"use client"

import { useEffect, useState } from "react"
import Link from "next/link"
import { ChevronDownIcon } from "lucide-react"
import { OpsPanel } from "@/components/ops-panel"
import { Alert, AlertDescription, AlertTitle } from "@/components/reui/alert"
import { buttonVariants } from "@/components/ui/button"
import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
} from "@/components/ui/collapsible"
import { cn } from "@/lib/utils"
import type { InternetPathViewModel } from "@/lib/dashboard-internet-path"
import { InternetPathMapCanvas } from "@/components/dashboard/internet-path-map"
import { InternetPathSummary } from "@/components/dashboard/internet-path-summary"

const PATH_MAP_OPEN_LS = "mm:dashboard-path-map-open"

function readMapOpen(): boolean {
  if (typeof window === "undefined") return true
  try {
    const raw = localStorage.getItem(PATH_MAP_OPEN_LS)
    if (raw === "0") return false
    if (raw === "1") return true
  } catch {
    /* ignore */
  }
  return true
}

export function InternetPathPanel({
  model,
  loading,
  error,
}: {
  model: InternetPathViewModel | null
  loading?: boolean
  error?: string | null
}) {
  const [open, setOpen] = useState(true)
  const [hydrated, setHydrated] = useState(false)

  useEffect(() => {
    queueMicrotask(() => {
      setOpen(readMapOpen())
      setHydrated(true)
    })
  }, [])

  function handleOpenChange(next: boolean) {
    setOpen(next)
    try {
      localStorage.setItem(PATH_MAP_OPEN_LS, next ? "1" : "0")
    } catch {
      /* ignore */
    }
  }

  return (
    <OpsPanel
      title="Internet path"
      description="Home → WAN → JH → Exit"
      headerRight={
        <Link href="/network-map" className={cn(buttonVariants({ variant: "outline", size: "sm" }), "h-7 text-xs")}>
          Карта сети →
        </Link>
      }
      contentClassName="flex flex-col gap-3 px-5 pb-4"
    >
      {error ? (
        <Alert variant="destructive">
          <AlertTitle>Не удалось загрузить путь</AlertTitle>
          <AlertDescription>{error}</AlertDescription>
        </Alert>
      ) : null}
      {loading && !model ? (
        <div className="h-20 animate-pulse rounded-md bg-muted/40" />
      ) : (
        <InternetPathSummary model={model} />
      )}

      <Collapsible open={hydrated ? open : true} onOpenChange={handleOpenChange}>
        <CollapsibleTrigger
          className={cn(buttonVariants({ variant: "ghost", size: "sm" }), "h-7 w-fit gap-1.5 text-xs")}
        >
          <ChevronDownIcon className={cn("size-3.5 transition-transform", open && "rotate-180")} />
          {open ? "Скрыть карту" : "Показать карту"}
        </CollapsibleTrigger>
        <CollapsibleContent>
          <InternetPathMapCanvas model={model} />
        </CollapsibleContent>
      </Collapsible>
    </OpsPanel>
  )
}