/*
 * Copyright (C) 2022 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.biometrics.face;

import android.app.admin.DevicePolicyManager;
import android.app.admin.EnforcingAdmin;
import android.app.admin.PolicyEnforcementInfo;
import android.content.Context;
import android.hardware.biometrics.BiometricAuthenticator;
import android.hardware.face.FaceManager;
import android.os.UserManager;

import androidx.annotation.Nullable;

import com.android.settings.R;
import com.android.settings.Settings;
import com.android.settings.Utils;
import com.android.settings.biometrics.ParentalControlsUtils;
import com.android.settings.flags.Flags;
import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
import com.android.settingslib.RestrictedLockUtilsInternal;

/** Utilities for face details shared between Security Settings and Safety Center. */
public class FaceStatusUtils {

    private final int mUserId;
    private final Context mContext;
    private final FaceManager mFaceManager;

    public FaceStatusUtils(Context context, FaceManager faceManager, int userId) {
        mContext = context;
        mFaceManager = faceManager;
        mUserId = userId;
    }

    /** Returns whether the face settings entity should be shown. */
    public boolean isAvailable() {
        return !Utils.isMultipleBiometricsSupported(mContext) && Utils.hasFaceHardware(mContext);
    }

    /**
     * Returns the {@link EnforcedAdmin} if parental consent is required to change face settings.
     *
     * @return null if face settings does not require a parental consent.
     */
    public EnforcedAdmin getDisablingAdmin() {
        return ParentalControlsUtils.parentConsentRequired(
                mContext, BiometricAuthenticator.TYPE_FACE);
    }

    /**
     * Returns the {@link EnforcingAdmin} if parental consent is required to change face settings.
     *
     * @return null if face settings does not require a parental consent.
     */
    @Nullable
    public EnforcingAdmin getEnforcingAdmin() {
        return ParentalControlsUtils.getParentalSupervisionAdmin(
                mContext, BiometricAuthenticator.TYPE_FACE);
    }

    /** Returns the title of face settings entity. */
    public String getTitle() {
        UserManager userManager = mContext.getSystemService(UserManager.class);
        if (userManager != null && userManager.isProfile()) {
            return mContext.getString(
                    Utils.isPrivateProfile(mUserId, mContext)
                            ? getPrivateSpaceTitle()
                            : getWorkProfileTitle());
        } else {
            return mContext.getString(getRegularTitle());
        }
    }

    private int getPrivateSpaceTitle() {
        if (Flags.biometricsOnboardingEducation()) {
            return R.string.private_space_face_unlock_title_new;
        }
        return R.string.private_space_face_unlock_title;
    }

    private int getWorkProfileTitle() {
        if (Flags.biometricsOnboardingEducation()) {
            return R.string.security_settings_face_profile_preference_title_new;
        }
        return R.string.security_settings_face_profile_preference_title;
    }

    private int getRegularTitle() {
        if (Flags.biometricsOnboardingEducation()) {
            return R.string.security_settings_face_preference_title_new;
        }
        return R.string.security_settings_face_preference_title;
    }

    /** Returns the summary of face settings entity. */
    public String getSummary() {
        if (shouldShowDisabledByAdminStr()) {
            return mContext.getString(
                    com.android.settingslib.widget.restricted.R.string.disabled_by_admin);
        } else {
            int summaryNoneResId = Flags.biometricsOnboardingEducation()
                    ? R.string.security_settings_face_preference_summary_none_new
                    : R.string.security_settings_face_preference_summary_none;
            return mContext.getResources()
                    .getString(
                            hasEnrolled()
                                    ? R.string.security_settings_face_preference_summary
                                    : summaryNoneResId);
        }
    }

    /** Returns the class name of the Settings page corresponding to face settings. */
    public String getSettingsClassName() {
        return Settings.FaceSettingsInternalActivity.class.getName();
    }

    /** Returns whether at least one face template has been enrolled. */
    public boolean hasEnrolled() {
        return mFaceManager.hasEnrolledTemplates(mUserId);
    }

    /** Indicates if the face feature is enabled or disabled by the Device Admin. */
    private boolean shouldShowDisabledByAdminStr() {
        if (android.app.admin.flags.Flags.policyTransparencyRefactorEnabled()
                && android.app.admin.flags.Flags.setKeyguardDisabledFeaturesCoexistence()) {
            final PolicyEnforcementInfo policyInfo =
                    RestrictedLockUtilsInternal.getEnforcingAdminsForKeyguardFeatures(mContext,
                            DevicePolicyManager.KEYGUARD_DISABLE_FACE, mUserId);
            return policyInfo != null && policyInfo.getMostImportantEnforcingAdmin() != null;
        }
        return RestrictedLockUtilsInternal.checkIfKeyguardFeaturesDisabled(mContext,
                DevicePolicyManager.KEYGUARD_DISABLE_FACE, mUserId) != null;
    }
}