/*
 * Copyright [2020-2030] [https://www.stylefeng.cn]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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 * Guns采用APACHE LICENSE 2.0开源协议，您在使用过程中，需要注意以下几点：
 *
 * 1.请不要删除和修改根目录下的LICENSE文件。
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package cn.stylefeng.roses.kernel.db.mp.dboperator;

import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.StrUtil;
import cn.stylefeng.roses.kernel.db.api.DbOperatorApi;
import cn.stylefeng.roses.kernel.db.api.pojo.druid.DruidProperties;
import cn.stylefeng.roses.kernel.rule.enums.DbTypeEnum;
import cn.stylefeng.roses.kernel.rule.util.DatabaseTypeUtil;
import com.baomidou.mybatisplus.extension.toolkit.SqlRunner;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * 数据库操作的实现
 *
 * @author fengshuonan
 * @since 2020/11/4 14:48
 */
@Service
public class DbOperatorImpl implements DbOperatorApi {

    @Resource
    private DruidProperties druidProperties;

    @Override
    public DbTypeEnum getCurrentDbType() {
        return DatabaseTypeUtil.getDbType(druidProperties.getUrl());
    }

    @Override
    public int selectCount(String sql, Object... args) {
        long selectCount = SqlRunner.db().selectCount(sql, args);
        return Convert.toInt(selectCount);
    }

    @Override
    public Set<Long> findSubListByParentId(String tableName, String parentIdsFieldName, String keyFieldName, Long keyFieldValue) {

        // 组装sql
        String sqlTemplate = "select {} from {} where {} like '%[{}]%'";
        String sql = StrUtil.format(sqlTemplate, keyFieldName, tableName, parentIdsFieldName, keyFieldValue.toString());

        // 查询所有子级的id集合，结果不包含被查询的keyFieldValue
        List<Object> subIds = SqlRunner.db().selectObjs(sql);

        // 转为Set<Long>
        return subIds.stream().map(i -> Long.valueOf(i.toString())).collect(Collectors.toSet());
    }

    @Override
    public Long getMaxSortByTableName(String tableName, String fieldName) {

        String tempFieldName = "maxSort";

        String sqlTemplate = "select max({}) as {} from {}";
        String sql = StrUtil.format(sqlTemplate, fieldName, tempFieldName, tableName);

        Map<String, Object> oneResult = SqlRunner.db().selectOne(sql);

        // 查询不到，直接返回最大值-100
        if (oneResult == null) {
            return -100L;
        }

        Object maxSort = oneResult.get(tempFieldName);

        return Convert.toLong(maxSort);
    }

}
