package com.vcarecity.cvs.service.impl;

import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import com.vcarecity.cvs.core.ColumnUpdateMapper;
import com.vcarecity.cvs.properties.AppProperties;
import com.vcarecity.cvs.service.ResultHandlerService;
import com.vcarecity.cvs.util.CreateDatasource;
import com.zaxxer.hikari.HikariDataSource;
import lombok.extern.slf4j.Slf4j;

import java.sql.Connection;
import java.sql.Date;
import java.sql.Statement;
import java.sql.Timestamp;
import java.util.List;

/**
 * @author Kerry on 19/11/21
 */


@Slf4j
public class MySQLResultStatHandlerServiceImpl implements ResultHandlerService {


    private final String sql;
    private final HikariDataSource dataSource;

    @Inject
    public MySQLResultStatHandlerServiceImpl(AppProperties properties, @Assisted Object sql) {
        this.sql = (String) sql;
        this.dataSource = CreateDatasource.createDataSource(properties.getToDb());
    }


    @Override
    public <T> void resultHandler(String table, String[] header, List<T> dataList) throws Exception {


        long startTime = System.currentTimeMillis();

        StringBuffer sb = new StringBuffer();

        final String[] newHeaders = ColumnUpdateMapper.updateColumnName(table, header);
        final String column = String.join(",", newHeaders);


        sb.append("INSERT INTO ").append(table).append("(").append(String.join(",", column)).append(") VALUES ");

        for (T t : dataList) {
            if (t.getClass().isArray()) {
                Object[] rows = (Object[]) t;
                sb.append("(");
                for (int i = 0; i < header.length; i++) {

                    Object row = rows[i];
                    if (row instanceof String) {
                        sb.append("'").append(row).append("'");
                    } else if (row instanceof Date) {
                        sb.append("'").append(row).append("'");
                    } else if (row instanceof Timestamp) {
                        sb.append("'").append(row).append("'");
                    } else {
                        sb.append(row);
                    }
                    if (i != header.length - 1) {
                        sb.append(",");
                    }
                }
                sb.append("),");
            }
        }
        final StringBuffer stringBuffer = sb.deleteCharAt(sb.length() - 1);

        // logger.debug("{}", stringBuffer.toString());

        final Connection connection = dataSource.getConnection();

        final Statement statement = connection.createStatement();
        statement.execute(stringBuffer.toString());
        statement.close();
        connection.close();

        logger.info("WRITE SUCCESS to mysql usage time {} /ms, size = {}", System.currentTimeMillis() - startTime, dataList.size());
    }


}