#include "HX711_ADC.h"
#include <LiquidCrystal.h>

HX711_ADC LoadCell(5, 6); // Ubah pin untuk LoadCell
LiquidCrystal lcd(A0, A1, A2, A3, A4, A5);

const int buzzer = 11;
const int button1 = 2;
const int button2 = 3;
const int button3 = 4;
const int button4 = 5;
const int taree = 7; // Ubah pin untuk tare

int num = 1;
float alarm1 = 0;
float alarm2 = 0;
const float z1 = 28.3495;

unsigned long prevTime1 = millis();
unsigned long prevTime2 = millis();
const long Time1 = 3000;
const long Time2 = 1000;

void setup() {
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(button3, INPUT_PULLUP);
  pinMode(button4, INPUT_PULLUP);
  pinMode(buzzer, OUTPUT);
  pinMode(taree, INPUT_PULLUP);

  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.setCursor(1, 0);
  lcd.print("Weighing Scale");
  lcd.setCursor(3, 1);
  lcd.print("With Alarm");
  delay(2500);
  lcd.clear();
  delay(150);
  lcd.setCursor(3, 0);
  lcd.print("Taring");
  delay(1000);
  lcd.clear();

  LoadCell.begin();
  LoadCell.start(1000);
  LoadCell.setCalFactor(0.42); // Kalibrasi
}

void loop() {
  unsigned long currentTime = millis();
  static unsigned long currentTime1 = millis();
  
  LoadCell.update();
  float i = LoadCell.getData();
  float z = i / z1;

  if (digitalRead(button3) == LOW) {
    alarm1 = 0;
    alarm2 = 0;
    lcd.clear();
  }


  int buttonState = digitalRead(button2);
  int buttonState1 = digitalRead(button1);

  if (buttonState == LOW || buttonState1 == LOW) {
    currentTime1 = millis();
  }

  switch (num) {
    case 1: {
      if (millis() - currentTime1 >= 4000) {
        num = 1;
      }
      break;
    }
    case 2: {
      if (digitalRead(button1) == LOW) {
        alarm1 += 1;
        delay(75);
      } else if (digitalRead(button2) == LOW) {
        alarm1 -= 1;
        delay(75);
      }
      if (digitalRead(button3) == LOW) {
        alarm1 = 0;
      }
      lcd.setCursor(1, 0);
      lcd.print("Set for Gram");
      lcd.setCursor(0, 1);
      lcd.print(alarm1, 0);
      lcd.print("g ");
      alarm2 = alarm1 / z1;
      lcd.setCursor(9, 1);
      lcd.print(alarm2, 1);
      lcd.print("oz ");
      if (millis() - currentTime1 >= 8000) {
        num = 1;
        lcd.clear();
        lcd.setCursor(1, 0);
        lcd.print("Weighing Scale");
        delay(500);
        lcd.clear();
      }
      break;
    }
    case 3: {
      if (digitalRead(button1) == LOW) {
        alarm2 += 1;
        delay(75);
      } else if (digitalRead(button2) == LOW) {
        alarm2 -= 1;
        delay(75);
      }
      lcd.setCursor(1, 0);
      lcd.print("Set for Ounce");
      lcd.setCursor(0, 1);
      lcd.print(alarm1, 0);
      lcd.print("g  ");
      alarm1 = alarm2 * z1;
      lcd.setCursor(9, 1);
      lcd.print(alarm2, 1);
      lcd.print("oz ");
      if (digitalRead(button3) == LOW) {
        alarm2 = 0;
      }
      if (millis() - currentTime1 >= 4000) {
        num = 1;
        lcd.clear();
        lcd.setCursor(1, 0);
        lcd.print("Weighing Scale");
        delay(500);
        lcd.clear();
      }
      break;
    }
  }

  if (digitalRead(button4) == LOW) {
    if (num > 2) {
      num = 1;
    } else {
      num++;
    }
    currentTime1 = millis();
    delay(300);
    lcd.clear();
    delay(300);
  }

  if (currentTime - prevTime1 > Time1) {
    if (i > alarm1 && alarm1 > 0) {
      noTone(buzzer);
      delay(300);
      tone(buzzer, 250);
      delay(300);
      noTone(buzzer);
      delay(300);
      tone(buzzer, 450);
      delay(300);
      noTone(buzzer);
      delay(300);
    }
    prevTime1 = currentTime;
  }

  if (i < -0.9) {
    i = i;
  } else if (-0.9 < i && i < 0.1) {
    i = 0;
  }

  if (currentTime - prevTime2 > Time2) {
    if (i >= 3000 && num < 4) {
      lcd.clear();
      delay(500);
      num = 4;
    } else if (num == 4 && i < 3000) {
      num = 1;
      lcd.clear();
      delay(1000);
    }
    if (num == 1) {
      lcd.setCursor(1, 0);
      lcd.print("Weighing Scale");
      lcd.setCursor(0, 1);
      lcd.print(i, 0);
      lcd.print("g  ");
      lcd.setCursor(9, 1);
      lcd.print(z, 1);
      lcd.print("oz ");
    }
    prevTime2 = currentTime;
    if (num == 4) {
      lcd.setCursor(0, 0);
      lcd.print("  Over Loaded   ");
      delay(500);
      lcd.clear();
      delay(500);
    }
  }

  Serial.print(currentTime);
  Serial.print("    ");
  Serial.print(millis());
  Serial.print("    ");
  Serial.print(prevTime2);
  Serial.println("    ");
}