/*
 * 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.gateway;

import org.elasticsearch.client.internal.Client;
import org.elasticsearch.cluster.block.ClusterBlock;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.core.TimeValue;
import org.elasticsearch.test.ESIntegTestCase;
import org.elasticsearch.test.ESIntegTestCase.ClusterScope;
import org.elasticsearch.test.ESIntegTestCase.Scope;

import java.util.Set;

import static org.elasticsearch.gateway.GatewayService.RECOVER_AFTER_DATA_NODES_SETTING;
import static org.elasticsearch.test.NodeRoles.dataOnlyNode;
import static org.elasticsearch.test.NodeRoles.masterOnlyNode;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.hasItem;

@ClusterScope(scope = Scope.TEST, numDataNodes = 0, autoManageMasterNodes = false)
public class RecoverAfterNodesIT extends ESIntegTestCase {
    private static final TimeValue BLOCK_WAIT_TIMEOUT = TimeValue.timeValueSeconds(10);

    public Set<ClusterBlock> waitForNoBlocksOnNode(TimeValue timeout, Client nodeClient) {
        long start = System.currentTimeMillis();
        Set<ClusterBlock> blocks;
        do {
            blocks = nodeClient.admin()
                .cluster()
                .prepareState(TEST_REQUEST_TIMEOUT)
                .setLocal(true)
                .get()
                .getState()
                .blocks()
                .global(ClusterBlockLevel.METADATA_WRITE);
        } while (blocks.isEmpty() == false && (System.currentTimeMillis() - start) < timeout.millis());
        return blocks;
    }

    public Client startNode(Settings.Builder settings) {
        String name = internalCluster().startNode(Settings.builder().put(settings.build()));
        return internalCluster().client(name);
    }

    public void testRecoverAfterDataNodes() {
        internalCluster().setBootstrapMasterNodeIndex(0);
        logger.info("--> start master_node (1)");
        Client master1 = startNode(Settings.builder().put(RECOVER_AFTER_DATA_NODES_SETTING.getKey(), 2).put(masterOnlyNode()));
        assertThat(
            master1.admin()
                .cluster()
                .prepareState(TEST_REQUEST_TIMEOUT)
                .setLocal(true)
                .get()
                .getState()
                .blocks()
                .global(ClusterBlockLevel.METADATA_WRITE),
            hasItem(GatewayService.STATE_NOT_RECOVERED_BLOCK)
        );

        logger.info("--> start data_node (1)");
        Client data1 = startNode(Settings.builder().put(RECOVER_AFTER_DATA_NODES_SETTING.getKey(), 2).put(dataOnlyNode()));
        assertThat(
            master1.admin()
                .cluster()
                .prepareState(TEST_REQUEST_TIMEOUT)
                .setLocal(true)
                .get()
                .getState()
                .blocks()
                .global(ClusterBlockLevel.METADATA_WRITE),
            hasItem(GatewayService.STATE_NOT_RECOVERED_BLOCK)
        );
        assertThat(
            data1.admin()
                .cluster()
                .prepareState(TEST_REQUEST_TIMEOUT)
                .setLocal(true)
                .get()
                .getState()
                .blocks()
                .global(ClusterBlockLevel.METADATA_WRITE),
            hasItem(GatewayService.STATE_NOT_RECOVERED_BLOCK)
        );

        logger.info("--> start master_node (2)");
        Client master2 = startNode(Settings.builder().put(RECOVER_AFTER_DATA_NODES_SETTING.getKey(), 2).put(masterOnlyNode()));
        assertThat(
            master2.admin()
                .cluster()
                .prepareState(TEST_REQUEST_TIMEOUT)
                .setLocal(true)
                .get()
                .getState()
                .blocks()
                .global(ClusterBlockLevel.METADATA_WRITE),
            hasItem(GatewayService.STATE_NOT_RECOVERED_BLOCK)
        );
        assertThat(
            data1.admin()
                .cluster()
                .prepareState(TEST_REQUEST_TIMEOUT)
                .setLocal(true)
                .get()
                .getState()
                .blocks()
                .global(ClusterBlockLevel.METADATA_WRITE),
            hasItem(GatewayService.STATE_NOT_RECOVERED_BLOCK)
        );
        assertThat(
            master2.admin()
                .cluster()
                .prepareState(TEST_REQUEST_TIMEOUT)
                .setLocal(true)
                .get()
                .getState()
                .blocks()
                .global(ClusterBlockLevel.METADATA_WRITE),
            hasItem(GatewayService.STATE_NOT_RECOVERED_BLOCK)
        );

        logger.info("--> start data_node (2)");
        Client data2 = startNode(Settings.builder().put(RECOVER_AFTER_DATA_NODES_SETTING.getKey(), 2).put(dataOnlyNode()));
        assertThat(waitForNoBlocksOnNode(BLOCK_WAIT_TIMEOUT, master1).isEmpty(), equalTo(true));
        assertThat(waitForNoBlocksOnNode(BLOCK_WAIT_TIMEOUT, master2).isEmpty(), equalTo(true));
        assertThat(waitForNoBlocksOnNode(BLOCK_WAIT_TIMEOUT, data1).isEmpty(), equalTo(true));
        assertThat(waitForNoBlocksOnNode(BLOCK_WAIT_TIMEOUT, data2).isEmpty(), equalTo(true));
    }
}