Einklappbare Sidebar

import { useEffect, useState } from "react";
import { AnimatePresence, motion } from "framer-motion";
import { Box, CircleCheck, CircleDashed, CircleDot, Inbox, Layers, PanelLeft } from "lucide-react";
import type { LucideIcon } from "lucide-react";

const SIDEBAR_NAV: { label: string; icon: LucideIcon; badge?: number }[] = [
  { label: "Eingang", icon: Inbox, badge: 3 },
  { label: "Meine Aufgaben", icon: CircleDot },
  { label: "Projekte", icon: Box },
  { label: "Ansichten", icon: Layers },
];

const SIDEBAR_TEAMS = [
  { label: "Design", color: "#f2994a" },
  { label: "Engineering", color: "#26b5ce" },
];

const SIDEBAR_ISSUES = [
  { id: "AIM-142", title: "Onboarding prüfen", status: "progress" },
  { id: "AIM-139", title: "Neues App-Symbol", status: "todo" },
  { id: "AIM-131", title: "Zahlungen auf v2 migrieren", status: "done" },
  { id: "AIM-128", title: "Dunkelmodus in den Einstellungen", status: "progress" },
  { id: "AIM-120", title: "Farb-Tokens aufräumen", status: "todo" },
  { id: "AIM-117", title: "Tastaturkurzbefehle", status: "done" },
];

const SIDEBAR_SPRING = { type: "spring", stiffness: 420, damping: 38 } as const;

interface SidebarItemProps {
  label: string;
  icon?: LucideIcon;
  dot?: string;
  badge?: number;
  active: boolean;
  collapsed: boolean;
  accent: string;
  onSelect: () => void;
}

function SidebarItem({
  label,
  icon: Icon,
  dot,
  badge,
  active,
  collapsed,
  accent,
  onSelect,
}: SidebarItemProps) {
  const [tip, setTip] = useState(false);
  return (
    <div
      className="relative"
      onPointerEnter={() => setTip(true)}
      onPointerLeave={() => setTip(false)}
    >
      <button
        type="button"
        onClick={onSelect}
        onFocus={() => setTip(true)}
        onBlur={() => setTip(false)}
        aria-label={collapsed ? label : undefined}
        aria-current={active ? "page" : undefined}
        className={
          "relative flex h-8 w-full items-center gap-2.5 rounded-lg px-2.5 text-[13px] outline-none transition-colors duration-150 focus-visible:ring-2 focus-visible:ring-black/15 active:scale-[0.98] dark:focus-visible:ring-white/20 " +
          (active
            ? "font-medium text-[#1d1d1f] dark:text-[#f5f5f7]"
            : "text-[#5f5f66] hover:bg-black/[0.04] hover:text-[#1d1d1f] dark:text-[#a1a1aa] dark:hover:bg-white/[0.05] dark:hover:text-[#f5f5f7]")
        }
      >
        {active && (
          <motion.span
            layoutId="linear-sidebar-active"
            className="absolute inset-0 rounded-lg bg-white shadow-[0_1px_2px_rgba(0,0,0,0.06),0_0_0_1px_rgba(0,0,0,0.04)] dark:bg-white/[0.08] dark:shadow-none"
            transition={SIDEBAR_SPRING}
          />
        )}
        {Icon ? (
          <Icon
            className="relative h-4 w-4 shrink-0"
            strokeWidth={1.5}
            style={{ color: active ? accent : undefined }}
          />
        ) : (
          <span
            className="relative mx-[3px] h-2.5 w-2.5 shrink-0 rounded-[3px]"
            style={{ backgroundColor: dot }}
          />
        )}
        <motion.span
          initial={false}
          animate={{ opacity: collapsed ? 0 : 1 }}
          transition={{ duration: 0.15 }}
          className="relative flex-1 truncate whitespace-nowrap text-left"
        >
          {label}
        </motion.span>
        {badge ? (
          <>
            <motion.span
              initial={false}
              animate={{ opacity: collapsed ? 0 : 1, scale: collapsed ? 0.5 : 1 }}
              transition={SIDEBAR_SPRING}
              className="relative grid h-[18px] min-w-[18px] place-items-center rounded-full px-1 text-[10px] font-semibold tabular-nums text-white"
              style={{ backgroundColor: accent }}
            >
              {badge}
            </motion.span>
            <motion.span
              aria-hidden
              initial={false}
              animate={{ opacity: collapsed ? 1 : 0, scale: collapsed ? 1 : 0 }}
              transition={SIDEBAR_SPRING}
              className="absolute left-[23px] top-[5px] h-2 w-2 rounded-full ring-2 ring-[#f4f4f5] dark:ring-[#0e0e10]"
              style={{ backgroundColor: accent }}
            />
          </>
        ) : null}
      </button>
      <AnimatePresence>
        {collapsed && tip && (
          <motion.span
            role="tooltip"
            initial={{ opacity: 0, x: -4, y: "-50%", scale: 0.96 }}
            animate={{ opacity: 1, x: 0, y: "-50%", scale: 1 }}
            exit={{ opacity: 0, x: -4, y: "-50%", scale: 0.96 }}
            transition={{ type: "spring", stiffness: 600, damping: 36 }}
            className="pointer-events-none absolute left-full top-1/2 z-30 ml-3 flex items-center gap-1.5 whitespace-nowrap rounded-lg bg-[#1d1d1f] px-2.5 py-1.5 text-[12px] font-medium text-white shadow-[0_8px_24px_rgba(0,0,0,0.18)] dark:bg-[#f5f5f7] dark:text-[#1d1d1f]"
          >
            {label}
            {badge ? <span className="opacity-50">{badge}</span> : null}
          </motion.span>
        )}
      </AnimatePresence>
    </div>
  );
}

function IssueStatus({ status, accent }: { status: string; accent: string }) {
  if (status === "done")
    return <CircleCheck className="h-4 w-4 shrink-0" strokeWidth={1.5} style={{ color: accent }} />;
  if (status === "progress")
    return <CircleDot className="h-4 w-4 shrink-0 text-[#e2a93b]" strokeWidth={1.5} />;
  return <CircleDashed className="h-4 w-4 shrink-0 text-[#aeaeb2]" strokeWidth={1.5} />;
}

interface LinearSidebarProps {
  accent?: string;
  startCollapsed?: boolean;
}

export default function LinearSidebar({
  accent = "#5e6ad2",
  startCollapsed = false,
}: LinearSidebarProps) {
  const [collapsed, setCollapsed] = useState(startCollapsed);
  const [active, setActive] = useState("Eingang");

  useEffect(() => setCollapsed(startCollapsed), [startCollapsed]);

  useEffect(() => {
    const onKey = (e: KeyboardEvent) => {
      const t = e.target as HTMLElement | null;
      if (t && (t.tagName === "INPUT" || t.tagName === "TEXTAREA" || t.isContentEditable)) return;
      if (e.key === "[") setCollapsed((c) => !c);
    };
    window.addEventListener("keydown", onKey);
    return () => window.removeEventListener("keydown", onKey);
  }, []);

  const all = [...SIDEBAR_NAV.map((n) => n.label), ...SIDEBAR_TEAMS.map((t) => t.label)];
  const offset = Math.max(0, all.indexOf(active)) % 3;
  const issues = SIDEBAR_ISSUES.slice(offset, offset + 4);

  return (
    <div className="flex h-full w-full overflow-hidden bg-[#f4f4f5] text-[#1d1d1f] dark:bg-[#0e0e10] dark:text-[#f5f5f7]">
      <motion.aside
        initial={false}
        animate={{ width: collapsed ? 52 : 172 }}
        transition={SIDEBAR_SPRING}
        className="relative z-10 flex h-full shrink-0 flex-col gap-0.5 p-2"
      >
        <div className="mb-3 flex h-9 items-center gap-2 overflow-hidden px-1.5">
          <span
            className="grid h-6 w-6 shrink-0 place-items-center rounded-[7px] text-[12px] font-semibold text-white shadow-[inset_0_1px_0_rgba(255,255,255,0.25)]"
            style={{ backgroundColor: accent }}
          >
            A
          </span>
          <motion.span
            initial={false}
            animate={{ opacity: collapsed ? 0 : 1 }}
            transition={{ duration: 0.15 }}
            className="whitespace-nowrap text-[13px] font-semibold tracking-[-0.01em]"
          >
            Aimran
          </motion.span>
        </div>

        <nav aria-label="Workspace" className="flex flex-col gap-0.5">
          {SIDEBAR_NAV.map((item) => (
            <SidebarItem
              key={item.label}
              label={item.label}
              icon={item.icon}
              {...(item.badge ? { badge: item.badge } : {})}
              active={active === item.label}
              collapsed={collapsed}
              accent={accent}
              onSelect={() => setActive(item.label)}
            />
          ))}
          <div className="relative mb-1 mt-4 h-4 px-2.5">
            <motion.p
              initial={false}
              animate={{ opacity: collapsed ? 0 : 1 }}
              className="whitespace-nowrap text-[11px] font-medium text-[#8e8e93]"
            >
              Teams
            </motion.p>
            <motion.div
              initial={false}
              animate={{ opacity: collapsed ? 1 : 0 }}
              className="absolute inset-x-2.5 top-2 h-px bg-black/[0.08] dark:bg-white/[0.08]"
            />
          </div>
          {SIDEBAR_TEAMS.map((team) => (
            <SidebarItem
              key={team.label}
              label={team.label}
              dot={team.color}
              active={active === team.label}
              collapsed={collapsed}
              accent={accent}
              onSelect={() => setActive(team.label)}
            />
          ))}
        </nav>

        <button
          type="button"
          onClick={() => setCollapsed((c) => !c)}
          aria-label={collapsed ? "Seitenleiste erweitern" : "Seitenleiste einklappen"}
          aria-expanded={!collapsed}
          className="mt-auto flex h-8 items-center gap-2.5 overflow-hidden rounded-lg px-2.5 text-[12px] text-[#8e8e93] outline-none transition-colors hover:bg-black/[0.04] hover:text-[#1d1d1f] focus-visible:ring-2 focus-visible:ring-black/15 dark:hover:bg-white/[0.05] dark:hover:text-[#f5f5f7] dark:focus-visible:ring-white/20"
        >
          <PanelLeft className="h-4 w-4 shrink-0" strokeWidth={1.5} />
          <motion.span
            initial={false}
            animate={{ opacity: collapsed ? 0 : 1 }}
            transition={{ duration: 0.15 }}
            className="flex flex-1 items-center justify-between whitespace-nowrap"
          >
            Einklappen
            <kbd className="rounded-[5px] border border-black/10 bg-white px-1.5 font-mono text-[10px] leading-4 dark:border-white/10 dark:bg-white/5">
              [
            </kbd>
          </motion.span>
        </button>
      </motion.aside>

      <main className="my-2 mr-2 flex min-w-0 flex-1 flex-col overflow-hidden rounded-xl bg-white shadow-[0_1px_2px_rgba(0,0,0,0.05),0_0_0_1px_rgba(0,0,0,0.04)] dark:bg-[#18181b] dark:shadow-[0_0_0_1px_rgba(255,255,255,0.06)]">
        <header className="flex h-11 shrink-0 items-center gap-2 border-b border-black/[0.06] px-4 text-[13px] font-medium dark:border-white/[0.06]">
          <span className="truncate">{active}</span>
          <span className="rounded-md bg-black/[0.05] px-1.5 text-[11px] tabular-nums text-[#8e8e93] dark:bg-white/10">
            {issues.length}
          </span>
        </header>
        <AnimatePresence mode="wait" initial={false}>
          <motion.ul
            key={active}
            initial={{ opacity: 0, y: 6 }}
            animate={{ opacity: 1, y: 0 }}
            exit={{ opacity: 0, y: -4 }}
            transition={{ duration: 0.18 }}
            className="flex-1 overflow-y-auto"
          >
            {issues.map((issue) => (
              <li
                key={issue.id}
                className="flex items-center gap-3 border-b border-black/[0.04] px-4 py-2.5 text-[13px] transition-colors hover:bg-black/[0.02] dark:border-white/[0.04] dark:hover:bg-white/[0.02]"
              >
                <IssueStatus status={issue.status} accent={accent} />
                <span className="truncate">{issue.title}</span>
              </li>
            ))}
          </motion.ul>
        </AnimatePresence>
      </main>
    </div>
  );
}