package com.gzzn.omms.msgexchangeapi.elasticsearch;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import javax.annotation.PostConstruct;

import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexResponse;
import org.elasticsearch.action.admin.indices.exists.indices.IndicesExistsRequest;
import org.elasticsearch.action.admin.indices.exists.indices.IndicesExistsResponse;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequestBuilder;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import com.alibaba.fastjson.JSONObject;

@Component
public class ElasticsearchUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(ElasticsearchUtil.class);

    @Autowired
    private TransportClient transportClient;
    private static TransportClient client;

    /**
     * @PostContruct是spring框架的注解 spring容器初始化的时候执行该方法
     */
	@PostConstruct
    public void init() {
        client = this.transportClient;
    }

    /**
     * 创建索引
     *
     * @param index
     * @return
     */
    public static boolean createIndex(String index) {
        if (!isIndexExist(index)) {
            LOGGER.info("Index is not exits!");
        }
        CreateIndexResponse indexresponse = client.admin().indices().prepareCreate(index).execute().actionGet();
        LOGGER.info("执行建立成功？" + indexresponse.isAcknowledged());
        return indexresponse.isAcknowledged();
    }

    /**
     * 删除索引
     *
     * @param index
     * @return
     */
    public static boolean deleteIndex(String index) {
        if (!isIndexExist(index)) {
            LOGGER.info("Index is not exits!");
        }
        DeleteIndexResponse dResponse = client.admin().indices().prepareDelete(index).execute().actionGet();
        if (dResponse.isAcknowledged()) {
            LOGGER.info("delete index " + index + "  successfully!");
        } else {
            LOGGER.info("Fail to delete index " + index);
        }
        return dResponse.isAcknowledged();
    }

    /**
     * 判断索引是否存在
     *
     * @param index
     * @return
     */
    public static boolean isIndexExist(String index) {
        IndicesExistsResponse inExistsResponse = client.admin().indices().exists(new IndicesExistsRequest(index)).actionGet();
        if (inExistsResponse.isExists()) {
            LOGGER.info("Index [" + index + "] is exist!");
        } else {
            LOGGER.info("Index [" + index + "] is not exist!");
        }
        return inExistsResponse.isExists();
    }

    /**
     * @Author: LX
     * @Description: 判断inde下指定type是否存在
     * @Date: 2018/11/6 14:46
     * @Modified by:
     */
    public boolean isTypeExist(String index, String type) {
        return isIndexExist(index)
                ? client.admin().indices().prepareTypesExists(index).setTypes(type).execute().actionGet().isExists()
                : false;
    }

    /**
     * 数据添加，正定ID
     *
     * @param jsonObject 要增加的数据
     * @param index      索引，类似数据库
     * @param type       类型，类似表
     * @param id         数据ID
     * @return
     */
    public static String addData(JSONObject jsonObject, String index, String type, String id) {
        IndexResponse response = client.prepareIndex(index, type, id).setSource(jsonObject).get();
        LOGGER.info("addData response status:{},id:{}", response.status().getStatus(), response.getId());
        return response.getId();
    }

    /**
     * 数据添加
     *
     * @param jsonObject 要增加的数据
     * @param index      索引，类似数据库
     * @param type       类型，类似表
     * @return
     */
    public static String addData(JSONObject jsonObject, String index, String type) {
        return addData(jsonObject, index, type, ElasticsearchUtil.getUUID32());
    }

    /**
     * 通过ID删除数据
     *
     * @param index 索引，类似数据库
     * @param type  类型，类似表
     * @param id    数据ID
     */
    public static void deleteDataById(String index, String type, String id) {

        DeleteResponse response = client.prepareDelete(index, type, id).execute().actionGet();

        LOGGER.info("deleteDataById response status:{},id:{}", response.status().getStatus(), response.getId());
    }

    /**
     * 通过ID 更新数据
     *
     * @param jsonObject 要增加的数据
     * @param index      索引，类似数据库
     * @param type       类型，类似表
     * @param id         数据ID
     * @return
     */
    public static void updateDataById(JSONObject jsonObject, String index, String type, String id) {

        UpdateRequest updateRequest = new UpdateRequest();

        updateRequest.index(index).type(type).id(id).doc(jsonObject);

        client.update(updateRequest);

    }

    /**
     * 通过ID获取数据
     *
     * @param index  索引，类似数据库
     * @param type   类型，类似表
     * @param id     数据ID
     * @param fields 需要显示的字段，逗号分隔（缺省为全部字段）
     * @return
     */
    public static Map<String, Object> searchDataById(String index, String type, String id, String fields) {

        GetRequestBuilder getRequestBuilder = client.prepareGet(index, type, id);

        if (!StringUtils.isEmpty(fields)) {
            getRequestBuilder.setFetchSource(fields.split(","), null);
        }

        GetResponse getResponse = getRequestBuilder.execute().actionGet();

        return getResponse.getSource();
    }




    /**
     * 使用分词查询
     *
     * @param index          索引名称
     * @param type           类型名称,可传入多个type逗号分隔
     * @param query          查询条件
     * @param size           文档大小限制
     * @param fields         需要显示的字段，逗号分隔（缺省为全部字段）
     * @param sortField      排序字段
     * @param sortOrder 
     * @param highlightField 高亮字段
     * @return
     */
    public static List<Map<String, Object>> searchListData(
            String index, String type, QueryBuilder query, Integer size,
            String fields, String sortField, SortOrder sortOrder, String highlightField) {

        SearchRequestBuilder searchRequestBuilder = client.prepareSearch(index);
        if (!StringUtils.isEmpty(type)) {
            searchRequestBuilder.setTypes(type.split(","));
        }

        if (!StringUtils.isEmpty(highlightField)) {
            HighlightBuilder highlightBuilder = new HighlightBuilder();
            // 设置高亮字段
            highlightBuilder.field(highlightField);
            searchRequestBuilder.highlighter(highlightBuilder);
        }

        searchRequestBuilder.setQuery(query);

        if (!StringUtils.isEmpty(fields)) {
            searchRequestBuilder.setFetchSource(fields.split(","), null);
        }
        searchRequestBuilder.setFetchSource(true);

        if (!StringUtils.isEmpty(sortField)) {
        	if(null==sortOrder){
        		sortOrder = SortOrder.DESC;
        	}
            searchRequestBuilder.addSort(sortField, sortOrder);
        }

        if (size != null && size > 0) {
            searchRequestBuilder.setSize(size);
        }

        //打印的内容 可以在 Elasticsearch head 和 Kibana  上执行查询
        LOGGER.info("\n{}", searchRequestBuilder);

        SearchResponse searchResponse = searchRequestBuilder.execute().actionGet();

        long totalHits = searchResponse.getHits().totalHits;
        long length = searchResponse.getHits().getHits().length;

        LOGGER.info("共查询到[{}]条数据,处理数据条数[{}]", totalHits, length);

        if (searchResponse.status().getStatus() == 200) {
            // 解析对象
            return setSearchResponse(searchResponse, highlightField);
        }
        return null;

    }


    /**
     * 高亮结果集 特殊处理
     *
     * @param searchResponse
     * @param highlightField
     */
    private static List<Map<String, Object>> setSearchResponse(SearchResponse searchResponse, String highlightField) {
        List<Map<String, Object>> sourceList = new ArrayList<Map<String, Object>>();
        StringBuffer stringBuffer = new StringBuffer();
        for (SearchHit searchHit : searchResponse.getHits().getHits()) {
            searchHit.getSourceAsMap().put("id", searchHit.getId());

            if (!StringUtils.isEmpty(highlightField)) {

                System.out.println("遍历 高亮结果集，覆盖 正常结果集" + searchHit.getSourceAsMap());
                Text[] text = searchHit.getHighlightFields().get(highlightField).getFragments();

                if (text != null) {
                    for (Text str : text) {
                        stringBuffer.append(str.string());
                    }
					//遍历 高亮结果集，覆盖 正常结果集
                    searchHit.getSourceAsMap().put(highlightField, stringBuffer.toString());
                }
            }
            sourceList.add(searchHit.getSourceAsMap());
        }
        return sourceList;
    }
    
    private static String getUUID32(){
	    String uuid = UUID.randomUUID().toString().replace("-", "").toLowerCase();
	    return uuid;
	}
    
}