import {
  LayoutDashboard,
  Boxes,
  Network,
  Cog,
  ListChecks,
  Activity,
  Settings,
  BookText,
  KeyRound,
  ServerCog,
  Shield,
} from 'lucide-react'

import {
  Sidebar,
  SidebarContent,
  SidebarFooter,
  SidebarGroup,
  SidebarGroupContent,
  SidebarGroupLabel,
  SidebarHeader,
  SidebarInset,
  SidebarMenu,
  SidebarMenuButton,
  SidebarMenuItem,
  SidebarProvider,
  SidebarTrigger,
} from '@evobgp/ui/components/sidebar'
import {
  Breadcrumb,
  BreadcrumbItem,
  BreadcrumbLink,
  BreadcrumbList,
  BreadcrumbPage,
  BreadcrumbSeparator,
} from '@evobgp/ui/components/breadcrumb'
import { Separator } from '@evobgp/ui/components/separator'
import { TooltipProvider } from '@evobgp/ui/components/tooltip'

import { Link, useRouterState } from '@tanstack/react-router'
import type { ComponentType, CSSProperties, ReactNode } from 'react'

import { CommandPalette, type CommandPaletteItem } from '@/components/layout/command-palette'
import { SystemMonitorPopover } from '@/components/layout/system-monitor-popover'
import { ModeToggle } from '@/components/mode-toggle'

interface NavItem {
  to: string
  label: string
  icon: ComponentType<{ className?: string }>
  description?: string
  search?: Record<string, string>
}

interface NavGroup {
  label: string
  items: NavItem[]
}

const NAV_GROUPS: NavGroup[] = [
  {
    label: 'Обзор',
    items: [
      {
        to: '/dashboard',
        label: 'Панель',
        icon: LayoutDashboard,
        description: 'KPI, модули и активность',
      },
    ],
  },
  {
    label: 'Маршрутизация',
    items: [
      { to: '/modules', label: 'Модули', icon: Boxes, description: 'Списки префиксов и AS' },
      { to: '/network', label: 'Сеть', icon: Network, description: 'BGP-пиры и спикеры', search: { tab: 'overview' } },
      { to: '/directories', label: 'Справочники', icon: BookText, description: 'Communities и DoH' },
    ],
  },
  {
    label: 'Операции',
    items: [
      { to: '/operations', label: 'Операции', icon: Cog, description: 'Ревизии и apply', search: { tab: 'revisions' } },
      { to: '/firewall', label: 'Файрвол', icon: Shield, description: 'Клиенты и правила' },
      { to: '/schedule', label: 'Задачи', icon: ListChecks, description: 'Расписание refresh' },
      { to: '/monitoring', label: 'Мониторинг', icon: Activity, description: 'Health и BIRD', search: { tab: 'system' } },
    ],
  },
  {
    label: 'Система',
    items: [
      { to: '/access', label: 'Доступ', icon: KeyRound, description: 'API-ключи' },
      { to: '/tenant-settings', label: 'Настройки BIRD', icon: ServerCog, description: 'Tenant BIRD config' },
      { to: '/settings', label: 'Настройки UI', icon: Settings, description: 'Токен и подключение', search: { tab: 'connection' } },
    ],
  },
]

const ALL_NAV_ITEMS = NAV_GROUPS.flatMap((g) => g.items)

const ROUTE_LABELS: Record<string, string> = Object.fromEntries(
  ALL_NAV_ITEMS.map((i) => [i.to, i.label]),
)

const PARENT_ROUTE: Record<string, string> = {
  '/modules/new': '/modules',
}

const COMMAND_ITEMS: CommandPaletteItem[] = ALL_NAV_ITEMS.map((item) => ({
  id: item.to,
  label: item.label,
  description: item.description,
  to: item.to,
  search: item.search,
  keywords: [item.to.replace(/^\//, '')],
}))

export function AppShell({ children }: { children: ReactNode }) {
  const pathname = useRouterState({ select: (s) => s.location.pathname })
  const activeItem =
    ALL_NAV_ITEMS.find((i) => pathname === i.to || (i.to !== '/' && pathname.startsWith(`${i.to}/`))) ??
    ALL_NAV_ITEMS[0]
  const parentTo = PARENT_ROUTE[pathname] ?? PARENT_ROUTE[activeItem.to]
  const parentLabel = parentTo ? ROUTE_LABELS[parentTo] : null

  const pageTitle =
    pathname.startsWith('/modules/') && pathname !== '/modules/new'
      ? 'Модуль'
      : (ROUTE_LABELS[activeItem.to] ?? activeItem.label)

  return (
    <TooltipProvider delay={0}>
      <SidebarProvider
        style={
          {
            '--sidebar-width': '260px',
            '--sidebar-width-icon': '62px',
            '--header-height': '56px',
          } as CSSProperties
        }
      >
        <Sidebar collapsible="icon">
          <SidebarHeader className="gap-2">
            <div className="flex items-center gap-2 px-2 py-1.5">
              <div className="flex size-8 items-center justify-center rounded-md bg-primary text-primary-foreground text-sm font-bold">
                B
              </div>
              <div className="flex flex-col overflow-hidden group-data-[collapsible=icon]:hidden">
                <span className="truncate text-sm font-semibold">EvoBGP</span>
                <span className="truncate text-xs text-muted-foreground">Плоскость управления</span>
              </div>
            </div>
            <div className="px-2 group-data-[collapsible=icon]:px-0">
              <CommandPalette items={COMMAND_ITEMS} />
            </div>
          </SidebarHeader>
          <SidebarContent>
            {NAV_GROUPS.map((group) => (
              <SidebarGroup key={group.label}>
                <SidebarGroupLabel>{group.label}</SidebarGroupLabel>
                <SidebarGroupContent>
                  <SidebarMenu>
                    {group.items.map((item) => {
                      const Icon = item.icon
                      const isActive = pathname === item.to || pathname.startsWith(`${item.to}/`)
                      return (
                        <SidebarMenuItem key={item.to}>
                          <SidebarMenuButton
                            render={<Link to={item.to} search={item.search} />}
                            isActive={isActive}
                            tooltip={item.label}
                          >
                            <Icon className="size-4" />
                            <span>{item.label}</span>
                          </SidebarMenuButton>
                        </SidebarMenuItem>
                      )
                    })}
                  </SidebarMenu>
                </SidebarGroupContent>
              </SidebarGroup>
            ))}
          </SidebarContent>
          <SidebarFooter />
        </Sidebar>
        <SidebarInset>
          <header className="sticky top-0 z-10 flex h-(--header-height) shrink-0 items-center gap-2 border-b bg-background/95 px-4 backdrop-blur supports-[backdrop-filter]:bg-background/80">
            <SidebarTrigger />
            <Separator orientation="vertical" className="mr-2 data-[orientation=vertical]:h-4" />
            <Breadcrumb>
              <BreadcrumbList>
                {parentLabel && parentTo ? (
                  <>
                    <BreadcrumbItem className="hidden md:block">
                      <BreadcrumbLink render={<Link to={parentTo} />}>{parentLabel}</BreadcrumbLink>
                    </BreadcrumbItem>
                    <BreadcrumbSeparator className="hidden md:block" />
                  </>
                ) : null}
                <BreadcrumbItem>
                  <BreadcrumbPage>{pageTitle}</BreadcrumbPage>
                </BreadcrumbItem>
              </BreadcrumbList>
            </Breadcrumb>
            <div className="ml-auto flex items-center gap-2">
              <SystemMonitorPopover />
              <ModeToggle />
            </div>
          </header>
          <main className="flex flex-1 flex-col gap-4 p-4 md:gap-6 md:p-6">{children}</main>
        </SidebarInset>
      </SidebarProvider>
    </TooltipProvider>
  )
}