/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.action.admin.indices.settings.get;

import org.elasticsearch.common.settings.IndexScopedSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.RandomCreateIndexGenerator;
import org.elasticsearch.test.AbstractChunkedSerializingTestCase;
import org.elasticsearch.test.ESTestCase;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;

public class GetSettingsResponseTests extends ESTestCase {

    protected GetSettingsResponse createTestInstance() {
        HashMap<String, Settings> indexToSettings = new HashMap<>();
        HashMap<String, Settings> indexToDefaultSettings = new HashMap<>();

        IndexScopedSettings indexScopedSettings = IndexScopedSettings.DEFAULT_SCOPED_SETTINGS;

        Set<String> indexNames = new HashSet<String>();
        int numIndices = randomIntBetween(1, 5);
        for (int x = 0; x < numIndices; x++) {
            String indexName = randomAlphaOfLength(5);
            indexNames.add(indexName);
        }

        for (String indexName : indexNames) {
            Settings.Builder builder = Settings.builder();
            builder.put(RandomCreateIndexGenerator.randomIndexSettings());
            /*
            We must ensure that *something* is in the settings response as we optimize away empty settings
            blocks in x content responses
             */
            builder.put("index.refresh_interval", "1s");
            indexToSettings.put(indexName, builder.build());
        }

        if (randomBoolean()) {
            for (String indexName : indexToSettings.keySet()) {
                Settings defaultSettings = indexScopedSettings.diff(indexToSettings.get(indexName), Settings.EMPTY);
                indexToDefaultSettings.put(indexName, defaultSettings);
            }
        }

        return new GetSettingsResponse(indexToSettings, indexToDefaultSettings);
    }

    public void testChunking() {
        AbstractChunkedSerializingTestCase.assertChunkCount(createTestInstance(), response -> 2 + response.getIndexToSettings().size());
    }

}