package com.jjt.in.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.jjt.common.constant.Constants;
import com.jjt.common.domain.IndexDO;
import com.jjt.common.utils.LinuxCommand;
import com.jjt.in.service.IInEsService;
import com.jjt.system.service.ISysConfigService;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.CreateIndexResponse;
import org.elasticsearch.common.settings.Settings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.io.*;
import java.util.ArrayList;
import java.util.List;

/**
 * 数据同步Service业务层处理
 *
 * @author wukai
 * @date 2023-06-06
 */
@Service
public class InEsServiceImpl extends InBaseService implements IInEsService {
    private static final Logger log = LoggerFactory.getLogger(InEsServiceImpl.class);
    @Resource
    private ISysConfigService sysConfigService;


    /**
     * 解析同步文件
     */
    @Override
    public void parseSyncFile(String dir) {
        String params = sysConfigService.selectConfigByKey("in.es.connect");

        JSONObject jsonObject = JSONObject.parseObject(params);
        String hostname = jsonObject.getString("hostname");
        int port = jsonObject.getIntValue("port");
        String scheme = jsonObject.getString("scheme");
        if (!dir.endsWith(Constants.DIR_END)) {
            dir += "/";
        }
        try {
            // 创建File对象
            File file = new File(dir);
            if (file.isDirectory()) {
                // 判断File对象对应的目录是否存在
                String[] names = file.list();
                // 获得目录下的所有文件的文件名
                for (String name : names) {
                    if (name.startsWith("base_")) {
                        File baseFile = new File(dir + name);
                        ObjectMapper mapper = new ObjectMapper();
                        IndexDO ido = mapper.readValue(baseFile, IndexDO.class);

                        boolean flag = createIndex(ido);

                        if (flag) {
                            String uri = scheme + "://" + hostname + ":" + port + "/" + ido.getIndexName();

                            String mappingName = "mapping_" + ido.getIndexName();
                            String dataName = "data_" + ido.getIndexName();
                            try {
                                //导入mapping命令
                                List<String> commands = new ArrayList<>();
                                commands.add("/usr/bin/elasticdump");
                                commands.add("--input");
                                commands.add(dir + mappingName + ".json");
                                commands.add("--output");
                                commands.add(uri);
                                commands.add("--type=mapping");
                                LinuxCommand.exec(commands);
                                //导入data命令
                                commands = new ArrayList<>();
                                commands.add("/usr/bin/elasticdump");
                                commands.add("--input");
                                commands.add(dir + dataName + ".json");
                                commands.add("--output");
                                commands.add(uri);
                                commands.add("--type=data");
                                LinuxCommand.exec(commands);
                            } catch (Exception e) {
                                log.error("执行命令出错：");
                                throw new RuntimeException(e);
                            }
                        }
                    }
                }
            }
        } catch (IOException e) {
            log.error("处理es出错啦：{}", e.getMessage());
        }
    }

    private boolean createIndex(IndexDO ido) {
        try (RestHighLevelClient client = getClient()) {
            CreateIndexRequest request = new CreateIndexRequest(ido.getIndexName());

            Settings.Builder settings = Settings.builder();
            settings.put("index.number_of_shards", ido.getNumberOfShards());
            settings.put("index.number_of_replicas", ido.getNumberOfReplicas());

            request.settings(settings);

            CreateIndexResponse response = client.indices().create(request, RequestOptions.DEFAULT);
            return response.isAcknowledged();
        } catch (Exception e) {
            //如果是报已存在,就不管了噻
            if (!e.getMessage().contains(Constants.RESOURCE_ALREADY_EXISTS_EXCEPTION)) {
                log.error("创建出错啦:", e.getMessage());
                return false;
            } else {
                return true;
            }
        }
    }


    /**
     * 获取es客户端
     *
     * @return 客户端
     */
    private RestHighLevelClient getClient() {
        String params = sysConfigService.selectConfigByKey("in.es.connect");

        JSONObject jsonObject = JSONObject.parseObject(params);
        String hostname = jsonObject.getString("hostname");
        int port = jsonObject.getIntValue("port");
        String scheme = jsonObject.getString("scheme");

        return new RestHighLevelClient(RestClient.builder(new HttpHost(hostname, port, scheme)));
    }
}