/*
 * Copyright (C) 2018 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.display;

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

import android.content.Context;
import android.hardware.display.ColorDisplayManager;
import android.provider.Settings.Secure;
import com.android.settings.testutils.shadow.SettingsShadowResources;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.RuntimeEnvironment;
import org.robolectric.annotation.Config;

@RunWith(RobolectricTestRunner.class)
@Config(shadows = SettingsShadowResources.class)
public class NightDisplayIntensityPreferenceControllerTest {

  private Context mContext;
  private NightDisplayIntensityPreferenceController mPreferenceController;

  @Before
  public void setUp() {
    mContext = RuntimeEnvironment.application;
    mPreferenceController = new NightDisplayIntensityPreferenceController(mContext,
        "night_display_temperature");
  }

  @After
  public void tearDown() {
    SettingsShadowResources.reset();
  }

  @Test
  public void isAvailable_configuredAvailable_isActivated_available() {
    SettingsShadowResources.overrideResource(
        com.android.internal.R.bool.config_nightDisplayAvailable, true);
    Secure.putInt(mContext.getContentResolver(), Secure.NIGHT_DISPLAY_ACTIVATED, 1);
    assertThat(mPreferenceController.isAvailable()).isTrue();
  }

  @Test
  public void isAvailable_configuredAvailable_isNotActivated_available() {
    SettingsShadowResources.overrideResource(
        com.android.internal.R.bool.config_nightDisplayAvailable, true);
    Secure.putInt(mContext.getContentResolver(), Secure.NIGHT_DISPLAY_ACTIVATED, 0);
    assertThat(mPreferenceController.isAvailable()).isTrue();
  }

  @Test
  public void isAvailable_configuredUnavailable_unavailable() {
    SettingsShadowResources.overrideResource(
        com.android.internal.R.bool.config_nightDisplayAvailable, false);
    assertThat(mPreferenceController.isAvailable()).isFalse();
  }

  @Test
  public void onPreferenceChange_changesTemperature() {
    SettingsShadowResources.overrideResource(
        com.android.internal.R.integer.config_nightDisplayColorTemperatureMin, 2950);
    SettingsShadowResources.overrideResource(
        com.android.internal.R.integer.config_nightDisplayColorTemperatureMax, 3050);
    // A slider-adjusted "20" here would be 1/5 from the left / least-intense, i.e. 3030.
    mPreferenceController.onPreferenceChange(null, 20);

    assertThat(
        mContext.getSystemService(ColorDisplayManager.class).getNightDisplayColorTemperature())
        .isEqualTo(3030);
  }

  @Test
  public void rangeOfSlider_staysWithinValidRange() {
    SettingsShadowResources.overrideResource(
            com.android.internal.R.integer.config_nightDisplayColorTemperatureMin, 2950);
    SettingsShadowResources.overrideResource(
            com.android.internal.R.integer.config_nightDisplayColorTemperatureMax, 3050);

    assertThat(mPreferenceController.getMax() - mPreferenceController.getMin())
            .isGreaterThan(0);
  }

  @Test
  public void getMin_alwaysReturnsZero() {
    assertThat(mPreferenceController.getMin()).isEqualTo(0);
  }

  @Test
  public void isSliceableCorrectKey_returnsTrue() {
    assertThat(mPreferenceController.isSliceable()).isTrue();
  }

  @Test
  public void isSliceableIncorrectKey_returnsFalse() {
    final NightDisplayIntensityPreferenceController controller =
        new NightDisplayIntensityPreferenceController(mContext, "bad_key");
    assertThat(controller.isSliceable()).isFalse();
  }
}
