import Link from "next/link";
import { ArrowLeft } from "lucide-react";
import type { PostListItem } from "@/lib/api";
import { formatRelative } from "@/lib/format";
import { normalizePostType, postTypeLabel, contentAccessLabel, typeStatusLabel } from "@/lib/postMeta";
import LikeButton from "./LikeButton";
import Avatar from "./Avatar";
import { IconComment, IconEye } from "./Icons";

/**
 * 帖子列表行（参考社区信息流样式）：
 * 大头像 + 加粗标题（徽章内联）+ 第二行「板块 · 作者 · 发布时间 ← 最后回复」+
 * 右侧评论数等统计垂直居中。用于首页/板块页/搜索结果。
 */
export default function PostRow({
  post,
  boardHref,
  index = 0,
  compact = false,
  showViews = true,
  showLike = true,
}: {
  post: PostListItem;
  index?: number;
  boardHref?: boolean;
  compact?: boolean;
  showViews?: boolean;
  showLike?: boolean;
}) {
  const lastReply = post.last_reply;
  const replied = lastReply && new Date(lastReply.created_at).getTime() > new Date(post.created_at).getTime() + 60_000;
  const pt = normalizePostType(post.post_type);
  const statusBadge = pt !== "discussion" ? typeStatusLabel(pt, post.type_status) : "";

  return (
    <div
      className={`group relative flex items-center px-4 sm:px-5 border-t transition-colors hover:bg-[var(--accent-soft)] focus-within:bg-[var(--accent-soft)] j13-fade-up ${
        compact ? "gap-2.5 sm:gap-3" : "gap-3.5 sm:gap-4"
      }`}
      style={{
        borderColor: "var(--line)",
        paddingTop: compact ? 11 : 18,
        paddingBottom: compact ? 11 : 18,
        animationDelay: `${Math.min(index, 9) * 35}ms`,
      }}
    >
      <Link
        href={`/u/${post.user.id}`}
        className="shrink-0 above-link"
        aria-label={post.user.nickname}
        tabIndex={-1}
      >
        <Avatar name={post.user.nickname || post.user.username} src={post.user.avatar || undefined} size={compact ? 38 : 46} />
      </Link>

      <div className="flex-1 min-w-0">
        <div className="flex items-center gap-2 min-w-0">
          {/* 仅置顶/推荐在标题左侧 */}
          {post.pinned > 0 && <span className="badge-pin shrink-0">置顶</span>}
          {post.recommended && <span className="badge-rec shrink-0">推荐</span>}
          <div className="min-w-0 flex items-center gap-2 flex-1 overflow-hidden">
            <Link
              href={`/post/${post.id}`}
              className="stretch-link min-w-0 shrink"
              aria-label={post.title}
            >
              <h3
                className={`font-bold leading-snug truncate transition-colors group-hover:text-[var(--accent)] ${
                  compact ? "text-[15px]" : "text-[16px] sm:text-[17px]"
                }`}
                style={{ color: "var(--ink)" }}
              >
                {post.title}
              </h3>
            </Link>
            {/* 其余徽章紧跟标题右侧 */}
            {post.status === "pending" && <span className="badge-pending shrink-0">待审</span>}
            {pt !== "discussion" && pt !== "question" && (
              <span className="badge-type shrink-0">{postTypeLabel(post.post_type)}</span>
            )}
            {statusBadge && (
              <span className="badge-access shrink-0">{statusBadge}</span>
            )}
            {post.content_access && post.content_access !== "public" && (
              <span className="badge-access shrink-0">{contentAccessLabel(post.content_access)}</span>
            )}
          </div>
        </div>
        <div
          className={`meta relative z-[2] flex items-center gap-x-2 gap-y-1 flex-wrap ${
            compact ? "mt-1 text-[12.5px]" : "mt-1.5 text-[13px]"
          }`}
        >
          {boardHref && (
            <Link href={`/board/${post.board.id}`} className="j13-board-tag">
              {post.board.name}
            </Link>
          )}
          <Link
            href={`/u/${post.user.id}`}
            className="font-semibold hover:text-[var(--accent)] transition-colors"
            style={{ color: "var(--ink-2)" }}
          >
            {post.user.nickname}
          </Link>
          <span aria-hidden>·</span>
          <span className="tabular-nums">{formatRelative(post.created_at)}</span>
          {replied && (
            <span className="inline-flex items-center gap-1 min-w-0">
              <ArrowLeft size={13} className="shrink-0" aria-hidden />
              <Link
                href={`/u/${lastReply!.user.id}`}
                className="font-medium hover:text-[var(--accent)] transition-colors truncate max-w-[8em]"
              >
                {lastReply!.user.nickname || lastReply!.user.username}
              </Link>
              <span className="tabular-nums shrink-0">{formatRelative(lastReply!.created_at)}</span>
            </span>
          )}
          {!replied && post.comment_count === 0 && (
            <span className="hidden sm:inline" aria-hidden>
              · 暂无回复
            </span>
          )}
        </div>
      </div>

      <div className="above-link flex items-center gap-3 sm:gap-4 shrink-0">
        <Link
          href={`/post/${post.id}`}
          tabIndex={-1}
          aria-label={`${post.comment_count} 条评论`}
          className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} items-center gap-1.5 meta tabular-nums text-[13.5px] hover:text-[var(--accent)] transition-colors`}
        >
          <IconComment size={17} />
          {post.comment_count}
        </Link>
        {showViews && (
          <span
            className="hidden md:inline-flex items-center gap-1.5 meta tabular-nums"
            aria-label={`${post.view_count} 次浏览`}
          >
            <IconEye size={15} />
            {post.view_count}
          </span>
        )}
        {showLike && (
          <LikeButton
            postId={String(post.id)}
            liked={post.liked}
            likeCount={post.like_count}
            variant="compact"
          />
        )}
      </div>
    </div>
  );
}