBState);

    delay(100); // Adjust delay as needed
}