#include <LiquidCrystal_I2C.h>
#include <Wire.h> 
int Contrast = 75;

const int inputPin = A3;      // Replace with the pin number you are using (e.g., 13 for onboard LED)
const int buttonPinA4 = 4;   // Pin where the push button is connected
unsigned long totalTime = 0;
unsigned long startTime = 0;
bool isHigh = false;
const unsigned long printInterval = 5000;  // Print interval in milliseconds (10 seconds)
unsigned long lastPrintTime = 0;

const int photoeyePin = 7;    // the number of the photoeye sensor pin (digital input)
const int relayPin = 5;      // the number of the relay pin
const int buttonPin1 = 8;     // the number of the first push button pin
const int buttonPin3 = 2;    // the number of the third push button pin
const int buttonPin4 = 3;
const int buttonPin5 = A2;
const int chipSelect = 10;

int count = 0;
boolean state = true;


LiquidCrystal_I2C lcd(0x27, 16, 2);
//LiquidCrystal lcd(12, 11, 5, 4, 3, 2);


// variables for photoeye sensor
unsigned long lastDetectionMillis = 0;
const long interval = 5000;  // 10 seconds in milliseconds
const int photoeyeThreshold = HIGH; // Assuming the sensor is normally HIGH and goes LOW when detecting
bool waitForButtonPress = false;

void setup() {
 


 pinMode(inputPin, INPUT);
  pinMode(buttonPinA4, INPUT_PULLUP);
  pinMode(photoeyePin, INPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(buttonPin1, INPUT_PULLUP); // Internal pull-up resistor for the first button
  pinMode(buttonPin3, INPUT_PULLUP); // Internal pull-up resistor for the third button
  pinMode(buttonPin5,  INPUT_PULLUP);

  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setBacklight(HIGH);
  lcd.setCursor(0, 0);
  lcd.print("PART:      ");
  lcd.setCursor(0, 1);
  lcd.print("LOADING");

}

void loop(){
  int currentState = digitalRead(inputPin);

  if (currentState == HIGH && !isHigh) {
    // Pin just went HIGH
    startTime = millis();
    isHigh = true;
  } else if (currentState == LOW && isHigh) {
    // Pin just went LOW
    unsigned long duration = millis() - startTime;
    totalTime += duration;
    isHigh = false;
    Serial.println("MACHINE TIMED OUT (OFF)");



    
  }
  // Check if the button is pressed and print the total time
  if (digitalRead(buttonPinA4) == LOW) {
    delay(250);
    Serial.print("Total Time Running: ");
    Serial.println(totalTime / 1000);  // Convert milliseconds to seconds
   // Serial.println(" seconds");

    // Add total elapsed time I Added
    unsigned long elapsedMillis = millis() - lastPrintTime;
    Serial.print("Total Elapsed Time: ");
    Serial.println(elapsedMillis / 1000);  // Convert milliseconds to seconds
   // Serial.println(" seconds");   //I added for total elapsed time

   Serial.print("Total part count: ");   //DIsplay total count in serial monitor
  Serial.println(count); //display total count in serial monitor

  if (count > 0) {    // parts per hour testing
    float partsPerHour = float(count) / (elapsedMillis / 60000.0);  // Calculate parts per hour Total ELpased TIme
    Serial.print("Parts Per Minute Elapsed Time: ");
    Serial.println(partsPerHour);   //parts per hour testing
  }
  if (count > 0) {    // parts per hour testing
    float partsPerHour = float(count) / (totalTime / 60000);  // Calculate parts per hour Total ELpased TIme
    Serial.print("Parts Per Minute Running Time: ");
    Serial.println(partsPerHour);   //parts per hour testing




  }
    Serial.println("END JOB");

    lcd.setCursor(0, 1);
    lcd.print("                ");
     lcd.setCursor(4, 1);
       lcd.print("JOB ENDED");
     delay(10000);
     lcd.setCursor(0, 1);
       lcd.print("                ");
       lcd.setCursor(1,1);
       lcd.print("PUSH JOB START");

    // Reset the total time
    
       //I added for total elapsed time
  }

  // Read the state of the photoeye sensor (digital):
  int sensorValue = digitalRead(photoeyePin);

  // Check if waiting for button press
  if (waitForButtonPress) {
    if (digitalRead(buttonPin1) == LOW) {
      waitForButtonPress = false;  // Button has been pressed, reset the flag
      lastDetectionMillis = millis();  // Reset the timer
      digitalWrite(relayPin, HIGH);
      delay(50);

    
      Serial.println("OTHER(MACHINE TURNED ON)");

      lcd.setCursor(0, 1);
       lcd.print("                ");
       lcd.setCursor(0,1);
       lcd.print("ON");

       
    } else if (digitalRead(buttonPin4) == LOW) {
      waitForButtonPress = false;  // Button has been pressed, reset the flag
      lastDetectionMillis = millis();  // Reset the timer
      digitalWrite(relayPin, HIGH);
      delay(50);

      
     
      Serial.println("MACHINE ISSUE(MACHINE TURNED ON)");
      
       
       lcd.setCursor(0, 1);
       lcd.print("                ");
       lcd.setCursor(0,1);
       lcd.print("ON");
    } else if (digitalRead(buttonPin3) == LOW) {
      waitForButtonPress = false;  // Button has been pressed, reset the flag
      lastDetectionMillis = millis();  // Reset the timer
      digitalWrite(relayPin, HIGH);
      delay(50);

      
      Serial.println("PRINT ISSUE(MACHINE TURNED ON)");
       lcd.setCursor(0, 1);
       lcd.print("                ");
       lcd.setCursor(0,1);
       lcd.print("ON");

    


     } else if (digitalRead(buttonPin5) == LOW) {  
  waitForButtonPress = false;   
  lastDetectionMillis = millis();  // Reset the timer  /// delete if no good to the bottom line.
      digitalWrite(relayPin, HIGH);
      delay(50);
      
      
    Serial.println("JOB STARTED");       // delete if no good
    lcd.setCursor(0, 1);
      lcd.print("JOB STARTED          ");
      totalTime = 0;
      lastPrintTime = millis(); 
      lcd.setCursor(0, 0);
      lcd.print("PART:     ");
      count = 0;}
    
  } else {
    // Check if the sensor has been continuously in the HIGH state for more than 10 seconds
    if (sensorValue == photoeyeThreshold) {
      // If 1 state hasn't been detected in the last 10 seconds, trigger the relay
      unsigned long currentMillis = millis();
      if (currentMillis - lastDetectionMillis >= interval) {
        digitalWrite(relayPin, LOW);
       
        lcd.setCursor(0, 1);
       lcd.print("                ");
       
        lcd.setCursor(1, 1);
        lcd.print("WHAT HAPPENED?");

        waitForButtonPress = true;  // Set the flag to wait for button press

        // Reset the timer
        lastDetectionMillis = currentMillis;
      }
    } else {
      // Reset the timer if 1 state is detected
      lastDetectionMillis = millis();
    }
  }

  if (!digitalRead(photoeyePin) && state) {  
    count++;  
    state = false;  
     
    lcd.setCursor(5, 0);  
    lcd.print(count);  
    delay(500);
  }  
  if (digitalRead(photoeyePin)) {  
    state = true;  
    delay(400);
  }
}