"use client";

/**
 * A post shared into a chat, rendered as a card with its author.
 *
 * The contents are resolved by the BFF on every read, per viewer — never from
 * a snapshot frozen at send time. So a post that has since been deleted or
 * hidden arrives as `entity_unavailable` and renders as a tombstone rather
 * than quietly showing content the reader is no longer allowed to see.
 */

import Link from "next/link";
import { ImageOff } from "lucide-react";
import { UserAvatar } from "@/components/ui/user-avatar";
import type { Attachment } from "@/lib/chat";

export function SharedPostCard({ attachment }: { attachment: Attachment }) {
  const post = attachment.entity;

  if (!post || attachment.entity_unavailable) {
    return (
      <div className="mt-1 flex items-center gap-2 rounded-lg border border-border bg-muted/30 px-3 py-2.5">
        <ImageOff className="size-4 shrink-0 text-muted-foreground" aria-hidden />
        <span className="text-sm text-muted-foreground">
          This post is no longer available
        </span>
      </div>
    );
  }

  return (
    <Link
      href={`/u/${encodeURIComponent(post.author_handle)}/posts#post-${post.id}`}
      className="mt-1 block overflow-hidden rounded-lg border border-border bg-card transition-colors hover:bg-muted/40"
    >
      <span className="flex items-center gap-2 px-3 py-2">
        <UserAvatar
          src={post.author_avatar_url ?? null}
          name={post.author_name}
          className="size-6 shrink-0"
        />
        <span className="min-w-0 flex-1">
          <span className="block truncate text-xs font-medium text-foreground">
            {post.author_name}
          </span>
          <span className="block truncate text-[11px] text-muted-foreground">
            @{post.author_handle}
          </span>
        </span>
      </span>

      {post.image_url && (
        // eslint-disable-next-line @next/next/no-img-element
        <img
          src={post.image_url}
          alt=""
          loading="lazy"
          className="aspect-square w-full object-cover"
        />
      )}

      {post.caption && (
        <span className="block px-3 py-2 text-sm leading-relaxed text-foreground line-clamp-3">
          {post.caption}
        </span>
      )}

      {post.source_title && (
        <span className="block truncate px-3 pb-2 text-xs text-muted-foreground">
          {post.source_title}
        </span>
      )}
    </Link>
  );
}