/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License;
 * you may not use this file except in compliance with the Elastic License.
 */
package org.elasticsearch.smoketest;

import com.carrotsearch.randomizedtesting.annotations.Name;
import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
import org.elasticsearch.test.rest.yaml.ClientYamlTestCandidate;
import org.elasticsearch.test.rest.yaml.ClientYamlTestResponse;
import org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase;
import org.elasticsearch.xpack.core.watcher.support.WatcherIndexTemplateRegistryField;
import org.junit.After;
import org.junit.Before;

import static java.util.Collections.emptyList;
import static java.util.Collections.emptyMap;
import static java.util.Collections.singletonMap;
import static org.hamcrest.Matchers.is;

/** Runs rest tests against external cluster */
public class WatcherRestIT extends ESClientYamlSuiteTestCase {

    public WatcherRestIT(@Name("yaml") ClientYamlTestCandidate testCandidate) {
        super(testCandidate);
    }

    @ParametersFactory
    public static Iterable<Object[]> parameters() throws Exception {
        return ESClientYamlSuiteTestCase.createParameters();
    }

    @Before
    public void startWatcher() throws Exception {
        assertBusy(() -> {
            ClientYamlTestResponse response =
                getAdminExecutionContext().callApi("xpack.watcher.stats", emptyMap(), emptyList(), emptyMap());
            String state = (String) response.evaluate("stats.0.watcher_state");

            switch (state) {
                case "stopped":
                    ClientYamlTestResponse startResponse =
                        getAdminExecutionContext().callApi("xpack.watcher.start", emptyMap(), emptyList(), emptyMap());
                    boolean isAcknowledged = (boolean) startResponse.evaluate("acknowledged");
                    assertThat(isAcknowledged, is(true));
                    throw new AssertionError("waiting until stopped state reached started state");
                case "stopping":
                    throw new AssertionError("waiting until stopping state reached stopped state to start again");
                case "starting":
                    throw new AssertionError("waiting until starting state reached started state");
                case "started":
                    // all good here, we are done
                    break;
                default:
                    throw new AssertionError("unknown state[" + state + "]");
            }
        });

        assertBusy(() -> {
            for (String template : WatcherIndexTemplateRegistryField.TEMPLATE_NAMES) {
                ClientYamlTestResponse templateExistsResponse = getAdminExecutionContext().callApi("indices.exists_template",
                    singletonMap("name", template), emptyList(), emptyMap());
                assertThat(templateExistsResponse.getStatusCode(), is(200));
            }
        });
    }

    @After
    public void stopWatcher() throws Exception {
        assertBusy(() -> {
            ClientYamlTestResponse response =
                getAdminExecutionContext().callApi("xpack.watcher.stats", emptyMap(), emptyList(), emptyMap());
            String state = (String) response.evaluate("stats.0.watcher_state");

            switch (state) {
                case "stopped":
                    // all good here, we are done
                    break;
                case "stopping":
                    throw new AssertionError("waiting until stopping state reached stopped state");
                case "starting":
                    throw new AssertionError("waiting until starting state reached started state to stop");
                case "started":
                    ClientYamlTestResponse stopResponse =
                        getAdminExecutionContext().callApi("xpack.watcher.stop", emptyMap(), emptyList(), emptyMap());
                    boolean isAcknowledged = (boolean) stopResponse.evaluate("acknowledged");
                    assertThat(isAcknowledged, is(true));
                    throw new AssertionError("waiting until started state reached stopped state");
                default:
                    throw new AssertionError("unknown state[" + state + "]");
            }
        });
    }
}
