#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
//#include <TimerOne.h>

// Define the connections between the keypad and Arduino
const byte ROWS = 4; // Number of rows on the keypad
const byte COLS = 4; // Number of columns on the keypad
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'.', '0', '#', 'D'}
};
byte rowPins[ROWS] = {9, 8, 7, 6};    // Connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 4, 3, 2};    // Connect to the column pinouts of the keypad

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

const int motorPin = 10;               // PWM pin connected to the motor driver input
const int potPin = A0;                // Analog input pin connected to the potentiometer
const int limitPotPin = A1;           // Analog input pin connected to the limit potentiometer
const int motorEnablePin = 5;         // Digital pin connected to the ENA pin of the motor driver
const int motorStopThreshold = 200;   // Threshold value to stop the motor (adjust as needed)
double  volume = 0;
const int buzzerPin = 11;  // Digital pin connected to the buzzer

// LCD module settings
//const int lcdColumns = 16; // Number of LCD columns
//const int lcdRows = 2;     // Number of LCD rows
//const int lcdAddr = 0x27;  // I2C address of the LCD module
LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

//LiquidCrystal_I2C lcd(lcdAddr, lcdColumns, lcdRows);

String flowRate = ""; // Variable to store the entered flow rate

float syringeValue = 5.00; // syringe value 100 ML


void setup() {
  Serial.begin(9600);
  // Initialize LCD module
  lcd.init();  
 // lcd.begin(16,2);
  lcd.setBacklight(HIGH); // Turn on the backlight
  // Create comma character
  pinMode(motorPin, OUTPUT);
  pinMode(motorEnablePin, OUTPUT);
  pinMode(potPin, INPUT);
  pinMode(buzzerPin, OUTPUT);

  lcd.setCursor(0, 0);
  lcd.print("Welcome");
  lcd.setCursor(0, 1);
  delay(2000);
}

void loop() {
  //lcd.clear();
  char key = keypad.getKey();
  lcd.setCursor(0, 0);
  lcd.print("Syringe Val:");
  lcd.print(syringeValue);
  lcd.setCursor(0, 1);
  lcd.print("B kybrd | A Pot");
  // Read the keypad input
  if (key != NO_KEY) {
    flowType(key);
  }
}



void program (double myFlow) {
  double potValue = 1023.00;
  Serial.println(potValue);
  // Read potentiometer value (0-1023)
  double motorSpeed = map(potValue, 0.00, 1023.00, 0.00, 255.00); // Map potentiometer value to motor speed (0-255)
  // Read limit potentiometer value (0-1023)
  volume += ((myFlow * 1023.0) / 5.0);
  Serial.println(volume);
  delay(100);

  while (true) {
    analogWrite(motorPin, motorSpeed);
    double limitPotValue = analogRead(limitPotPin);
    Serial.println(limitPotValue);
    //delay(100);
    if (limitPotValue >= volume ) {
      digitalWrite(motorPin, LOW);
      //volume += volume;
      break;
      digitalWrite(buzzerPin, HIGH);  // Turn on the buzzer
      delay(500);                     // Delay for the sound duration (adjust as needed)
      digitalWrite(buzzerPin, LOW);   // Turn off the buzzer
    }

  }
}


void flowType(char key) {
  if (key == 'A') {
    lcd.clear();
    lcd.print("Pot Value :");
    bool a_state = true;
    while (a_state) {
      char key = keypad.getKey();
      while (a_state) {
        char key = keypad.getKey();
        flowRate = (analogRead(potPin) / 1023.00) * 5.00;
        double myFlow = flowRate.toDouble();
        lcd.setCursor(0, 1);
        lcd.print(myFlow);
        if (key == '#') {
          flowRate = "";
          while (true) {
            //Serial.println(myFlow);
            syringeValue -= myFlow;
            program (myFlow);
            myFlow = 0.0;
            a_state = false;
            break;
          }
        }

      }
    }
  }
  if (key == 'B') {
    lcd.clear();
    lcd.print("KeyPad Value :");
    bool b_state = true;
    while (b_state) {
      char key = keypad.getKey();
      if (key != NO_KEY) {
        if (key == 'D') {
          // Delete the last entered digit
          if (flowRate.length() > 0) {
            flowRate = flowRate.substring(0, flowRate.length() - 1);
            lcd.setCursor(0, 1);
            double myFlow = flowRate.toDouble();
            lcd.print(myFlow);
          }
        } else {
          flowRate += key;
          lcd.setCursor(0, 1);
          double myFlow = flowRate.toDouble();
          lcd.print(myFlow);
          if (key == '#') {
            flowRate = "";
            while (true) {
              //Serial.println(myFlow);
              syringeValue -= myFlow;
              program (myFlow);
              myFlow = 0.0;
              b_state = false;
              break;
            }
          }
        }
      }
    }
  }
}