#include <Stepper.h>
#include "DHT.h"
#include <SD.h>
#include "RTClib.h"
#include <LiquidCrystal_I2C.h>

unsigned long lastTimeSerialPrint = millis();
unsigned long delayBetweenSerialPrint = 2000;

const int stepsPerRevolution = 200;
#define DHTPIN 2
#define DHTTYPE DHT22
#define BUTTON_PIN_1 8
#define BUTTON_PIN_2 9

int i = 1;
int CS_pin = 10;

LiquidCrystal_I2C lcd(0x27,16,2);

Stepper myStepper(stepsPerRevolution, 4, 5, 6, 7);
DHT dht(DHTPIN, DHTTYPE);
File sd_file;

RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

void setup() {
  Serial.begin(115200);
  pinMode(CS_pin, OUTPUT);
  pinMode(BUTTON_PIN_1, INPUT_PULLUP);
  pinMode(BUTTON_PIN_2, INPUT_PULLUP);
  lcd.init();
  lcd.clear();
  lcd.backlight();

  lcd.setCursor(0,0);
  lcd.print("Otomatis Pendingin");
  lcd.setCursor(0,1);
  lcd.print("Kelas");
  lcd.setCursor(6,1);
  lcd.print("Ruang 1");
  Serial.println(F("Cek Suhu dan Kelembaban"));
  dht.begin();
  myStepper.setSpeed(120);
  if (SD.begin())  {
    Serial.println("SD card is initialized. Ready to go");
  } 
  else  {
    Serial.println("Failed");
    return;
  }
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
}

void loop() {
  int value1 = digitalRead((BUTTON_PIN_1));
  int value2 = digitalRead((BUTTON_PIN_2));
  if (value1 == HIGH) {
    File sd_file = SD.open("data.txt", FILE_WRITE);
    if (sd_file)  {
      DateTime now = rtc.now();

      unsigned long timeNow = millis();

      float temperature = dht.readTemperature();
      float humidity = dht.readHumidity();

      if (isnan(temperature) || isnan(humidity)) {
        Serial.println(F("Failed to read from DHT sensor!"));
        return;
      }
      if (temperature > 24 || humidity > 60) {
        myStepper.step(stepsPerRevolution);
        if (timeNow - lastTimeSerialPrint > delayBetweenSerialPrint) {
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.print("Data ke: ");
          Serial.println(i);
          Serial.print("Current time: ");
          Serial.print(now.year(), DEC);
          Serial.print('/');
          Serial.print(now.month(), DEC);
          Serial.print('/');
          Serial.print(now.day(), DEC);
          Serial.print(" (");
          Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
          Serial.print(") ");
          Serial.print(now.hour(), DEC);
          Serial.print(':');
          Serial.print(now.minute(), DEC);
          Serial.print(':');
          Serial.print(now.second(), DEC);
          Serial.println();
          Serial.println(F("Temperature & Humidity Realtime: "));
          Serial.print(F("Humidity: "));
          Serial.print(humidity);
          Serial.print(F("%  Temperature: "));
          Serial.print(temperature);
          Serial.println(F("°C "));
          Serial.println("");
          
          sd_file.print("Data ke: ");
          sd_file.println(i);
          sd_file.print("Current time: ");
          sd_file.print(now.year(), DEC);
          sd_file.print('/');
          sd_file.print(now.month(), DEC);
          sd_file.print('/');
          sd_file.print(now.day(), DEC);
          sd_file.print(" (");
          sd_file.print(daysOfTheWeek[now.dayOfTheWeek()]);
          sd_file.print(") ");
          sd_file.print(now.hour(), DEC);
          sd_file.print(':');
          sd_file.print(now.minute(), DEC);
          sd_file.print(':');
          sd_file.print(now.second(), DEC);
          sd_file.println();
          sd_file.print(F("Humidity: "));
          sd_file.print(humidity);
          sd_file.print(F("%  Temperature: "));
          sd_file.print(temperature);
          sd_file.println(F("°C "));
          sd_file.println("");

          i++;
          lastTimeSerialPrint = timeNow;
        }
      } else {
        if (timeNow - lastTimeSerialPrint > delayBetweenSerialPrint) {
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.println("");
          Serial.print("Data ke: ");
          Serial.println(i);
          Serial.print("Current time: ");
          Serial.print(now.year(), DEC);
          Serial.print('/');
          Serial.print(now.month(), DEC);
          Serial.print('/');
          Serial.print(now.day(), DEC);
          Serial.print(" (");
          Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
          Serial.print(") ");
          Serial.print(now.hour(), DEC);
          Serial.print(':');
          Serial.print(now.minute(), DEC);
          Serial.print(':');
          Serial.print(now.second(), DEC);
          Serial.println();
          Serial.println(F("Temperature & Humidity Realtime: "));
          Serial.print(F("Humidity: "));
          Serial.print(humidity);
          Serial.print(F("%  Temperature: "));
          Serial.print(temperature);
          Serial.println(F("°C "));
          Serial.println("");

          sd_file.print("Data ke: ");
          sd_file.println(i);
          sd_file.print("Current time: ");
          sd_file.print(now.year(), DEC);
          sd_file.print('/');
          sd_file.print(now.month(), DEC);
          sd_file.print('/');
          sd_file.print(now.day(), DEC);
          sd_file.print(" (");
          sd_file.print(daysOfTheWeek[now.dayOfTheWeek()]);
          sd_file.print(") ");
          sd_file.print(now.hour(), DEC);
          sd_file.print(':');
          sd_file.print(now.minute(), DEC);
          sd_file.print(':');
          sd_file.print(now.second(), DEC);
          sd_file.println();
          sd_file.print(F("Humidity: "));
          sd_file.print(humidity);
          sd_file.print(F("%  Temperature: "));
          sd_file.print(temperature);
          sd_file.println(F("°C "));
          sd_file.println("");

          lastTimeSerialPrint = timeNow;
        }
      }
      sd_file.close();
    }
  }
  else if (value2 == HIGH) {
    File xsd_file = SD.open("data.txt");
    if (xsd_file) {
      unsigned long timeNow = millis();
      if (timeNow - lastTimeSerialPrint > delayBetweenSerialPrint) {
        Serial.println("");
        Serial.println("");
        Serial.println("");
        Serial.println("");
        Serial.println("");
        Serial.println("");
        Serial.println("Isi dari data.txt: ");
        while (xsd_file.available()) {
          Serial.write(xsd_file.read());
        }
        lastTimeSerialPrint = timeNow;
      }
      xsd_file.close();
    }
  }
}