import { ChevronLeft, ChevronRight, Clapperboard, Menu } from "lucide-react";
import { useCallback, useEffect, useLayoutEffect, useRef, useState } from "react";
import { Link, NavLink, Outlet, useLocation } from "react-router";
import { ApiKeyDialog } from "~/components/console/api-key-dialog.tsx";
import { findNavItem, NAV_GROUPS, NAV_ITEMS, type NavGroup } from "~/components/console/nav.ts";
import PrismLeak from "~/components/prism-leak.tsx";
import { ThemeToggle } from "~/components/theme-toggle.tsx";
import { Button } from "~/components/ui/button.tsx";
import { Sheet, SheetContent, SheetHeader, SheetTitle, SheetTrigger } from "~/components/ui/sheet.tsx";
import { cn } from "~/lib/utils.ts";

const PORTAL_NAME = "媒体自动化";

// ─── 展开态导航:选中项由一枚玻璃滑块(seg-thumb)滑到激活链接背后 ───
function ExpandedNav({ groups, onNavigate }: { groups: NavGroup[]; onNavigate?: () => void }) {
  const location = useLocation();
  const navRef = useRef<HTMLElement>(null);
  const [pill, setPill] = useState<{ x: number; y: number; w: number; h: number } | null>(null);

  const measure = useCallback(() => {
    const nav = navRef.current;
    if (!nav) return;
    const active = nav.querySelector<HTMLElement>('[aria-current="page"]');
    if (!active) {
      setPill(null);
      return;
    }
    const navRect = nav.getBoundingClientRect();
    const rect = active.getBoundingClientRect();
    setPill({ x: rect.left - navRect.left, y: rect.top - navRect.top + nav.scrollTop, w: rect.width, h: rect.height });
  }, []);

  // biome-ignore lint/correctness/useExhaustiveDependencies: 路由变化时重新量测
  useLayoutEffect(() => {
    measure();
  }, [measure, location.pathname]);

  useEffect(() => {
    window.addEventListener("resize", measure);
    return () => window.removeEventListener("resize", measure);
  }, [measure]);

  return (
    <nav ref={navRef} className="relative flex-1 space-y-4 overflow-y-auto px-2.5 py-4">
      {pill ? (
        <span
          aria-hidden
          className="tab-slider seg-thumb pointer-events-none absolute top-0 left-0 -z-[1] rounded-lg"
          style={{ transform: `translate(${pill.x}px, ${pill.y}px)`, width: pill.w, height: pill.h }}
        />
      ) : null}
      {groups.map((group) => (
        <div key={group.title}>
          <p className="mb-1 px-2 text-micro font-semibold tracking-[0.15em] text-muted-foreground/75 uppercase">
            {group.title}
          </p>
          <div className="space-y-0.5">
            {group.items.map((item) => (
              <NavLink
                key={item.to}
                to={item.to}
                end={item.to === "/"}
                onClick={onNavigate}
                className={({ isActive }) =>
                  cn(
                    "flex w-full items-center gap-3 rounded-lg px-3 py-2 text-sm font-medium transition-colors duration-base",
                    isActive
                      ? "text-foreground"
                      : "text-muted-foreground hover:bg-foreground/[0.04] hover:text-foreground",
                  )
                }
              >
                {({ isActive }) => (
                  <>
                    <item.icon className={cn("h-4 w-4 shrink-0", isActive && "text-primary")} />
                    <span className="flex-1 truncate">{item.label}</span>
                  </>
                )}
              </NavLink>
            ))}
          </div>
        </div>
      ))}
    </nav>
  );
}

// ─── 折叠态:只显示图标 ───
function CollapsedNav() {
  return (
    <nav className="flex flex-1 flex-col items-center gap-1 overflow-y-auto py-4">
      {NAV_ITEMS.map((item) => (
        <NavLink
          key={item.to}
          to={item.to}
          end={item.to === "/"}
          title={item.label}
          className={({ isActive }) =>
            cn(
              "flex h-10 w-10 items-center justify-center rounded-xl transition-colors duration-micro",
              isActive
                ? "seg-thumb text-primary"
                : "text-muted-foreground hover:bg-foreground/[0.04] hover:text-foreground",
            )
          }
        >
          <item.icon className="h-[18px] w-[18px]" />
        </NavLink>
      ))}
    </nav>
  );
}

function Brand({ collapsed = false }: { collapsed?: boolean }) {
  return (
    <Link
      to="/"
      className={cn(
        "flex items-center transition-opacity hover:opacity-80",
        collapsed ? "w-full justify-center" : "gap-2",
      )}
    >
      <span className="grid h-7 w-7 place-items-center rounded-lg pill-selected">
        <Clapperboard className="h-4 w-4" />
      </span>
      {!collapsed && <p className="text-xs font-bold tracking-wide text-foreground">UHD Media Tool</p>}
    </Link>
  );
}

export default function ConsoleLayout() {
  const location = useLocation();
  const [collapsed, setCollapsed] = useState(false);
  const [sheetOpen, setSheetOpen] = useState(false);
  const activeLabel = findNavItem(location.pathname)?.label ?? PORTAL_NAME;

  return (
    <div className="app-scrollbars relative isolate flex min-h-screen overflow-x-hidden bg-background">
      <div className="pointer-events-none fixed inset-0 -z-10 bg-page-glow" />
      <PrismLeak className="-z-10" />

      {/* 桌面端侧栏 */}
      <aside
        className={cn(
          "pg-chrome pg-chrome-side fixed inset-y-0 left-0 z-30 hidden flex-col border-r transition-all duration-layout select-none xl:flex",
          collapsed ? "w-[60px]" : "w-60",
        )}
      >
        <button
          type="button"
          onClick={() => setCollapsed((v) => !v)}
          className="absolute top-3 -right-4 z-40 flex h-8 w-8 cursor-pointer items-center justify-center rounded-full border border-[var(--shell-border)] bg-background text-muted-foreground shadow-md transition-all duration-base hover:scale-110 hover:bg-foreground/[0.04] hover:text-foreground"
          title={collapsed ? "展开侧边栏" : "收起侧边栏"}
        >
          {collapsed ? <ChevronRight className="h-4 w-4" /> : <ChevronLeft className="h-4 w-4" />}
        </button>
        <div
          className={cn(
            "flex h-14 shrink-0 items-center border-b border-[var(--shell-border)]",
            collapsed ? "justify-center px-0" : "px-4",
          )}
        >
          <Brand collapsed={collapsed} />
        </div>
        {collapsed ? <CollapsedNav /> : <ExpandedNav groups={NAV_GROUPS} />}
      </aside>

      {/* 主内容区 */}
      <div
        className={cn(
          "relative flex min-h-screen min-w-0 flex-1 flex-col transition-all duration-layout",
          collapsed ? "xl:ml-[60px]" : "xl:ml-60",
        )}
      >
        <header className="pg-chrome sticky top-0 z-20 flex h-14 items-center border-b px-4 md:px-6">
          <div className="flex min-w-0 items-center gap-3">
            <Sheet open={sheetOpen} onOpenChange={setSheetOpen}>
              <SheetTrigger asChild>
                <Button variant="ghost" size="icon" className="h-8 w-8 xl:hidden" aria-label="打开导航">
                  <Menu className="h-4 w-4" />
                </Button>
              </SheetTrigger>
              <SheetContent side="left" className="w-64 p-0 select-none">
                <SheetHeader className="border-b border-[var(--shell-border)] px-5 py-4">
                  <SheetTitle className="text-sm">
                    <Brand />
                  </SheetTitle>
                </SheetHeader>
                <ExpandedNav groups={NAV_GROUPS} onNavigate={() => setSheetOpen(false)} />
              </SheetContent>
            </Sheet>
            <span className="truncate text-sm font-semibold text-foreground">{activeLabel}</span>
          </div>
          <div className="ml-auto flex items-center gap-2">
            <ApiKeyDialog />
            <ThemeToggle />
          </div>
        </header>

        <main className="relative flex-1 overflow-x-hidden px-4 py-6 md:px-6 md:py-8">
          <div key={location.pathname} className="mx-auto max-w-6xl motion-safe:animate-blur-in">
            <Outlet />
          </div>
        </main>
      </div>
    </div>
  );
}