import { allow, deny } from "@/lib/policy/assert"
import { addNotification } from "@/lib/api/notifications"
import { useAuthStore } from "@/store/auth"
import { useCommentStore } from "@/store/comments"
import { usePostStore } from "@/store/posts"

export function listComments() {
  return useCommentStore.getState().comments
}

export function listCommentsByPost(postId: string) {
  return useCommentStore.getState().comments.filter((comment) => comment.postId === postId)
}

export function addComment(postId: string, content: string) {
  const user = useAuthStore.getState().user
  if (!user) {
    return deny("AUTH_REQUIRED", "请先登录")
  }

  const post = usePostStore.getState().posts.find((item) => item.id === postId)
  if (!post) {
    return deny("NOT_FOUND", "帖子不存在")
  }

  const comment = useCommentStore.getState().addComment(postId, user, content)
  if (!comment) {
    return deny("VALIDATION_FAILED", "评论内容不能为空")
  }

  usePostStore.getState().incrementCommentCount(postId)

  addNotification({
    type: "community",
    title: "帖子收到新评论",
    content: `《${post.title}》有新的评论`,
    link: `/post/${post.id}`,
  })

  return allow()
}

export function toggleCommentLike(commentId: string) {
  const user = useAuthStore.getState().user
  if (!user) {
    return deny("AUTH_REQUIRED", "请先登录")
  }

  const comment = useCommentStore.getState().comments.find((item) => item.id === commentId)
  if (!comment) {
    return deny("NOT_FOUND", "评论不存在")
  }

  useCommentStore.getState().toggleCommentLike(commentId)
  return allow()
}