package com.yihu.wlyy.util;

import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.expr.SQLQueryExpr;
import com.alibaba.druid.sql.parser.SQLExprParser;
import com.yihu.wlyy.config.es.ElasticFactory;
import org.elasticsearch.action.search.SearchResponse;
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.stereotype.Component;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by chenweida on 2017/7/17.
 * SELECT town,townName,sum(result1) result1 FROM wlyy_quota_test
 * where quotaCode='1'
 * group by town,townName ， date_histogram(field='quotaDate','interval'='week')
 */
@Component
public class ElasticsearchUtil {

    private Logger logger = LoggerFactory.getLogger(ElasticsearchUtil.class);

    @Autowired
    private ElasticFactory elasticFactory;

    public List excute(String sql, Class clazz, String esType, String esIndex) {
        List saveModels = new ArrayList<>();
        try {
            SQLExprParser parser = new ElasticSqlExprParser(sql);
            SQLExpr expr = parser.expr();
            SQLQueryExpr queryExpr = (SQLQueryExpr) expr;

            Select select = null;
            select = new SqlParser().parseSelect(queryExpr);

            //通过抽象语法树，封装成自定义的Select，包含了select、from、where group、limit等
            AggregationQueryAction action = null;
            DefaultQueryAction queryAction = null;
            SqlElasticSearchRequestBuilder requestBuilder = null;
            if (select.isAgg) {
                //包含计算的的排序分组的
                action = new AggregationQueryAction(elasticFactory.getTransportClient(), select);
                requestBuilder = action.explain();
            } else {
                //封装成自己的Select对象
                queryAction = new DefaultQueryAction(elasticFactory.getTransportClient(), select);
                requestBuilder = queryAction.explain();
            }
            SearchResponse response = (SearchResponse) requestBuilder.get();
            ObjectResult temp = new ObjectResultsExtractor(true, true, true).extractResults(response.getAggregations(), true);
            List<String> heads = temp.getHeaders();
            temp.getLines().stream().forEach(one -> {
                Object saveModel = null;
                try {
                    saveModel = clazz.newInstance();
                } catch (Exception e) {
                    logger.error(e.getMessage());
                }
                for (int i = 0; i < one.size(); i++) {
                    try {
                        String key = null;
                        Object value = one.get(i);
                        if (heads.get(i).contains("date_histogram")) {
                            key = "setQuotaDate";
                            value = DateUtil.strToDate(String.valueOf(value), "yyyy-MM-dd HH:mm:ss");
                        } else {
                            key = "set" + UpFirstStr(heads.get(i));
                        }

                        if (value instanceof String) {
                            clazz.getMethod(key, String.class).invoke(saveModel, value);
                        } else if (value instanceof Integer) {
                            clazz.getMethod(key, Integer.class).invoke(saveModel, value);
                        } else if (value instanceof Double) {
                            clazz.getMethod(key, Integer.class).invoke(saveModel, ((Double) value).intValue());
                        } else if (value instanceof java.util.Date) {
                            clazz.getMethod(key, java.util.Date.class).invoke(saveModel, value);
                        }
                    } catch (Exception e) {
                        logger.warn(e.getMessage());
                    }
                }
                saveModels.add(saveModel);
            });
        } catch (Exception e) {
            logger.error(e.getMessage());
        }
        return saveModels;
    }

    public Long excuteForLong(String sql, String esType, String esIndex) {
        try {
            SQLExprParser parser = new ElasticSqlExprParser(sql);
            SQLExpr expr = parser.expr();
            SQLQueryExpr queryExpr = (SQLQueryExpr) expr;

            Select select = null;
            select = new SqlParser().parseSelect(queryExpr);

            //通过抽象语法树，封装成自定义的Select，包含了select、from、where group、limit等
            AggregationQueryAction action = null;
            DefaultQueryAction queryAction = null;
            SqlElasticSearchRequestBuilder requestBuilder = null;
            if (select.isAgg) {
                //包含计算的的排序分组的
                action = new AggregationQueryAction(elasticFactory.getTransportClient(), select);
                requestBuilder = action.explain();
            } else {
                //封装成自己的Select对象
                queryAction = new DefaultQueryAction(elasticFactory.getTransportClient(), select);
                requestBuilder = queryAction.explain();
            }
            SearchResponse response = (SearchResponse) requestBuilder.get();
            ObjectResult temp = new ObjectResultsExtractor(true, true, true).extractResults(response.getAggregations(), true);
            Long Longvalue = ((Double) temp.getLines().get(0).get(1)).longValue();
            return Longvalue;
        } catch (Exception e) {
            logger.error(e.getMessage());
        }
        return 0L;
    }

    /**
     * 首字母大写
     *
     * @param str
     * @return
     */
    private String UpFirstStr(String str) {
        return str.replaceFirst(str.substring(0, 1), str.substring(0, 1).toUpperCase());
    }

    public Object excuteOneObject(String sql, Class clazz, String esType, String esIndex) {
        try {
            SQLExprParser parser = new ElasticSqlExprParser(sql);
            SQLExpr expr = parser.expr();
            SQLQueryExpr queryExpr = (SQLQueryExpr) expr;

            Select select = null;
            select = new SqlParser().parseSelect(queryExpr);

            //通过抽象语法树，封装成自定义的Select，包含了select、from、where group、limit等
            AggregationQueryAction action = null;
            DefaultQueryAction queryAction = null;
            SqlElasticSearchRequestBuilder requestBuilder = null;
            if (select.isAgg) {
                //包含计算的的排序分组的
                action = new AggregationQueryAction(elasticFactory.getTransportClient(), select);
                requestBuilder = action.explain();
            } else {
                //封装成自己的Select对象
                queryAction = new DefaultQueryAction(elasticFactory.getTransportClient(), select);
                requestBuilder = queryAction.explain();
            }
            SearchResponse response = (SearchResponse) requestBuilder.get();
            ObjectResult temp = new ObjectResultsExtractor(true, true, true).extractResults(response.getHits(), true);
            List<String> heads = temp.getHeaders();
            Object saveModel = clazz.newInstance();
            try {
                for (int i = 0; i < temp.getLines().get(0).size(); i++) {
                    String key = null;
                    Object value = temp.getLines().get(0).get(i);
                    if (heads.get(i).contains("createTime")) {
                        key = "setCreateTime";
                        value = DateUtil.strToDate(String.valueOf(value).replace("+0800","").replace("T"," "), "yyyy-MM-dd HH:mm:ss");
                    } else {
                        key = "set" + UpFirstStr(heads.get(i));
                    }

                    if (value instanceof String) {
                        clazz.getMethod(key, String.class).invoke(saveModel, value);
                    } else if (value instanceof Integer) {
                        clazz.getMethod(key, Integer.class).invoke(saveModel, value);
                    } else if (value instanceof Double) {
                        clazz.getMethod(key, Integer.class).invoke(saveModel, ((Double) value).intValue());
                    } else if (value instanceof java.util.Date) {
                        clazz.getMethod(key, java.util.Date.class).invoke(saveModel, value);
                    }
                }
            } catch (Exception e) {
                logger.warn(e.getMessage());
            }
            return saveModel;
        } catch (Exception e) {
            logger.error(e.getMessage());
        }
        return null;
    }
}