/*
 * Copyright (C) 2019 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.systemui.classifier.brightline;

import static com.android.systemui.classifier.Classifier.GENERIC;
import static com.android.systemui.classifier.Classifier.QUICK_SETTINGS;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import static org.mockito.Mockito.when;

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.testing.AndroidTestingRunner;
import android.testing.TestableLooper;
import android.view.MotionEvent;

import androidx.test.filters.SmallTest;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;

import java.lang.reflect.Field;

@SmallTest
@RunWith(AndroidTestingRunner.class)
@TestableLooper.RunWithLooper
public class ProximityClassifierTest extends ClassifierTest {

    private static final long NS_PER_MS = 1000000;

    @Mock
    private FalsingDataProvider mDataProvider;
    @Mock
    private DistanceClassifier mDistanceClassifier;
    private FalsingClassifier mClassifier;

    @Before
    public void setup() {
        super.setup();
        MockitoAnnotations.initMocks(this);
        when(mDataProvider.getInteractionType()).thenReturn(GENERIC);
        when(mDistanceClassifier.isLongSwipe()).thenReturn(false);
        mClassifier = new ProximityClassifier(mDistanceClassifier, mDataProvider);
    }

    @After
    public void tearDown() {
        super.tearDown();
    }

    @Test
    public void testPass_uncovered() {
        touchDown();
        touchUp(10);
        assertThat(mClassifier.isFalseTouch(), is(false));
    }

    @Test
    public void testPass_mostlyUncovered() {
        touchDown();
        mClassifier.onSensorEvent(createSensorEvent(true, 1));
        mClassifier.onSensorEvent(createSensorEvent(false, 2));
        touchUp(20);
        assertThat(mClassifier.isFalseTouch(), is(false));
    }

    @Test
    public void testPass_quickSettings() {
        touchDown();
        when(mDataProvider.getInteractionType()).thenReturn(QUICK_SETTINGS);
        mClassifier.onSensorEvent(createSensorEvent(true, 1));
        mClassifier.onSensorEvent(createSensorEvent(false, 11));
        touchUp(10);
        assertThat(mClassifier.isFalseTouch(), is(false));
    }

    @Test
    public void testFail_covered() {
        touchDown();
        mClassifier.onSensorEvent(createSensorEvent(true, 1));
        mClassifier.onSensorEvent(createSensorEvent(false, 11));
        touchUp(10);
        assertThat(mClassifier.isFalseTouch(), is(true));
    }

    @Test
    public void testFail_mostlyCovered() {
        touchDown();
        mClassifier.onSensorEvent(createSensorEvent(true, 1));
        mClassifier.onSensorEvent(createSensorEvent(true, 95));
        mClassifier.onSensorEvent(createSensorEvent(true, 96));
        mClassifier.onSensorEvent(createSensorEvent(false, 100));
        touchUp(100);
        assertThat(mClassifier.isFalseTouch(), is(true));
    }

    @Test
    public void testPass_coveredWithLongSwipe() {
        touchDown();
        mClassifier.onSensorEvent(createSensorEvent(true, 1));
        mClassifier.onSensorEvent(createSensorEvent(false, 11));
        touchUp(10);
        when(mDistanceClassifier.isLongSwipe()).thenReturn(true);
        assertThat(mClassifier.isFalseTouch(), is(false));
    }

    private void touchDown() {
        MotionEvent motionEvent = MotionEvent.obtain(1, 1, MotionEvent.ACTION_DOWN, 0, 0, 0);
        mClassifier.onTouchEvent(motionEvent);
        motionEvent.recycle();
    }

    private void touchUp(long duration) {
        MotionEvent motionEvent = MotionEvent.obtain(1, 1 + duration, MotionEvent.ACTION_UP, 0,
                100, 0);

        mClassifier.onTouchEvent(motionEvent);

        motionEvent.recycle();
    }

    private SensorEvent createSensorEvent(boolean covered, long timestampMs) {
        SensorEvent sensorEvent = Mockito.mock(SensorEvent.class);
        Sensor sensor = Mockito.mock(Sensor.class);
        when(sensor.getType()).thenReturn(Sensor.TYPE_PROXIMITY);
        when(sensor.getMaximumRange()).thenReturn(1f);
        sensorEvent.sensor = sensor;
        sensorEvent.timestamp = timestampMs * NS_PER_MS;
        try {
            Field valuesField = SensorEvent.class.getField("values");
            valuesField.setAccessible(true);
            float[] sensorValue = {covered ? 0 : 1};
            try {
                valuesField.set(sensorEvent, sensorValue);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }

        return sensorEvent;
    }
}