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

#define MPU6050_ADDR 0x68

// Define threshold values for gestures
#define THRESHOLD_X 15000
#define THRESHOLD_Y 15000
#define THRESHOLD_Z 15000

const char* ssid = "Galaxy A13 0634";
const char* password = "Thenmozhi24";
const char* serverURL = " https://ca07-2409-40f4-2040-bc04-4414-a5d0-3671-4108.ngrok-free.app ";  // Replace with your actual ngrok URL

void setup() {
  Serial.begin(115200);
  Wire.begin();

  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Wake up the MPU6050
  Wire.beginTransmission(MPU6050_ADDR);
  Wire.write(0x6B);  // PWR_MGMT_1 register
  Wire.write(0);     // Wake up MPU6050
  Wire.endTransmission(true);
}

void loop() {
  delay(100);
  // Read accelerometer data
  Wire.beginTransmission(MPU6050_ADDR);
  Wire.write(0x3B);  // Starting with register 0x3B (ACCEL_XOUT_H)
  Wire.endTransmission(false);
  Wire.requestFrom(MPU6050_ADDR, 6, true);

  int16_t ax = Wire.read() << 8 | Wire.read();
  int16_t ay = Wire.read() << 8 | Wire.read();
  int16_t az = Wire.read() << 8 | Wire.read();

  // Read gyroscope data
  Wire.beginTransmission(MPU6050_ADDR);
  Wire.write(0x43);  // Starting with register 0x43 (GYRO_XOUT_H)
  Wire.endTransmission(false);
  Wire.requestFrom(MPU6050_ADDR, 6, true);

  int16_t gx = Wire.read() << 8 | Wire.read();
  int16_t gy = Wire.read() << 8 | Wire.read();
  int16_t gz = Wire.read() << 8 | Wire.read();

  // Gesture detection and action mapping
  String gesturePayload;

  if (ax > THRESHOLD_X) {
    Serial.println("Next Track");
    gesturePayload = "{\"gesture\":\"next_track\"}";
  } else if (ax < -THRESHOLD_X) {
    Serial.println("Previous Track");
    gesturePayload = "{\"gesture\":\"previous_track\"}";
  } else if (ay > THRESHOLD_Y) {
    Serial.println("Volume Up");
    gesturePayload = "{\"gesture\":\"volume_up\"}";
  } else if (ay < -THRESHOLD_Y) {
    Serial.println("Volume Down");
    gesturePayload = "{\"gesture\":\"volume_down\"}";
  } else if (az > THRESHOLD_Z) {
    Serial.println("Next Playlist");
    gesturePayload = "{\"gesture\":\"next_playlist\"}";
  } else if (az < -THRESHOLD_Z) {
    Serial.println("Previous Playlist");
    gesturePayload = "{\"gesture\":\"previous_playlist\"}";
  } else if (gz > THRESHOLD_Z) {
    Serial.println("Play/Pause Toggle");
    gesturePayload = "{\"gesture\":\"play_pause\"}";
  }

  // Send gesture data to the server
  if (WiFi.status() == WL_CONNECTED && !gesturePayload.isEmpty()) {
    HTTPClient http;
    http.begin(serverURL);
    http.addHeader("Content-Type", "application/json");

    int httpResponseCode = http.POST(gesturePayload);

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println(httpResponseCode);
      Serial.println(response);
    } else {
      Serial.print("Error on sending POST request: ");
      Serial.println(httpResponseCode);
    }

    http.end();
  }

  delay(500);
}