// C++ code
//
/*
  LiquidCrystal Library - Hello World

   Demonstrates the use of a 16x2 LCD display.
  The LiquidCrystal library works with all LCD
  displays that are compatible with the  Hitachi
  HD44780 driver. There are many of them out
  there, and you  can usually tell them by the
  16-pin interface.

  This sketch prints "Hello World!" to the LCD
  and shows the time.

  The circuit:
  * LCD RS pin to digital pin 12
  * LCD Enable pin to digital pin 11
  * LCD D4 pin to digital pin 5
  * LCD D5 pin to digital pin 4
  * LCD D6 pin to digital pin 3
  * LCD D7 pin to digital pin 2
  * LCD R/W pin to ground
  * LCD VSS pin to ground
  * LCD VCC pin to 5V
  * 10K resistor:
  * ends to +5V and ground
  * wiper to LCD VO pin (pin 3)

  Library originally added 18 Apr 2008  by David
  A. Mellis
  library modified 5 Jul 2009  by Limor Fried
  (http://www.ladyada.net)
  example added 9 Jul 2009  by Tom Igoe
  modified 22 Nov 2010  by Tom Igoe

  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/LiquidCrystal
*/

#include <LiquidCrystal.h>

int seconds = 0;

// LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

#include <IRremote.h>

// Pin definitions
#define PIN_RECEIVER 2   // Signal Pin of IR receiver

#define RELAY_PIN 3
#define TRIG_PIN 4
#define ECHO_PIN 5

// Constants
#define TIMEOUT_DURATION 10000 // 10 seconds timeout
#define CAN_DISTANCE_THRESHOLD 10 // Distance in cm to detect a can

// Variables
IRrecv receiver(PIN_RECEIVER);

decode_results results;
bool motorState = false;
unsigned long lastCanDetectedTime = 0;
int crushedCanCount = 0;


void setup() {
  // Initialize serial for debugging
  Serial.begin(9600);

  receiver.enableIRIn(); // Start the receiver

  // Initialize relay pin
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);

  // Initialize ultrasonic sensor pins
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  // Initialize LCD
  lcd.begin(16, 2);
  lcd.print("Can Crusher");
  lcd.setCursor(0, 1);
  lcd.print("Count: 0");
}

void loop() {
  // Check for IR remote input
  if (receiver.decode()) {
    Serial.print("IR Value:");
    Serial.println(receiver.decodedIRData.command);
    if (receiver.decodedIRData.command == 162) { // Example HEX code for a specific button
      motorState = !motorState; // Toggle motor state
      digitalWrite(RELAY_PIN, motorState ? HIGH : LOW); // Turn relay on/off
      lastCanDetectedTime = millis(); // Reset timeout timer
    }
    receiver.resume();  // Receive the next value
  }

  // Check ultrasonic sensor for can detection
  if (motorState) {
    long duration, distance;
    digitalWrite(TRIG_PIN, LOW);
    delayMicroseconds(2);
    digitalWrite(TRIG_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIG_PIN, LOW);
    duration = pulseIn(ECHO_PIN, HIGH);
    distance = duration * 0.034 / 2; // Calculate distance in cm

    if (distance < CAN_DISTANCE_THRESHOLD) {
      crushedCanCount++; // Increment crushed can count
      lastCanDetectedTime = millis(); // Reset timeout timer

      // Update LCD display
      lcd.setCursor(7, 1);
      lcd.print(crushedCanCount);
    }

    // Check for timeout
    if (millis() - lastCanDetectedTime > TIMEOUT_DURATION) {
      motorState = false; // Turn off motor
      digitalWrite(RELAY_PIN, LOW); // Turn off relay
    }
  }

  // Small delay to avoid overloading the loop
  delay(100);
}