#include <UniversalTelegramBot.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
//#include <ArduinoJson.h>
#include "DHT.h"


// -------- Define Pins -----------

//Button Pin (pulled down to ground)
#define BUTTON_PIN 35     // ✓
#define GAS_1_PIN 34      // ✓
#define GAS_2_PIN 39      // ✓
#define dht11_PIN 4       // ✓
#define redLED_PIN 16     // ✓
#define greenLED_PIN 17   // ✓
#define blueLED_PIN 18    // ✓
#define buzzer1_PIN 21    // ✓
#define buzzer2_PIN 22    // ✓

DHT dht(4, DHT11);

// -------- ---------- -----------

// Initialize Telegram BOT
#define botToken "5018567050:AAGiKQLOERxiFGlKYVZA5bI_bKz4vPeOp54"  // your Bot Token (Get from Botfather)
WiFiClientSecure client;
UniversalTelegramBot bot(botToken, client);
long checkTelegramDueTime;
int checkTelegramDelay = 1000; //  1000 (1 second)
int old_hum = 0;
int count = 0;

// The person/group you want the alert messages to go to.
// You must start a chat with a bot first before it can send you messages
String defaultChatId = "473975732"; //This can be got by using a bot called "myIdBot"

char ssid[] = "network";       // your network SSID (name)
char password[] = "123456789";  // your network key

volatile bool buttonPressedFlag = false;

long GAS_1_DueTime;
int check_GAS_1_Delay = 250; // 1000/4 (1/4 of a second)

long GAS_2_DueTime;
int check_GAS_2_Delay = 250; // 1000/4 (1/4 of a second)

long temp_DueTime;
int check_temp_Delay = 250; // 1000/4 (1/4 of a second)

int GAS_1_Value;
int GAS_2_Value;
float temp_Value;
float hum_Value;

void setup() {

  Serial.begin(115200);
  pinMode(BUTTON_PIN, INPUT);
  //pinMode(GAS_1_PIN, INPUT);
  //pinMode(GAS_2_PIN, INPUT);
  //pinMode(dht11_PIN, INPUT);
  dht.begin();
  pinMode(redLED_PIN, OUTPUT);
  pinMode(greenLED_PIN, OUTPUT);
  pinMode(blueLED_PIN, OUTPUT);
  pinMode(buzzer1_PIN, OUTPUT);
  pinMode(buzzer2_PIN, OUTPUT);

  digitalWrite(redLED_PIN, 0);
  digitalWrite(greenLED_PIN, 1);
  digitalWrite(blueLED_PIN, 1);
  digitalWrite(buzzer1_PIN, 0);
  digitalWrite(buzzer2_PIN, 0);

  attachInterrupt(BUTTON_PIN, interuptButtonPressed, RISING);

  // Attempt to connect to Wifi network:
  Serial.print("Connecting Wifi: ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  IPAddress ip = WiFi.localIP();
  Serial.println(ip);
  delay(10000);
}

void interuptButtonPressed() {
  Serial.println("SOS Button was pressed!!");
  int button = digitalRead(BUTTON_PIN);
  if (button == HIGH)
  {
    buttonPressedFlag = true;
  }
  return;
}
void handleButtonPressed() {
  bot.sendMessage(defaultChatId, "SOS Button was pressed!! HELP");
  buttonPressedFlag = false;
}

int checkGAS_1() {
  int value1 = analogRead(GAS_1_PIN);
  //Serial.print("GAS[1] value: ");
  //Serial.println(value);
  return value1;
}

int checkGAS_2() {
  int value2 = analogRead(GAS_2_PIN);
  //Serial.print("GAS[2] value: ");
  //Serial.println(value2);
  return value2;
}

float checkTemp() {
  float value3 = dht.readTemperature();
  //Serial.print("temprature value: ");
  //Serial.println(value3);
  return value3;
}

float checkHum() {
  float value4 = dht.readHumidity();
  //Serial.print("humidity value: ");
  //Serial.println(value4);
  return value4;
}

// --- Telgram functions ---

void handleNewMessages(int numNewMessages) {
  for (int i = 0; i < numNewMessages; i++) {
    String chat_id = String(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 == "/Sensor_Data") {
      int   value1  = checkGAS_1();
      int   value2 = checkGAS_2();
      float value3 = checkTemp();
      float value4 = checkHum();
      bot.sendMessage(chat_id, "GAS[1] reading is : " + String(value1));
      bot.sendMessage(chat_id, "GAS[2] reading is : " + String(value2));
      bot.sendMessage(chat_id, "Temprature reading is : " + String(value3));
      bot.sendMessage(chat_id, "Humidity reading is : " + String(value4));
    }

    if (text == "/options") {
      String keyboardJson = "[[\"/Sensor_Data\"]]";
      bot.sendMessageWithReplyKeyboard(chat_id, "Choose from one of the following options", "", keyboardJson, true);
    }

    if (text == "/start" || text == "/help") {
      String welcome = "Welcome to Universal Arduino Telegram Bot library, " + from_name + ".\n";
      welcome += "The following options are available.\n\n";
      welcome += "/Sensor_Data : to return the current sensors data\n";
      welcome += "/options : returns a custom reply keyboard\n";
      welcome += "/help : displays this message again\n";
      bot.sendMessage(chat_id, welcome, "Markdown");
    }
  }
}


// --- ----------------- ---

void loop() {

  //************************************************************************************************
  //-----------------------------------------------------------------------------
  //1.Read SOS button status
  if ( buttonPressedFlag ) {
    handleButtonPressed();
  }
  //-----------------------------------------------------------------------------
  //************************************************************************************************
  //-----------------------------------------------------------------------------
  //2.handel messages from telegram
  long now = millis();
  if (now >= checkTelegramDueTime) {
    Serial.println("---- Checking Telegram -----");
    int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    while (numNewMessages) {
      Serial.println("Bot recieved a message");
      handleNewMessages(numNewMessages);
      numNewMessages = bot.getUpdates(bot.last_message_received + 1);
    }
    checkTelegramDueTime = now + checkTelegramDelay;
  }
  //-----------------------------------------------------------------------------
  //************************************************************************************************
  //-----------------------------------------------------------------------------
  //3.Read gas sensor #1
  now = millis();
  if (now >= GAS_1_DueTime) {
    GAS_1_Value = checkGAS_1();
    if (GAS_1_Value > 200) {
      bot.sendMessage(defaultChatId, "GAS[1] detected " + String(GAS_1_Value));
      digitalWrite(redLED_PIN, 1);
      digitalWrite(blueLED_PIN, 0);
      digitalWrite(buzzer1_PIN, 1);
    }
    else if (GAS_1_Value < 200 && GAS_2_Value < 800 && temp_Value < 30 && hum_Value < 93) {
      digitalWrite(redLED_PIN, 0);
      digitalWrite(blueLED_PIN, 1);
      digitalWrite(buzzer1_PIN, 0);
    }
    GAS_1_DueTime = now + check_GAS_1_Delay;
  }
  //-----------------------------------------------------------------------------
  //************************************************************************************************
  //-----------------------------------------------------------------------------
  //4.Read gas sensor #2
  now = millis();
  if (now >= GAS_2_DueTime) {
    GAS_2_Value = checkGAS_2();
    if (GAS_2_Value > 800) {
      bot.sendMessage(defaultChatId, "GAS[2] detected " + String(GAS_2_Value));
      digitalWrite(redLED_PIN, 1);
      digitalWrite(blueLED_PIN, 0);
      digitalWrite(buzzer1_PIN, 1);
    }
    else if (GAS_1_Value < 200 && GAS_2_Value < 800 && temp_Value < 30 && hum_Value < 93) {
      digitalWrite(redLED_PIN, 0);
      digitalWrite(blueLED_PIN, 1);
      digitalWrite(buzzer1_PIN, 0);
    }
    GAS_2_DueTime = now + check_GAS_2_Delay;
  }
  //-----------------------------------------------------------------------------
  //************************************************************************************************
  //-----------------------------------------------------------------------------
  //5.Read temp/humidity sensor
  now = millis();
  if (now >= temp_DueTime) {
    temp_Value = checkTemp();
    hum_Value = checkHum();
    if (temp_Value > 30) {
      bot.sendMessage(defaultChatId, "HIGH Tempreture detected " + String(temp_Value));
      digitalWrite(redLED_PIN, 1);
      digitalWrite(greenLED_PIN, 0);
      digitalWrite(buzzer2_PIN, 1);
    }
    else if (GAS_1_Value < 200 && GAS_2_Value < 800 && temp_Value < 30 && hum_Value < 93) {
      digitalWrite(redLED_PIN, 0);
      digitalWrite(greenLED_PIN, 1);
      digitalWrite(buzzer2_PIN, 0);
    }
    if (hum_Value > 93) {
      digitalWrite(redLED_PIN, 1);
      digitalWrite(greenLED_PIN, 0);
      if (old_hum != hum_Value) {
        count = 0;
      }
      if (count < 5) {
        old_hum = hum_Value;
        count = count + 1;
        bot.sendMessage(defaultChatId, "HIGH Humidity detected " + String(hum_Value));
        digitalWrite(buzzer2_PIN, 1);
      }
      else {
        digitalWrite(buzzer2_PIN, 0);
      }
    }
    else if (GAS_1_Value < 200 && GAS_2_Value < 800 && temp_Value < 30 && hum_Value < 93) {
      digitalWrite(redLED_PIN, 0);
      digitalWrite(greenLED_PIN, 1);
      digitalWrite(buzzer2_PIN, 0);
    }
    temp_DueTime = now + check_temp_Delay;
  }
  //-----------------------------------------------------------------------------
  //************************************************************************************************
}//end of LOOP