jiang13-bbs/frontend/components/home/WorkspaceNav.tsx

"use client";

import Link from "next/link";
import { useSearchParams } from "next/navigation";
import { PenSquare, Home } from "lucide-react";
import type { BoardWithCount, User } from "@/lib/api";

// 首页壳内板块切换：仅替换中栏帖子流，不离开工作台
function boardHref(id: number) {
  return `/?board=${id}`;
}

// 桌面左栏：发帖 CTA + 板块导航 + 登录态快捷入口
export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user: User | null }) {
  const params = useSearchParams();
  const activeBoard = Number(params.get("board")) || 0;
  const composeHref = user ? "/compose" : "/login?redirect=/compose";

  return (
    <nav className="hidden lg:block w-56 xl:w-60 shrink-0" aria-label="工作台导航">
      <div className="sticky top-24 space-y-5">
        <Link href={composeHref} className="btn btn-primary w-full justify-center">
          <PenSquare size={16} /> 发起讨论
        </Link>

        {/* 「全部讨论」是重置筛选的动作入口，与板块目录分区展示 */}
        <div className="space-y-0.5">
          <Link
            href="/"
            className="j13-raillink"
            aria-current={activeBoard === 0 ? "page" : undefined}
          >
            <Home size={16} className="shrink-0" />
            <span className="flex-1 truncate">全部讨论</span>
          </Link>
        </div>

        {/* 板块目录：发现型入口（介绍 + 讨论量），区别于帖子页面包屑的位置指引；
            点击不离开工作台，仅在中栏筛选该板块帖子流 */}
        <div>
          <p
            className="px-1 mb-2 flex items-center justify-between text-[11.5px] font-bold tracking-[0.08em] uppercase"
            style={{ color: "var(--ink-3)" }}
          >
            <span>板块目录</span>
            {boards.length > 0 && (
              <span className="tracking-normal font-semibold tabular-nums">{boards.length} 个</span>
            )}
          </p>
          <div className="space-y-2">
            {boards.map((b, i) => {
              const desc = b.description?.trim();
              return (
                <Link
                  key={b.id}
                  href={boardHref(b.id)}
                  className="j13-bcard"
                  aria-current={activeBoard === b.id ? "page" : undefined}
                  aria-label={`${b.name}板块，${b.post_count} 篇讨论`}
                >
                  <span
                    className={`av-${i % 8} j13-bcard-ico`}
                    aria-hidden="true"
                  >
                    {b.name.slice(0, 1)}
                  </span>
                  <span className="min-w-0 flex-1">
                    <span className="flex items-center justify-between gap-2">
                      <span
                        className="truncate text-[13px] font-bold"
                        style={{ color: "var(--ink)" }}
                      >
                        {b.name}
                      </span>
                      <span className="meta shrink-0 text-[11px] tabular-nums">
                        {b.post_count} 篇
                      </span>
                    </span>
                    {desc && <span className="j13-bcard-desc">{desc}</span>}
                  </span>
                </Link>
              );
            })}
          </div>
        </div>
      </div>
    </nav>
  );
}

// 移动端：发帖入口 + 横向滑动板块条
export function WorkspaceNavMobile({
  boards,
  user,
}: {
  boards: BoardWithCount[];
  user: User | null;
}) {
  const params = useSearchParams();
  const activeBoard = Number(params.get("board")) || 0;
  const composeHref = user ? "/compose" : "/login?redirect=/compose";

  return (
    <div className="lg:hidden -mx-4 sm:-mx-6 px-4 sm:px-6">
      <div className="j13-chips">
        <Link href={composeHref} className="btn btn-primary btn-sm shrink-0">
          <PenSquare size={14} /> 发帖
        </Link>
        <Link
          href="/"
          className="j13-chip"
          aria-current={activeBoard === 0 ? "page" : undefined}
        >
          <Home size={13} /> 全部
        </Link>
        {boards.map((b) => (
          <Link
            key={b.id}
            href={boardHref(b.id)}
            className="j13-chip"
            aria-current={activeBoard === b.id ? "page" : undefined}
          >
            {b.name}
          </Link>
        ))}
      </div>
    </div>
  );
}