#include <Wire.h>
#include "DHT.h"
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <UniversalTelegramBot.h>

#define WIFI_SSID "network"
#define WIFI_PASSWORD "123456789"

int setTemprature = 23;
#define BOT_TOKEN "6140528970:AAHV78G7miJ0Auw-uh7HYy8cVyvzYhh46jQ"G5OpIUQw0pl275pPGFeDfx2frQ6Ca4FH8"
String chat_id = "895680550";

WiFiClientSecure secured_client;
UniversalTelegramBot bot(BOT_TOKEN, secured_client);

const unsigned long BOT_MTBS = 500; // mean time between scan messages
unsigned long bot_lasttime;          // last time messages' scan has been done
bool Start = false;

#define DHTPIN 18
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);
int FlamePin  = 35;
int SoilDigitalPin = 34;
const int relyFan = 4;
const int relyLight = 32;
const int relyPump = 21;
int flag = 0;
int sensorDigitalValue = 0;
float t = 0;
float h = 0;
int sensorReading = 0;
void handleNewMessages(int numNewMessages)
{
  Serial.println("handleNewMessages");
  Serial.println(String(numNewMessages));
  for (int i = 0; i < numNewMessages; i++)
  {
    String chat_id = bot.messages[i].chat_id;
    String text = bot.messages[i].text;

    String from_name = bot.messages[i].from_name;
    if (from_name == "")
      from_name = "Guest";

    if (text == "/send_test_action")
    {
      bot.sendChatAction(chat_id, "typing");
      delay(4000);
      bot.sendMessage(chat_id, "Did you see the action message?");

      // You can't use own message, just choose from one of bellow

      //typing for text messages
      //upload_photo for photos
      //record_video or upload_video for videos
      //record_audio or upload_audio for audio files
      //upload_document for general files
      //find_location for location data

      //more info here - https://core.telegram.org/bots/api#sendchataction
    }
    ///////////////////////////////////////////////////
    if (text == "/fan_on")
    {

      bot.sendMessage(chat_id, "fan is on");
      //turn fan on
      digitalWrite( relyFan, HIGH);
      delay(500);
    }
    if (text == "/fan_off")
    {
      bot.sendMessage(chat_id, "fan is off");
      //turn fan off
      digitalWrite( relyFan, LOW);
    }
    //////////////////////////////////////////////////////////
    if (text == "/light_on")
    {
      bot.sendMessage(chat_id, "light is on");
      //turn light on
      digitalWrite( relyLight, HIGH);
    }

    if (text == "/light_off")
    {
      bot.sendMessage(chat_id, "light is off");
      //turn light off
      digitalWrite( relyLight, LOW);
    }
    //////////////////////////////////////////////////////////
    if (text == "/pump_on")
    {
      bot.sendMessage(chat_id, "pump is on");
      //turn pump on
      if (sensorDigitalValue < 50) {
        flag = 1;
        digitalWrite( relyPump, HIGH);
      }
      else {
        digitalWrite( relyPump, LOW);
        bot.sendMessage(chat_id, "High Humidity pump is off ");
      }
    }
    if (text == "/pump_off")
    {
      bot.sendMessage(chat_id, "pump is off");
      digitalWrite( relyPump, LOW);
    }
    //////////////////////////////////////////////////////////

    if (text == "/data")
    {
      String temp_str = "Temp: " + String(t) + "°C \n";
      String hum_str = "Hum: " + String(h) + "% \n";
      String Soil_str =  "Soil Hum:" + String(sensorDigitalValue) + "% \n";
      bot.sendMessage(chat_id, temp_str );
      bot.sendMessage(chat_id, hum_str);
      bot.sendMessage(chat_id, Soil_str);
    }
    //////////////////////////////////////////////////////////
    if (text == "/options")
    {
      String keyboardJson = "[[\"/light_on\", \"/light_off\"],[\"/pump_on\", \"/pump_off\"],[\"/fan_on\", \"/fan_off\"],[\"/data\"]]";
      bot.sendMessageWithReplyKeyboard(chat_id, "Choose from one of the following options", "", keyboardJson, true);
    }
    if (text == "/start")
    {
      String welcome = "Welcome to Universal Arduino Telegram Bot library, " + from_name + ".\n";
      welcome += "This is Chat Action Bot example.\n\n";
      welcome += "/send_test_action : to send test chat action message\n";
      bot.sendMessage(chat_id, welcome);
    }

  }
}

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++[ Setup Start]
void setup() {
  Serial.begin(9600);
  initSensorsAndOutputs();
  connectToWiFi();
  bot.sendMessage(chat_id, "Project Online");
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++[ Setup end]

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++[  Loop Start]
void loop() {

  readSensorsAndSerialDisplay();
  receiveOrdersFromTelegramUsers();

  //****************************************************************
  //Flame Sensor Conditions
  if (sensorReading < 500 ) {
    bot.sendMessage(chat_id, "Fire detected");
    digitalWrite( relyPump, HIGH);
    delay(500);
  }
  else if (sensorReading > 500 && flag == 0) {
    digitalWrite( relyPump, LOW);
  }
  //****************************************************************

  //****************************************************************
  //Soil Moisture Sensor Conditions
  if (sensorDigitalValue < 50) {
    flag = 1;
    digitalWrite( relyPump, HIGH);
  }
  else if (sensorDigitalValue > 50 && flag == 1) {
    flag = 0;
    digitalWrite( relyPump, LOW);
    bot.sendMessage(chat_id, "High Humidity pump is off ");
  }
  //****************************************************************


  //****************************************************************
  //DHT11 Temprature Sensor Conditions
  if (t > setTemprature) {
    digitalWrite(relyFan, HIGH);
    delay(500);
  }
  else if (t <= setTemprature) {
    digitalWrite(relyFan, LOW);
  }
  //****************************************************************

}//end of loop
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++[  Loop end]

////////////////////////////////////////////////
void connectToWiFi() {
  Serial.print("Connecting to Wifi SSID ");
  Serial.print(WIFI_SSID);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  secured_client.setCACert(TELEGRAM_CERTIFICATE_ROOT);
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(500);
  }
  Serial.print("\n");
  Serial.print("WiFi connected. IP address: ");
  Serial.println(WiFi.localIP());


  Serial.print("Retrieving time: ");
  configTime(0, 0, "pool.ntp.org");
  time_t now = time(nullptr);
  while (now < 24 * 3600)
  {
    Serial.print(".");
    delay(100);
    now = time(nullptr);
  }
  Serial.println(now);

}

void readSensorsAndSerialDisplay() {
  sensorDigitalValue = analogRead(SoilDigitalPin);
  h = dht.readHumidity();
  t = dht.readTemperature();
  sensorReading = analogRead(FlamePin);
  sensorDigitalValue = map(sensorDigitalValue, 0, 4095, 100, 0);

  Serial.print("Soil sensor digital value: ");
  Serial.println(sensorDigitalValue);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.println(F("°C "));
  Serial.print(F("%  Humidity: "));
  Serial.println(h);
  Serial.print(F("Flame sensor reading: "));
  Serial.println(sensorReading);
}


void receiveOrdersFromTelegramUsers() {
  if (millis() - bot_lasttime > BOT_MTBS)
  {
    int numNewMessages = bot.getUpdates(bot.last_message_received + 1);

    while (numNewMessages)
    {
      Serial.println("got response");
      handleNewMessages(numNewMessages);
      numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    }

    bot_lasttime = millis();
  }
}


void initSensorsAndOutputs() {
  dht.begin();
  pinMode (FlamePin, INPUT);
  pinMode(SoilDigitalPin, INPUT);
  pinMode(relyFan, OUTPUT);
  pinMode(relyLight, OUTPUT);
  pinMode(relyPump, OUTPUT);
  digitalWrite(relyPump, LOW);
  digitalWrite(relyLight, LOW);
  digitalWrite(relyFan, LOW);
}