/*
 * Copyright (C) 2020 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;

import static com.android.settings.core.PreferenceXmlParserUtils.METADATA_KEY;
import static com.android.settings.core.PreferenceXmlParserUtils.MetadataFlag.FLAG_INCLUDE_PREF_SCREEN;
import static com.android.settings.core.PreferenceXmlParserUtils.MetadataFlag.FLAG_NEED_KEY;

import android.annotation.XmlRes;
import android.content.Context;
import android.os.Bundle;
import android.provider.SearchIndexableResource;

import com.android.settings.core.PreferenceXmlParserUtils;
import com.android.settings.search.BaseSearchIndexProvider;

import java.util.ArrayList;
import java.util.List;

/**
 * Convenience methods and constants for testing.
 */
public class TestUtils {
    public static final long KILOBYTE = 1024L; // TODO: Change to 1000 in O Robolectric.
    public static final long MEGABYTE = KILOBYTE * KILOBYTE;
    public static final long GIGABYTE = KILOBYTE * MEGABYTE;

    public static List<String> getAllXmlKeys(
            Context context, BaseSearchIndexProvider indexProvider)
            throws Exception {
        final List<SearchIndexableResource> resources = indexProvider.getXmlResourcesToIndex(
                context, true /* not used*/);
        if (resources == null || resources.isEmpty()) {
            return new ArrayList<>();
        }
        final List<String> keys = new ArrayList<>();
        for (SearchIndexableResource res : resources) {
            keys.addAll(getKeysFromXml(res.xmlResId, context));
        }
        return keys;
    }

    private static List<String> getKeysFromXml(@XmlRes int xmlResId, Context context)
            throws Exception {
        final List<String> keys = new ArrayList<>();
        final List<Bundle> metadata = PreferenceXmlParserUtils.extractMetadata(context, xmlResId,
                FLAG_NEED_KEY | FLAG_INCLUDE_PREF_SCREEN);
        for (Bundle bundle : metadata) {
            keys.add(bundle.getString(METADATA_KEY));
        }
        return keys;
    }
}
