#include <LiquidCrystal_I2C.h>

int button0 = 2;
int button1 = 3;
int button2 = 4;
int button3 = 5;
int button4 = 6;

int hcsr04_trigger_pin = 9;
int hcsr04_echo_pin = 10;
long hcsr04Duration;
int hcsr04Distance;

int relay = 11;

int buzzer = 7;

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

float amount;
const unsigned long keySampleIntervalMs = 25;
byte longKeyPressCount = 0;
float releasedAmount;
String _releasedAmount;

void setup() 
{
  pinMode(button0, INPUT);
  pinMode(button1, INPUT);
  pinMode(button2, INPUT);
  pinMode(button3, INPUT);
  pinMode(button4, INPUT);

  pinMode(hcsr04_trigger_pin, OUTPUT);
  pinMode(hcsr04_echo_pin, INPUT);

  pinMode(relay, OUTPUT);
  pinMode(buzzer, OUTPUT);

  lcd.init();
  lcd.backlight();
}

void loop() 
{
  lcd.setCursor(0,0);
  lcd.print("ZekiDamacanaoglu");
  lcd.setCursor(0,1);
  lcd.print("Su bizim isimiz!");
  delay(100);

  checkPush(button0);
  checkPush(button1);
  checkPush(button2);
  checkPush(button3);
  checkPush(button4);

}

void checkPush(int buttonPushed)
{
  int result;
  int buttonActive = digitalRead(buttonPushed);
  if(buttonActive == HIGH)
  {
    lcd.clear();
    int _buttonPushed = buttonPushed - 1;
    switch (_buttonPushed)
    {
      case 1:
        amount = 5200;
        result = checkJug(false);
        buzzerResult(result);
        lcd.clear();
        break;
      case 2:
        amount = 1500;
        result = checkJug(false);
        buzzerResult(result);
        lcd.clear();
        break;
      case 3:
        amount = 2000;
        result = checkJug(false);
        buzzerResult(result);
        lcd.clear();
        break;
      case 4:
        amount = 3000;
        result = checkJug(false);
        buzzerResult(result);
        lcd.clear();
        break;
      case 5:
        result = checkJug(true);
        while (digitalRead(6) == HIGH)
        {
          switch(result)
          {
            case 0:
              lcd.setCursor(0,0);
              lcd.print("Dur hele dur");
              lcd.setCursor(0,1);
              lcd.print("Bak ne diyecegim");
              break;
            case 1:
              releasedAmount = (6.67 * longKeyPressCount);
              _releasedAmount = String(releasedAmount);
              lcd.setCursor(0,0);
              lcd.print(_releasedAmount + "ml su");
              lcd.setCursor(0,1);
              lcd.print("bosaltiliyor...");
              digitalWrite(relay, HIGH);
              longKeyPressCount++;
              break;
            default:
              break;
          }
        }
        digitalWrite(relay, LOW);
        buzzerResult(result);
        delay(500);
        lcd.clear();
        break;
    }
  }
  else
  {
  }

}

int checkJug(bool contRelease)
{
  int hcsr04Result;
  digitalWrite(hcsr04_trigger_pin, LOW);
  delayMicroseconds(2);
  digitalWrite(hcsr04_trigger_pin, HIGH);
  delayMicroseconds(10);
  digitalWrite(hcsr04_trigger_pin, LOW);
  hcsr04Duration = pulseIn(hcsr04_echo_pin, HIGH);
  hcsr04Distance = hcsr04Duration * 0.034 / 2;
  if(hcsr04Distance <= 20)
  {
    hcsr04Result = 1;
    if(contRelease == false)
    {
      waterRelease(amount);
    }
  }
  else if(hcsr04Distance > 20)
  {
    hcsr04Result = 0;
  }
  else
  {
    lcd.setCursor(0,0);
    lcd.print("Hata");
    lcd.setCursor(0,1);
    lcd.print("UltrasonikSensor");
    delay(1000000000);
  }

  return hcsr04Result;
}

void waterRelease(int amount)
{ 
  //float releasedAmount = round(0.0667 * amount);
  releasedAmount = (0.0667 * amount);
  _releasedAmount = String(releasedAmount);
  lcd.setCursor(0,0);
  lcd.print(_releasedAmount + "ml su");
  lcd.setCursor(0,1);
  lcd.print("bosaltiliyor");
    digitalWrite(relay, HIGH);
    delay(amount);
    digitalWrite(relay, LOW);
    delay(500);
}

void buzzerResult(int result)
{
  switch (result)
  {
    case 0:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("Nereye dokeyim?");
      lcd.setCursor(0,1);
      lcd.print("");
      delay(500);
      lcd.setCursor(0,0);
      lcd.print("Nereye dokeyim?");
      lcd.setCursor(0,1);
      lcd.print("Masaya mi???");
      for (int i = 1; i <= 5; i++) 
      {
        tone(buzzer, 200, 25);
        delay(80);
        noTone(buzzer);
        delay(80);
      }
      delay(1000);
      break;
    case 1:
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print(_releasedAmount +"ml su ");
      lcd.setCursor(0,1);
      lcd.print("Afiyet olsun!");
      tone(buzzer, 200, 500);
      delay(3000);
      noTone(buzzer);
      longKeyPressCount = 0;
      break;
    default:
      lcd.setCursor(0,0);
      lcd.print("Hata!!!");
      lcd.setCursor(0,1);
      lcd.print("Buzzer|Result");
      break;
  }
}