/*
 * 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.plugin.discovery.azure.classic;

import org.elasticsearch.cloud.azure.classic.management.AzureComputeService;
import org.elasticsearch.cloud.azure.classic.management.AzureComputeServiceImpl;
import org.elasticsearch.common.logging.DeprecationCategory;
import org.elasticsearch.common.logging.DeprecationLogger;
import org.elasticsearch.common.network.NetworkService;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.discovery.SeedHostsProvider;
import org.elasticsearch.discovery.azure.classic.AzureSeedHostsProvider;
import org.elasticsearch.logging.LogManager;
import org.elasticsearch.logging.Logger;
import org.elasticsearch.plugins.DiscoveryPlugin;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.transport.TransportService;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.function.Supplier;

public class AzureDiscoveryPlugin extends Plugin implements DiscoveryPlugin {

    public static final String AZURE = "azure";
    protected final Settings settings;
    private static final Logger logger = LogManager.getLogger(AzureDiscoveryPlugin.class);
    private static final DeprecationLogger deprecationLogger = DeprecationLogger.getLogger(AzureDiscoveryPlugin.class);

    public AzureDiscoveryPlugin(Settings settings) {
        this.settings = settings;
        deprecationLogger.warn(DeprecationCategory.PLUGINS, "azure_discovery_plugin", "azure classic discovery plugin is deprecated.");
        logger.trace("starting azure classic discovery plugin...");
    }

    // overrideable for tests
    protected AzureComputeService createComputeService() {
        return new AzureComputeServiceImpl(settings);
    }

    @Override
    public Map<String, Supplier<SeedHostsProvider>> getSeedHostProviders(TransportService transportService, NetworkService networkService) {
        return Collections.singletonMap(
            AZURE,
            () -> createSeedHostsProvider(settings, createComputeService(), transportService, networkService)
        );
    }

    // Used for testing
    protected AzureSeedHostsProvider createSeedHostsProvider(
        final Settings settingsToUse,
        final AzureComputeService azureComputeService,
        final TransportService transportService,
        final NetworkService networkService
    ) {
        return new AzureSeedHostsProvider(settingsToUse, azureComputeService, transportService, networkService);
    }

    @Override
    public List<Setting<?>> getSettings() {
        return Arrays.asList(
            AzureComputeService.Discovery.REFRESH_SETTING,
            AzureComputeService.Management.KEYSTORE_PASSWORD_SETTING,
            AzureComputeService.Management.KEYSTORE_PATH_SETTING,
            AzureComputeService.Management.KEYSTORE_TYPE_SETTING,
            AzureComputeService.Management.SUBSCRIPTION_ID_SETTING,
            AzureComputeService.Management.SERVICE_NAME_SETTING,
            AzureComputeService.Discovery.HOST_TYPE_SETTING,
            AzureComputeService.Discovery.DEPLOYMENT_NAME_SETTING,
            AzureComputeService.Discovery.DEPLOYMENT_SLOT_SETTING,
            AzureComputeService.Discovery.ENDPOINT_NAME_SETTING
        );
    }
}