#include <SPI.h> //for the SD card module
#include <SD.h> // for the SD card
#include <RTClib.h> // for the RTC

int inputPin = 2;               // PIR PIN
int pirState = LOW;             // PIR STATE
int val = 0;                    // INITIAL VALUE

const int chipSelect = 10; 

File myFile;
RTC_DS1307 rtc;

void setup() {
  Serial.begin(9600);
  pinMode(inputPin, INPUT);
  // RTC TEST RUN
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
  else {Serial.println("RTC is running!");} 
  // SD Card INITIALIZING
  Serial.print("Initializing SD card...");
  if(!SD.begin(chipSelect)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");
}

void loggingPIRSensor() {
  DateTime now = rtc.now();
  myFile = SD.open("PIRSensor.txt", FILE_WRITE);
  
  val = digitalRead(inputPin);  // read input value

  if (val == HIGH) {            // check if the input is HIGH
    if (pirState == LOW) {
      // TURN ON PIR
      Serial.println("Opening File");
      Serial.println("Motion detected!");
      Serial.println("ALCOHOL IS DRAINING");
      Serial.print(now.month(), DEC);
      Serial.print('/');
      Serial.print(now.day(), DEC);
      Serial.print('/');
      Serial.println(now.year(), DEC);
      Serial.print(now.hour(), DEC);
      Serial.print(':');
      Serial.print(now.minute(), DEC);
      Serial.print(':');
      Serial.println(now.second(), DEC);
      Serial.println("");

      myFile = SD.open("PIRSensor.txt", FILE_WRITE);
      if (myFile) {
        myFile.print("Motion Detected!");
        myFile.println("ALCOHOL IS DRAINING");
        myFile.print(now.month(), DEC);
        myFile.print('/');
        myFile.print(now.day(), DEC);
        myFile.print('/');
        myFile.print(now.year(), DEC);
        myFile.print(',');
        myFile.print(now.hour(), DEC);
        myFile.print(':');
        myFile.print(now.minute(), DEC);
        myFile.print(':');
        myFile.print(now.second(), DEC);
        myFile.print(",");
      }
      // UPDATE THE SENSOR
      pirState = HIGH;
      delay(3000);
    }
  } else {
    if (pirState == HIGH) {
      Serial.println("STANDBY");
      Serial.println("Closing File\n");
      pirState = LOW;
    }
  }
  myFile.close();
}

void loop() {
  loggingPIRSensor();
}