/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.rest;

import org.apache.http.entity.StringEntity;
import org.elasticsearch.client.Response;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.test.rest.ESRestTestCase;
import org.hamcrest.Matcher;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;

import static java.util.Collections.emptyMap;
import static java.util.Collections.singletonMap;
import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.Matchers.greaterThan;

/**
 * Tests that HTTP HEAD requests don't respond with a body.
 */
public class HeadBodyIsEmptyIntegTestCase extends ESRestTestCase {

    public void testHeadRoot() throws IOException {
        headTestCase("/", emptyMap(), greaterThan(0));
        headTestCase("/", singletonMap("pretty", ""), greaterThan(0));
        headTestCase("/", singletonMap("pretty", "true"), greaterThan(0));
    }

    private void createTestDoc() throws IOException {
        client().performRequest("PUT", "test/test/1", emptyMap(), new StringEntity("{\"test\": \"test\"}"));
    }

    public void testDocumentExists() throws IOException {
        createTestDoc();
        headTestCase("test/test/1", emptyMap(), equalTo(0));
        headTestCase("test/test/1", singletonMap("pretty", "true"), equalTo(0));
    }

    public void testIndexExists() throws IOException {
        createTestDoc();
        headTestCase("test", emptyMap(), greaterThan(0));
        headTestCase("test", singletonMap("pretty", "true"), greaterThan(0));
    }

    public void testTypeExists() throws IOException {
        createTestDoc();
        headTestCase("test/test", emptyMap(), equalTo(0));
        headTestCase("test/test", singletonMap("pretty", "true"), equalTo(0));
    }

    public void testAliasExists() throws IOException {
        createTestDoc();
        try (XContentBuilder builder = jsonBuilder()) {
            builder.startObject();
            {
                builder.startArray("actions");
                {
                    builder.startObject();
                    {
                        builder.startObject("add");
                        {
                            builder.field("index", "test");
                            builder.field("alias", "test_alias");
                        }
                        builder.endObject();
                    }
                    builder.endObject();
                }
                builder.endArray();
            }
            builder.endObject();

            client().performRequest("POST", "_aliases", emptyMap(), new StringEntity(builder.string()));
            headTestCase("/_alias/test_alias", emptyMap(), greaterThan(0));
            headTestCase("/test/_alias/test_alias", emptyMap(), greaterThan(0));
        }
    }

    public void testTemplateExists() throws IOException {
        try (XContentBuilder builder = jsonBuilder()) {
            builder.startObject();
            {
                builder.array("index_patterns", "*");
                builder.startObject("settings");
                {
                    builder.field("number_of_replicas", 0);
                }
                builder.endObject();
            }
            builder.endObject();

            client().performRequest("PUT", "/_template/template", emptyMap(), new StringEntity(builder.string()));
            headTestCase("/_template/template", emptyMap(), greaterThan(0));
        }
    }

    private void headTestCase(String url, Map<String, String> params, Matcher<Integer> matcher) throws IOException {
        Response response = client().performRequest("HEAD", url, params);
        assertEquals(200, response.getStatusLine().getStatusCode());
        assertThat(Integer.valueOf(response.getHeader("Content-Length")), matcher);
        assertNull("HEAD requests shouldn't have a response body but " + url + " did", response.getEntity());
    }

}
@@ -3886,22 +3886,16 @@
 ay(%22
-index_patterns
+template
 %22, %22

Fix template HEAD test