#define BLYNK_TEMPLATE_ID "TMPL2d3ZrXCB0"//get it from both app and web
#define BLYNK_TEMPLATE_NAME "smart home"
#define BLYNK_AUTH_TOKEN "sZqpz8MSt4uXr9kfJHtzpcZ5bSawDONU"//get only from web
#define BLYNK_PRINT Serial //all defines must be before including BLYNK LIBRARY


#define LIVINGLIGHT 5
#define BEDROOMLIGHT 15

#define TRIALS 3
#define EEPROM_SIZE 4
#define PASS_LEN 4
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <EEPROM.h>
//include libraries for temperature sensor
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ESP32Servo.h>
#define TEMPBUS 2

//create bus instance
OneWire oneWire(TEMPBUS);
//CREATE TEMPERATURE SENSOR INSTANCE
DallasTemperature tempSensor(&oneWire);

//create servo instance
Servo curtains;
Servo door;
int pos=0;
//esp wifi connection
char ssid[]="Wokwi-GUEST";
char pass[]="";

String password="1234";
char firstTime=1;
char secure=0;
const char address=0;
static char tried;
unsigned char id; 
//when you get respone from dashboard(from blynk dash board)
BLYNK_WRITE(V0)
{ if(secure)
  {
    int val= param.asInt();
    digitalWrite(LIVINGLIGHT,val);
  }
}
BLYNK_WRITE(V1)//WIFI CONFIG
{ if(secure)
  {
    id=1;
    char n = WiFi.scanNetworks();
    for(char i=0;i<n;i++)
    {
      Blynk.virtualWrite(V7,String(i+1)+"."+String(WiFi.SSID(i))+"\t"+String(WiFi.RSSI(i))+"\t"+String((WiFi.encryptionType(i) == WIFI_AUTH_OPEN) ? "not-secured" : "secured"));
    }
  }
}
BLYNK_WRITE(V2)//CHANGE PASSWORD
{ if(secure)
  {
    Blynk.virtualWrite(V7,"Enter your current password first: ");
    id=2;
    Blynk.virtualWrite(V7,"CHOOSE THE NETWORK.");
  }
}
BLYNK_WRITE(V3)
{ if(secure)
  {
    int val= param.asInt();
    digitalWrite(BEDROOMLIGHT,val);
  }
}
BLYNK_WRITE(V5)
{ if(secure)
  {
    int input=(int)param.asInt();
    input=map(input,0,100,0,180);
    if(pos<input)
    {
      for(pos=pos;pos<=input;pos++)
      {
        curtains.write(pos);
        delay(15);
      }
    }
    else if(pos>input)
    {
      for(pos=pos;pos>=input;pos--)
      {
        curtains.write(pos);
        delay(15);
      }
    }
  }
    
}
BLYNK_WRITE(V7)//TERMINAL
{ //enter password default password=1234
  String input=param.asStr();
  
  if((!secure)&&(tried>0))
  {  
    Serial.print("PASSWORD ENTERED : ");
    Serial.println(input);
    if(input==EEPROM.readString(address))
    { 
      secure=1;
      Serial.println("the password is correct");
      Blynk.virtualWrite(V7,"WELCOME HOME SIR!");
      Blynk.virtualWrite(V4,255);//turn on the led
      for(int i=180;i>=0;i++)//open the door
      {
        door.write(pos);
        delay(10);
      }
    }
    else if(input!=EEPROM.readString(address))
    { 
      tried--;
      Serial.println("the password is wrong");
      Serial.print("trials left: ");
      Serial.println(String(tried));
      Blynk.virtualWrite(V7,"WRONG PASSWORD");
      if(tried!=0)
      { String msg=("TRIALS LEFT: " + String(tried));
        Blynk.virtualWrite(V7,msg);
      }
      else
      {
        Blynk.virtualWrite(V7,"Home will no longer recieve any response");
      }
    } 
  }
  else if(secure)
  { static char c=0;
    switch(id){
      case 1: 
              //input password check
              if(!c)
              { char index=input[0];
                (String)ssid=WiFi.SSID(index);
                if(WiFi.encryptionType(index)!=WIFI_AUTH_OPEN)//secured
                {
                  Blynk.virtualWrite(V7,"Enter Network Password: ");
                  c=1;
                  break;
                }
                else
                {
                  (String)pass="";
                  Blynk.virtualWrite(V7,"Network Password: ");
                }
              }
              else if(c)
              {
                (String)pass=input;
                c=0;
              }
              Blynk.begin(BLYNK_AUTH_TOKEN,ssid,pass,"blynk.cloud",8080);
              Serial.println(ssid);
              Serial.println(pass);
              break;
      case 2: //change password
              //c=0;//current password check 
              if(!c)
              { password=EEPROM.readString(address);
                if(input==EEPROM.readString(address))
                { 
                  Blynk.virtualWrite(V7,"Enter your NEW password: ");
                  c=1;
                }
                else
                {
                  Blynk.virtualWrite(V7,"Wrong Password");
                }
                break;
              }
              else if(c==1)//new password
              {
                password=input;
                Blynk.virtualWrite(V7,"Re-enter your new password");
                c=2;
              }
              else if(c==2)
              {
                if(input==password)
                {
                  EEPROM.writeString(address,input);
                  EEPROM.commit();
                  Blynk.virtualWrite(V7,"your password is updated");
                  Serial.print("New password is :");
                  Serial.println(EEPROM.readString(address));
                  Blynk.virtualWrite(V2,0);
                  c=0;
                }
                else
                {
                  password=EEPROM.readString(address);
                  Blynk.virtualWrite(V7,"WRONG MATCH");
                  c=0;
                  Blynk.virtualWrite(V2,0);
                }
              }
              
      
    }
    

  }
  
}

//when you are connected to blynk cloud
BLYNK_CONNECTED()
{ 
  Blynk.virtualWrite(V7,"Please Enter The Password: ");
  secure=0;
  for(int i=0;i<=180;i++)//close the door
    {
      door.write(pos);
      delay(10);
    }
  Blynk.virtualWrite(V4,0);//turn off open led
  
  tried=3;
}

void setup() 
{ //wifi mode station 
  WiFi.mode(WIFI_STA);
  //initiate serial baud rate
  Serial.begin(115200);
  //living room lightenning configuration
  pinMode(LIVINGLIGHT, OUTPUT);
  //bedroom ligtening config
  pinMode(BEDROOMLIGHT, OUTPUT);
  //initialize the tempreture sensor pin
  pinMode(TEMPBUS, OUTPUT);
  //connect to blynk platform
  Blynk.begin(BLYNK_AUTH_TOKEN,ssid,pass,"blynk.cloud",8080);
  //initiate the NV EEPROM
  EEPROM.begin(EEPROM_SIZE);
  //store system password in EEPROM
  EEPROM.writeString(address,"1234");//default password
  EEPROM.commit();
  //display stored password
  Serial.println(EEPROM.readString(address));
  tempSensor.begin();

  curtains.attach(13);
  door.attach(4);
}

void loop() 
{
  //listen to blynk platform
  Blynk.run(); 
  bool connect = Blynk.connected();
  if(connect != true)
  {
    Serial.println("YOU'RE DISCONNECTED");
    delay(2000);
    //FUTURE IMPROVEMENT send MQTT MSG to user
  }
  else
  { tempSensor.requestTemperatures(); // Send the command to get temperatures
    float tempC=tempSensor.getTempCByIndex(0);
    //DISPLAY TEMPERATURE
    Serial.println(tempC);
    Blynk.virtualWrite(V8,String(tempC)+"°C");
    if(tempC == DEVICE_DISCONNECTED_C) 
    {
        Serial.println("TEMPERATURE SENSOR IS DISCONNECTED");
        delay(2000);
    }
}}