/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 *
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.ad.transport;

import java.io.IOException;
import java.time.Instant;
import java.util.Collection;

import org.junit.Before;
import org.opensearch.Version;
import org.opensearch.action.ActionRequestValidationException;
import org.opensearch.ad.constant.ADCommonMessages;
import org.opensearch.ad.model.ADTaskAction;
import org.opensearch.common.io.stream.BytesStreamOutput;
import org.opensearch.core.common.io.stream.NamedWriteableAwareStreamInput;
import org.opensearch.core.common.io.stream.NamedWriteableRegistry;
import org.opensearch.plugins.Plugin;
import org.opensearch.test.InternalSettingsPlugin;
import org.opensearch.test.OpenSearchSingleNodeTestCase;
import org.opensearch.timeseries.TestHelpers;
import org.opensearch.timeseries.TimeSeriesAnalyticsPlugin;

import com.google.common.collect.ImmutableMap;

public class ForwardADTaskTests extends OpenSearchSingleNodeTestCase {
    private Version testVersion;

    @Before
    @Override
    public void setUp() throws Exception {
        super.setUp();
        testVersion = Version.fromString("1.1.0");
    }

    @Override
    protected Collection<Class<? extends Plugin>> getPlugins() {
        return pluginList(InternalSettingsPlugin.class, TimeSeriesAnalyticsPlugin.class);
    }

    @Override
    protected NamedWriteableRegistry writableRegistry() {
        return getInstanceFromNode(NamedWriteableRegistry.class);
    }

    public void testForwardADTaskRequest() throws IOException {
        ForwardADTaskRequest request = new ForwardADTaskRequest(
            TestHelpers.randomAnomalyDetector(ImmutableMap.of(), Instant.now()),
            TestHelpers.randomDetectionDateRange(),
            TestHelpers.randomUser(),
            ADTaskAction.START,
            randomInt(),
            testVersion
        );
        testForwardADTaskRequest(request);
    }

    public void testForwardADTaskRequestWithoutUser() throws IOException {
        ForwardADTaskRequest request = new ForwardADTaskRequest(
            TestHelpers.randomAnomalyDetector(ImmutableMap.of(), Instant.now()),
            TestHelpers.randomDetectionDateRange(),
            null,
            ADTaskAction.START,
            randomInt(),
            testVersion
        );
        testForwardADTaskRequest(request);
    }

    public void testInvalidForwardADTaskRequest() {
        ForwardADTaskRequest request = new ForwardADTaskRequest(
            null,
            TestHelpers.randomDetectionDateRange(),
            TestHelpers.randomUser(),
            ADTaskAction.START,
            randomInt(),
            testVersion
        );

        ActionRequestValidationException exception = request.validate();
        assertTrue(exception.getMessage().contains(ADCommonMessages.DETECTOR_MISSING));
    }

    private void testForwardADTaskRequest(ForwardADTaskRequest request) throws IOException {
        BytesStreamOutput output = new BytesStreamOutput();
        request.writeTo(output);
        NamedWriteableAwareStreamInput input = new NamedWriteableAwareStreamInput(output.bytes().streamInput(), writableRegistry());
        ForwardADTaskRequest parsedRequest = new ForwardADTaskRequest(input);
        if (request.getUser() != null) {
            assertTrue(request.getUser().equals(parsedRequest.getUser()));
        } else {
            assertNull(parsedRequest.getUser());
        }
    }
}