#include <WiFi.h>
#include <Wire.h>
#include <HTTPClient.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>

// WiFi (Wokwi or real)
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// ThingSpeak
String apiKey = "YOUR_API_KEY";
const char* server = "http://api.thingspeak.com/update";

// MPU6050
Adafruit_MPU6050 mpu;

// Variables
float speed = 0;
float dt = 0.1; // time interval

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);

  // WiFi connect
  WiFi.begin(ssid, password);
  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected!");

  // MPU6050 init
  if (!mpu.begin()) {
    Serial.println("MPU6050 not found!");
    while (1);
  }

  Serial.println("MPU6050 Ready!");
}

void loop() {

  sensors_event_t a, g, temp;
  mpu.getEvent(&a, &g, &temp);

  float accX = a.acceleration.x;
  float accY = a.acceleration.y;
  float accZ = a.acceleration.z;

  float gyroX = g.gyro.x;
  float gyroY = g.gyro.y;
  float gyroZ = g.gyro.z;

  // 🚗 TURN DETECTION
  String turn = "Straight";
  if (gyroZ > 1.2) turn = "Right";
  else if (gyroZ < -1.2) turn = "Left";

  // 🚨 BRAKING
  String brake = "No Brake";
  if (accY < -6) brake = "Hard Brake";
  else if (accY < -3) brake = "Normal Brake";

  // ⚠️ TILT (Roll & Pitch)
  float roll  = atan2(accY, accZ) * 180 / PI;
  float pitch = atan2(-accX, sqrt(accY*accY + accZ*accZ)) * 180 / PI;

  String tilt = "Normal";
  if (abs(roll) > 25 || abs(pitch) > 25) tilt = "Tilt Detected";

  // 🔄 ORIENTATION CHANGE
  String orientation = "Stable";
  if (abs(gyroX) > 1.5 || abs(gyroY) > 1.5)
    orientation = "Changed";

  // ⚡ SPEED (approx)
  speed = speed + (accY * dt);

  // 📊 Print data
  Serial.println("----- DATA -----");
  Serial.print("Turn: "); Serial.println(turn);
  Serial.print("Brake: "); Serial.println(brake);
  Serial.print("Tilt: "); Serial.println(tilt);
  Serial.print("Orientation: "); Serial.println(orientation);
  Serial.print("Speed: "); Serial.println(speed);

  // 🌐 Send to ThingSpeak
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;

    String url = server;
    url += "?api_key=" + apiKey;
    url += "&field1=" + String(accX);
    url += "&field2=" + String(accY);
    url += "&field3=" + String(gyroZ);
    url += "&field4=" + String(speed);
    url += "&field5=" + String(roll);
    url += "&field6=" + String(pitch);

    http.begin(url);
    int httpCode = http.GET();

    Serial.print("HTTP: ");
    Serial.println(httpCode);

    http.end();
  }

  delay(15000); // ThingSpeak limit
}