import Link from "next/link";
import { Pin } from "lucide-react";
import type { PostListItem } from "@/lib/api";
import Avatar from "./Avatar";
import { IconComment, IconEye } from "./Icons";

function formatTime(dateStr: string) {
  const d = new Date(dateStr);
  return `${d.getFullYear()}.${String(d.getMonth() + 1).padStart(2, "0")}.${String(
    d.getDate()
  ).padStart(2, "0")}`;
}

/**
 * 管理员置顶区：独立于普通帖子列表。
 * 陶土色语义（与 badge-pin 一致），紧凑排列，一眼识别为公告性质内容。
 */
export default function PinnedPosts({
  posts,
  showBoard = true,
}: {
  posts: PostListItem[];
  showBoard?: boolean;
}) {
  if (posts.length === 0) return null;

  return (
    <section className="mb-6" aria-label="置顶讨论">
      <div className="flex items-center gap-2 mb-2.5 px-1">
        <span
          className="w-6 h-6 rounded-full flex items-center justify-center"
          style={{ background: "var(--clay-soft)", color: "var(--clay)" }}
        >
          <Pin size={12} fill="currentColor" strokeWidth={2.4} />
        </span>
        <h2 className="text-[13.5px] font-extrabold tracking-wide" style={{ color: "var(--clay)" }}>
          置顶讨论
        </h2>
        <span className="meta text-xs">管理员置顶 · {posts.length}</span>
      </div>

      <div className="panel overflow-hidden">
        {posts.map((p, i) => (
          <Link
            key={p.id}
            href={`/post/${p.id}`}
            className="group flex items-center gap-3 sm:gap-3.5 px-4 sm:px-5 py-3.5 transition-colors hover:bg-[var(--panel-2)]"
            style={i > 0 ? { borderTop: "1px solid var(--line)" } : undefined}
          >
            <Avatar name={p.user.nickname || p.user.username} size={36} />
            <div className="flex-1 min-w-0">
              <h3
                className="text-[14.5px] font-bold leading-snug truncate transition-colors group-hover:text-[var(--accent)]"
                style={{ color: "var(--ink)" }}
              >
                {p.title}
              </h3>
              <div className="meta flex items-center gap-2 mt-1 text-xs min-w-0">
                <span className="truncate">{p.user.nickname}</span>
                <span aria-hidden>·</span>
                <span className="shrink-0">{formatTime(p.created_at)}</span>
                {showBoard && (
                  <>
                    <span aria-hidden>·</span>
                    <span className="truncate">{p.board.name}</span>
                  </>
                )}
                {p.recommended && <span className="badge-rec !text-[10.5px] !px-1.5 !py-0 shrink-0">推荐</span>}
              </div>
            </div>
            <div className="hidden sm:flex items-center gap-3 shrink-0 meta text-[12.5px]">
              <span className="inline-flex items-center gap-1.5" aria-label={`${p.comment_count} 条评论`}>
                <IconComment size={14} /> {p.comment_count}
              </span>
              <span className="inline-flex items-center gap-1.5" aria-label={`${p.view_count} 次浏览`}>
                <IconEye size={14} /> {p.view_count}
              </span>
            </div>
            <Pin
              size={13}
              className="shrink-0 hidden sm:block"
              style={{ color: "var(--clay)" }}
              fill="currentColor"
              strokeWidth={2.2}
            />
          </Link>
        ))}
      </div>
    </section>
  );
}