//---UID Reader to Serial w/ RTC---
//This is a codebreaker machine for MIFARE Classic or Classic 1k cards

#define SSpin 53
#define SCKpin 52
#define MOSIpin 51
#define MISOpin 50
#define LED_STAT 10
#define LED_RD 11

#include <Arduino.h>
#include <Adafruit_PN532.h>
#include <Wire.h>
#include <SPI.h>
#include <ArduinoJson.h>
#include <ArduinoJson.hpp>
#include "RTClib.h"

Adafruit_PN532 mifare(SCKpin, MISOpin, MOSIpin, SSpin);
RTC_DS1307 clk;
StaticJsonDocument<384> js;

char buf[384];
char dino[7][12] = {"MINGGU" ,"SENIN", "SELASA", "RABU", "KAMIS", "JUMAT", "SABTU"};
uint8_t universal[6] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; 

uint8_t scs;
uint8_t b;
uint8_t state = 0;
uint8_t uid[] = {0, 0, 0, 0, 0, 0, 0};
String uid_now = "";
uint8_t uidLen;
uint8_t data[16];
String nid = "";

void status_blink(uint8_t PIN, uint8_t STATUS){
  for(uint8_t f=0; f<STATUS; f++){
    f++;
    digitalWrite(PIN, 1);
    delay(48);
    digitalWrite(PIN, 0);
    delay(48);
  }
}

void in_people(){
  js.clear();
  DateTime now= clk.now();
  String nid = "";
  Serial.print("\nUID: ");
  for(b=0; b<uidLen; b++){
    Serial.print(uid[b], DEC);
    Serial.print(" ");
    nid += uid[b];
  }
  Serial.print("  Masuk: ");
  Serial.print(now.hour(), DEC);
  Serial.print(":");
  if(now.minute()<10){
    Serial.print("0");
    Serial.print(now.minute(), DEC);
  }else{Serial.print(now.minute(), DEC);}
  Serial.print(":");
  if(now.second()<10){
    Serial.print("0");
    Serial.print(now.second(), DEC);
  }else{Serial.print(now.second(), DEC);}
  Serial.print("---");
  Serial.print(dino[now.dayOfTheWeek()]);
  Serial.print(", ");
  Serial.print(now.day(), DEC);
  Serial.print("/");
  Serial.print(now.month(), DEC);
  Serial.print("/");
  Serial.print(now.year(), DEC);
  Serial.print("\n");
  String status = "IN";
  js["uid"] = nid;
  js["status"] = status;
  serializeJson(js, Serial);
  delay(1000);
}

void out_people(){
  js.clear();
  String nid = "";
  DateTime now= clk.now();
  Serial.print("\nUID: ");
  for(b=0; b<uidLen; b++){
    Serial.print(uid[b], DEC);
    Serial.print(" ");
    nid += uid[b];
  }
  Serial.print("  Keluar: ");
  Serial.print(now.hour(), DEC);
  Serial.print(":");
  if(now.minute()<10){
    Serial.print("0");
    Serial.print(now.minute(), DEC);
  }else{Serial.print(now.minute(), DEC);}
  Serial.print(":");
  if(now.second()<10){
    Serial.print("0");
    Serial.print(now.second(), DEC);
  }else{Serial.print(now.second(), DEC);}
  Serial.print("---");
  Serial.print(dino[now.dayOfTheWeek()]);
  Serial.print(", ");
  Serial.print(now.day(), DEC);
  Serial.print("/");
  Serial.print(now.month(), DEC);
  Serial.print("/");
  Serial.print(now.year(), DEC);
  Serial.print("\n");
  String status = "OUT";
  js["uid"] = nid;
  js["status"] = status;
  serializeJson(js, Serial);
  delay(1000);
}

void setup(void) {
  Serial.begin(115200);
  Serial.print("RFID Absension System v0.1\n");

  pinMode(LED_STAT, 0x1);
  pinMode(LED_RD, 0x1);
  mifare.begin();

  uint32_t hwversion = mifare.getFirmwareVersion();
  if(!hwversion){
    Serial.print("Check wiring, or restart device...");
    while(1);
  }

  Serial.print("Found chip PN5"); Serial.println((hwversion>>24) & 0xFF, HEX); 
  Serial.print("Firmware ver. "); Serial.print((hwversion>>16) & 0xFF, DEC); 
  Serial.print('.'); Serial.println((hwversion>>8) & 0xFF, DEC);

  mifare.setPassiveActivationRetries(0xFF);

  mifare.SAMConfig();
  delay(12);

  if(!clk.begin()){
    Serial.println("RTC Device Not Found.");
    Serial.flush();
    while(1) delay(12);
  }

  if(!clk.isrunning()){
    Serial.println("Setting datetime..");
    clk.adjust(DateTime(F(__DATE__), F(__TIME__)));
    delay(24);
  }

  Serial.println("Setting complete");
}

void loop(void){
  scs = mifare.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLen);
  if(scs){
    for(b=0; b<uidLen; b++){
      Serial.print(uid[b], DEC);
      Serial.print(" ");
      nid += uid[b];
    }
    nid = uid_now;
    if(state%2 == 0 && nid != uid_now){
      state++;
      in_people();
      // Serial.print("UID: ");
      // for(b=0; b<uidLen; b++){
      //   Serial.print(uid[b], HEX);
      // }
      // Serial.print("\n Masuk: ");
      // Serial.print(now.hour(), DEC);
      // Serial.print(":");
      // if(now.minute()<10){
      //   Serial.print("0");
      //   Serial.print(now.minute(), DEC);
      // }else{Serial.print(now.minute(), DEC);}
      // Serial.print(":");
      // if(now.second()<10){
      //   Serial.print("0");
      //   Serial.print(now.second(), DEC);
      // }else{Serial.print(now.second(), DEC);}
      // Serial.print("---");
      // Serial.print(dino[now.dayOfTheWeek()]);
      // Serial.print(", ");
      // Serial.print(now.day(), DEC);
      // Serial.print("/");
      // Serial.print(now.month(), DEC);
      // Serial.print("/");
      // Serial.print(now.year(), DEC);
      // Serial.print("\n");
      // delay(1000);
    }else if(state%2 != 0 && nid != uid_now){
      state++;
      out_people();
      // Serial.print("UID: ");
      // for(b=0; b<uidLen; b++){
      //   Serial.print(uid[b], HEX);
      // }
      // Serial.print("\n Keluar: ");
      // Serial.print(now.hour(), DEC);
      // Serial.print(":");
      // if(now.minute()<10){
      //   Serial.print("0");
      //   Serial.print(now.minute(), DEC);
      // }else{Serial.print(now.minute(), DEC);}
      // Serial.print(":");
      // if(now.second()<10){
      //   Serial.print("0");
      //   Serial.print(now.second(), DEC);
      // }else{Serial.print(now.second(), DEC);}
      // Serial.print("---");
      // Serial.print(dino[now.dayOfTheWeek()]);
      // Serial.print(", ");
      // Serial.print(now.day(), DEC);
      // Serial.print("/");
      // Serial.print(now.month(), DEC);
      // Serial.print("/");
      // Serial.print(now.year(), DEC);
      // Serial.print("\n");
      // delay(1000);
    }
  }else{
    Serial.print("\nUnidentified card ?");
  }
}