#include <WiFi.h>
#include <HTTPClient.h>
#include <Arduino_JSON.h>
#include <Keypad.h>                 //Library keypad
#include <LiquidCrystal_I2C.h>    //Library LCD I2C
LiquidCrystal_I2C lcd(0x27,16,2);   //Alamat I2C

const byte ROWS = 4;    //Jumlah baris keypad
const byte COLS = 4;    //Jumlah kolom keypad

char Keys[ROWS][COLS] = {   //Membuat array keypad
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

byte rowPins[ROWS] = {19,18,5,17 }; 
byte colPins[COLS] = {  16, 4, 2, 15};

Keypad customKeypad = Keypad( makeKeymap(Keys), rowPins, colPins, ROWS, COLS);    //Masukkan info keypad pada library


char customKey;         //Variabel penampung input keypad
int number = 0;         //Variabel penampung nilai angka
int passworddor = 1234;    //Password
int newpass = 0;
int updatestat = 0;
int trying = 0;
int myRelay = 12;
int kali = 0;
int berhasilkirim = 0;

const char* ssid = "Wokwi-GUEST";
const char* password = "";

String serverName = "https://sgp1.blynk.cloud/external/api/batch/update?token=P0sMvU-4IKRArRSmTMID0O6kUpNSJSAg";
String serverName2 = "https://sgp1.blynk.cloud/external/api/get?token=P0sMvU-4IKRArRSmTMID0O6kUpNSJSAg&v0&v1&v2";


void setup() {
  Serial.begin(115200);
  lcd.init ();              //Mulai LCD
  lcd.setBacklight(HIGH);   //Nyalakan backlight

  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while(WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP()); 

  pinMode(myRelay, OUTPUT);
  digitalWrite(myRelay, LOW);

          if(WiFi.status()== WL_CONNECTED)
          { 
            HTTPClient http;
            String serverPath = serverName2;
            http.begin(serverPath);
            int httpResponseCode = http.GET();
            if (httpResponseCode>0)
            {
              String payload = http.getString();
              JSONVar myObject = JSON.parse(payload);
              if (JSON.typeof(myObject) == "undefined")
              {
                Serial.println("Parsing input failed!");
                return;
              }

              JSONVar keys = myObject.keys();
              JSONVar value = myObject[keys[0]];
              Serial.print("keys: ");
              Serial.println(keys);
              newpass = value;
              Serial.print("newpass: ");
              Serial.println(newpass);

              value = myObject[keys[2]];
              trying = value;
              passworddor = newpass;
              updatestat = 1;

            }
            else
            {
              Serial.print("Error code: ");
              Serial.println(httpResponseCode);
            } 
            http.end();
          }
          else
            {
              Serial.println("WiFi Disconnected");
            }


}

void loop() {
  if (trying<3){
  lcd.setCursor(0,0);
  lcd.print("Input Password = ");      //Tampilan pada layar LCD
  customKey = customKeypad.getKey();    //Baca input keypad

  //------------Prosedur jika input berupa angka------------//
  switch(customKey){
    case '0' ... '9':
      lcd.setCursor(0,1);
      number = number * 10 + (customKey - '0');
      lcd.print(number);
      Serial.print("Input Password =  ");
      Serial.println(number);
    break;

    //------------Jika input '#' maka cek password------------//
    case '#':
      if(number == passworddor){           //Jika password benar, maka
        lcd.setCursor(0,1);
        lcd.print("Access Accepted ");  //Tampilan LCD
        number = 0;
        lcd.clear(); 
        int detik = 5;
      while (kali <= 5000){
        
        lcd.setCursor(0,0);
        lcd.print("Pintu Terbuka");
        Serial.println("Pintu Terbuka");
        lcd.setCursor(0,1);
        lcd.print("Selama " + String(detik) + "  dtk");
        digitalWrite(myRelay, HIGH); // buka kunci pintu
        delay (1000);           //delay selama 5 detik sebelum pintu di buka lagi
        kali = 1000 + kali;
        detik = detik - 1;
      }
        digitalWrite(myRelay, LOW); 
        lcd.clear(); 
        kali = 0;
       
      }
      else{                             //Jika salah, maka
        lcd.setCursor(0,1);
        lcd.print("Invalid Password");  //Tampilan LCD
        Serial.println("Password Salah");
        delay(2000);
        number = 0;
        trying = trying + 1;
        lcd.clear();
        berhasilkirim = 0;
      }
    break;

    //------------Jika input '*' maka hapus tampilan------------//
    case '*':
      number = 0;
      lcd.clear();
    break;

    // ----------Jika Menekan Tombol A, Untuk Update Password----//

    case 'A':

        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Update Password");  //Tampilan LCD
        Serial.println("Update Password");
//  Membaca Blynk
        if(WiFi.status()== WL_CONNECTED)
          { 
            HTTPClient http;
            String serverPath = serverName2;
            http.begin(serverPath);
            int httpResponseCode = http.GET();
            if (httpResponseCode>0)
            {
              String payload = http.getString();
              JSONVar myObject = JSON.parse(payload);
              if (JSON.typeof(myObject) == "undefined")
              {
                Serial.println("Parsing input failed!");
                return;
              }

              JSONVar keys = myObject.keys();
              JSONVar value = myObject[keys[0]];
              Serial.print("keys: ");
              Serial.println(keys);
              newpass = value;
              Serial.print("newpass: ");
              Serial.println(newpass);

              passworddor = newpass;
              updatestat = 1;

            }
            else
            {
              Serial.print("Error code: ");
              Serial.println(httpResponseCode);
            } 
            http.end();
          }
          else
            {
              Serial.println("WiFi Disconnected");
            }

            // Menulis Blynk
          if(WiFi.status()== WL_CONNECTED)
            {
              HTTPClient http;
              String serverPath = serverName +"&v1="+ String(updatestat) ;
              http.begin(serverPath);
              Serial.println(serverPath);
              int httpResponseCode = http.GET();
              if (httpResponseCode>0)
              {
                Serial.print("HTTP Response code: ");
                Serial.println(httpResponseCode);
                String payload = http.getString();
                Serial.println(payload);
              }
              else
              {
                Serial.print("Error code: ");
                Serial.println(httpResponseCode);
              }
              http.end();
            }
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Update Password");  //Tampilan LCD
        lcd.setCursor(0,1);
        lcd.print("Berhasil");  //Tampilan LCD
        Serial.println("Update Password Berhasil");
        delay(2000);
        lcd.clear();

    break;
  }
// ----- Jika Sudah Tiga Kali Gagal Masukin Password ------------
}
else if (trying == 3){
        Serial.println("Akses Terkunci");
        lcd.setCursor(0,0);
        lcd.print("Akses Terkunci");  //Tampilan LCD
        lcd.setCursor(0,1);
        lcd.print("Buka Akses di App");  //Tampilan LCD

  // Menulis Blynk

if (berhasilkirim != 1 )
if(WiFi.status()== WL_CONNECTED)
  {
    HTTPClient http;
    String serverPath = serverName + "&v2="+ String(trying);
    http.begin(serverPath);
    Serial.println(serverPath);
    int httpResponseCode = http.GET();
    if (httpResponseCode>0)
    {
      Serial.print("HTTP Response code: ");
      Serial.println(httpResponseCode);
      String payload = http.getString();
      Serial.println(payload);
      berhasilkirim = 1;
      Serial.println(berhasilkirim);
    }
    else
    {
      Serial.print("Error code: ");
      Serial.println(httpResponseCode);
      Serial.println("Akses Terkunci Buka Akses Melalui Aplikasi");

    }
    http.end();
  }

  //  Membaca Blynk

 if (berhasilkirim == 1){
if(WiFi.status()== WL_CONNECTED)
  { 
    HTTPClient http;
    String serverPath = serverName2;
    http.begin(serverPath);
    int httpResponseCode = http.GET();
    if (httpResponseCode>0)
     {
      String payload = http.getString();
      JSONVar myObject = JSON.parse(payload);
      if (JSON.typeof(myObject) == "undefined")
      {
        Serial.println("Parsing input failed!");
        return;
      }

      JSONVar keys = myObject.keys();
      JSONVar value = myObject[keys[2]];
      Serial.print("keys: ");
      Serial.println(keys);
      trying = value;
      Serial.print("trying: ");
      Serial.println(trying);
      if (trying == 0){
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Akses Terbuka");  //Tampilan LCD
        Serial.println("Akses Kembali di buka");
        delay (2000);
        lcd.clear();
      }

     }
     else
    {
      Serial.print("Error code: ");
      Serial.println(httpResponseCode);
    } 
     http.end();
  }
  else
    {
      Serial.println("WiFi Disconnected");
    }
    }
lcd.clear();
}



}/* Program Kunci Pintu dengan password input Keypad 4x4 dibuat oleh Indobot */