"use client"

import * as React from "react"
import { useToast } from "@/hooks/use-toast"
import { useRouter, useParams, usePathname } from "next/navigation"
import { useTranslation } from "@/i18n/client"
import Link from "next/link"

import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuRadioGroup,
  DropdownMenuRadioItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import { GlobeIcon, ChevronDownIcon, Loader, Ship, LogIn, InfoIcon, HelpCircle } from "lucide-react"
import { languages } from "@/config/language"
import { cn } from "@/lib/utils"
import { buttonVariants } from "@/components/ui/button"
import { siteConfig } from "@/config/site"
import {
  Tooltip,
  TooltipContent,
  TooltipProvider,
  TooltipTrigger,
} from "@/components/ui/tooltip"
import {
  Alert,
  AlertDescription,
  AlertTitle,
} from "@/components/ui/alert"

import { checkJoinPortal } from "@/lib/vendors/service"
import Image from "next/image"
// ↑ 실제 경로 맞춤 수정 (ex: "@/app/[lng]/actions/joinPortal" 등)

interface UserAuthFormProps extends React.HTMLAttributes<HTMLDivElement> { }

export function CompanyAuthForm({ className, ...props }: UserAuthFormProps) {
  const [isLoading, setIsLoading] = React.useState<boolean>(false)
  const [showInfoBanner, setShowInfoBanner] = React.useState<boolean>(true)
  const router = useRouter()
  const { toast } = useToast()

  const params = useParams() || {};
  const pathname = usePathname() || '';

  const lng = params.lng as string
  const { t, i18n } = useTranslation(lng, "login")

  const handleChangeLanguage = (lang: string) => {
    const segments = pathname.split("/")
    segments[1] = lang
    router.push(segments.join("/"))
  }

  const currentLanguageText =
    i18n.language === "ko"
      ? t("languages.korean")
      : i18n.language === "ja"
        ? t("languages.japanese")
        : t("languages.english")

  // 로그인 페이지로 이동
  const goToLogin = () => {
    router.push(`/${lng}/partners`);
  }

  // ---------------------------
  // 1) onSubmit -> 서버 액션 호출
  // ---------------------------
  async function onSubmit(event: React.FormEvent<HTMLFormElement>) {
    event.preventDefault()
    setIsLoading(true)

    const formData = new FormData(event.currentTarget)
    const taxID = formData.get("taxid")?.toString().trim()

    if (!taxID) {
      toast({
        variant: "destructive",
        title: "오류",
        description: "Tax ID를 입력해주세요.",
      })
      setIsLoading(false)
      return
    }

    try {
      // ---------------------------
      // 2) 서버 액션 호출
      // ---------------------------
      const result = await checkJoinPortal(taxID)

      if (result.success) {
        toast({
          variant: "default",
          title: "성공",
          description: "가입 신청이 가능합니다",
        })
        // 가입 가능 → signup 페이지 이동
        router.push(`/partners/signup?taxID=${taxID}`)
      } else {
        // 이미 등록된 기업인 경우 - 로그인으로 안내하는 토스트와 함께 추가 액션 제공
        toast({
          variant: "destructive",
          title: "가입이 진행 중이거나 완료된 회사",
          description: `${result.data} 에 연락하여 계정 생성 요청을 하시기 바랍니다.`,
        })

        // 로그인 액션 버튼이 있는 알림 표시
        setTimeout(() => {
          toast({
            title: "이미 등록된 회사이신가요?",
            description: "로그인 페이지로 이동하여 계정에 접속하세요.",
            action: (
              <Button variant="outline" onClick={goToLogin} className="bg-blue-50 border-blue-300">
                <LogIn className="mr-2 h-4 w-4" />
                로그인하기
              </Button>
            ),
          })
        }, 1000);
      }
    } catch (error: any) {
      console.error(error)
      toast({
        variant: "destructive",
        title: "오류",
        description: "서버 액션 호출에 실패했습니다. 잠시 후 다시 시도해주세요.",
      })
    } finally {
      setIsLoading(false)
    }
  }

  return (
    <div className="container relative flex h-screen flex-col items-center justify-center md:grid lg:max-w-none lg:grid-cols-2 lg:px-0">

      {/* Left BG 이미지 영역 */}

      <div className="flex flex-col w-full h-screen lg:p-2">
        {/* Top bar */}
        <div className="flex items-center justify-between p-4">
          <div className="flex items-center space-x-2">
            <Ship className="w-4 h-4" />
            <span className="text-md font-bold">eVCP</span>
          </div>

          {/* 로그인 버튼 가시성 개선 */}
          <Link
            href={`/${lng}/partners`}
            className={cn(
              buttonVariants({ variant: "outline" }),
              "border-blue-500 text-blue-600 hover:bg-blue-50"
            )}
          >
            <LogIn className="mr-2 h-4 w-4" />
            {t("login") || "로그인"}
          </Link>
        </div>
        <div className="flex-1 flex items-center justify-center">
          <div className="mx-auto w-full flex flex-col space-y-6 sm:w-[400px]">
            {/* 정보 알림 배너 - 업체 등록과 로그인의 관계 설명 */}
            {showInfoBanner && (
              <Alert className="bg-blue-50 border-blue-200">
                <InfoIcon className="h-4 w-4 text-blue-600" />
                <AlertTitle className="text-blue-700 mt-1">
                  {t("registrationInfoTitle") || "업체 등록 신청 안내"}
                </AlertTitle>
                <AlertDescription className="text-blue-600">
                  {t("registrationInfoDescription") || "이미 등록된 업체의 직원이신가요? 상단의 로그인 버튼을 눌러 로그인하세요. 새로운 업체 등록을 원하시면 아래 양식을 작성해주세요."}
                </AlertDescription>
                <Button
                  variant="ghost"
                  size="sm"
                  onClick={() => setShowInfoBanner(false)}
                  className="absolute top-2 right-4 h-6 w-6 p-0"
                >
                  ✕
                </Button>
              </Alert>
            )}

            <div className="flex flex-col space-y-2 text-center">
              <h1 className="text-2xl font-semibold tracking-tight">
                {t("heading") || "업체 등록 신청"}
              </h1>
              <p className="text-sm text-muted-foreground">
                {t("subheading") || "귀사의 사업자 등록 번호를 입력하여 등록을 시작하세요"}
              </p>
            </div>

            <div className={cn("grid gap-6", className)} {...props}>
              <form onSubmit={onSubmit}>
                <div className="grid gap-4">
                  <div className="grid gap-2">
                    <div className="flex items-center justify-between">
                      <Label htmlFor="taxid">
                        사업자등록번호 / Tax ID
                      </Label>
                      <TooltipProvider>
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <Button variant="ghost" size="icon" className="h-6 w-6 p-0">
                              <HelpCircle className="h-4 w-4 text-muted-foreground" />
                              <span className="sr-only">Help</span>
                            </Button>
                          </TooltipTrigger>
                          <TooltipContent>
                            <p className="max-w-xs">
                              {t("taxIdTooltip") || "법인/개인사업자 사업자등록번호를 '-' 포함하여 입력해주세요 (예: 123-45-67890)"}
                            </p>
                          </TooltipContent>
                        </Tooltip>
                      </TooltipProvider>
                    </div>
                    <input
                      id="taxid"
                      name="taxid"
                      placeholder="880-81-01710"
                      type="text"
                      autoCapitalize="none"
                      autoComplete="off"
                      autoCorrect="off"
                      disabled={isLoading}
                      className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm shadow-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:opacity-50"
                    />
                    <p className="text-xs text-muted-foreground">
                      {t("taxIdHint") || "사업자 등록 번호는 업체 인증에 사용됩니다"}
                    </p>
                  </div>
                  <Button type="submit" disabled={isLoading} variant="samsung">
                    {isLoading && <Loader className="mr-2 h-4 w-4 animate-spin" />}
                    {t("joinButton") || "업체 등록 시작하기"}
                  </Button>

                  {/* 로그인 안내 링크 추가 */}
                  <div className="text-center">
                    <Button
                      variant="link"
                      className="text-blue-600 hover:text-blue-800 text-sm"
                      onClick={goToLogin}
                      type="button"
                    >
                      {t("alreadyRegistered") || "이미 등록된 업체이신가요? 로그인하기"}
                    </Button>
                  </div>

                  {/* 언어 선택 Dropdown */}
                  <div className="mx-auto">
                    <DropdownMenu>
                      <DropdownMenuTrigger asChild>
                        <Button variant="ghost" className="flex items-center gap-2">
                          <GlobeIcon className="h-4 w-4" />
                          <span>{currentLanguageText}</span>
                          <ChevronDownIcon className="h-4 w-4" />
                        </Button>
                      </DropdownMenuTrigger>
                      <DropdownMenuContent align="end">
                        <DropdownMenuRadioGroup
                          value={i18n.language}
                          onValueChange={(value) => handleChangeLanguage(value)}
                        >
                          {languages.map((v) => (
                            <DropdownMenuRadioItem key={v.value} value={v.value}>
                              {t(v.labelKey)}
                            </DropdownMenuRadioItem>
                          ))}
                        </DropdownMenuRadioGroup>
                      </DropdownMenuContent>
                    </DropdownMenu>
                  </div>
                </div>
              </form>
            </div>
            <p className="px-8 text-center text-sm text-muted-foreground">
              {t("agreement")}{" "}
              <Link
                href={`/${lng}/privacy`}  // 개인정보처리방침만 남김
                className="underline underline-offset-4 hover:text-primary"
              >
                {t("privacyPolicy")}
              </Link>
              {/* {t("privacyAgreement")}.  */}
            </p>
          </div>
        </div>

      </div>


      {/* Right Content */}
      <div className="relative hidden h-full flex-col p-10 text-white dark:border-r md:flex">
        {/* Image 컴포넌트로 대체 */}
        <div className="absolute inset-0">
          <Image
            src="/images/02.jpg"
            alt="Background image"
            fill
            priority
            sizes="(max-width: 1024px) 100vw, 50vw"
            className="object-cover"
          />
        </div>
        <div className="relative z-10 mt-auto">
          <blockquote className="space-y-2">
            <p className="text-sm">&ldquo;{t("blockquote")}&rdquo;</p>
            {/* <footer className="text-sm">SHI</footer> */}
          </blockquote>
        </div>
      </div>

    </div>
  )
}