package com.highdatas.mdm.service.impl;

import com.alibaba.druid.pool.DruidDataSource;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.highdatas.mdm.entity.SysAssemble;
import com.highdatas.mdm.entity.SysAssembleDb;
import com.highdatas.mdm.entity.SysAssembleDbdriver;
import com.highdatas.mdm.mapper.SysAssembleDbMapper;
import com.highdatas.mdm.pojo.kettle.UnBigDataDataSourceInfo;
import com.highdatas.mdm.service.ISysAssembleDbService;
import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import com.highdatas.mdm.service.ISysAssembleDbdriverService;
import com.highdatas.mdm.service.ISysAssembleService;
import com.highdatas.mdm.util.Constant;
import org.apache.commons.lang3.StringUtils;
import org.pentaho.di.core.KettleClientEnvironment;
import org.pentaho.di.core.database.DatabaseMeta;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.sql.*;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author kimi
 * @since 2020-02-20
 */
@Service
public class SysAssembleDbServiceImpl extends ServiceImpl<SysAssembleDbMapper, SysAssembleDb> implements ISysAssembleDbService {

    @Autowired
    ISysAssembleDbdriverService dbdriverService;

    public Connection getConnection(String parentId) {
        SysAssembleDb assemble = this.selectById(parentId);
        if(assemble == null){
            return null;
        }

        Connection connection  = null;
        try {
            SysAssembleDbdriver sysAssembleDbdriver = dbdriverService.selectOne(new EntityWrapper<SysAssembleDbdriver>().eq(Constant.TYPE, assemble.getDatasourceType()));
            if (sysAssembleDbdriver != null) {
                String driver = sysAssembleDbdriver.getDriver();
                Class.forName(driver).newInstance();
            }

//            Boolean bigdata = assemble.getBigdata();
//            if (bigdata) {
//                //HBASE
//            }else  {
//                dataMetaOutput = new DatabaseMeta("Output", unBigDataDataSourceInfo.getDbType(), "Native", unBigDataDataSourceInfo.getDbHostName(), unBigDataDataSourceInfo.getDbName(), unBigDataDataSourceInfo.getDbPort(),
//                        unBigDataDataSourceInfo.getUsername(), unBigDataDataSourceInfo.getPassword());
//            }

            connection = DriverManager.getConnection(assemble.getDatasourceUrl(), assemble.getDatasourceUser(), assemble.getDatasourcePass());
            return connection;
        }  catch (Exception e) {
                e.printStackTrace();
                return null;
            }

    }

    @Override
    public List<String> getFieldsByTableName(String parentId, String tableName) {
        SysAssembleDb assemble = this.selectById(parentId);
        if(assemble == null){
            return null;
        }

        Connection connection = null;
        try {
            connection = getConnection(parentId);
            SysAssembleDbdriver sysAssembleDbdriver = dbdriverService.selectOne(new EntityWrapper<SysAssembleDbdriver>().eq(Constant.TYPE, assemble.getDatasourceType()));
            String fieldSql = "";
            if(sysAssembleDbdriver != null) {
                String firstTemplate = sysAssembleDbdriver.getFirstTemplate();
                fieldSql = MessageFormat.format(firstTemplate, MessageFormat.format(Constant.selectFieldSqlMysqlTemplate, tableName));
            }else {
                fieldSql =  MessageFormat.format(Constant.selectFieldSqlMysqlTemplate, tableName);
            }
            PreparedStatement preparedStatement = connection.prepareStatement(fieldSql);
            ResultSet resultSet = preparedStatement.executeQuery();
            ResultSetMetaData metaData = resultSet.getMetaData();
            int columnCount = metaData.getColumnCount();
            ArrayList<String> columList = new ArrayList<>();
            for (int i = 1; i <= columnCount; i++) {
                String columnLabel = metaData.getColumnLabel(i);
                columList.add(columnLabel);
            }
            return columList;
        }catch (Exception e) {
            e.printStackTrace();
            return null;
        }finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }

    }

    @Override
    public boolean testConnection(String parentId) {
        Connection connection = null;
        try{
            connection = getConnection(parentId);
            if (connection != null) {
                    return true;
            }
            return false;
        }
        catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }

    }

    @Override
    public boolean testSql(String parentId, String sql) {
        Connection connection = null;
        if (StringUtils.isEmpty(sql)) {
            return false;
        }
        try {

            connection = getConnection(parentId);
            if (connection == null) {
                return false;
            }

            PreparedStatement preparedStatement = connection.prepareStatement(sql);
            preparedStatement.executeQuery();

            return true;

        }catch (Exception e) {
            e.printStackTrace();
            return  false;
        }
        finally {
            if (connection != null){
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                    return false;
                }
            }
        }
    }

    @Override
    public List<String> getFieldsBySql(String parentId, String sql) {
        Connection connection = null;
        if (StringUtils.isEmpty(sql)) {
            return null;
        }
        try {

            connection = getConnection(parentId);
            if (connection == null) {
                return null;
            }
            SysAssembleDb assemble = this.selectById(parentId);
            SysAssembleDbdriver dbdriver = dbdriverService.selectOne(new EntityWrapper<SysAssembleDbdriver>().eq(Constant.TYPE, assemble.getDatasourceType()));
            String firstTemplate = dbdriver.getFirstTemplate();
            if (!StringUtils.isEmpty(firstTemplate)) {
                //有sql模板的 可以只取第一条
                sql = MessageFormat.format(firstTemplate, sql);
            }
            PreparedStatement preparedStatement = connection.prepareStatement(sql);
            ResultSet resultSet = preparedStatement.executeQuery();
            ResultSetMetaData metaData = resultSet.getMetaData();
            int columnCount = metaData.getColumnCount();
            ArrayList<String> columList = new ArrayList<>();
            for (int i = 1; i <= columnCount; i++) {
                String columnLabel = metaData.getColumnLabel(i);
                columList.add(columnLabel);
            }
            return columList;

        }catch (Exception e) {
            e.printStackTrace();
            return  null;
        }
        finally {
            if (connection != null){
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }


    }
}