import { BarChart3, Search } from "lucide-react"
import { useState } from "react"

import { Link, Outlet, useMatchRoute } from "@tanstack/react-router"

import { Avatar, AvatarFallback } from "@/shared/ui/avatar"
import { Button } from "@/shared/ui/button"
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
} from "@/shared/ui/dialog"
import { Input } from "@/shared/ui/input"
import {
  type NavigationItem,
  mobilePrimaryNavigation,
  mobileOverflowNavigation,
  primaryNavigation,
  routePresentation,
} from "./navigation"

function useActiveRoutePath() {
  const matchRoute = useMatchRoute()
  if (matchRoute({ to: "/sector-radar", fuzzy: true })) return "/sector-radar"
  if (matchRoute({ to: "/selection", fuzzy: true })) return "/selection"
  if (matchRoute({ to: "/sync", fuzzy: true })) return "/sync"
  if (matchRoute({ to: "/components", fuzzy: true })) return "/components"
  if (matchRoute({ to: "/", fuzzy: false })) return "/"
  return "/"
}

export function AppLayout() {
  const activePath = useActiveRoutePath()
  const presentation = routePresentation[activePath] ?? routePresentation["/"]
  const [moreOpen, setMoreOpen] = useState(false)

  return (
    <div className="flex h-svh min-h-0 flex-col overflow-hidden bg-background text-foreground md:grid md:grid-cols-[64px_minmax(0,1fr)] lg:grid-cols-[192px_minmax(0,1fr)]">
      <DesktopSidebar activePath={activePath} />
      <div className="flex min-h-0 min-w-0 flex-1 flex-col overflow-hidden">
        <TopBar
          breadcrumb={presentation.breadcrumb}
          title={presentation.title}
        />
        <main
          id="main-content"
          className="flex min-h-0 min-w-0 flex-1 flex-col overflow-hidden"
        >
          <Outlet />
        </main>
      </div>
      <MobileBottomNav
        activePath={activePath}
        onMore={() => setMoreOpen(true)}
      />
      <MoreSheet open={moreOpen} onOpenChange={setMoreOpen} />
    </div>
  )
}

function DesktopSidebar({ activePath }: { activePath: string }) {
  return (
    <aside
      aria-label="主导航"
      className="hidden shrink-0 flex-col border-r border-border bg-card/95 px-2 py-4 md:flex md:w-16 lg:w-48 lg:px-3"
    >
      <Brand />

      <p className="mt-7 mb-2 hidden px-2 text-[10px] font-bold tracking-[0.09em] text-muted-foreground uppercase lg:block">
        导航
      </p>
      <nav className="grid gap-0.5">
        {primaryNavigation.map((item) => (
          <DesktopNavItem
            key={item.id}
            item={item}
            active={item.to === activePath}
          />
        ))}
      </nav>

      <div className="mt-auto border-t border-border pt-3.5">
        <p className="hidden px-2 text-[11px] leading-[1.5] text-muted-foreground lg:block">
          知行量化研究工作台，从市场数据概览开始。
        </p>
      </div>
    </aside>
  )
}

function Brand() {
  return (
    <div className="flex min-h-10 items-center justify-center gap-2.5 px-0 lg:justify-start lg:px-1.5">
      <span className="grid size-8 shrink-0 place-items-center rounded-md bg-primary text-primary-foreground">
        <BarChart3 className="size-[17px]" aria-hidden="true" />
      </span>
      <div className="hidden min-w-0 lg:block">
        <p className="truncate text-sm font-semibold tracking-[-0.01em]">
          知行量化
        </p>
        <p className="text-[11px] text-muted-foreground">研究工作台</p>
      </div>
    </div>
  )
}

function DesktopNavItem({
  item,
  active,
}: {
  item: NavigationItem
  active: boolean
}) {
  const Icon = item.icon
  if (item.to) {
    return (
      <Link
        to={item.to}
        aria-current={active ? "page" : undefined}
        className={[
          "flex min-h-9 w-full items-center justify-center gap-2.5 rounded-md px-0 text-left text-[13px] transition-colors outline-none focus-visible:ring-3 focus-visible:ring-ring/50 lg:justify-start lg:px-2.5",
          active
            ? "bg-primary text-primary-foreground"
            : "text-muted-foreground hover:bg-muted hover:text-foreground",
        ].join(" ")}
      >
        <Icon className="size-4 shrink-0" aria-hidden="true" />
        <span className="hidden truncate lg:inline">{item.label}</span>
      </Link>
    )
  }
  return (
    <Button
      disabled
      variant="ghost"
      className="min-h-9 w-full justify-center gap-2.5 px-0 text-[13px] text-muted-foreground lg:justify-start lg:px-2.5"
    >
      <Icon className="size-4 shrink-0" aria-hidden="true" />
      <span className="hidden truncate lg:inline">{item.label}</span>
    </Button>
  )
}

function TopBar({ breadcrumb, title }: { breadcrumb: string; title: string }) {
  return (
    <header className="flex h-14 shrink-0 items-center gap-3 border-b border-border bg-background/90 px-4 backdrop-blur md:px-6">
      <div className="min-w-0">
        <p className="text-[11px] text-muted-foreground">{breadcrumb}</p>
        <p className="truncate text-[13px] font-semibold">{title}</p>
      </div>
      <div className="ml-auto flex items-center gap-2">
        <div className="relative hidden w-[min(330px,28vw)] md:block">
          <Search
            className="pointer-events-none absolute top-1/2 left-2.5 size-3.5 -translate-y-1/2 text-muted-foreground"
            aria-hidden="true"
          />
          <Input
            aria-label="搜索"
            className="h-8 pl-8 text-xs"
            placeholder="搜索股票、数据或功能"
            readOnly
          />
        </div>
        <Avatar aria-label="用户头像" size="sm">
          <AvatarFallback>研</AvatarFallback>
        </Avatar>
      </div>
    </header>
  )
}

function MobileBottomNav({
  activePath,
  onMore,
}: {
  activePath: string
  onMore: () => void
}) {
  const visible = mobilePrimaryNavigation
  return (
    <nav
      aria-label="移动端主导航"
      className="fixed inset-x-0 bottom-0 z-30 flex items-stretch gap-1 border-t border-border bg-card px-1 pb-[env(safe-area-inset-bottom)] md:hidden"
      style={{ minHeight: "60px" }}
    >
      {visible.map((item) => {
        const Icon = item.icon
        const active = item.to === activePath
        if (item.to) {
          return (
            <Link
              key={item.id}
              to={item.to}
              aria-current={active ? "page" : undefined}
              className="flex min-h-[60px] min-w-[44px] flex-1 flex-col items-center justify-center gap-0.5 rounded-md text-[10px] text-muted-foreground outline-none active:bg-muted focus-visible:ring-3 focus-visible:ring-ring/50"
            >
              <Icon className="size-5" aria-hidden="true" />
              <span>{item.label}</span>
            </Link>
          )
        }
        return (
          <button
            key={item.id}
            type="button"
            disabled
            className="flex min-h-[60px] min-w-[44px] flex-1 flex-col items-center justify-center gap-0.5 rounded-md text-[10px] text-muted-foreground/50"
          >
            <Icon className="size-5" aria-hidden="true" />
            <span>{item.label}</span>
          </button>
        )
      })}
      <button
        type="button"
        onClick={onMore}
        aria-label="更多功能"
        className="flex min-h-[60px] min-w-[44px] flex-1 flex-col items-center justify-center gap-0.5 rounded-md text-[10px] text-muted-foreground outline-none active:bg-muted focus-visible:ring-3 focus-visible:ring-ring/50"
      >
        <span
          className="grid h-5 w-5 place-items-center text-base leading-none"
          aria-hidden="true"
        >
          ···
        </span>
        <span>更多</span>
      </button>
    </nav>
  )
}

function MoreSheet({
  open,
  onOpenChange,
}: {
  open: boolean
  onOpenChange: (open: boolean) => void
}) {
  const overflow = mobileOverflowNavigation
  if (overflow.length === 0) {
    return (
      <Dialog open={open} onOpenChange={onOpenChange}>
        <DialogContent showCloseButton={false}>
          <DialogHeader>
            <DialogTitle>更多功能</DialogTitle>
            <DialogDescription>
              行情数据尚未上线，暂无更多可用入口。
            </DialogDescription>
          </DialogHeader>
        </DialogContent>
      </Dialog>
    )
  }
  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent showCloseButton={false}>
        <DialogHeader>
          <DialogTitle>更多功能</DialogTitle>
          <DialogDescription>
            以下入口尚未上线，仅作占位说明。
          </DialogDescription>
        </DialogHeader>
        <ul className="space-y-1">
          {overflow.map((item) => {
            const Icon = item.icon
            return (
              <li key={item.id}>
                <Button
                  disabled
                  variant="ghost"
                  className="w-full justify-start gap-2.5"
                >
                  <Icon className="size-4" aria-hidden="true" />
                  {item.label}
                </Button>
              </li>
            )
          })}
        </ul>
      </DialogContent>
    </Dialog>
  )
}