/*
 * 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.settings.bluetooth;

import static com.google.common.truth.Truth.assertThat;

import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.verify;

import android.bluetooth.BluetoothAdapter;
import android.content.Context;
import android.content.Intent;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.robolectric.RobolectricTestRunner;

@RunWith(RobolectricTestRunner.class)
public class AlwaysDiscoverableTest {

    @Mock
    private Context mContext;

    private AlwaysDiscoverable mAlwaysDiscoverable;
    private BluetoothAdapter mBluetoothAdapter;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        mAlwaysDiscoverable = new AlwaysDiscoverable(mContext);
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    }

    @Test
    public void isStartedWithoutStart() {
        assertThat(mAlwaysDiscoverable.mStarted).isFalse();
    }

    @Test
    public void isStartedWithStart() {
        mAlwaysDiscoverable.start();
        assertThat(mAlwaysDiscoverable.mStarted).isTrue();
    }

    @Test
    public void isStartedWithStartStop() {
        mAlwaysDiscoverable.start();
        mAlwaysDiscoverable.stop();
        assertThat(mAlwaysDiscoverable.mStarted).isFalse();
    }

    @Test
    public void stopWithoutStart() {
        mAlwaysDiscoverable.stop();
        // expect no crash
        mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE);
    }

    @Test
    public void startSetsModeAndRegistersReceiver() {
        mBluetoothAdapter.setScanMode(BluetoothAdapter.SCAN_MODE_NONE);
        mAlwaysDiscoverable.start();
        assertThat(mBluetoothAdapter.getScanMode())
                .isEqualTo(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
        verify(mContext).registerReceiver(eq(mAlwaysDiscoverable), any(),
                eq(Context.RECEIVER_EXPORTED_UNAUDITED));
    }

    @Test
    public void stopUnregistersReceiver() {
        mAlwaysDiscoverable.start();
        mAlwaysDiscoverable.stop();
        verify(mContext).unregisterReceiver(mAlwaysDiscoverable);
    }

    @Test
    public void resetsToDiscoverableModeWhenScanModeChanges() {
        mAlwaysDiscoverable.start();
        assertThat(mBluetoothAdapter.getScanMode())
                .isEqualTo(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);

        sendScanModeChangedIntent(BluetoothAdapter.SCAN_MODE_CONNECTABLE,
                BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);

        assertThat(mBluetoothAdapter.getScanMode())
                .isEqualTo(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
    }

    private void sendScanModeChangedIntent(int newMode, int previousMode) {
        mBluetoothAdapter.setScanMode(newMode);
        Intent intent = new Intent(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
        intent.putExtra(BluetoothAdapter.EXTRA_SCAN_MODE, newMode);
        intent.putExtra(BluetoothAdapter.EXTRA_PREVIOUS_SCAN_MODE, previousMode);
        mAlwaysDiscoverable.onReceive(mContext, intent);
    }
}