/*
 * 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.ingest.geoip.stats;

import org.elasticsearch.action.FailedNodeException;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.nodes.TransportNodesAction;
import org.elasticsearch.cluster.metadata.ProjectId;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.project.ProjectResolver;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.ingest.geoip.DatabaseNodeService;
import org.elasticsearch.ingest.geoip.GeoIpDownloader;
import org.elasticsearch.ingest.geoip.GeoIpDownloaderTaskExecutor;
import org.elasticsearch.ingest.geoip.stats.GeoIpStatsAction.NodeRequest;
import org.elasticsearch.ingest.geoip.stats.GeoIpStatsAction.NodeResponse;
import org.elasticsearch.ingest.geoip.stats.GeoIpStatsAction.Request;
import org.elasticsearch.ingest.geoip.stats.GeoIpStatsAction.Response;
import org.elasticsearch.injection.guice.Inject;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

import java.io.IOException;
import java.util.List;

public class GeoIpStatsTransportAction extends TransportNodesAction<Request, Response, NodeRequest, NodeResponse, Void> {

    private final DatabaseNodeService registry;
    private final GeoIpDownloaderTaskExecutor geoIpDownloaderTaskExecutor;
    private final ProjectResolver projectResolver;

    @Inject
    public GeoIpStatsTransportAction(
        TransportService transportService,
        ClusterService clusterService,
        ThreadPool threadPool,
        ActionFilters actionFilters,
        DatabaseNodeService registry,
        GeoIpDownloaderTaskExecutor geoIpDownloaderTaskExecutor,
        ProjectResolver projectResolver
    ) {
        super(
            GeoIpStatsAction.INSTANCE.name(),
            clusterService,
            transportService,
            actionFilters,
            NodeRequest::new,
            threadPool.executor(ThreadPool.Names.MANAGEMENT)
        );
        this.registry = registry;
        this.geoIpDownloaderTaskExecutor = geoIpDownloaderTaskExecutor;
        this.projectResolver = projectResolver;
    }

    @Override
    protected Response newResponse(Request request, List<NodeResponse> nodeResponses, List<FailedNodeException> failures) {
        return new Response(clusterService.getClusterName(), nodeResponses, failures);
    }

    @Override
    protected NodeRequest newNodeRequest(Request request) {
        return new NodeRequest();
    }

    @Override
    protected NodeResponse newNodeResponse(StreamInput in, DiscoveryNode node) throws IOException {
        return new NodeResponse(in);
    }

    @Override
    protected NodeResponse nodeOperation(NodeRequest request, Task task) {
        ProjectId projectId = projectResolver.getProjectId();
        GeoIpDownloader geoIpTask = geoIpDownloaderTaskExecutor.getTask(projectId);
        GeoIpDownloaderStats downloaderStats = geoIpTask == null || geoIpTask.getStatus() == null ? null : geoIpTask.getStatus();
        CacheStats cacheStats = registry.getCacheStats();
        return new NodeResponse(
            transportService.getLocalNode(),
            downloaderStats,
            cacheStats,
            registry.getAvailableDatabases(projectId),
            registry.getFilesInTemp(projectId),
            registry.getConfigDatabases()
        );
    }
}