package com.cloudit.dashmatic.util.manager;

import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;

import com.cloudit.dashmatic.exception.BluetoothException;

/**
 * Created by tuule on 26.07.16.
 */
public class PermissionManager {
    private static PermissionManager ourInstance = new PermissionManager();
    private Activity activity;

    private static final int BLUETOOTH_PERMISSION = 141234;
    private OnPermissionCallback bluetoothCallback;

    public static PermissionManager getInstance() {
        return ourInstance;
    }

    private PermissionManager() {
    }

    public void init(Activity activity) {
        this.activity = activity;
    }

    public void processWithBluetoothPermissionRequest(OnPermissionCallback onPermissionCallback) {
        this.bluetoothCallback = onPermissionCallback;
        if (ContextCompat.checkSelfPermission(activity,
                Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(activity,
                    new String[]{Manifest.permission.READ_CONTACTS},
                    BLUETOOTH_PERMISSION);
        } else {
            if (onPermissionCallback != null) {
                onPermissionCallback.onPermissionGranted();
            }
        }
    }

    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case BLUETOOTH_PERMISSION: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    // permission was granted, yay! Do the
                    // contacts-related task you need to do.
                    if (bluetoothCallback != null) {
                        bluetoothCallback.onPermissionGranted();
                    }

                } else {

                    if (bluetoothCallback != null) {
                        bluetoothCallback.onPermissionDenied();
                    }
                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                }
                return;
            }

            // other 'case' lines to check for other
            // permissions this app might request
        }
    }



    public interface OnPermissionCallback {
        void onPermissionGranted() throws BluetoothException;
        void onPermissionDenied() throws BluetoothException;
    }
}