#include <Arduino.h>
#include <ArduinoJson.h>
#include <HTTPClient.h>
#include <math.h>

#include <WiFi.h>
#include <time.h>

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

#define DATABASE_URL "https://upcpre202401si572sandbox-default-rtdb.firebaseio.com/.json"

#define HRS_PIN 33
#define BT_PIN 32
#define OL_PIN 35
#define BR_PIN 34

// 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);

  pinMode(HRS_PIN, INPUT);
  pinMode(BT_PIN, INPUT);
  pinMode(OL_PIN, INPUT);
  pinMode(BR_PIN, INPUT);
  
  
  


  // WiFi setup
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  delay(500);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
  // Perform connection
  client.begin(DATABASE_URL);
  int httpResponseCode = client.GET();

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

void loop() {
  // Simulated sensor values


  int HRS_ANALOG_X = analogRead(HRS_PIN);
  int HRS_scaledValue = map(HRS_ANALOG_X, 0, 4095, 0, 200);

  int BT_ANALOG_X = analogRead(BT_PIN); 
  float BT_scaledValue = (BT_ANALOG_X / 4095.0) * (45.0 - 20.0) + 20.0;

  int OL_ANALOG_X = analogRead(OL_PIN);
  int OL_scaledValue = map(OL_ANALOG_X, 0, 4095, 0, 100);

  int BR_ANALOG_X = analogRead(BR_PIN);
  int BR_scaledValue = map(BR_ANALOG_X, 0, 4095, 0, 30);


  float bodyTemperature = ((int)(BT_scaledValue * 100 + .5) / 100.0);  // Example value
  int breathRate = BR_scaledValue;           // Example value
  int heartRate = HRS_scaledValue;
  int oxygenLevel = OL_scaledValue;          // Example value
  
  int sensorValue = analogRead(HRS_PIN);
  Serial.println(sensorValue);

  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

  delay(1000); // Send data every minute
}