/**
 * Copyright (c) 2018-2028, Chill Zhuang 庄骞 (smallchill@163.com).
 * <p>
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE 3.0;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * 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
 * limitations under the License.
 */
package org.springblade.core.mp.support;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.springblade.core.tool.utils.Func;
import org.springblade.core.tool.utils.StringPool;
import org.springblade.core.tool.utils.StringUtil;

import java.util.Map;

/**
 * 定义常用的 sql关键字
 *
 * @author Chill
 */
public class SqlKeyword {
	private final static String SQL_REGEX = "'|%|--|insert|delete|select|count|group|union|drop|truncate|alter|grant|execute|exec|xp_cmdshell|call|declare|sql";

	private static final String EQUAL = "_equal";
	private static final String NOT_EQUAL = "_notequal";
	private static final String LIKE = "_like";
	private static final String NOT_LIKE = "_notlike";
	private static final String GT = "_gt";
	private static final String LT = "_lt";
	private static final String DATE_GT = "_dategt";
	private static final String DATE_EQUAL = "_dateequal";
	private static final String DATE_LT = "_datelt";
	private static final String IS_NULL = "_null";
	private static final String NOT_NULL = "_notnull";
	private static final String IGNORE = "_ignore";

	/**
	 * 条件构造器
	 *
	 * @param query 查询字段
	 * @param qw    查询包装类
	 */
	public static void buildCondition(Map<String, Object> query, QueryWrapper<?> qw) {
		if (Func.isEmpty(query)) {
			return;
		}
		query.forEach((k, v) -> {
			if (Func.hasEmpty(k, v) || k.endsWith(IGNORE)) {
				return;
			}
			if (k.endsWith(EQUAL)) {
				qw.eq(getColumn(k, EQUAL), v);
			} else if (k.endsWith(NOT_EQUAL)) {
				qw.ne(getColumn(k, NOT_EQUAL), v);
			} else if (k.endsWith(NOT_LIKE)) {
				qw.notLike(getColumn(k, NOT_LIKE), v);
			} else if (k.endsWith(GT)) {
				qw.gt(getColumn(k, GT), v);
			} else if (k.endsWith(LT)) {
				qw.lt(getColumn(k, LT), v);
			} else if (k.endsWith(DATE_GT)) {
				qw.gt(getColumn(k, DATE_GT), v);
			} else if (k.endsWith(DATE_EQUAL)) {
				qw.eq(getColumn(k, DATE_EQUAL), v);
			} else if (k.endsWith(DATE_LT)) {
				qw.lt(getColumn(k, DATE_LT), v);
			} else if (k.endsWith(IS_NULL)) {
				qw.isNull(getColumn(k, IS_NULL));
			} else if (k.endsWith(NOT_NULL)) {
				qw.isNotNull(getColumn(k, NOT_NULL));
			} else {
				qw.like(getColumn(k, LIKE), v);
			}
		});
	}

	/**
	 * 获取数据库字段
	 *
	 * @param column  字段名
	 * @param keyword 关键字
	 * @return String
	 */
	private static String getColumn(String column, String keyword) {
		return StringUtil.humpToUnderline(StringUtil.removeSuffix(column, keyword));
	}

	/**
	 * 把SQL关键字替换为空字符串
	 *
	 * @param param 关键字
	 * @return string
	 */
	public static String filter(String param) {
		if (param == null) {
			return null;
		}
		return param.replaceAll("(?i)" + SQL_REGEX, StringPool.EMPTY);
	}

}