#include <LiquidCrystal.h>
#include <NewPing.h>
#include <Wire.h>
#include <Adafruit_HTU21DF.h>

#include <Si4703.h>
#include <Arduino.h>
Si4703 radio;
const int ledPin = 7;
Adafruit_HTU21DF htu = Adafruit_HTU21DF();
#define PCF8563_ADDRESS 0x51 // I2C address for the PCF8563 RTC
#define TRIGGER_PIN  11  // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define ECHO_PIN     12  // Arduino pin tied to echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters).
unsigned long upButtonCode = 0xFFA857; // Replace with your actual code
unsigned long downButtonCode = 0xFFE01F;
unsigned long leftButtonCode = 0xFFA857; // Replace with your actual code
unsigned long rightButtonCode = 0xFFE01F;
unsigned long okButtonCode = 0xFFA857; // Replace with your a
int menu = 0;
const int upButton = 13;
const int downButton = 6;
const int pinCLK = 14;     // Connect KY-040 CLK pin to D4
const int pinDT = 15;      // Connect KY-040 DT pin to D3
const int pinSW = 16;      // Connect KY-040 SW pin to D2
LiquidCrystal lcd( 9, 8, 2, 3, 4, 5);
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
int counter = 0;          // Counter value for the rotary encoder
int currentStateCLK;
int lastStateCLK;
String currentDir ="";    // The current direction of rotation
bool buttonPressed = false;
// Initialize the library with the pins used for the LCD
// RS, E, D4, D5, D6, D7

#include <IRremote.h>

int IR_PIN = 10; // Define the pin connected to the IR receiver data pin
IRrecv irrecv(IR_PIN);
decode_results results;
void setup() {
Serial.begin(9600);
//radio.start();
    //radio.setChannel(96.4);
  pinMode(14, INPUT_PULLUP);
  pinMode(15, INPUT_PULLUP);
  pinMode(16, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
   lastStateCLK = digitalRead(14);
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("hello world");
  irrecv.enableIRIn();
  //setDateTime(23, 4, 5, 12, 34, 56);
  pinMode(13, INPUT_PULLUP);
  delay(1000);
}

void loop() {
  digitalWrite(ledPin, HIGH);
  updateDisplay();
  currentStateCLK = digitalRead(14);

  // If last and current state of CLK are different, then a pulse occurred
  if (currentStateCLK != lastStateCLK) {
    // If the DT state is different than the CLK state, that means the encoder is rotating clockwise
    if (digitalRead(15) != currentStateCLK) {
      counter ++;
      currentDir = "CW";
    } else {
      // Otherwise, it's rotating counter-clockwise
      counter --;
      currentDir = "CCW";
    }
    Serial.print("Direction: ");
    Serial.print(currentDir);
    Serial.print(" | Counter: ");
    Serial.println(counter);
  }

  // Save the current state as the last state, for next time through the loop
  lastStateCLK = currentStateCLK;

  // Check if push button is pressed
  if (!digitalRead(16) && !buttonPressed) { // If the button is pressed
    buttonPressed = true;
    Serial.println("Button Pressed!");
  } else if (digitalRead(16)) { // If the button is released
    buttonPressed = false;
  }

  // (note: line 1 is the second row, since counting begins with 0):
  //printDateTime();
//Serial.print("Temp: "); Serial.print(htu.readTemperature());
 // Serial.print("\tHum: "); Serial.println(htu.readHumidity());
if (!digitalRead(upButton))  {
  menu++;
Serial.print("menu: "); Serial.print(menu);
}
  if (irrecv.decode(&results)) {
     Serial.println(results.value, HEX);
    lcd.setCursor(0, 1);
    lcd.print(results.value, HEX); // Print the hexadecimal value of the received IR signal
    if (results.value == upButtonCode) {
      menu++;
      Serial.println("up button pressed");
      lcd.setCursor(10, 1);
    lcd.print("up   ");
    } else if (results.value == downButtonCode) {
      menu--;
      Serial.println("down button pressed");
      lcd.setCursor(10, 1);
    lcd.print("down ");
    }else if (results.value == leftButtonCode) {
      // Code to decrease volume or variable
      Serial.println("left button pressed");
      lcd.setCursor(10, 1);
    lcd.print("left ");
    }else if (results.value == rightButtonCode) {
      // Code to decrease volume or variable
      Serial.println("right button pressed");
      lcd.setCursor(10, 1);
    lcd.print("right");
    }else if (results.value == okButtonCode) {
      // Code to decrease volume or variable
      Serial.println("ok button pressed");
lcd.setCursor(10, 1);
    lcd.print("ok   ");
    }
    irrecv.resume(); 
     if (menu > 4) { // Assuming 4 menu items
    menu = 1;
  } else if (menu < 1) {
    menu = 4;
  }// Receive the next value
  }
  delay(100);
  updateDisplay(); // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.

  
}

void setDateTime(byte year, byte month, byte day, byte hour, byte minute, byte second) {
  Wire.beginTransmission(PCF8563_ADDRESS);
  Wire.write(0x02); // Start at location 2
  Wire.write(decToBcd(second));
  Wire.write(decToBcd(minute));
  Wire.write(decToBcd(hour));
  Wire.write(decToBcd(day));
  Wire.write(decToBcd(month));
  Wire.write(decToBcd(year));
  Wire.endTransmission();
}

byte bcdToDec(byte val) {
  return (val / 16 * 10) + (val % 16);
}

byte decToBcd(byte val) {
  return (val / 10 * 16) + (val % 10);
}

void printDateTime() {
  Wire.beginTransmission(PCF8563_ADDRESS);
  Wire.write(0x02); // set the register pointer to (0x02)
  Wire.endTransmission();

  Wire.requestFrom(PCF8563_ADDRESS, 7);

  byte second = bcdToDec(Wire.read() & 0x7F);
  byte minute = bcdToDec(Wire.read() & 0x7F);
  byte hour = bcdToDec(Wire.read() & 0x3F);
  byte day = bcdToDec(Wire.read() & 0x3F);
  byte weekday = bcdToDec(Wire.read() & 0x07);
  byte month = bcdToDec(Wire.read() & 0x1F);
  byte year = bcdToDec(Wire.read());

  Serial.print("Date: ");
  Serial.print(2000 + year);
  Serial.print("-");
  Serial.print(month);
  Serial.print("-");
  Serial.print(day);
  Serial.print(" Time: ");
  Serial.print(hour);
  Serial.print(":");
  Serial.print(minute);
  Serial.print(":");
  Serial.println(second);
}
void updateDisplay() {
  lcd.clear();
  switch (menu) {
    case 1:
      // Read from the distance sensor
      unsigned int us = sonar.ping();
      unsigned int distance = us / US_ROUNDTRIP_CM;
      // Display the distance on the LCD
      lcd.setCursor(0, 0);
      lcd.print("Distance: ");
      lcd.setCursor(0, 1);
      if (distance>99){
    
  // Print a message to the LCD.
  lcd.print(distance);
  }
  else if (distance>9){
    
  // Print a message to the LCD.
  lcd.print(" ");
  lcd.print(distance);
  }
  else{
 
  // Print a message to the LCD.
  lcd.print("  ");
  lcd.print(distance);
}
      lcd.print(" cm");
      break;
    case 2:
    //Serial.print("Temp: "); Serial.print(htu.readTemperature());
 // Serial.print("\tHum: "); Serial.println(htu.readHumidity());
      lcd.print("Menu 2");
      break;
    case 3:
     //printDateTime();
      lcd.print("Menu 3");
      break;
    case 4:
    int signalStrength = radio.getRSSI();
    lcd.setCursor(0, 0);
      lcd.print("frequency: 96.4 ");
      lcd.setCursor(0, 1);
      lcd.print(" RSSI:.... ");
      lcd.print("ass");
  Serial.print("Signal strength: ");
  Serial.println(signalStrength);
     
      break;
  }
  // Add more cases as per your menu items
}