#include <Wire.h>
#include <LiquidCrystal.h>

// Simulated data variables
float simulatedOxygenSaturation = 98.5;
int simulatedHeartRate = 75;
int simulatedBloodPressureSys = 120;
int simulatedBloodPressureDia = 80;
float simulatedTemperature = 98.6;

// Previous data variables for intrusion detection
float prevOxygenSaturation;
int prevHeartRate;
int prevBloodPressureSys;
int prevBloodPressureDia;
float prevTemperature;

// LCD setup
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);  // Adjust the pin numbers based on your setup

void setup() {
  lcd.begin(16, 2);
  lcd.print("Cardiology Patient");
  delay(2000);
  Serial.begin(9600);  // Set the Serial Monitor baud rate
}

void loop() {
  // Simulate data update
  simulateData();

  // Display simulated data on LCD
  displayData();

  // Simulate sending data to central monitoring system through Wi-Fi
  simulateDataTransmission();

  // Intrusion detection
  if (detectIntrusion()) {
    // Intrusion detected, handle accordingly
  }

  delay(2000); // Adjust the delay based on your simulation requirements
}

void simulateData() {
  // Store previous data for intrusion detection
  prevOxygenSaturation = simulatedOxygenSaturation;
  prevHeartRate = simulatedHeartRate;
  prevBloodPressureSys = simulatedBloodPressureSys;
  prevBloodPressureDia = simulatedBloodPressureDia;
  prevTemperature = simulatedTemperature;

  // Simulate changes in vital signs with larger random values for quicker changes
  simulatedOxygenSaturation += random(-5, 6);
  simulatedHeartRate += random(-10, 11);
  simulatedBloodPressureSys += random(-10, 11);
  simulatedBloodPressureDia += random(-5, 6);
  simulatedTemperature += random(-50, 51) / 10.0;

  // Ensure data stays within realistic ranges
  simulatedOxygenSaturation = constrain(simulatedOxygenSaturation, 95, 100);
  simulatedHeartRate = constrain(simulatedHeartRate, 60, 100);
  simulatedBloodPressureSys = constrain(simulatedBloodPressureSys, 100, 140);
  simulatedBloodPressureDia = constrain(simulatedBloodPressureDia, 70, 90);
  simulatedTemperature = constrain(simulatedTemperature, 97.0, 99.0);
}

void displayData() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("O2: ");
  lcd.print(simulatedOxygenSaturation);
  lcd.print("%  HR: ");
  lcd.print(simulatedHeartRate);
  lcd.setCursor(0, 1);
  lcd.print("BP: ");
  lcd.print(simulatedBloodPressureSys);
  lcd.print("/");
  lcd.print(simulatedBloodPressureDia);
  lcd.print("  Temp: ");
  lcd.print(simulatedTemperature);
}

void simulateDataTransmission() {
  Serial.print("Sending data to central system - ");
  Serial.print("O2: ");
  Serial.print(simulatedOxygenSaturation);
  Serial.print("%, HR: ");
  Serial.print(simulatedHeartRate);
  Serial.print(", BP: ");
  Serial.print(simulatedBloodPressureSys);
  Serial.print("/");
  Serial.print(simulatedBloodPressureDia);
  Serial.print(", Temp: ");
  Serial.println(simulatedTemperature);
}

bool detectIntrusion() {
  // Simulate a basic intrusion detection by checking for significant deviations
  float threshold = 2.0;  // Adjust the threshold based on your scenario

  if (abs(simulatedOxygenSaturation - prevOxygenSaturation) > threshold ||
      abs(simulatedHeartRate - prevHeartRate) > threshold ||
      abs(simulatedBloodPressureSys - prevBloodPressureSys) > threshold ||
      abs(simulatedBloodPressureDia - prevBloodPressureDia) > threshold ||
      abs(simulatedTemperature - prevTemperature) > threshold) {
    handleIntrusion();  // Call handleIntrusion when an intrusion is detected
    return true;  // Intrusion detected
  }

  return false;  // No intrusion
}

void handleIntrusion() {
  // Print a message to Serial Monitor to confirm that the function is called
  Serial.println("Handling Intrusion...");

  // Add code here to handle the intrusion, such as logging, alerting, or triggering security measures.

  // Example: Log intrusion to Serial Monitor
  Serial.print("Previous Data - O2: ");
  Serial.print(prevOxygenSaturation);
  Serial.print("%, HR: ");
  Serial.print(prevHeartRate);
  Serial.print(", BP: ");
  Serial.print(prevBloodPressureSys);
  Serial.print("/");
  Serial.print(prevBloodPressureDia);
  Serial.print(", Temp: ");
  Serial.println(prevTemperature);

  Serial.print("Current Data - O2: ");
  Serial.print(simulatedOxygenSaturation);
  Serial.print("%, HR: ");
  Serial.print(simulatedHeartRate);
  Serial.print(", BP: ");
  Serial.print(simulatedBloodPressureSys);
  Serial.print("/");
  Serial.print(simulatedBloodPressureDia);
  Serial.print(", Temp: ");
  Serial.println(simulatedTemperature);

  // Add additional actions such as sending alerts, triggering security measures, etc.
}