#include "Wire.h" // This library allows you to communicate with I2C devices.

const int MPU_ADDR = 0x68; // I2C address of the MPU-6050. If AD0 pin is set to HIGH, the I2C address will be 0x69.

int16_t accelerometer_x, accelerometer_y, accelerometer_z; // variables for accelerometer raw data
int16_t gyro_x, gyro_y, gyro_z; // variables for gyro raw data
int16_t temperature; // variables for temperature data

char tmp_str[7]; // temporary variable used in convert function

int state = 0;

char* convert_int16_to_str(int16_t i) { // converts int16 to string. Moreover, resulting strings will have the same length in the debug monitor.
  sprintf(tmp_str, "%6d", i);
  return tmp_str;
}

void setup() {
  Serial.begin(9600);
  Wire.begin();
  Wire.beginTransmission(MPU_ADDR); // Begins a transmission to the I2C slave (GY-521 board)
  Wire.write(0x6B); // PWR_MGMT_1 register
  Wire.write(0); // set to zero (wakes up the MPU-6050)
  Wire.endTransmission(true);
  pinMode(2, OUTPUT);
}
void loop() {
  Wire.beginTransmission(MPU_ADDR);
  Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H) [MPU-6000 and MPU-6050 Register Map and Descriptions Revision 4.2, p.40]
  Wire.endTransmission(false); // the parameter indicates that the Arduino will send a restart. As a result, the connection is kept active.
  Wire.requestFrom(MPU_ADDR, 7 * 2, true); // request a total of 7*2=14 registers

  // "Wire.read()<<8 | Wire.read();" means two registers are read and stored in the same variable
  accelerometer_x = Wire.read() << 8 | Wire.read(); // reading registers: 0x3B (ACCEL_XOUT_H) and 0x3C (ACCEL_XOUT_L)
  accelerometer_y = Wire.read() << 8 | Wire.read(); // reading registers: 0x3D (ACCEL_YOUT_H) and 0x3E (ACCEL_YOUT_L)
  accelerometer_z = Wire.read() << 8 | Wire.read(); // reading registers: 0x3F (ACCEL_ZOUT_H) and 0x40 (ACCEL_ZOUT_L)
  temperature = Wire.read() << 8 | Wire.read(); // reading registers: 0x41 (TEMP_OUT_H) and 0x42 (TEMP_OUT_L)
  gyro_x = Wire.read() << 8 | Wire.read(); // reading registers: 0x43 (GYRO_XOUT_H) and 0x44 (GYRO_XOUT_L)
  gyro_y = Wire.read() << 8 | Wire.read(); // reading registers: 0x45 (GYRO_YOUT_H) and 0x46 (GYRO_YOUT_L)
  gyro_z = Wire.read() << 8 | Wire.read(); // reading registers: 0x47 (GYRO_ZOUT_H) and 0x48 (GYRO_ZOUT_L)


  // Implement shake gesture detection logic
  if (isShake(accelerometer_x, accelerometer_y, accelerometer_z)) {
    // Perform actions when shake is detected
    Serial.println("Shake detected!");
    if (state == 1) {
      digitalWrite(2, LOW);
      state = 0;
    }
    else {
      state = 0;
      digitalWrite(2, HIGH);
    }
  }

  if (isLeftTilt(gyro_x, gyro_y, gyro_z)) {
    // Perform actions when shake is detected
    Serial.println("Tilting Left!");
    // Add your code to trigger actions here
  }

  // delay
  delay(1000);

  Serial.println(abs(-130));
}

bool isShake(int16_t x, int16_t y, int16_t z) {
  // Implement your Tilt left detection algorithm here
  // Example: detect if the total acceleration change exceeds a threshold
  int16_t totalAccelChange = abs(x) + abs(y) + abs(z);
  Serial.println(totalAccelChange);
  return totalAccelChange > 16384;
}

bool isLeftTilt(int16_t x, int16_t y, int16_t z) {
  // Implement your shake detection algorithm here
  // Example: detect if the total acceleration change exceeds a threshold
  int16_t totalAccelChange = abs(x) + abs(y) + abs(z);
  Serial.println(y);
  return y < 0;
}