#include <LiquidCrystal_I2C.h>
#include <RTClib.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
RTC_DS1307 rtc;

// לחצנים
#define BTN_SET 4
#define BTN_UP 3
#define BTN_DOWN 5
#define BTN_CONTROL 2
#define BTN_END 10

// זמן נוכחי
int h = 0, m = 0, s = 0;

// זמן השכמה
int alarmH = 7, alarmM = 0;
int wakeBefore = 0;
int setState = 0;

// ניהול לחיצה ארוכה
unsigned long lastActionTime = 0;
unsigned long repeatDelay = 400;
unsigned long repeatRate = 150;

// ניהול סאונדים
bool alarmTriggered = false;
bool song1Started = false;
bool song2Started = false;
bool song3Started = false;
bool song4Started = false;
bool song5Started = false;
int currentSong = 0;
unsigned long songStartTime = 0;

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);

  pinMode(BTN_SET, INPUT_PULLUP);
  pinMode(BTN_UP, INPUT_PULLUP);
  pinMode(BTN_DOWN, INPUT_PULLUP);
  pinMode(BTN_CONTROL, INPUT_PULLUP);
  pinMode(BTN_END, INPUT_PULLUP);

  rtc.begin();
  if (!rtc.isrunning()) {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}

void loop() {
  DateTime now = rtc.now();
  h = now.hour();
  m = now.minute();
  s = now.second();

  int nowMin = h * 60 + m;
  int alarmMin = alarmH * 60 + alarmM;
  int startMin = alarmMin - wakeBefore;

  // 1. זמן השכמה הגיע
  if (!alarmTriggered && nowMin == alarmMin) {
    alarmTriggered = true;
    songStartTime = millis();

    if (digitalRead(BTN_CONTROL) == LOW) {
      startSong(1);
    }
  }

  // 2. התחלה אוטומטית של שיר 1 אחרי 10 שניות אם לא נלחץ כפתור
  if (alarmTriggered && !song1Started && millis() - songStartTime >= 10000) {
    startSong(1);
  }

  // 3. מעבר משיר 1 לשיר 2
  if (currentSong == 1 && song1Started) {
    if (digitalRead(BTN_CONTROL) == LOW) {
      startSong(2);
    } else if (millis() - songStartTime >= 10000) {
      startSong(2);
    }
  }

  // 4. מעבר משיר 2 לשיר 3 או 4
  if (currentSong == 2 && song2Started) {
    if (digitalRead(BTN_CONTROL) == LOW) {
      startSong(3);
    } else if (millis() - songStartTime >= 10000) {
      startSong(4);
    }
  }

  // 5. שיר 3/4 – מעבר לשיר 5 עם כפתור סיום
  if ((currentSong == 3 || currentSong == 4) && (song3Started || song4Started)) {
    if (digitalRead(BTN_END) == LOW) {
      startSong(5);
    }
  }

  // תפריט הגדרות
  if (digitalRead(BTN_SET) == LOW) {
    delay(200);
    setState++;
    if (setState > 4) setState = 0;
  }

  if (setState == 1) {
    updateWithHold(alarmH, 0, 23);
  } else if (setState == 2) {
    updateWithHold(alarmM, 0, 59);
  } else if (setState == 3) {
    updateWithHold(wakeBefore, 0, 59);
  }

  // LCD שורה 1
  lcd.setCursor(0, 0);
  if (setState == 0) {
    lcd.print("Set alarm          ");
  } else if (setState == 1) {
    lcd.print("Set hour: ");
    printTwoDigits(alarmH); lcd.print("      ");
  } else if (setState == 2) {
    lcd.print("Set min:  ");
    printTwoDigits(alarmM); lcd.print("      ");
  } else if (setState == 3) {
    lcd.print("Set awake: ");
    lcd.print(wakeBefore); lcd.print("m     ");
  } else if (setState == 4) {
    lcd.print("Alarm ");
    printTwoDigits(alarmH); lcd.print(":");
    printTwoDigits(alarmM); lcd.print(", ");
    lcd.print(wakeBefore); lcd.print("m ");
  }

  // LCD שורה 2 – שעה נוכחית
  lcd.setCursor(0, 1);
  lcd.print("Time ");
  printTwoDigits(h); lcd.print(":");
  printTwoDigits(m); lcd.print(":");
  printTwoDigits(s);
  lcd.print("       ");

  delay(100);
}

// שינוי ערכים עם לחיצה ארוכה
void updateWithHold(int &value, int minVal, int maxVal) {
  static bool wasUpHeld = false;
  static bool wasDownHeld = false;
  static unsigned long lastRepeatTime = 0;

  if (digitalRead(BTN_UP) == LOW) {
    if (!wasUpHeld) {
      lastActionTime = millis();
      value = (value + 1 > maxVal) ? minVal : value + 1;
      wasUpHeld = true;
    } else if (millis() - lastActionTime > repeatDelay && millis() - lastRepeatTime > repeatRate) {
      value = (value + 1 > maxVal) ? minVal : value + 1;
      lastRepeatTime = millis();
    }
  } else {
    wasUpHeld = false;
  }

  if (digitalRead(BTN_DOWN) == LOW) {
    if (!wasDownHeld) {
      lastActionTime = millis();
      value = (value - 1 < minVal) ? maxVal : value - 1;
      wasDownHeld = true;
    } else if (millis() - lastActionTime > repeatDelay && millis() - lastRepeatTime > repeatRate) {
      value = (value - 1 < minVal) ? maxVal : value - 1;
      lastRepeatTime = millis();
    }
  } else {
    wasDownHeld = false;
  }
}

// הדפסת מספר עם אפס מוביל
void printTwoDigits(int number) {
  if (number < 10) lcd.print("0");
  lcd.print(number);
}

// התחלת שיר
void startSong(int songNum) {
  currentSong = songNum;
  songStartTime = millis();

  switch (songNum) {
    case 1:
      song1Started = true;
      Serial.println("🎵 Play rustling leaves sound");
      break;
    case 2:
      song2Started = true;
      Serial.println("🎵 Play bird chirping sound");
      break;
    case 3:
      song3Started = true;
      Serial.println("🎵 Play harp sound melody");
      break;
    case 4:
      song4Started = true;
      Serial.println("🎵 Play beeping truck reverse sound");
      break;
    case 5:
      song5Started = true;
      Serial.println("🎵 Playing 'Happy' – motion detected");
      break;
  }
}