/*
 * Copyright (C) 2024 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.car.settings.privacy;

import static com.android.car.settings.enterprise.EnterpriseUtils.getAvailabilityStatusRestricted;
import static com.android.car.settings.enterprise.EnterpriseUtils.hasUserRestrictionByDpm;
import static com.android.car.settings.enterprise.EnterpriseUtils.onClickWhileDisabled;

import android.annotation.FlaggedApi;
import android.car.drivingstate.CarUxRestrictions;
import android.content.Context;
import android.hardware.SensorPrivacyManager;
import android.os.UserManager;

import com.android.car.settings.R;
import com.android.car.settings.common.FragmentController;
import com.android.car.ui.preference.CarUiSwitchPreference;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.camera.flags.Flags;

/**
 * Displays a toggle to turn off camera access for required apps.
 */
@FlaggedApi(Flags.FLAG_CAMERA_PRIVACY_ALLOWLIST)
public final class CameraRequiredAppsTogglePreferenceController
        extends CameraPrivacyBasePreferenceController<CarUiSwitchPreference> {
    private boolean mRequiredAppsToggleAvailable;

    public CameraRequiredAppsTogglePreferenceController(
            Context context,
            String preferenceKey,
            FragmentController fragmentController,
            CarUxRestrictions uxRestrictions) {
        this(context, preferenceKey, fragmentController, uxRestrictions,
                SensorPrivacyManager.getInstance(context));
    }

    @VisibleForTesting
    CameraRequiredAppsTogglePreferenceController(Context context, String preferenceKey,
            FragmentController fragmentController, CarUxRestrictions uxRestrictions,
            SensorPrivacyManager sensorPrivacyManager) {
        super(context, preferenceKey, fragmentController, uxRestrictions, sensorPrivacyManager);
        mRequiredAppsToggleAvailable = context.getResources()
                .getBoolean(R.bool.config_show_camera_required_apps_toggle);
    }

    @Override
    protected Class<CarUiSwitchPreference> getPreferenceType() {
        return CarUiSwitchPreference.class;
    }

    @Override
    protected int getDefaultAvailabilityStatus() {
        if (!mRequiredAppsToggleAvailable) {
            return CONDITIONALLY_UNAVAILABLE;
        } else {
            return getAvailabilityStatusRestricted(getContext(),
                    UserManager.DISALLOW_CAMERA_TOGGLE);
        }
    }

    @Override
    protected boolean handlePreferenceChanged(CarUiSwitchPreference preference,
            Object newValue) {
        boolean isChecked = (Boolean) newValue;
        int state = getSensorPrivacyManager().getSensorPrivacyState(
                SensorPrivacyManager.TOGGLE_TYPE_SOFTWARE,
                SensorPrivacyManager.Sensors.CAMERA);
        boolean isCameraMutedForRequiredApps = (state == SensorPrivacyManager.StateTypes.ENABLED);
        if (isChecked == isCameraMutedForRequiredApps) {
            int newState;
            if (isChecked) {
                newState = SensorPrivacyManager.StateTypes.ENABLED_EXCEPT_ALLOWLISTED_APPS;
            } else {
                newState = SensorPrivacyManager.StateTypes.ENABLED;
            }

            getSensorPrivacyManager().setSensorPrivacyStateForProfileGroup(
                    SensorPrivacyManager.Sources.SETTINGS,
                    SensorPrivacyManager.Sensors.CAMERA,
                    newState);
        }
        return true;
    }

    @Override
    protected void updateState(CarUiSwitchPreference preference) {
        int state = getSensorPrivacyManager().getSensorPrivacyState(
                SensorPrivacyManager.TOGGLE_TYPE_SOFTWARE,
                SensorPrivacyManager.Sensors.CAMERA);
        boolean isCameraMutedForRequiredApps = (state == SensorPrivacyManager.StateTypes.ENABLED);
        preference.setChecked(!isCameraMutedForRequiredApps);
        if (state == SensorPrivacyManager.StateTypes.DISABLED) {
            getPreference().setEnabled(false);
        } else {
            getPreference().setEnabled(true);
        }
        if (hasUserRestrictionByDpm(getContext(), UserManager.DISALLOW_CAMERA_TOGGLE)) {
            setClickableWhileDisabled(preference, /* clickable= */ true, p ->
                    onClickWhileDisabled(getContext(), getFragmentController(),
                            UserManager.DISALLOW_CAMERA_TOGGLE));
        }
    }
}