#include <IRremote.h>
//#include <ledControl.h>
#include <LiquidCrystal.h>


const int irReceiverPin = 2; // IR receiver pin assignments
IRrecv irrecv(irReceiverPin);
decode_results results;

LiquidCrystal lcd(12, 11, 10, 9, 8, 7); //change these values

const int led = 3; //led pin
const int potR = A0; //potentiometer

//Sensor Pin Assignments
const int trigPin = 51;
const int echoPin = 53;
const int servoPin;
String distanceThreshold = "100";
int distanceThresh = distanceThreshold.toInt(); //threshold in centimeters
float time, calculateDistance;

void setup() {
  Serial.begin(9600);
  //Initialize led
  pinMode(led, OUTPUT);

  // Initialize LCD 
  lcd.begin(16, 2);
  
  // Initialize IR remote
  irrecv.enableIRIn();

  //Initialize potentiometer
  pinMode(led, OUTPUT); //led PIN --fix
  pinMode(3, INPUT); //Pontentiometer pin --fix

  //Initialize Sensor
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  
}

int readPot(int pin) {
  return map(analogRead(pin), 0, 1023, 0, 255);
}

  boolean sensorMode = true;
  boolean remoteMode = false;
  boolean ledStatus = false;

void loop() {
  
  //SENSOR MODE
  if (sensorMode == true) {
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    time = pulseIn(echoPin, HIGH);
    remoteMode = false;
    lcd.setCursor(0,1);
    lcd.print("MODE: SENSOR");
    calculateDistance = (0.034/2) * time;
    //lcd.print(calculateDistance);
    if (calculateDistance <= distanceThresh){
      
      ledStatus = true;
      digitalWrite(led, HIGH);
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("LED: ON");
      lcd.setCursor(0,1);
      lcd.print("MODE: SENSOR");
      analogWrite(led, readPot(potR));
    }
    else{
      ledStatus = false;
      digitalWrite(led, LOW);
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("LED: OFF");
      lcd.setCursor(0,1);
      lcd.print("MODE: SENSOR");
    }
  }
  //CHECK REMOTE SIGNAL

  
  if (irrecv.decode()) {
    // Power button pressed
    if (irrecv.decodedIRData.decodedRawData == 1570963200) {
      if(remoteMode = true) {
        sensorMode = true;
      }
      else if (sensorMode == true) {
        remoteMode = true;
      }
          //REMOTE MODE

      if (remoteMode == true){
        lcd.setCursor(0,1);
        lcd.print("MODE: REMOTE");
        sensorMode = false;
      }
    }
    if (irrecv.decodedIRData.decodedRawData == 1738080000) { //volume up
        ledStatus = true;
        digitalWrite(led, HIGH);
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("LED: ON");
        lcd.setCursor(0,1);
        lcd.print("MODE: REMOTE");
     
      } else if (irrecv.decodedIRData.decodedRawData == 4244832000) { //volume down
        ledStatus = false;
        digitalWrite(led, LOW);
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("LED: OFF");
        lcd.setCursor(0,1);
        lcd.print("MODE: REMOTE");
      }
      irrecv.resume(); // Receive the next value
    }
  


  //led IS TRUE
  if (ledStatus == true){
    //If the led is ON, the potentiometer will change the brightness of the led
    int potValue = analogRead(4); //reads the potentiometer value
    //--fix potentiometer pin
    int ledValue = map(potValue, 0, 1023, 0 ,255); 
    digitalWrite(led, HIGH);

    //maps the potentiometer value that ranges from 0 - 1023 to the led brightness which ranges from 0 - 255
    analogWrite(3, ledValue); //--fix led Pin
  }

   delay(1000);
}