package com.yihu.elasticsearch;

import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.expr.SQLQueryExpr;
import com.alibaba.druid.sql.parser.SQLExprParser;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.yihu.elasticsearch.ElasticSearchPool;
import io.searchbox.client.JestClient;
import io.searchbox.client.JestResult;
import io.searchbox.core.*;
import org.apache.commons.collections.CollectionUtils;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.nlpcn.es4sql.domain.Select;
import org.nlpcn.es4sql.jdbc.ObjectResult;
import org.nlpcn.es4sql.jdbc.ObjectResultsExtractor;
import org.nlpcn.es4sql.parse.ElasticSqlExprParser;
import org.nlpcn.es4sql.parse.SqlParser;
import org.nlpcn.es4sql.query.AggregationQueryAction;
import org.nlpcn.es4sql.query.DefaultQueryAction;
import org.nlpcn.es4sql.query.SqlElasticSearchRequestBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DecimalFormat;
import java.util.*;

;

/**
 * Created by chenweida on 2017/6/2.
 */
@Component
@Scope("prototype")
public class ElasticSearchHelper {

    private Logger logger = LoggerFactory.getLogger(ElasticSearchHelper.class);
    @Autowired
    private ElasticSearchPool elasticSearchPool;

    private JestClient jestClient;

    @Value("${es.host}")
    private String esHost;

    @Autowired
    private ObjectMapper objectMapper;

    private static String[] curlCmds = new String[6];

    @PostConstruct
    public void init() {
        jestClient = elasticSearchPool.getJestClient();
        // curl命令格式
        String url = esHost.split(",")[0].replace("http://", "").concat("/_sql");
        curlCmds[0] = "curl";
        curlCmds[1] = url;
        curlCmds[2] = "-H";
        curlCmds[3] = "Content-Type: application/json";
        curlCmds[4] = "-d";
    }

    public <T> Boolean save(String index, String type, List<T> sources) throws IOException {
        Bulk.Builder bulk = (new Bulk.Builder()).defaultIndex(index).defaultType(type);
        sources.forEach((item) -> {
            Index indexObj = (new Index.Builder(item)).build();
            bulk.addAction(indexObj);
        });
        BulkResult br = (BulkResult)this.jestClient.execute(bulk.build());
        this.logger.debug("save flag: " + br.isSucceeded());
        return br.isSucceeded();
    }

    public Boolean save (String index, String type, String source) throws IOException {
        Bulk.Builder bulk = new Bulk.Builder().defaultIndex(index).defaultType(type);
        Index indexObj = new Index.Builder(source).build();
        bulk.addAction(indexObj);
        BulkResult br = jestClient.execute(bulk.build());
        logger.debug("save flag: " + br.isSucceeded());
        return br.isSucceeded();
    }

    public Boolean save(String index, String type, String source,String errMsg) throws IOException {
        Bulk.Builder bulk = (new Bulk.Builder()).defaultIndex(index).defaultType(type);
        Index indexObj = (new Index.Builder(source)).build();
        bulk.addAction(indexObj);
        BulkResult br = (BulkResult)this.jestClient.execute(bulk.build());
        if(!br.isSucceeded()){
            this.logger.error("save flag: " + br.isSucceeded());
            errMsg = br.getErrorMessage();
        }
        return br.isSucceeded();
    }

    public Boolean saveWithCustomId(String index, String type, String source, String idFieldString,StringBuilder errMsg) throws IOException {
        Bulk.Builder bulk = (new Bulk.Builder()).defaultIndex(index).defaultType(type);
        JSONObject jsonObject = (JSONObject)(JSONObject.parse(source));
        Index indexObj = ((Index.Builder)(new Index.Builder(source)).id(jsonObject.getString(idFieldString))).build();
        bulk.addAction(indexObj);
        BulkResult br = (BulkResult)this.jestClient.execute(bulk.build());
        if(!br.isSucceeded()){
            errMsg.append(br.getJsonString());
            this.logger.error("save flag: " + br.isSucceeded() + "  " + errMsg.toString());
        }
        return br.isSucceeded();
    }

    public Boolean saveBulkWithCustomId(String index, String type, List<String> sources, String idFieldString) throws IOException {
        Bulk.Builder bulk = (new Bulk.Builder()).defaultIndex(index).defaultType(type);
        sources.forEach((item) -> {
            JSONObject jsonObject = (JSONObject)((JSONObject)JSONObject.parse(item));
            Index indexObj = ((Index.Builder)(new Index.Builder(item)).id(jsonObject.getString(idFieldString))).build();
            bulk.addAction(indexObj);
        });
        BulkResult br = (BulkResult)this.jestClient.execute(bulk.build());
        this.logger.debug("save flag: " + br.isSucceeded());
        return br.isSucceeded();
    }

    public <T> Boolean update(String index, String type, List<T> sources) throws IOException {
        Bulk.Builder bulk = (new Bulk.Builder()).defaultIndex(index).defaultType(type);
        sources.forEach((item) -> {
            JSONObject jo = new JSONObject();
            jo.put("doc", item);
//            Update indexObj = ((io.searchbox.core.Update.Builder)((io.searchbox.core.Update.Builder)((Builder)(new Builder(jo.toString())).index(index)).type(type)).id((item).getId())).build();
//            bulk.addAction(indexObj);
        });
        BulkResult br = (BulkResult)this.jestClient.execute(bulk.build());
        this.logger.debug("update flag: " + br.isSucceeded());
        return br.isSucceeded();
    }

    public Boolean updateByMap(String index, String type, List<Map<String, Object>> list) throws IOException {
        Bulk.Builder bulk = (new Bulk.Builder()).defaultIndex(index).defaultType(type);
        Iterator var10 = list.iterator();

        while(var10.hasNext()) {
            Map map = (Map)var10.next();
            JSONObject jo = new JSONObject();
            jo.put("doc", map);
            Update indexObj = ((Update.Builder)((Update.Builder)((Update.Builder)(new Update.Builder(jo.toString())).index(index)).type(type)).id(String.valueOf(map.get("id")))).build();
            bulk.addAction(indexObj);
        }

        BulkResult br = (BulkResult)this.jestClient.execute(bulk.build());
        this.logger.debug("update flag: " + br.isSucceeded());
        return br.isSucceeded();
    }

    public boolean update(String index, String type, String _id, JSONObject source) throws IOException {
        JSONObject docSource = new JSONObject();
        docSource.put("doc", source);
        Update update = ((Update.Builder)((Update.Builder)((Update.Builder)(new Update.Builder(docSource)).index(index)).type(type)).id(_id)).build();
        JestResult jestResult = this.jestClient.execute(update);
        this.logger.debug("update info: " + jestResult.isSucceeded());
        return true;
    }

    public boolean delete(String index, String type, List<Map<String, Object>> datas) throws IOException {
        Bulk.Builder bulk = (new Bulk.Builder()).defaultIndex(index).defaultType(type);
        Iterator var5 = datas.iterator();

        while(var5.hasNext()) {
            Map map = (Map)var5.next();
            if (map.containsKey("id") && map.containsKey("_id")) {
                Delete indexObj = null;
                if (null != map.get("_id")) {
                    indexObj = (new Delete.Builder(map.get("_id").toString())).build();
                } else if (null != map.get("id")) {
                    indexObj = (new Delete.Builder(map.get("id").toString())).build();
                }

                bulk.addAction(indexObj);
            }
        }

        BulkResult br = (BulkResult)this.jestClient.execute(bulk.build());
        this.logger.debug("delete data count: " + datas.size());
        this.logger.debug("delete flag: " + br.isSucceeded());
        return br.isSucceeded();
    }

    public SearchResult search(String index, String type, String queryStr) throws IOException {
        Search search = ((Search.Builder)((Search.Builder)(new Search.Builder(queryStr)).addIndex(index)).addType(type)).build();
        SearchResult result = (SearchResult)this.jestClient.execute(search);
        this.logger.info("search data count: " + result.getTotal());
        return result;
    }

    public List<Map<String, Object>> executeSQL(String sql) throws Exception {
        List<Map<String, Object>> returnModels = new ArrayList();
        SQLExprParser parser = new ElasticSqlExprParser(sql);
        SQLExpr expr = parser.expr();
        SQLQueryExpr queryExpr = (SQLQueryExpr)expr;
//        SQLBinaryExpr queryExpr = (SQLBinaryExpr)expr;
        Select select = (new SqlParser()).parseSelect(queryExpr);
        AggregationQueryAction action = null;
        DefaultQueryAction queryAction = null;
        SqlElasticSearchRequestBuilder requestBuilder = null;
        if (select.isAgg) {
            action = new AggregationQueryAction(this.elasticSearchPool.getClient(), select);
            requestBuilder = action.explain();
        } else {
            Client client = this.elasticSearchPool.getClient();
            queryAction = new DefaultQueryAction(client, select);
            requestBuilder = queryAction.explain();
        }

        SearchResponse response = (SearchResponse)requestBuilder.get();
        Object queryResult = null;
        if (sql.toUpperCase().indexOf("GROUP") == -1 && sql.toUpperCase().indexOf("SUM") == -1 && sql.toUpperCase().indexOf("COUNT(") == -1) {
            queryResult = response.getHits();
        } else {
            queryResult = response.getAggregations();
        }

        ObjectResult temp = (new ObjectResultsExtractor(true, true, true)).extractResults(queryResult, true);
        List<String> heads = temp.getHeaders();
        temp.getLines().stream().forEach((one) -> {
            Map<String, Object> oneMap = new HashMap();

            for(int i = 0; i < one.size(); ++i) {
                Object value = one.get(i);
                String key = (String)heads.get(i);
                oneMap.put(key, value);
            }

            returnModels.add(oneMap);
        });
        return returnModels;
    }

    public Integer executeCountSQL(String sql) throws Exception {
        SQLQueryExpr queryExpr = new SQLQueryExpr();
        Select select = (new SqlParser()).parseSelect(queryExpr);
        SqlElasticSearchRequestBuilder requestBuilder;
        if (select.isAgg) {
            AggregationQueryAction action = new AggregationQueryAction(this.elasticSearchPool.getClient(), select);
            requestBuilder = action.explain();
        } else {
            Client client = this.elasticSearchPool.getClient();
            DefaultQueryAction queryAction = new DefaultQueryAction(client, select);
            requestBuilder = queryAction.explain();
        }

        SearchResponse response = (SearchResponse)requestBuilder.get();
        Object queryResult;
        if (sql.toUpperCase().indexOf("GROUP") == -1 && sql.toUpperCase().indexOf("SUM") == -1 && sql.toUpperCase().indexOf("COUNT(") == -1) {
            queryResult = response.getHits();
        } else {
            queryResult = response.getAggregations();
        }

        ObjectResult temp = (new ObjectResultsExtractor(true, true, true)).extractResults(queryResult, true);

        for(int j = 0; j < temp.getLines().size(); ++j) {
            List<Object> one = (List)temp.getLines().get(j);

            for(int i = 0; i < one.size(); ++i) {
                Object value = one.get(i);
                if (value instanceof Double) {
                    Double valueTemp = (Double)value;
                    DecimalFormat df = new DecimalFormat("######0");
                    return Integer.parseInt(df.format(valueTemp));
                }
            }
        }

        return 0;
    }

    /**
     * 使用curl方式执行 es-sql 查询操作
     * @param sql
     * @return
     */
    public List<JSONObject> execCurl(String sql){
        List<JSONObject> result = new ArrayList<>();
        curlCmds[5] = sql;
        ProcessBuilder process = new ProcessBuilder(curlCmds);
        Process p;
        StringBuilder builder = new StringBuilder();
        try {
            p = process.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
                builder.append(line);
                builder.append(System.getProperty("line.separator"));
            }

        } catch (IOException e) {
            System.out.print("error");
            e.printStackTrace();
        }
        try {
            logger.info("request curlCmds:" + objectMapper.writeValueAsString(curlCmds));
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        String esResponse = builder.toString();
        logger.info("esResponse:" + esResponse);
        JSONObject esResObj = JSONObject.parseObject(esResponse);
        if(null != esResObj){
            if(null == (esResObj.get("error"))){
                if(esResObj.getJSONObject("_shards").getIntValue("total") > 0){
                    List resList = JSONObject.parseObject(esResponse).getJSONObject("hits").getJSONArray("hits");
                    if(!CollectionUtils.isEmpty(resList)){
                        resList.forEach(
                                one->{
                                    JSONObject oneHit = (JSONObject)one;
                                    result.add(oneHit.getJSONObject("_source"));
                                }
                        );

                    }
                }
            }
        }
        logger.info("execCurl result:"+result.toString());
        return result;
    }
}