package com.emotion.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.emotion.entity.Message;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 消息Mapper接口
 *
 * @author emotion-museum
 * @date 2025-07-23
 */
@Mapper
public interface MessageMapper extends BaseMapper<Message> {

    /**
     * 根据用户ID和时间范围查询消息
     * 通过conversation表关联查询
     */
    @Select("SELECT m.* FROM message m " +
            "INNER JOIN conversation c ON m.conversation_id = c.id " +
            "WHERE c.user_id = #{userId} " +
            "AND m.create_time BETWEEN #{startTime} AND #{endTime} " +
            "AND m.is_deleted = 0 " +
            "ORDER BY m.create_time ASC")
    List<Message> getByUserIdAndTimeRange(@Param("userId") String userId,
                                         @Param("startTime") LocalDateTime startTime,
                                         @Param("endTime") LocalDateTime endTime);

    /**
     * 根据用户ID分页查询消息
     * 通过conversation表关联查询
     */
    @Select("SELECT m.* FROM message m " +
            "INNER JOIN conversation c ON m.conversation_id = c.id " +
            "WHERE c.user_id = #{userId} " +
            "AND m.is_deleted = 0 " +
            "ORDER BY m.create_time DESC " +
            "LIMIT #{offset}, #{size}")
    List<Message> getByUserIdWithPageList(@Param("userId") String userId,
                                         @Param("offset") Integer offset,
                                         @Param("size") Integer size);

    /**
     * 统计用户消息总数
     */
    @Select("SELECT COUNT(*) FROM message m " +
            "INNER JOIN conversation c ON m.conversation_id = c.id " +
            "WHERE c.user_id = #{userId} " +
            "AND m.is_deleted = 0")
    Long countByUserId(@Param("userId") String userId);

    /**
     * 根据用户ID和关键词搜索消息
     */
    @Select("SELECT m.* FROM message m " +
            "INNER JOIN conversation c ON m.conversation_id = c.id " +
            "WHERE c.user_id = #{userId} " +
            "AND m.content LIKE CONCAT('%', #{keyword}, '%') " +
            "AND m.is_deleted = 0 " +
            "ORDER BY m.create_time DESC " +
            "LIMIT #{limit}")
    List<Message> searchByUserIdAndKeyword(@Param("userId") String userId,
                                          @Param("keyword") String keyword,
                                          @Param("limit") Integer limit);
}