"use client"

import * as React from "react"
import { NavMain, type NavGroup } from "@/components/nav-main"
import { AppSwitcher } from "@/components/app-switcher"
import { NavUser } from "@/components/nav-user"
import {
  Sidebar,
  SidebarContent,
  SidebarFooter,
  SidebarHeader,
} from "@/components/ui/sidebar"
import { navigationGroups } from "@/lib/navigation"
import { useDataSource } from "@/lib/data-source"
import { can,ensureAuthConfig } from "@/lib/auth"
import { useEvoBGP } from "@/lib/evobgp-context"
import {getSidebarCounts,getSidebarGreCount} from "@/shared/api/sidebar-counts"
import {
  formatSidebarBadgeCount,
  mockSidebarBadgesByUrl,
  type SidebarCountsDto,
} from "@/lib/sidebar-badges"

type LiveSidebarCounts = Partial<SidebarCountsDto> & {
  greTunnels?: number
  certificates?: number
  wireguard?: number
  ipsec?: number
  users?: number
  bgpSessions?: number
  vxlan?: number
  containers?: number
}

export function AppSidebar({ ...props }: React.ComponentProps<typeof Sidebar>) {
  const { mode, backendUrl, prefsHydrated } = useDataSource()
  const evo = useEvoBGP()
  const [mounted, setMounted] = React.useState(false)
  const [snapshot, setSnapshot] = React.useState<{source:string;counts:LiveSidebarCounts}|null>(null)
  const source=JSON.stringify([mode,backendUrl]),liveCounts=snapshot?.source===source?snapshot.counts:null
  const countsAllowed=can("mm:dashboard:read"),greAllowed=can("mm:filters:read")

  const mockBadges = React.useMemo(() => mockSidebarBadgesByUrl(), [])

  React.useEffect(() => {
    let cancelled=false
    void ensureAuthConfig().then(()=>{if(!cancelled)setMounted(true)})
    return()=>{cancelled=true}
  }, [])

  React.useEffect(() => {
    if(!mounted||!prefsHydrated||mode!=="live")return
    let cancelled=false,revision=0,controller:AbortController|null=null
    const load=async()=>{
      controller?.abort();controller=new AbortController();const request=++revision,signal=AbortSignal.any([controller.signal,AbortSignal.timeout(30_000)])
      const publish=(counts:LiveSidebarCounts)=>{if(cancelled||request!==revision)return;setSnapshot(previous=>({source,counts:{...(previous?.source===source?previous.counts:{}),...counts}}))}
      await Promise.allSettled([
        can("mm:dashboard:read")?getSidebarCounts(backendUrl,signal).then(counts=>{if(can("mm:dashboard:read"))publish(counts)}):Promise.resolve(),
        can("mm:filters:read")?getSidebarGreCount(backendUrl,signal).then(greTunnels=>{if(can("mm:filters:read"))publish({greTunnels})}):Promise.resolve(),
      ])
    }
    void load();const timer=window.setInterval(load,120_000)
    return()=>{cancelled=true;revision++;controller?.abort();window.clearInterval(timer)}
  },[mounted,mode,backendUrl,prefsHydrated,source,countsAllowed,greAllowed])

  const navGroups = React.useMemo((): NavGroup[] => {
    function badgeFor(url: string): string | undefined {
      if (mode !== "live") return mockBadges[url]

      if (url === "/domains" || url === "/ip-ranges" || url === "/asns") {
        if (!evo.settingsLoaded || !evo.enabled || !can("mm:settings:admin")) return undefined
        if (!evo.snapshot) return undefined
        if (url === "/domains") return formatSidebarBadgeCount(evo.snapshot.domains.length)
        if (url === "/ip-ranges") return formatSidebarBadgeCount(evo.snapshot.ipRanges.length)
        return formatSidebarBadgeCount(evo.snapshot.asns.length)
      }

      if (!liveCounts||(!countsAllowed&&url!=="/gre")) return undefined
      const permission=({"/servers":"mm:servers:read","/users":"mm:users:read","/filters":"mm:filters:read","/uptime":"mm:uptime:read","/gre":"mm:filters:read","/certificates":"mm:certificates:read","/wireguard":"mm:network:read","/ipsec":"mm:network:read","/bgp":"mm:bgp:read","/vxlan":"mm:network:read","/containers":"mm:dashboard:read"} as Record<string,string>)[url]
      if(permission&&!can(permission))return undefined
      const format=(value:number|undefined)=>value===undefined?undefined:formatSidebarBadgeCount(value)

      if (url === "/servers") return format(liveCounts.servers)
      if (url === "/users") return format(liveCounts.users )
      if (url === "/filters") return format(liveCounts.filterRules)
      if (url === "/uptime") return format(liveCounts.monitoringItems)
      if (url === "/gre") return format(liveCounts.greTunnels )
      if (url === "/certificates") return format(liveCounts.certificates )
      if (url === "/wireguard") return format(liveCounts.wireguard )
      if (url === "/ipsec") return format(liveCounts.ipsec )
      if (url === "/bgp") return format(liveCounts.bgpSessions )
      if (url === "/vxlan") return format(liveCounts.vxlan )
      if (url === "/containers") return format(liveCounts.containers )

      return undefined
    }

    return navigationGroups.map((g) => ({
      label: g.label,
      items: g.items.map((it) => ({
        title: it.title,
        url: it.url,
        icon: React.createElement(it.icon, { "aria-hidden": true }),
        badge: mounted ? badgeFor(it.url) : undefined,
      })),
    }))
  }, [mounted, mode, liveCounts, countsAllowed, mockBadges, evo.settingsLoaded, evo.enabled, evo.snapshot])

  return (
    <Sidebar collapsible="icon" {...props}>
      <SidebarHeader>
        <AppSwitcher />
      </SidebarHeader>
      <SidebarContent>
        <NavMain groups={navGroups} />
      </SidebarContent>
      <SidebarFooter>
        <NavUser />
      </SidebarFooter>
    </Sidebar>
  )
}