#include <Arduino.h>
#include <ArduinoJson.h>
#include <HTTPClient.h>
#include <WiFi.h>
#include <time.h>

// WiFi SimulatorCredentials
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

#define DATABASE_URL "https://healthguard-wokwi-default-rtdb.firebaseio.com/.json"

#define HRS_PIN 13


// Create HTTP Client
HTTPClient client;

// Display Configuration


// Operation Variables
String payload = "";

String sensorID = "HC001";
char timeStringBuffer[20];

void setup() {
  // Setup code to run once
  Serial.begin(115200);

  // LCD setup
  

  pinMode(HRS_PIN, INPUT);


  // WiFi setup
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  delay(500);
  lcd.setCursor(0, 0);
  lcd.print("Connecting to");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }

  // Status Database Connectivity
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.println("WiFi Connected");
  delay(1000);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.println("Connecting to");
  lcd.setCursor(0, 1);
  lcd.println("Firebase...");

  // Perform connection
  client.begin(DATABASE_URL);
  int httpResponseCode = client.GET();

  if (httpResponseCode > 0) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.println("Connected");
    payload = client.getString();
  }

  // Timer Client Configuration
  configTime(0, 0, "pool.ntp.org");
}

void loop() {
  // Simulated sensor values


  float bodyTemperature = 36.5;  // Example value
  int breathRate = 19;           // Example value
  int heartRate = 100;
  int oxygenLevel = 100;          // Example value

  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    Serial.println("Time Error");
    return;
  }

  strftime(timeStringBuffer, sizeof(timeStringBuffer), "%d/%m/%Y %H:%M", &timeinfo);
  Serial.println(String(timeStringBuffer));

// Create JSON object
StaticJsonDocument<200> jsonDoc;
JsonObject healthData = jsonDoc.createNestedObject("HealthData");
healthData["time"] = String(timeStringBuffer);
healthData["bodyTemperature"] = bodyTemperature;
healthData["breathRate"] = breathRate;
healthData["heartRate"] = heartRate;
healthData["oxygenLevel"] = oxygenLevel;


  String jsonData;
  serializeJson(jsonDoc, jsonData);

  // Send information to Database
  client.begin(DATABASE_URL);
  client.addHeader("Content-Type", "application/json");
  int httpResponseCode = client.PATCH(jsonData);

  if (httpResponseCode > 0) {
    String response = client.getString();
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    Serial.print("Response from server: ");
    Serial.println(response);
  } else {
    Serial.print("Error on sending PATCH: ");
    Serial.println(httpResponseCode);
    Serial.print("Error details: ");
    Serial.println(client.errorToString(httpResponseCode).c_str());
  }

  client.end(); // Free resources

  // Display data on LCD

  delay(6000); // Send data every minute
}