package com.xydl.service.impl;


import com.fasterxml.jackson.core.JsonProcessingException;
import com.xydl.mapper.OperationDB;
import com.xydl.util.DataSourceUtils;
import com.xydl.util.FormatUtil;
import com.xydl.util.MqttUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.Date;
import com.fasterxml.jackson.databind.ObjectMapper;


@Service
public class MqttServiceImpl {
    private  static final Logger logger = LoggerFactory.getLogger(MqttServiceImpl.class);

    @Autowired
    OperationDB operationDBMapper;

    private  static final String SYNC_TABLE = "sync_tables_info";


    public List<String> getAllTableNameFromSyncTable() {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        List<String> tableNames = new ArrayList<>();
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "select table_name from sync_tables_info";
            pstmt = conn.prepareStatement(sql);
            rs = pstmt.executeQuery();

            while(rs.next()){
                tableNames.add(rs.getString("table_name"));
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

        return tableNames;
    }

    public boolean tableNameIfExitsSyncRec(String tableName) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "select devid_val from sync_records where table_name = ?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, tableName);
            rs = pstmt.executeQuery();

            if(rs.next()){
                return true;
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

        return false;
    }

    public Map<String,String> getFieldMap(String tableName) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        Map<String,String> fieldsMap = new HashMap<>();
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "select sync_fields_info.field_name, sync_fields_info.dest_field_name " +
                    "from sync_fields_info,sync_tables_info " +
                    "where sync_fields_info.client_id = 10 and sync_fields_info.table_name = sync_tables_info.table_name and sync_tables_info.table_name=?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, tableName);
            rs = pstmt.executeQuery();
            ResultSetMetaData metaData = rs.getMetaData();

            while(rs.next()){
                fieldsMap.put(rs.getString("field_name"),rs.getString("dest_field_name"));
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

            return fieldsMap;
    }


    public Map<String,Object> getDeviceIDAndtime(String tableName) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        String sqlExecuting = null ;
        Map<String,Object> devIDTimeMap = new HashMap<>();
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "select devid_val,field_val2 from sync_records where table_name =?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, tableName);
            rs = pstmt.executeQuery();
            while(rs.next()){
                devIDTimeMap.put(rs.getString("devid_val"),rs.getString("field_val2"));
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

        return  devIDTimeMap;
    }

    public String getSQL(String tableName) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        String sqlExecuting = null ;
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "select * from sync_tables_info where table_name =?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, tableName);
            rs = pstmt.executeQuery();
            if(rs.next()){
                sqlExecuting = rs.getString("sql");
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

        return  sqlExecuting;
    }



    public List<Map<String,Object>> getData(String sqlExecuting, String deviceId, String time) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        List<Map<String,Object>> records = new ArrayList<>();
        try {
            conn = DataSourceUtils.getConnection();
            String sql = sqlExecuting;
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, deviceId);
            pstmt.setString(2, time);
            rs = pstmt.executeQuery();
            int columnCount = rs.getMetaData().getColumnCount(); //获取列的数量
            while(rs.next()){
                Map<String,Object> record = new HashMap<>();
                for (int col = 0; col < columnCount; col++) {
                    String columnName = rs.getMetaData().getColumnName(col + 1);
                    Object columnValue = rs.getString(columnName);
                    record.put(columnName,columnValue);
                }
                records.add(record);
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

        return  records;
    }

    public void addEarliestTime2SyncRecord(String tableName, String devId, String lastTime) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "insert into sync_records (client_id,table_name,devid_val,field_val2) values (?,?,?,?)";
            pstmt = conn.prepareStatement(sql);
            pstmt.setInt(1, 10);
            pstmt.setString(2, tableName);
            pstmt.setString(3, devId);
            pstmt.setString(4, lastTime);
            pstmt.executeUpdate();
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

    }

    public List<String> getAllDevId(String tableName) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        String sqlExecuting = null ;
        List<String> devIDs = new ArrayList<>();
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "select distinct eqmid from ?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, tableName);
            rs = pstmt.executeQuery();
            while(rs.next()){
                devIDs.add(rs.getString("eqmid"));
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

        return  devIDs;
    }

    public String getLastTime(String tableName, String devId) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "select d_time from ? where eqmid=? ORDER BY d_time asc limit 1";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, tableName);
            pstmt.setString(2, devId);
            rs = pstmt.executeQuery();
            if(rs.next()){
                return rs.getString("d_time");
            }
        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }

        return  null;
    }


    public boolean updateSyncRecordsTable(String tableName, String deviceID, String time) {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet rs = null;
        try {
            conn = DataSourceUtils.getConnection();
            String sql = "update sync_records set field_val2 = ? where table_name = ? and devid_val = ?";
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, time);
            pstmt.setString(2, tableName);
            pstmt.setString(3, deviceID);
            pstmt.executeUpdate();

        } catch (SQLException e) {
            logger.error("execute sql exception:", e);
            return false;
        } finally {
            DataSourceUtils.closeResource(rs, pstmt, conn);
        }
        return  true;
    }

    @Scheduled(initialDelay=1000, fixedRate = 1000 * 3600) //通过@Scheduled声明该方法是计划任务，使用fixedRate属性每隔固定时间执行
    public void reportRecord(){
        logger.info("开始执行");
        List<String> allTableNames = getAllTableNameFromSyncTable();
        for(String tableName : allTableNames){

            Map<String,String> fieldMap = getFieldMap(tableName);
            String sqlExecuting = getSQL(tableName);

            Map<String,Object> devIDLastTimeMap = getDeviceIDAndtime(tableName);
            for(String deviceID : devIDLastTimeMap.keySet()){
                List<Map<String,Object>> dataOfoneDeviceID = getData(sqlExecuting,deviceID, (String) devIDLastTimeMap.get(deviceID));
                String jsonStringData = FormatUtil.mqttFormatTransform(dataOfoneDeviceID,fieldMap);
                logger.info("表{}设备{}推送数据：{}",tableName,deviceID,jsonStringData);
                if(MqttUtil.publish2MQTT(jsonStringData)){
                    updateSyncRecordsTable(tableName,deviceID, (String) devIDLastTimeMap.get(deviceID));
                    logger.info("推送成功");
                }else{
                    logger.info("消息推送失败");
                }
            }
        }
    }


    @Scheduled(fixedDelay = Long.MAX_VALUE) // 用一个非常大的延迟值，确保只执行一次
    public void subScribeSamle() {
        logger.info("开始订阅===subScribe执行一次==={}",new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
        MqttUtil.subScribeMQTT();
    }

    @Scheduled(fixedRate = 1000 * 3600) //通过@Scheduled声明该方法是计划任务，使用fixedRate属性每隔固定时间执行
    public void checkDevIdTimer() {
        logger.info("每小时检测一次同步的表是否在‘同步记录表’");
        List<String> allTableNames = getAllTableNameFromSyncTable();
        for(String tableName : allTableNames){
            if(!tableNameIfExitsSyncRec(tableName)){
                logger.info("有不存在的表,把所有的devId及最早的时间更新到'同步记录表'");
                List<String> devIds = operationDBMapper.getAllDevId(tableName);
                for(String devId : devIds){
                    String lastTime = operationDBMapper.getLastTime(tableName,devId);
                    addEarliestTime2SyncRecord(tableName,devId,lastTime);
                }
            }
        }
    }
    


}