#include <WiFi.h>
#include <HTTPClient.h>
#include "DHTesp.h"

WiFiClient client;

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const int DHT_PIN = 15;
DHTesp dhtSensor;

String patient_username = ""; // Variable to store patient's username

void setup() {
  Serial.begin(9600);

  WiFi.disconnect();
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  // Prompt user to enter patient's username
  Serial.println("Please enter the patient's username:");
}

void loop() {
  if (Serial.available() > 0) {
    char c = Serial.read();
    if (c != '\n') {
      patient_username += c;
    } else {
      Serial.println("Patient username entered: " + patient_username);
      send_data_to_api();
      patient_username = ""; // Reset the variable for the next input
      Serial.println("Please enter the patient's username:");
    }
  }
}

void send_data_to_api() {
  // Read sensor data (replace with actual sensor readings)
  int systolic_pressure = random(70, 90);
  int diastolic_pressure = random(110, 150);
  int blood_oxygen = random(85, 100);
  float temperature = random(360, 380) / 10.0;
  int heart_rate = random(50, 100);
  unsigned long timestamp = millis(); // Current time in milliseconds

  // Construct payload
  String payload = "{\"patient_username\":\"" + patient_username + "\"" +
                   ",\"timestamp\":\"" + String(timestamp) + "\"" +
                   ",\"blood_pressure\":\"" + String(systolic_pressure) + "/" + String(diastolic_pressure) + "\"" +
                   ",\"heart_rate\":\"" + String(heart_rate) + "\"" +
                   ",\"o2\":\"" + String(blood_oxygen) + "\"" +
                   ",\"temperature\":\"" + String(temperature) + "\"}";

  // Print sensor data and timestamp
  Serial.print("Sending data to API: ");
  Serial.println("https://digicarebackend.onrender.com/api/record-data/" + patient_username);
  Serial.print("Payload: ");
  Serial.println(payload);

  // Send HTTP request to API
  HTTPClient http;
  String api_url = "https://digicarebackend.onrender.com/api/record-data/" + patient_username;
  http.begin(api_url);
  http.addHeader("Content-Type", "application/json");
  int httpCode = http.POST(payload);

  // Check HTTP response
  if (httpCode > 0) {
    Serial.print("HTTP response code: ");
    Serial.println(httpCode);

    String response = http.getString();
    Serial.println("Response:");
    Serial.println(response);
  } else {
    Serial.print("HTTP request failed with error code: ");
    Serial.println(httpCode);

    // Print error details
    String error = http.errorToString(httpCode);
    Serial.print("Error: ");
    Serial.println(error);
  }

  http.end();
}