/*
 * Copyright (C) 2020 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;

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

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

import static org.mockito.Mockito.when;

import android.view.MotionEvent;

import androidx.test.ext.junit.runners.AndroidJUnit4;
import androidx.test.filters.SmallTest;

import com.android.systemui.plugins.FalsingManager;
import com.android.systemui.util.DeviceConfigProxyFake;

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

@SmallTest
@RunWith(AndroidJUnit4.class)
public class ProximityClassifierTest extends ClassifierTest {

    private static final long NS_PER_MS = 1000000;

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

    private final FalsingClassifier.Result mFalsedResult =
            FalsingClassifier.Result.falsed(1, getClass().getSimpleName() , "test");
    private final FalsingClassifier.Result mPassedResult = FalsingClassifier.Result.passed(1);

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

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

    @Test
    public void testPass_uncovered() {
        touchDown();
        touchUp(10);
        assertThat(mClassifier.classifyGesture(GENERIC, 0.5, 0).isFalse()).isFalse();
    }

    @Test
    public void testPass_mostlyUncovered() {
        touchDown();
        mClassifier.onProximityEvent(createSensorEvent(true, 1));
        mClassifier.onProximityEvent(createSensorEvent(false, 2));
        touchUp(20);
        assertThat(mClassifier.classifyGesture(GENERIC, 0.5, 0).isFalse()).isFalse();
    }

    @Test
    public void testPass_quickSettings() {
        touchDown();
        mClassifier.onProximityEvent(createSensorEvent(true, 1));
        mClassifier.onProximityEvent(createSensorEvent(false, 11));
        touchUp(10);
        assertThat(mClassifier.classifyGesture(QUICK_SETTINGS, 0.5, 0).isFalse()).isFalse();
    }

    @Test
    public void testPass_brightnessSlider() {
        touchDown();
        mClassifier.onProximityEvent(createSensorEvent(true, 1));
        mClassifier.onProximityEvent(createSensorEvent(false, 11));
        touchUp(10);
        assertThat(mClassifier.classifyGesture(BRIGHTNESS_SLIDER, 0.5, 0).isFalse())
                .isFalse();
    }

    @Test
    public void testFail_covered() {
        touchDown();
        mClassifier.onProximityEvent(createSensorEvent(true, 1));
        mClassifier.onProximityEvent(createSensorEvent(false, 11));
        touchUp(10);
        assertThat(mClassifier.classifyGesture(GENERIC, 0.5, 0).isFalse()).isTrue();
    }

    @Test
    public void testFail_mostlyCovered() {
        touchDown();
        mClassifier.onProximityEvent(createSensorEvent(true, 1));
        mClassifier.onProximityEvent(createSensorEvent(true, 95));
        mClassifier.onProximityEvent(createSensorEvent(true, 96));
        mClassifier.onProximityEvent(createSensorEvent(false, 100));
        touchUp(100);
        assertThat(mClassifier.classifyGesture(GENERIC, 0.5, 0).isFalse()).isTrue();
    }

    @Test
    public void testPass_coveredWithLongSwipe() {
        touchDown();
        mClassifier.onProximityEvent(createSensorEvent(true, 1));
        mClassifier.onProximityEvent(createSensorEvent(false, 11));
        touchUp(10);
        when(mDistanceClassifier.isLongSwipe()).thenReturn(mPassedResult);
        assertThat(mClassifier.classifyGesture(GENERIC, 0.5, 0).isFalse()).isFalse();
    }

    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 FalsingManager.ProximityEvent createSensorEvent(boolean covered, long timestampMs) {
        return new FalsingManager.ProximityEvent() {
            @Override
            public boolean getCovered() {
                return covered;
            }

            @Override
            public long getTimestampNs() {
                return timestampMs * NS_PER_MS;
            }
        };
    }
}