#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <WiFi.h>
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>
#include <WiFiClientSecure.h>

// Inisialisasi pin untuk LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Pin analog untuk sensor NTC
const int ntcPin1 = 35;
const int ntcPin2 = 32;

unsigned long displayStartTime = 0, wifiRead = 0;
int displayState = 0;

const char* ssid = "Wokwi-GUEST";
const char* pw = "";
// Telegram BOT
#define BOTtoken "7371004070:AAFHlpd_OBfGfNzACMK1zRqXD5rmmHUzOBs"
#define CHAT_ID "1523471432"
// #define BOTtoken "7299414967:AAER90giRcYXo9Ezl6Pitq2X2I8JGu1KF1o"
//#define BOTtoken "6628232016:AAHl9M9mLf6jcfCn2t3vmPpj0CsCmvgOVl8"

//#define CHAT_ID "1290007560"

//#define CHAT_ID2 "1523471432"

WiFiClient espClient;
WiFiClientSecure client;
UniversalTelegramBot bot(BOTtoken, client);

// Cek Pesan Setiap 1 detik
int interval = 1000;
unsigned long waktu_terakhir = 0, Waktubaca = 0;

bool wifiConnected = false;

void setup() {
  Serial.begin(115200); // Initialize serial communication

  // Menggunakan WiFiManager untuk menghubungkan WiFi
  lcd.init();
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("Delta Temp");
  lcd.setCursor(0,1);
  lcd.print("Wifi Connecting");

  // Hubungkan ke Wi-Fi
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pw);
  client.setCACert(TELEGRAM_CERTIFICATE_ROOT);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Sedang menghubungkan ke WiFi..");
  }
  
  wifiConnected = true;
  // IP Address
  Serial.println(WiFi.localIP());
  Serial.print("Atur Waktu: ");
  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 loop() {

  // Membaca nilai ADC dari sensor NTC
  int adcValue1 = analogRead(ntcPin1);
  int adcValue2 = analogRead(ntcPin2);

  // Menghitung suhu dari nilai ADC
  float temp1 = calculateTemperature1(adcValue1);
  float temp2 = calculateTemperature2(adcValue2);

  Serial.println(temp1);
  Serial.println(temp2);

  // Menghitung perbedaan suhu menggunakan fungsi yang sudah dibuat
  float diffTemp = calculateDiffTemp(temp1, temp2);
  float diffTempF = calculateDiffTempF(temp1, temp2);
  Serial.println(String(diffTemp) + " C");
  Serial.println(String(diffTempF) + " F");

  // Menampilkan perbedaan suhu di baris kedua LCD
  if (millis() - displayStartTime >= 4000) {
    displayState = (displayState + 1) % 2;
    displayStartTime = millis();
    lcd.clear();
  }

  switch (displayState) {
    case 0:
      lcd.setCursor(0, 0);
      lcd.print("Delta Temp");
      lcd.setCursor(0, 1);
      lcd.print(diffTemp);
      lcd.setCursor(5, 1);
      lcd.print((char)223); // Simbol derajat
      lcd.print("C");

      lcd.setCursor(8, 1);
      lcd.print(diffTempF);
      lcd.setCursor(14, 1);
      lcd.print((char)223);
      lcd.print("F");
      break;

    case 1:
      lcd.setCursor(0, 0);
      lcd.print("T1 = ");
      lcd.print(temp1);
      lcd.setCursor(12, 0);
      lcd.print((char)223); // Simbol derajat
      lcd.print("C");

      lcd.setCursor(0, 1);
      lcd.print("T2 = ");
      lcd.print(temp2);
      lcd.setCursor(12, 1);
      lcd.print((char)223); // Simbol derajat
      lcd.print("C");
      break;
  }

  if (wifiConnected) {
    cek_pesan();
  } else {
    lcd.setCursor(0, 0);
    lcd.print("Delta Temp");
    lcd.setCursor(0,1);
    lcd.print("Wifi Connecting");

  }
  delay(200);
}

// Cek Pesan Terbaru
void cek_pesan() {
  if (millis() > waktu_terakhir + interval) {
    int banyakPesan = bot.getUpdates(bot.last_message_received + 1);

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

// Memproses pesan yang diterima
void handleNewMessages(int numNewMessages) {
  for (int i = 0; i < numNewMessages; i++) {

    // Cek Chat ID
    String chat_id = String(bot.messages[i].chat_id);
    if (chat_id != CHAT_ID) {
      bot.sendMessage(chat_id, "Unauthorized user", "");
      continue;
    }

    // Terima pesan dari telegram
    String text = bot.messages[i].text;
    Serial.println(text);

    String from_name = bot.messages[i].from_name;

    if (text == "/start") {
      String welcome = "Welcome, " + from_name + ".\n";
      welcome += "Use the following commands to get delta temp radiator data unit.\n\n";
      welcome += "/temp_x (x = unit name)\n";
      bot.sendMessage(chat_id, welcome, "");
    }

    if (text == "/temp_EX3018") {
      String test = getReadings();
      bot.sendMessage(chat_id, test);
    }
  }
}

float calculateTemperature1(int adcValue1) {
  // Temperature calculation logic
  const float referenceVoltage = 3.3;
  const float referenceResistor = 10000; // the 'other' resistor
  const float beta = 3950; // Beta value (Typical Value)
  const float nominalTemperature = 32.2; // Nominal temperature for calculating the temperature coefficient
  const float nominalResistance = 6277.59; // Resistance value at nominal temperature

  float voltage = (adcValue1 * referenceVoltage) / 4095.0; // Calculate voltage
  float resistance = (voltage * referenceResistor) / (referenceVoltage - voltage); // Calculate thermistor resistance with updated configuration

  Serial.print("Resistance: ");
  Serial.print(resistance);
  Serial.println(" ohms");

  // Calculate temperature using the Beta parameter equation
  float tempK = 1 / (((log(resistance / nominalResistance)) / beta) + (1 / (nominalTemperature + 273.15)));

  float temperature = tempK - 273.15; // Get temperature in Celsius

  if (temperature >= 65){
  const float referenceVoltage = 3.3;
  const float referenceResistor = 10000; // the 'other' resistor
  const float beta = 3950; // Beta value (Typical Value)
  const float nominalTemperature = 100; // Nominal temperature for calculating the temperature coefficient
  const float nominalResistance = 270; // Resistance value at nominal temperature

  float voltage = (adcValue1 * referenceVoltage) / 4095.0; // Calculate voltage
  float resistance = (voltage * referenceResistor) / (referenceVoltage - voltage); // Calculate thermistor resistance with updated configuration

  Serial.print("Resistance: ");
  Serial.print(resistance);
  Serial.println(" ohms");

  // Calculate temperature using the Beta parameter equation
  float tempK = 1 / (((log(resistance / nominalResistance)) / beta) + (1 / (nominalTemperature + 273.15)));

  float temperature = tempK - 273.15; // Get temperature in Celsius

  return temperature;
  }
  return temperature;
}

float calculateTemperature2(int adcValue2) {
  // Temperature calculation logic
  const float referenceVoltage = 3.3;
  const float referenceResistor = 10000 ; // the 'other' resistor
  const float beta = 3950; // Beta value (Typical Value)
  const float nominalTemperature = 32.2; // Nominal temperature for calculating the temperature coefficient
  const float nominalResistance = 6277.59; // Resistance value at nominal temperature

  float voltage = (adcValue2 * referenceVoltage) / 4095.0; // Calculate voltage
  float resistance = (voltage * referenceResistor) / (referenceVoltage - voltage); // Calculate thermistor resistance with updated configuration

  Serial.print("Resistance: ");
  Serial.print(resistance);
  Serial.println(" ohms");

  // Calculate temperature using the Beta parameter equation
  float tempK = 1 / (((log(resistance / nominalResistance)) / beta) + (1 / (nominalTemperature + 273.15)));

  float temperature = tempK - 273.15; // Get temperature in Celsius

  if (temperature >= 65){
    const float referenceVoltage = 3.3;
  const float referenceResistor = 10000; // the 'other' resistor
  const float beta = 3950; // Beta value (Typical Value)
  const float nominalTemperature = 100; // Nominal temperature for calculating the temperature coefficient
  const float nominalResistance = 270; // Resistance value at nominal temperature

  float voltage = (adcValue2 * referenceVoltage) / 4095.0; // Calculate voltage
  float resistance = (voltage * referenceResistor) / (referenceVoltage - voltage); // Calculate thermistor resistance with updated configuration

  Serial.print("Resistance: ");
  Serial.print(resistance);
  Serial.println(" ohms");

  // Calculate temperature using the Beta parameter equation
  float tempK = 1 / (((log(resistance / nominalResistance)) / beta) + (1 / (nominalTemperature + 273.15)));

  float temperature = tempK - 273.15; // Get temperature in Celsius

  return temperature;
  }
  return temperature;
}

// Fungsi untuk menghitung selisih temperatur dalam Celcius
float calculateDiffTemp(float temp1, float temp2) {
  return fabs(temp1 - temp2);
}

// Fungsi untuk menghitung selisih temperatur dalam Fahrenheit
float calculateDiffTempF(float temp1, float temp2) {
  float diffTemp = calculateDiffTemp(temp1, temp2);
  return (diffTemp * 1.8) + 32;
}

// Fungsi utama untuk mendapatkan pembacaan dan mengembalikan pesan string
String getReadings() {

  if (millis()-Waktubaca >= 170){
    Waktubaca = millis();
  int adcValue1 = analogRead(ntcPin1);
  int adcValue2 = analogRead(ntcPin2);

  // Menghitung suhu dari nilai ADC
  float temp1 = calculateTemperature1(adcValue1);
  float temp2 = calculateTemperature2(adcValue2);

  Serial.println(temp1);
  Serial.println(temp2);

  // Menghitung perbedaan suhu menggunakan fungsi yang sudah dibuat
  float diffTemp = calculateDiffTemp(temp1, temp2);
  float diffTempF = calculateDiffTempF(temp1, temp2);
  Serial.println(diffTemp);
  Serial.println(diffTempF);
  String message = "Unit EX3018 \n";
  message += "Radiator Temp Status: \n";
  message += "T1: " + String(temp1) + " ºC \n";
  message += "T2: " + String(temp2) + " ºC \n";
  message += "Delta: " + String(diffTemp) + " ºC ; " + String(diffTempF) + " ºF \n";

  return message;
  }
}