package com.imyeyu.spring.mapper;

import com.imyeyu.spring.util.SQLProvider;
import org.apache.ibatis.annotations.DeleteProvider;
import org.apache.ibatis.annotations.InsertProvider;
import org.apache.ibatis.annotations.Options;
import org.apache.ibatis.annotations.SelectProvider;
import org.apache.ibatis.annotations.UpdateProvider;

import java.util.List;
import java.util.Map;

/**
 * 基本 SQL 映射，子接口可以不实现
 *
 * @author 夜雨
 * @version 2021-07-16 09:40
 */
public interface BaseMapper<T, P> {

	/**
	 * 排序方式
	 *
	 * @author 夜雨
	 * @version 2023-09-05 22:14
	 */
	enum OrderType {

		ASC,

		DESC
	}

	static final String NOT_DELETE = " AND `deleted_at` IS NULL ";

	static final String LIMIT_1 = " LIMIT 1";

	static final String UNIX_TIME = " FLOOR(UNIX_TIMESTAMP(NOW(3)) * 1000) ";

	static final String PAGE = NOT_DELETE + " LIMIT #{offset}, #{limit}";

	/**
	 * 统计数据量
	 *
	 * @return 数据量
	 */
	@SelectProvider(type = SQLProvider.class, method = "count")
	long count();

	default List<T> list(long offset, int limit) {
		return listOrder(offset, limit, null);
	}

	/**
	 * 获取部分数据
	 *
	 * @param offset 偏移
	 * @param limit  数据量
	 * @return 数据列表
	 */
	@SelectProvider(type = SQLProvider.class, method = "listOrder")
	List<T> listOrder(long offset, int limit, Map<String, OrderType> orderMap);

	@SelectProvider(type = SQLProvider.class, method = "listAll")
	List<T> listAll();

	/**
	 * 创建数据。默认自增主键为 id，如需修改请重写此接口
	 *
	 * @param t 数据对象
	 */
	@InsertProvider(type = SQLProvider.class, method = "insert")
	@Options(useGeneratedKeys = true, keyProperty = "id")
	void insert(T t);

	/**
	 * 根据 ID 获取对象
	 *
	 * @param id 索引
	 * @return 数据对象
	 */
	@SelectProvider(type = SQLProvider.class, method = "select")
	T select(P id);

	@SelectProvider(type = SQLProvider.class, method = "selectByExample")
	T selectByExample(T t);

	@SelectProvider(type = SQLProvider.class, method = "selectAllByExample")
	List<T> selectAllByExample(T t);

	/**
	 * 修改数据
	 *
	 * @param t 数据对象
	 */
	@UpdateProvider(type = SQLProvider.class, method = "update")
	void update(T t);

	@UpdateProvider(type = SQLProvider.class, method = "updateSelective")
	void updateSelective(T t);

	/**
	 * 软删除
	 *
	 * @param id 索引
	 */
	@UpdateProvider(type = SQLProvider.class, method = "delete")
	void delete(P id);

	/**
	 * 销毁（物理删除）
	 *
	 * @param id 索引
	 */
	@DeleteProvider(type = SQLProvider.class, method = "destroy")
	void destroy(P id);
}