package com.bruce.sams.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.bruce.sams.domain.ams.Comment;
import com.bruce.sams.mapper.CommentMapper;
import com.bruce.sams.service.CommentService;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.List;

/**
 * 活动评论服务实现类
 * @author bruce
 * @description 针对表【ams_comment(活动评论表)】的数据库操作Service实现
 * @createDate 2025-02-20 15:08:30
 */
@Service
public class CommentServiceImpl extends ServiceImpl<CommentMapper, Comment> implements CommentService {

    /**
     * 用户发表评论
     * @param userId 用户ID
     * @param actId 活动ID
     * @param content 评论内容
     * @param parentCommentId 父评论ID（如果是回复）
     */
    @Override
    public void addComment(Long userId, Long actId, String content, Long parentCommentId) {
        Comment comment = new Comment();
        comment.setUserId(userId);
        comment.setActId(actId);
        comment.setContent(content);
        comment.setParentCommentId(parentCommentId);
        comment.setCreatedAt(new Date(System.currentTimeMillis()));

        this.save(comment);
    }

    /**
     * 删除评论
     * @param commentId 评论ID
     * @param userId 用户ID（用于权限判断）
     * @param isAdmin 是否为管理员操作
     */
    @Override
    public void deleteComment(Long commentId, Long userId, boolean isAdmin) {
        Comment comment = this.getById(commentId);
        if (comment != null) {
            if (isAdmin || comment.getUserId().equals(userId)) {
                this.removeById(commentId);
            } else {
                throw new RuntimeException("无权限删除该评论");
            }
        }
    }

    /**
     * 获取活动的所有评论
     * @param actId 活动ID
     * @return 评论列表
     */
    @Override
    public List<Comment> getCommentsForActivity(Long actId) {
        LambdaQueryWrapper<Comment> query = new LambdaQueryWrapper<>();
        query.eq(Comment::getActId, actId).isNull(Comment::getParentCommentId);
        return this.list(query);
    }

    /**
     * 获取某条评论的所有回复
     * @param parentCommentId 父评论ID
     * @return 回复列表
     */
    @Override
    public List<Comment> getRepliesForComment(Long parentCommentId) {
        LambdaQueryWrapper<Comment> query = new LambdaQueryWrapper<>();
        query.eq(Comment::getParentCommentId, parentCommentId);
        return this.list(query);
    }
}