/*
 * 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.settings.biometrics.face;

import static com.android.settings.Utils.SETTINGS_PACKAGE_NAME;

import android.app.admin.DevicePolicyManager;
import android.app.admin.PolicyEnforcementInfo;
import android.content.Context;
import android.content.Intent;
import android.view.View;
import android.widget.Button;

import androidx.annotation.NonNull;
import androidx.preference.Preference;

import com.android.settings.R;
import com.android.settings.core.BasePreferenceController;
import com.android.settings.flags.Flags;
import com.android.settings.password.ChooseLockSettingsHelper;
import com.android.settingslib.RestrictedLockUtilsInternal;
import com.android.settingslib.widget.LayoutPreference;

import com.google.android.setupdesign.util.ButtonStyler;
import com.google.android.setupdesign.util.PartnerStyleHelper;

/**
 * Preference controller that allows a user to enroll their face.
 */
public class FaceSettingsEnrollButtonPreferenceController extends BasePreferenceController
        implements View.OnClickListener, Preference.OnPreferenceClickListener {

    private static final String TAG = "FaceSettings/Remove";
    static final String KEY = "security_settings_face_enroll_faces_container";
    static final String KEY_1 = "security_settings_face_enroll";

    private final Context mContext;

    private int mUserId;
    private byte[] mToken;
    private Button mButton;
    private boolean mIsClicked;
    private Listener mListener;

    public FaceSettingsEnrollButtonPreferenceController(Context context) {
        this(context, Flags.biometricsOnboardingEducation() ? KEY_1 : KEY);
    }

    public FaceSettingsEnrollButtonPreferenceController(Context context, String preferenceKey) {
        super(context, preferenceKey);
        mContext = context;
    }

    @Override
    public void updateState(@NonNull Preference preference) {
        super.updateState(preference);
        final boolean isAdminBlockingAuth = isAdminRestricted();

        if (Flags.biometricsOnboardingEducation()) {
            preference.setEnabled(!isAdminBlockingAuth);
        } else {
            mButton = ((LayoutPreference) preference).findViewById(
                    R.id.security_settings_face_settings_enroll_button);

            if (PartnerStyleHelper.shouldApplyPartnerResource(mButton)) {
                ButtonStyler.applyPartnerCustomizationPrimaryButtonStyle(mContext, mButton);
            }

            mButton.setOnClickListener(this);
            mButton.setEnabled(!isAdminBlockingAuth);
        }
    }

    @Override
    public void onClick(View v) {
        startEnrolling();
    }

    @Override
    public boolean onPreferenceClick(@NonNull Preference preference) {
        startEnrolling();
        return true;
    }

    private void startEnrolling() {
        mIsClicked = true;
        final Intent intent = new Intent();
        intent.setClassName(SETTINGS_PACKAGE_NAME, FaceEnroll.class.getName());
        intent.putExtra(Intent.EXTRA_USER_ID, mUserId);
        intent.putExtra(ChooseLockSettingsHelper.EXTRA_KEY_CHALLENGE_TOKEN, mToken);
        if (mListener != null) {
            mListener.onStartEnrolling(intent);
        } else {
            mContext.startActivity(intent);
        }
    }

    private boolean isAdminRestricted() {
        if (android.app.admin.flags.Flags.policyTransparencyRefactorEnabled()
                && android.app.admin.flags.Flags.setKeyguardDisabledFeaturesCoexistence()) {
            final PolicyEnforcementInfo info =
                    RestrictedLockUtilsInternal.getEnforcingAdminsForKeyguardFeatures(mContext,
                            DevicePolicyManager.KEYGUARD_DISABLE_FACE, mUserId);
            return info != null && info.getMostImportantEnforcingAdmin() != null;
        }
        return RestrictedLockUtilsInternal.checkIfKeyguardFeaturesDisabled(
                mContext, DevicePolicyManager.KEYGUARD_DISABLE_FACE, mUserId) != null;
    }

    @Override
    public int getAvailabilityStatus() {
        return AVAILABLE;
    }

    public void setUserId(int userId) {
        mUserId = userId;
    }

    public void setToken(byte[] token) {
        mToken = token;
    }

    // Return the click state, then clear its state.
    public boolean isClicked() {
        final boolean wasClicked = mIsClicked;
        mIsClicked = false;
        return wasClicked;
    }

    public void setListener(Listener listener) {
        mListener = listener;
    }

    /**
     * Interface for registering callbacks related to the face enroll preference button.
     */
    public interface Listener {
        /**
         * Called when the user has indicated an intent to begin enrolling a new face.
         * @param intent The Intent that should be used to launch face enrollment.
         */
        void onStartEnrolling(Intent intent);
    }
}