package com.plustwo.RCTCamera;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.view.Surface;

import com.facebook.react.bridge.ReactApplicationContext;

interface RCTSensorOrientationListener {
  void orientationEvent();
}

public class RCTSensorOrientationChecker {
  int mOrientation = 0;
  private SensorEventListener mSensorEventListener;
  private SensorManager mSensorManager;
  private RCTSensorOrientationListener mListener = null;

  public RCTSensorOrientationChecker( ReactApplicationContext reactContext) {
    mSensorEventListener = new Listener();
    mSensorManager = (SensorManager) reactContext.getSystemService(Context.SENSOR_SERVICE);
  }

  /**
   * Call on activity onResume()
   */
  public void onResume() {
    mSensorManager.registerListener(mSensorEventListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
  }

  /**
   * Call on activity onPause()
   */
  public void onPause() {
    mSensorManager.unregisterListener(mSensorEventListener);
  }

  private class Listener implements SensorEventListener {
    @Override
    public void onSensorChanged(SensorEvent event) {
      float x = event.values[0];
      float y = event.values[1];

      if (x<5 && x>-5 && y > 5)
        mOrientation = Surface.ROTATION_0; // portrait
      else if (x<-5 && y<5 && y>-5)
        mOrientation = Surface.ROTATION_270; // right
      else if (x<5 && x>-5 && y<-5)
        mOrientation = Surface.ROTATION_180; // upside down
      else if (x>5 && y<5 && y>-5)
        mOrientation = Surface.ROTATION_90; // left

      if (mListener != null) {
        mListener.orientationEvent();
      }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

    }
  }

  public int getOrientation() {
    return mOrientation;
  }

  public void registerOrientationListener(RCTSensorOrientationListener listener) {
    this.mListener = listener;
  }

  public void unregisterOrientationListener() {
    mListener = null;
  }
}