#include <Wire.h>
#include <RTClib.h>
#include <DHT.h>
#include <TM1637Display.h>

// تعریف پین‌ها
#define CLK 9
#define DIO 8
#define DHTPIN 5
#define DHTTYPE DHT22
#define MODE_BUTTON 2
#define UP_BUTTON 3
#define DOWN_BUTTON 4

// تعریف شیء‌ها
RTC_DS1307 rtc;
DHT dht(DHTPIN, DHTTYPE);
TM1637Display display(CLK, DIO);

// متغیرهای زمان و دما
int hours = 0, minutes = 0, seconds = 0;
float temperature = 0;

// متغیرهای حالت
bool showTemp = false;
bool settingMode = false;
bool fixedTimeDisplay = false; 
int settingStep = 0;
unsigned long lastUpdate = 0;
unsigned long lastButtonPress = 0;
unsigned long modePressStart = 0; 
DateTime now;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  rtc.begin();
  dht.begin();
  display.setBrightness(0x0a);

  pinMode(MODE_BUTTON, INPUT_PULLUP);
  pinMode(UP_BUTTON, INPUT_PULLUP);
  pinMode(DOWN_BUTTON, INPUT_PULLUP);

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

void loop() {
  unsigned long currentMillis = millis();
  now = rtc.now();
  hours = now.hour();
  minutes = now.minute();
  seconds = now.second();

  // تبدیل ساعت به ۱۲ ساعته
  if (hours >= 12) {
    if (hours > 12) hours -= 12;
  }
  if (hours == 0) hours = 12;

  // خواندن دما هر ۵ ثانیه
  if (currentMillis - lastUpdate >= 5000) {
    temperature = dht.readTemperature();
    lastUpdate = currentMillis;
    showTemp = !showTemp;
  }

  // نمایش ساعت یا دما
  if (fixedTimeDisplay) {
    display.showNumberDecEx(hours * 100 + minutes, 0b01000000, true);
  } else {
    if (!settingMode) {
      if (showTemp) {
        int tempDisplay = (int)(temperature * 10);
        display.showNumberDecEx(tempDisplay, 0b00100000, true);
      } else {
        display.showNumberDecEx(hours * 100 + minutes, 0b01000000, true);
      }
    } else {
      handleSetting();
    }
  }

  checkButtons();

  // خروج خودکار از تنظیمات بعد از ۵ ثانیه
  if (settingMode && (currentMillis - lastButtonPress >= 5000)) {
    settingMode = false;
    rtc.adjust(DateTime(now.year(), now.month(), now.day(), hours, minutes, 0));
    settingStep = 0;
  }
}

void checkButtons() {
  static int lastModeButtonState = HIGH;
  static int lastUpButtonState = HIGH;
  static int lastDownButtonState = HIGH;
  
  int modeButtonState = digitalRead(MODE_BUTTON);
  int upButtonState = digitalRead(UP_BUTTON);
  int downButtonState = digitalRead(DOWN_BUTTON);
  unsigned long currentMillis = millis();

  // بررسی نگه داشتن دکمه MODE برای ۳ ثانیه
  if (modeButtonState == LOW) {
    if (modePressStart == 0) { 
      modePressStart = currentMillis; 
    } else if (currentMillis - modePressStart >= 3000) { 
      settingMode = true;
      settingStep = 0;
      lastButtonPress = currentMillis;
      modePressStart = 0;  
    }
  } else {
    modePressStart = 0;
  }

  // بررسی فشار دکمه MODE برای تغییر بین تنظیمات
  if (modeButtonState == HIGH && lastModeButtonState == LOW && settingMode) {
    settingStep = (settingStep + 1) % 2;
    lastButtonPress = currentMillis;
  }
  lastModeButtonState = modeButtonState;

  // بررسی دکمه UP
  if (upButtonState == LOW && lastUpButtonState == HIGH) {
    if (settingMode) {
      if (settingStep == 0) {
        hours = (hours % 12) + 1;
        if (hours == 0) hours = 12;
      } else if (settingStep == 1) {
        minutes = (minutes + 1) % 60;
      }
      rtc.adjust(DateTime(now.year(), now.month(), now.day(), hours, minutes, seconds));
    } else {
      fixedTimeDisplay = !fixedTimeDisplay;
    }
    lastButtonPress = currentMillis;
  }
  lastUpButtonState = upButtonState;

  // بررسی دکمه DOWN
  if (downButtonState == LOW && lastDownButtonState == HIGH) {
    if (settingMode) {
      if (settingStep == 0) {
        hours = (hours == 1) ? 12 : hours - 1;
      } else if (settingStep == 1) {
        minutes = (minutes == 0) ? 59 : minutes - 1;
      }
      rtc.adjust(DateTime(now.year(), now.month(), now.day(), hours, minutes, seconds));
    }
    lastButtonPress = currentMillis;
  }
  lastDownButtonState = downButtonState;
}

void handleSetting() {
  if (settingStep == 0) {
    display.showNumberDecEx(hours, 0b01000000, false);
  } else if (settingStep == 1) {
    display.showNumberDecEx(minutes, 0b01000000, false);
  }
}