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

#include "RTClib.h"

RTC_DS1307 rtc;


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;

//aLARM AYAR
int alarmSaat = 0;
int alarmDakika = 0;


// 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;


bool menuAktif = false;

//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;
int altmenu = 0;
boolean updateScreen = false;

/*String menuItems[]={"Saat","Aile Saati","Sure","Baslat","Kapak Ac"};
  String alt_menu[][3]={{"","",""},{"Bas Saat","",""},{"30","45","60"}};*/

void setup() {
  Serial.begin(9600);
  // RTC_DS1302.setDS1302Time(00, 32, 23, 6, 24, 01, 2023);  // İlk zaman ayarı
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    // When time needs to be set on a new device, or after a power loss, the
    // following line sets the RTC to the date & time this sketch was compiled
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // This line sets the RTC with an explicit date & time, for example to set
    // January 21, 2014 at 3am you would call:
    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
  }
  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.createChar(0, CursorIcon);
  lcd.setCursor(12, 0);
  lcd.write(byte(0));


  updateMenu();
}

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

  if ((currentTime - son_saniye > bir_saniye) && menuAktif == false) {
    saatiGuncelle();
    son_saniye = currentTime;
  }
  ButtonChecker();

}


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 (CLKNow != CLKPrevious && CLKNow == 1) {
    if (digitalRead(encoderDt) != CLKNow) {
      Yukari();
    } else {
      Asagi();
    }
  }
  CLKPrevious = CLKNow;  // Store last CLK state
  rotated = true;
}

void Yukari() {
  if (altmenu == 0) {
    RotateCounter++;
    if (RotateCounter > rotateMenuSayac) {
      RotateCounter = 0;
    }
    menu = RotateCounter;
  }
  else if (altmenu == 1) {

    alarmSaat++;
    alarmSaat %= 24;
  }
  else if (altmenu == 2) {

    alarmDakika += 5;
    alarmDakika %= 60;
  }

  updateScreen = true;
}
void Asagi() {
  if (altmenu == 0) {
    RotateCounter--;
    if (RotateCounter < 0) {
      RotateCounter = rotateMenuSayac;
    }
    menu = RotateCounter;
  }
  else if (altmenu == 1) {

    alarmSaat--;
    if (alarmSaat < 0)alarmSaat += 24;
    alarmSaat %= 24;
  }
  else if (altmenu == 2) {

    alarmDakika -= 5;
    if (alarmDakika < 0)alarmDakika += 60;
    alarmDakika %= 60;
  }
  updateScreen = true;
}


void saatiGuncelle() {
  DateTime time = rtc.now();
  // 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);
  //Full Timestamp
  //Serial.println(String("DateTime::TIMESTAMP_TIME:\t")+time.timestamp(DateTime::TIMESTAMP_TIME));

  //saatiEkranaYazdir(time.timestamp(DateTime::TIMESTAMP_TIME));

  saatiEkranaYazdir(time);
}

void saatiEkranaYazdir(DateTime time) {

  lcd.setCursor(0, 1);
  lcd.print(time.timestamp(DateTime::TIMESTAMP_TIME));
  lcd.setCursor(0, 0);
  lcd.print(time.timestamp(DateTime::TIMESTAMP_DATE));


}



void ButtonChecker()  //this is basically the menu part. keep track of the buttonpressed and rotatecounter for navigation
{
  lcd.setCursor(14, 1);  // Defining positon to write from second row, first column .
  lcd.print(RotateCounter);
  if (updateScreen) {
    updateScreen = false;
    updateMenu();
  }
  if (ButtonPressed == true) {
    Serial.print("RotateCounter: ");
    Serial.println(RotateCounter);
    updateScreen = true;
    executeAction();
  }
  ButtonPressed = false;  //reset this variable
}

void updateMenu() {
  if (altmenu == 0) {
    switch (menu) {
      case 0:
        menu = 0;
        menuAktif = false;
        lcd.clear();
        lcd.print("Saat");
        break;
      case 1:
        lcd.clear();
        menuAktif = true;
        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:
        menuAktif = true;
        lcd.clear();
        lcd.print(" Kapak Ac");
        lcd.setCursor(0, 1);
        lcd.print(">Baslat");
        break;
      case 5:
        menu = rotateMenuSayac;
        break;
    }

  }
  else if (altmenu == 1 || altmenu == 2) {
    Serial.print("altmenu->");
    Serial.println(altmenu);
    action1();
  }
  else if (altmenu == 3) {
    menuAktif = true;
        lcd.clear();
        lcd.print("> Kaydet ve Cik");
        lcd.setCursor(0, 1);
        lcd.print(" Iptal");
  }
   else if (altmenu == 4) {
    menuAktif = true;
        lcd.clear();
        lcd.print(" Kaydet ve Cik");
        lcd.setCursor(0, 1);
        lcd.print("> Iptal");
  }



}

void executeAction() {
  if (altmenu == 0) {
    switch (menu) {
      case 1:
        altmenu = 1;
        action1();
        break;
      case 2:
        action2();
        break;
      case 3:
        action3();
        break;
      case 4:
        action4();
        break;
    }
  }
  else if (altmenu == 1 || altmenu == 2) {
    altmenu++;
    altmenu %= 4;
    Serial.println(String(altmenu));
    action1();
  }


}

void action1() {

  lcd.clear();
  lcd.print("Baslangic Zamani");
  altmenu == 1 ? lcd.setCursor(0, 1) : lcd.setCursor(6, 1);
  altmenu == 1 ? lcd.print(">") : lcd.print("<");
  lcd.setCursor(1, 1);
  String saat=String(alarmSaat).length() == 1 ? "0" + String(alarmSaat) : String(alarmSaat);
  String dakika=String(alarmDakika).length() == 1 ? "0" + String(alarmDakika) : String(alarmDakika);
  lcd.print(saat+ ":" + dakika);
  //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);
}