/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.server.connectivity.tethering;

import android.hardware.tetheroffload.control.V1_0.IOffloadControl;
import android.hardware.tetheroffload.control.V1_0.IOffloadControl.stopOffloadCallback;
import android.os.RemoteException;
import android.util.Log;


/**
 * Capture tethering dependencies, for injection.
 *
 * @hide
 */
public class OffloadHardwareInterface {
    private static final String TAG = OffloadHardwareInterface.class.getSimpleName();

    private static native boolean configOffload();

    private IOffloadControl mOffloadControl;

    public OffloadHardwareInterface() {}

    public boolean initOffloadConfig() {
        return configOffload();
    }

    // TODO: Extend this to take a TetheringControlCallback for registration.
    public boolean initOffloadControl() {
        if (mOffloadControl == null) {
            try {
                mOffloadControl = IOffloadControl.getService();
            } catch (RemoteException e) {
                Log.d(TAG, "tethering offload control not supported: " + e);
                return false;
            }
        }

        // TODO: call mOffloadControl.initOffload(...callback...);

        return true;
    }

    public void stopOffloadControl() {
        if (mOffloadControl == null) return;

        try {
            final stopOffloadCallback cb = new stopOffloadCallback() {
                @Override
                public void onValues(boolean success, String errMsg) {
                    if (success) return;

                    Log.e(TAG, "stopOffload failed: " + errMsg);
                }
            };
            mOffloadControl.stopOffload(cb);
        } catch (RemoteException e) {
            Log.d(TAG, "failed to stopOffload: " + e);
        }
        mOffloadControl = null;
    }
}