#include <Wire.h>
#include <LiquidCrystal_I2C.h>


LiquidCrystal_I2C lcd(0x27, 16, 2);

#define encoderClk 2
#define encoderDt 4
#define encoderSw 3
int encoderPos = 0;
int encoderLast = 0;
bool encoderChanged = false;
bool encoderButtonPressed = false;
bool rotated = true;         //info of the rotation
bool ButtonPressed = false;  //info of the button

int ButtonCounter = 0;  //counts the button clicks
int RotateCounter = 0;  //counts the rotation clicks

int rotateMenuSayac=4;

//Statuses
int CLKNow;
int CLKPrevious;
int DTNow;
int DTPrevious;


// Timers
float TimeNow1;
float TimeNow2;

//statuses (1/true: ON, 0/false: OFF)
bool whiteLEDStatus = false;
bool blueLEDStatus = false;
bool greenLEDStatus = false;
bool yellowLEDStatus = false;
bool redLEDStatus = false;

int saat, dakika, saniye;
unsigned long son_saniye = millis();
long bir_saniye = 1000;

//https://maxpromer.github.io/LCD-Character-Creator/
byte CursorIcon[8] = {B10000, B01000, B00100, B00010, B00010, B00100, B01000, B10000}; // >
byte CheckIcon[8] = {B00000, B00000, B00001, B00011, B10110, B11100, B11000, B00000}; // ✓
byte CheckBoxIcon[8] = {B11111, B10000, B10001, B00011, B10110, B11101, B01001, B11111}; // 🗹
byte UncheckBoxIcon[8] = {B11111, B10001, B10001, B10001, B10001, B10001, B10001, B11111}; //☐

int menu = 0;


void setup() {
  Serial.begin(9600);
  // RTC_DS1302.setDS1302Time(00, 32, 23, 6, 24, 01, 2023);  // İlk zaman ayarı
  Wire.begin();
  lcd.begin(16, 2);
  lcd.backlight();
  pinMode(encoderClk, INPUT_PULLUP);
  pinMode(encoderDt, INPUT_PULLUP);
  pinMode(encoderSw, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(encoderClk), rotate, CHANGE);
  attachInterrupt(digitalPinToInterrupt(encoderSw), buttonPressed, FALLING);
  TimeNow1 = millis();   //Start timer 1
  lcd.setCursor(13, 0);  // Defining positon to write from second row, first column .
  lcd.print(RotateCounter);

  lcd.createChar(0, CursorIcon);
  lcd.setCursor(12, 0);
  lcd.write(byte(0));
  updateMenu();
}

void loop() {
  unsigned long currentTime = millis();

  if (currentTime - son_saniye > bir_saniye) {
    //saatiGuncelle();
    son_saniye = currentTime;
  }
  ButtonChecker();
  lcd.setCursor(13, 0);  // Defining positon to write from second row, first column .
  lcd.print(RotateCounter);

  if(menu!=RotateCounter){
  menu = RotateCounter;
   updateMenu();
  }
  // updateMenu();
}


void buttonPressed() {
  //This timer is a "software debounce". It is not the most effective solution, but it works
  TimeNow2 = millis();
  if (TimeNow2 - TimeNow1 > 500) {
    ButtonPressed = true;
  }
  TimeNow1 = millis();  //"reset" timer; the next 500 ms is counted from this moment
}

void rotate() {

  CLKNow = digitalRead(encoderClk);  //Read the state of the CLK pin
  // If last and current state of CLK are different, then a pulse occurred
  if (CLKNow != CLKPrevious && CLKNow == 1) {
    // If the DT state is different than the CLK state then
    // the encoder is rotating CCW so increase
    if (digitalRead(encoderDt) != CLKNow) {
      RotateCounter++;
      if (RotateCounter > rotateMenuSayac) {
        RotateCounter = 0;
      }
    } else {
      RotateCounter--;
      if (RotateCounter < 0) {
        RotateCounter = rotateMenuSayac;
      }
    }
  }
  CLKPrevious = CLKNow;  // Store last CLK state
  rotated = true;
  
}

/*
  void saatiGuncelle() {
  RTC_DS1302.updateTime();  //RTC den zaman bilgisini oku
  // Serial.print("Tarih: ");
  // Serial.print(RTC_DS1302.dayofmonth);
  // Serial.print("/");
  // Serial.print(RTC_DS1302.month);
  // Serial.print("/");
  // Serial.print(RTC_DS1302.year);
  // Serial.print(" Saat: ");
  // Serial.print(RTC_DS1302.hours);
  // Serial.print(":");
  // Serial.print(RTC_DS1302.minutes);
  // Serial.print(":");
  // Serial.println(RTC_DS1302.seconds);
  saat = RTC_DS1302.hours;
  dakika = RTC_DS1302.minutes;
  saniye = RTC_DS1302.seconds;
  saatiEkranaYazdir(saat, dakika, saniye);
  }

  void saatiEkranaYazdir(int saat, int dakika, int saniye) {

  lcd.setCursor(0, 0);
  lcd.print(saat, DEC);
  lcd.print(":");
  lcd.print(dakika, DEC);
  lcd.print(":");
  lcd.print(saniye, DEC);
  lcd.setCursor(0, 1);
  }
*/


void ButtonChecker()  //this is basically the menu part. keep track of the buttonpressed and rotatecounter for navigation
{
  if (ButtonPressed == true) {
    Serial.print("RotateCounter: ");
    Serial.println(RotateCounter);
    lcd.setCursor(13, 0);  // Defining positon to write from second row, first column .
    lcd.print(RotateCounter);
    executeAction();
    //updateMenu();

  }
  ButtonPressed = false;  //reset this variable
}

void updateMenu() {
  switch (menu) {
    case 0:
      menu = 0;
       lcd.clear();
      lcd.print("Saat");
      break;
    case 1:
      lcd.clear();
      lcd.print(">Aile Saati");
      lcd.setCursor(0, 1);
      lcd.print(" Sure");
      break;
    case 2:
      lcd.clear();
      lcd.print(" Aile Saati");
      lcd.setCursor(0, 1);
      lcd.print(">Sure");
      break;
    case 3:
      lcd.clear();
      lcd.print(">Kapak Ac");
      lcd.setCursor(0, 1);
      lcd.print(" Baslat");
      break;
    case 4:
      lcd.clear();
      lcd.print(" Kapak Ac");
      lcd.setCursor(0, 1);
      lcd.print(">Baslat");
      break;
    case 5:
      menu = rotateMenuSayac;
      break;
  }
}

void executeAction() {
  switch (menu) {
    case 1:
      action1();
      break;
    case 2:
      action2();
      break;
    case 3:
      action3();
      break;
    case 4:
      action4();
      break;
  }
}

void action1() {
  rotateMenuSayac=11;
  menu=11;
  lcd.clear();
  lcd.print("Baslangic Zamani");
  lcd.setCursor(0, 1);
  lcd.print("00:00");
  delay(1500);
}
void action2() {
  lcd.clear();
  lcd.print(">Executing #2");
  delay(1500);
}
void action3() {
  lcd.clear();
  lcd.print(">Executing #3");
  delay(1500);
}
void action4() {
  lcd.clear();
  lcd.print(">Kapak Kapaniyor");
  RotateCounter=0;
  delay(1500);
}