#include "RTClib.h"
#include <SD.h>

File textFile;
RTC_DS1307 rtc;
#define CS_PIN 53
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
long count = 0;
long lastCount = 0;

String date_data = "";
String time_data = "";
String day_data = "";
String dataString = "";
String areacode = "";

String filename = "datalog.csv";
String title = "Kyware Project";
bool csv_file = false;

bool fileFindString(File textFile, String searchString) {
  while (textFile.available()) {
    if (textFile.readStringUntil('\n').indexOf(searchString) != -1) {
      return true;
    }
  }
  return false;
}

void setup () {
  Serial.begin(115200);
  pinMode(4, INPUT_PULLUP);
  pinMode(5, INPUT_PULLUP);
  if (!rtc.begin()) {
    Serial.println("RTC TIDAK TERBACA");
    while (1);
    // Serial.flush();
    // abort();
  }
    if (!rtc.isrunning())
  {
    Serial.println("RTC is NOT running!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); //update rtc from pc
  }
  Serial.print("Initializing SD card... ");

  if (!SD.begin(CS_PIN)) {
    Serial.println("Card initialization failed!");
    while (true);
  }

  Serial.println("initialization done.");

  textFile = SD.open(filename);
  if (textFile) {
    if (fileFindString(textFile, title)) {
      csv_file = true;
      Serial.println("File berisi tulisan 'title'");
    } else {
      csv_file = false;
      Serial.println("File tidak berisi tulisan 'title'");
    }
  }
  else{
    textFile = SD.open(filename, FILE_WRITE);
    textFile.println(title);
    textFile.println("Hari || Tanggal || Jam || Counter");
    textFile.close(); 
  }

  textFile = SD.open(filename);
  if (textFile) {
    if (fileFindString(textFile, title)) {
      csv_file = true;
      Serial.println("File berisi tulisan 'title'");
      lastCounterValue = getCounterValue();
      Serial.println(lastCounterValue);
    } else {
      csv_file = false;
      Serial.println("File tidak berisi tulisan 'title'");
    }
    
  }
}

void loop () {

  if(digitalRead(5)==LOW){
    textFile = SD.open(filename);
    if (textFile) {
      Serial.print("Counter = ");
      Serial.println(getCounterValue());
    
    } else {
      Serial.println("Gagal membuka file datalog.csv!");
    }
  }

  if(digitalRead(4)==LOW){
    count += 1;
    textFile = SD.open(filename, FILE_WRITE);
    if (textFile) {
      textFile.println(dataString);
      textFile.close();
    }
    delay(500);
    textFile = SD.open(filename);
    if (textFile) {
      while (textFile.available()) {
        Serial.write(textFile.read());
      }
      textFile.close();
    } else {
      Serial.println("Gagal membuka file datalog.csv!");
    }  
  }

  DateTime now = rtc.now();
  // date_data = "DATE:" + String(now.day()) + '/' + String(now.month()) + '/' + String(now.year());
  // time_data = " TIME:" + String(now.hour()) + ':' + String(now.minute()) + ':' + String(now.second());
  // day_data = " Day : " + String(daysOfTheWeek[now.dayOfTheWeek()]);
  day_data = String(daysOfTheWeek[now.dayOfTheWeek()]);
  date_data = " || " + String(now.day()) + '/' + String(now.month()) + '/' + String(now.year());
  time_data = " || " + String(now.hour()) + ':' + String(now.minute()) + ':' + String(now.second());
  dataString =  day_data + date_data + time_data + " || Counter : " + count;
  //DateTime now = rtc.now();
  // 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.print(date_data);
  // Serial.print(time_data);
  // Serial.println(day_data);
  // delay(3000);
}

void printDirectory(File dir, int numTabs) {
  while (true) {

    File entry =  dir.openNextFile();
    if (! entry) {
      // no more files
      break;
    }
    for (uint8_t i = 0; i < numTabs; i++) {
      Serial.print('\t');
    }
    Serial.print(entry.name());
    if (entry.isDirectory()) {
      Serial.println("/");
      printDirectory(entry, numTabs + 1);
    } else {
      // files have sizes, directories do not
      Serial.print("\t\t");
      Serial.println(entry.size(), DEC);
    }
    entry.close();
  }
}

int getCounterValue() {
  // Mencari nilai counter terakhir
  String lastLine;
  while (textFile.available()) {
    lastLine = textFile.readStringUntil('\n');
  }
  textFile.close();

  // Mendapatkan nilai counter dari baris terakhir
  int index = lastLine.indexOf("Counter : ");
  if (index != -1) {
    return lastLine.substring(index + 10).toInt();
  }

  return -1; // Jika tidak ditemukan nilai counter
}