/*
 * 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.car.settings.applications.managedomainurls;

import android.app.Application;
import android.car.drivingstate.CarUxRestrictions;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.UserHandle;
import android.util.IconDrawableFactory;

import androidx.annotation.VisibleForTesting;
import androidx.lifecycle.Lifecycle;
import androidx.preference.Preference;
import androidx.preference.PreferenceGroup;

import com.android.car.settings.common.FragmentController;
import com.android.car.settings.common.PreferenceController;
import com.android.car.ui.preference.CarUiPreference;
import com.android.settingslib.applications.ApplicationsState;

import java.util.ArrayList;

/** Business logic to populate the list of apps that deal with domain urls. */
public class DomainAppPreferenceController extends PreferenceController<PreferenceGroup> {

    private final ApplicationsState mApplicationsState;
    private final PackageManager mPm;

    @VisibleForTesting
    final ApplicationsState.Callbacks mApplicationStateCallbacks =
            new ApplicationsState.Callbacks() {
                @Override
                public void onRunningStateChanged(boolean running) {
                }

                @Override
                public void onPackageListChanged() {
                }

                @Override
                public void onRebuildComplete(ArrayList<ApplicationsState.AppEntry> apps) {
                    rebuildAppList(apps);
                }

                @Override
                public void onPackageIconChanged() {
                }

                @Override
                public void onPackageSizeChanged(String packageName) {
                }

                @Override
                public void onAllSizesComputed() {
                }

                @Override
                public void onLauncherInfoChanged() {
                }

                @Override
                public void onLoadEntriesCompleted() {
                    mSession.rebuild(ApplicationsState.FILTER_WITH_DOMAIN_URLS,
                            ApplicationsState.ALPHA_COMPARATOR);
                }
            };

    private ApplicationsState.Session mSession;

    public DomainAppPreferenceController(Context context, String preferenceKey,
            FragmentController fragmentController, CarUxRestrictions uxRestrictions) {
        this(context, preferenceKey, fragmentController, uxRestrictions,
                ApplicationsState.getInstance((Application) context.getApplicationContext()),
                context.getPackageManager());
    }

    @VisibleForTesting
    DomainAppPreferenceController(Context context, String preferenceKey,
            FragmentController fragmentController, CarUxRestrictions uxRestrictions,
            ApplicationsState applicationsState, PackageManager packageManager) {
        super(context, preferenceKey, fragmentController, uxRestrictions);
        mApplicationsState = applicationsState;
        mPm = packageManager;
    }

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

    @Override
    protected void checkInitialized() {
        if (mSession == null) {
            throw new IllegalStateException("session should be non null by this point");
        }
    }

    /** Sets the lifecycle to create a new session. */
    public void setLifecycle(Lifecycle lifecycle) {
        mSession = mApplicationsState.newSession(mApplicationStateCallbacks, lifecycle);
    }

    @Override
    protected void onStartInternal() {
        // Resume the session earlier than the lifecycle so that cached information is updated
        // even if settings is not resumed (for example in multi-display).
        mSession.onResume();
    }

    @Override
    protected void onStopInternal() {
        // Since we resume early in onStart, make sure we clean up even if we don't receive onPause.
        mSession.onPause();
    }

    private void rebuildAppList(ArrayList<ApplicationsState.AppEntry> apps) {
        PreferenceGroup preferenceGroup = getPreference();
        preferenceGroup.removeAll();
        for (int i = 0; i < apps.size(); i++) {
            ApplicationsState.AppEntry entry = apps.get(i);
            preferenceGroup.addPreference(createPreference(entry));
        }
    }

    private Preference createPreference(ApplicationsState.AppEntry entry) {
        String key = entry.info.packageName + "|" + entry.info.uid;
        IconDrawableFactory iconDrawableFactory = IconDrawableFactory.newInstance(getContext());
        CarUiPreference preference = new CarUiPreference(getContext());
        preference.setKey(key);
        preference.setTitle(entry.label);
        preference.setSummary(
                DomainUrlsUtils.getDomainsSummary(getContext(), entry.info.packageName,
                        UserHandle.myUserId(),
                        DomainUrlsUtils.getHandledDomains(mPm, entry.info.packageName)));
        preference.setIcon(iconDrawableFactory.getBadgedIcon(entry.info));
        preference.setOnPreferenceClickListener(pref -> {
            getFragmentController().launchFragment(
                    ApplicationLaunchSettingsFragment.newInstance(entry.info.packageName));
            return true;
        });
        return preference;
    }
}