import type { SessionInfo } from "@umt/contracts";
import { Clapperboard, LoaderCircle, Menu, PanelLeftClose, PanelLeftOpen } from "lucide-react";
import { useCallback, useEffect, useLayoutEffect, useRef, useState } from "react";
import { Link, Outlet, useLocation, useMatches } from "react-router";
import { useSession } from "~/api/auth.ts";
import { AgentDrawer, AgentDrawerTrigger } from "~/components/agent/agent-drawer.tsx";
import { outletKey } from "~/components/agent/agent-store.ts";
import { AccountMenu } from "~/components/console/account-menu.tsx";
import { AgentLauncher, AgentNavEntry } from "~/components/console/agent-launcher.tsx";
import { ErrorState } from "~/components/console/empty-state.tsx";
import { InboxBell } from "~/components/console/inbox-bell.tsx";
import { findNavItem, NAV_GROUPS, type NavGroup, pageTitle } from "~/components/console/nav.ts";
import { LiquidSurface } from "~/components/liquid-surface.tsx";
import PrismLeak from "~/components/prism-leak.tsx";
import { CommandPalette } from "~/components/search/command-palette.tsx";
import { SearchTrigger } from "~/components/search/search-trigger.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 { redirectToLogin } from "~/lib/api.ts";
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 activeTo = findNavItem(location.pathname)?.to;
  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}
      <AgentNavEntry onNavigate={onNavigate} />
      {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) => {
              const active = item.to === activeTo;
              return (
                <Link
                  key={item.to}
                  to={item.to}
                  onClick={onNavigate}
                  aria-current={active ? "page" : undefined}
                  className={cn(
                    "flex w-full items-center gap-3 rounded-lg px-3 py-2 text-sm font-medium transition-colors duration-base",
                    active
                      ? "text-foreground"
                      : "text-muted-foreground hover:bg-foreground/[0.04] hover:text-foreground",
                  )}
                >
                  <item.icon className={cn("h-4 w-4 shrink-0", active && "text-primary")} />
                  <span className="flex-1 truncate">{item.label}</span>
                </Link>
              );
            })}
          </div>
        </div>
      ))}
    </nav>
  );
}

// ─── 折叠态:只显示图标,组间细线分隔 ───
function CollapsedNav() {
  const location = useLocation();
  const activeTo = findNavItem(location.pathname)?.to;
  return (
    <nav className="flex flex-1 flex-col items-center gap-1 overflow-y-auto py-4">
      <AgentNavEntry collapsed />
      {NAV_GROUPS.map((group, gi) => (
        <div key={group.title} className="flex flex-col items-center gap-1">
          {gi > 0 ? <span aria-hidden className="my-1 h-px w-6 bg-border" /> : null}
          {group.items.map((item) => {
            const active = item.to === activeTo;
            return (
              <Link
                key={item.to}
                to={item.to}
                title={item.label}
                aria-current={active ? "page" : undefined}
                className={cn(
                  "relative flex h-10 w-10 items-center justify-center rounded-xl transition-colors duration-micro",
                  active
                    ? "seg-thumb text-primary"
                    : "text-muted-foreground hover:bg-foreground/[0.04] hover:text-foreground",
                )}
              >
                <item.icon className="h-[18px] w-[18px]" />
              </Link>
            );
          })}
        </div>
      ))}
    </nav>
  );
}

function Brand({ className }: { className?: string }) {
  return (
    <Link to="/console" className={cn("flex items-center gap-2 transition-opacity hover:opacity-80", className)}>
      <span className="grid h-7 w-7 shrink-0 place-items-center rounded-lg pill-selected">
        <Clapperboard className="h-4 w-4" />
      </span>
      <p className="truncate text-xs font-bold tracking-wide text-foreground">UHD Media Tool</p>
    </Link>
  );
}

/** 会话探测:未登录跳登录页;探测中/失败给全屏占位 */
export default function ConsoleLayout() {
  const session = useSession();
  const unauthenticated = session.data && !session.data.authenticated;

  useEffect(() => {
    if (unauthenticated) redirectToLogin();
  }, [unauthenticated]);

  if (session.isError) {
    return (
      <div className="grid min-h-screen place-items-center bg-background px-4">
        <ErrorState title="读取登录状态失败" error={session.error} onRetry={() => session.refetch()} />
      </div>
    );
  }
  if (!session.data || unauthenticated) {
    return (
      <div className="grid min-h-screen place-items-center bg-background" role="status" aria-label="正在确认登录状态">
        <LoaderCircle className="h-5 w-5 animate-spin text-muted-foreground" />
      </div>
    );
  }
  return <ConsoleShell session={session.data} />;
}

function ConsoleShell({ session }: { session: SessionInfo }) {
  const location = useLocation();
  const [collapsed, setCollapsed] = useState(false);
  const [sheetOpen, setSheetOpen] = useState(false);
  const activeLabel = pageTitle(location.pathname) ?? PORTAL_NAME;
  // 路由 handle.layout === "wide"(文件管理):内容区不限最大宽度、不留外边距,页面自己排版
  const wide = useMatches().some((m) => (m.handle as { layout?: string } | undefined)?.layout === "wide");

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

      {/* 桌面端侧栏 */}
      {/* 侧栏贴边,不做浮起卡片;右边不画硬分隔线,由 pg-chrome-side 给内侧细亮边、外侧细暗线和淡投影 */}
      <aside
        className={cn(
          "pg-chrome pg-chrome-side fixed inset-y-0 left-0 z-30 hidden flex-col transition-all duration-layout select-none xl:flex",
          collapsed ? "w-[60px]" : "w-60",
        )}
      >
        {/* 标志行 + 折叠开关:展开时开关在名称右侧;收起后只剩标志,悬停换成展开图标,点一下展开 */}
        <div
          className={cn(
            "flex h-14 shrink-0 items-center border-b border-[var(--shell-border)] transition-all duration-layout",
            collapsed ? "justify-center px-0" : "gap-2 pr-2 pl-4",
          )}
        >
          {collapsed ? (
            <button
              type="button"
              onClick={() => setCollapsed(false)}
              title="展开侧边栏"
              aria-label="展开侧边栏"
              className="group/logo relative grid h-9 w-9 cursor-pointer place-items-center rounded-full transition-colors duration-base hover:bg-foreground/[0.06]"
            >
              <span className="grid h-7 w-7 place-items-center rounded-lg pill-selected transition-opacity duration-base group-hover/logo:opacity-0">
                <Clapperboard className="h-4 w-4" />
              </span>
              <PanelLeftOpen className="absolute h-[18px] w-[18px] text-muted-foreground opacity-0 transition-opacity duration-base group-hover/logo:opacity-100" />
            </button>
          ) : (
            <>
              <Brand className="min-w-0 flex-1" />
              <button
                type="button"
                onClick={() => setCollapsed(true)}
                title="收起侧边栏"
                aria-label="收起侧边栏"
                className="grid h-8 w-8 shrink-0 cursor-pointer place-items-center rounded-full text-muted-foreground transition-colors duration-base hover:bg-foreground/[0.06] hover:text-foreground"
              >
                <PanelLeftClose className="h-[18px] w-[18px]" />
              </button>
            </>
          )}
        </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",
        )}
      >
        {/* 顶栏不铺磨砂(磨砂栏会成为背景根,里面的玻璃糊不到页面):页面底色渐隐托住标题,
            右侧通知、智能体、日夜切换与账户收进一枚玻璃胶囊 */}
        <header className="sticky top-0 z-20 flex h-14 items-center bg-gradient-to-b from-background/90 via-background/60 to-transparent 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">
            <SearchTrigger />
            <LiquidSurface tier="regular" radius={20} noRefraction style={{ width: "auto", height: "auto" }}>
              <div className="flex items-center gap-0.5 p-1">
                <InboxBell bare />
                {/* 桌面有侧栏主入口与右下角悬浮按钮,顶栏的智能体按钮只在窄屏保留 */}
                <AgentDrawerTrigger className="xl:hidden" />
                <ThemeToggle bare />
                <AccountMenu session={session} bare />
              </div>
            </LiquidSurface>
          </div>
        </header>

        {/* 底部留出悬浮按钮的高度,页面末尾的内容能滚到它上面 */}
        <main className={cn("relative flex-1 overflow-x-clip", !wide && "px-4 pt-6 pb-24 md:px-6 md:pt-8")}>
          <div
            key={outletKey(location.pathname)}
            className={cn(!wide && "mx-auto max-w-6xl", "motion-safe:animate-blur-in")}
          >
            <Outlet />
          </div>
        </main>
        <AgentDrawer />
        <AgentLauncher />
        <CommandPalette />
      </div>
    </div>
  );
}