/*
 * Copyright 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 androidx.appcompat.app;

import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ServiceInfo;
import android.os.Build;
import android.os.IBinder;

import androidx.annotation.DoNotInline;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.core.os.LocaleListCompat;

/**
 * A placeholder service to avoid adding application-level metadata. The service
 * is only used to expose metadata defined in the library's manifest. It is
 * never invoked.
 *
 * <p>This metadata boolean collected from the key "autoStoreLocales" is used as an opt-in from
 * the developers to automatically store locales provided by them through the API
 * {@link AppCompatDelegate#setApplicationLocales(LocaleListCompat)}.</p>
 */
public final class AppLocalesMetadataHolderService extends Service {
    public AppLocalesMetadataHolderService() {}

    @NonNull
    @Override
    public IBinder onBind(@SuppressWarnings("InvalidNullabilityOverride") @NonNull Intent intent) {
        throw new UnsupportedOperationException();
    }

    /**
     * Returns the {@link ServiceInfo} for the declared {@link AppLocalesMetadataHolderService}.
     *
     * <p>This serviceInfo contains the attribute "autoStoreLocales", its value being a boolean
     * that informs us if the developer wants us to handle the storage of locales or not.</p>
     */
    @NonNull
    @SuppressWarnings("deprecation") // GET_DISABLED_COMPONENTS, getServiceInfo
    public static ServiceInfo getServiceInfo(@NonNull Context context) throws
            PackageManager.NameNotFoundException {
        int flags = PackageManager.GET_META_DATA;
        // The service is marked as disabled so we need to include the following flags.
        if (Build.VERSION.SDK_INT >= 24) {
            flags |= Api24Impl.getDisabledComponentFlag();
        } else {
            flags |= PackageManager.GET_DISABLED_COMPONENTS;
        }

        return context.getPackageManager().getServiceInfo(
                new ComponentName(context, AppLocalesMetadataHolderService.class), flags);
    }

    @RequiresApi(24)
    private static class Api24Impl {
        @DoNotInline
        static int getDisabledComponentFlag() {
            return PackageManager.MATCH_DISABLED_COMPONENTS;
        }
    }
}