/*
 * 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 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 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.search.scroll;

import org.apache.lucene.util.SetOnce;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.search.ClearScrollRequest;
import org.elasticsearch.action.search.ClearScrollResponse;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.bytes.BytesArray;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.search.RestClearScrollAction;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.client.NoOpNodeClient;
import org.elasticsearch.test.rest.FakeRestChannel;
import org.elasticsearch.test.rest.FakeRestRequest;

import java.util.Collections;

import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.hasSize;

public class RestClearScrollActionTests extends ESTestCase {

    public void testParseClearScrollRequestWithInvalidJsonThrowsException() throws Exception {
        RestClearScrollAction action = new RestClearScrollAction();
        RestRequest request = new FakeRestRequest.Builder(xContentRegistry())
            .withContent(new BytesArray("{invalid_json}"), XContentType.JSON).build();
        Exception e = expectThrows(IllegalArgumentException.class, () -> action.prepareRequest(request, null));
        assertThat(e.getMessage(), equalTo("Failed to parse request body"));
    }

    public void testBodyParamsOverrideQueryStringParams() throws Exception {
        SetOnce<Boolean> scrollCalled = new SetOnce<>();
        try (NodeClient nodeClient = new NoOpNodeClient(this.getTestName()) {
            @Override
            public void clearScroll(ClearScrollRequest request, ActionListener<ClearScrollResponse> listener) {
                scrollCalled.set(true);
                assertThat(request.getScrollIds(), hasSize(1));
                assertThat(request.getScrollIds().get(0), equalTo("BODY"));
            }
        }) {
            RestClearScrollAction action = new RestClearScrollAction();
            RestRequest request = new FakeRestRequest.Builder(xContentRegistry())
                .withParams(Collections.singletonMap("scroll_id", "QUERY_STRING"))
                .withContent(new BytesArray("{\"scroll_id\": [\"BODY\"]}"), XContentType.JSON).build();
            FakeRestChannel channel = new FakeRestChannel(request, false, 0);
            action.handleRequest(request, channel, nodeClient);

            assertThat(scrollCalled.get(), equalTo(true));
        }
    }
}
