"use client"

import * as React from "react"
import { useState } from "react"
import { useForm } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"
import { z } from "zod"
import { toast } from "sonner"
import { Check, ChevronsUpDown, File, Upload, X } from "lucide-react"

import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from "@/components/ui/dialog"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Form, FormControl, FormField, FormItem, FormLabel, FormMessage } from "@/components/ui/form"
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
import { ProcurementRfqsView } from "@/db/schema"
import { addVendorToRfq } from "@/lib/procurement-rfqs/services"
import { Command, CommandEmpty, CommandGroup, CommandInput, CommandItem, CommandList } from "@/components/ui/command"
import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover"
import { cn } from "@/lib/utils"
import { ScrollArea } from "@/components/ui/scroll-area"

// 필수 필드를 위한 커스텀 레이블 컴포넌트
const RequiredLabel = ({ children }: { children: React.ReactNode }) => (
  <FormLabel>
    {children} <span className="text-red-500">*</span>
  </FormLabel>
);

// 폼 유효성 검증 스키마
const vendorFormSchema = z.object({
  vendorId: z.string().min(1, "벤더를 선택해주세요"),
  currency: z.string().min(1, "통화를 선택해주세요"),
  paymentTermsCode: z.string().min(1, "지불 조건을 선택해주세요"),
  incotermsCode: z.string().min(1, "인코텀즈를 선택해주세요"),
  incotermsDetail: z.string().optional(),
  deliveryDate: z.string().optional(),
  taxCode: z.string().optional(),
  placeOfShipping: z.string().optional(),
  placeOfDestination: z.string().optional(),
  materialPriceRelatedYn: z.boolean().default(false),
})

type VendorFormValues = z.infer<typeof vendorFormSchema>

interface AddVendorDialogProps {
  open: boolean
  onOpenChange: (open: boolean) => void
  selectedRfq: ProcurementRfqsView | null
  // 벤더 및 기타 옵션 데이터를 prop으로 받음
  vendors?: { id: number; vendorName: string; vendorCode: string }[]
  currencies?: { code: string; name: string }[]
  paymentTerms?: { code: string; description: string }[]
  incoterms?: { code: string; description: string }[]
  onSuccess?: () => void
  existingVendorIds?: number[]

}

export function AddVendorDialog({
  open,
  onOpenChange,
  selectedRfq,
  vendors = [],
  currencies = [],
  paymentTerms = [],
  incoterms = [],
  onSuccess,
  existingVendorIds = [], // 기본값 빈 배열
}: AddVendorDialogProps) {


  const availableVendors = React.useMemo(() => {
    return vendors.filter(vendor => !existingVendorIds.includes(vendor.id));
  }, [vendors, existingVendorIds]);


  // 파일 업로드 상태 관리
  const [attachments, setAttachments] = useState<File[]>([])
  const [isSubmitting, setIsSubmitting] = useState(false)

  // 벤더 선택을 위한 팝오버 상태
  const [vendorOpen, setVendorOpen] = useState(false)

  const form = useForm<VendorFormValues>({
    resolver: zodResolver(vendorFormSchema),
    defaultValues: {
      vendorId: "",
      currency: "",
      paymentTermsCode: "",
      incotermsCode: "",
      incotermsDetail: "",
      deliveryDate: "",
      taxCode: "",
      placeOfShipping: "",
      placeOfDestination: "",
      materialPriceRelatedYn: false,
    },
  })

  // 폼 제출 핸들러
  async function onSubmit(values: VendorFormValues) {
    if (!selectedRfq) {
      toast.error("선택된 RFQ가 없습니다")
      return
    }

    try {
      setIsSubmitting(true)

      // FormData 생성
      const formData = new FormData()
      formData.append("rfqId", selectedRfq.id.toString())

      // 폼 데이터 추가
      Object.entries(values).forEach(([key, value]) => {
        formData.append(key, value.toString())
      })

      // 첨부파일 추가
      attachments.forEach((file, index) => {
        formData.append(`attachment-${index}`, file)
      })

      // 서버 액션 호출
      const result = await addVendorToRfq(formData)

      if (result.success) {
        toast.success("벤더가 성공적으로 추가되었습니다")
        onOpenChange(false)
        form.reset()
        setAttachments([])
        onSuccess?.()
      } else {
        toast.error(result.message || "벤더 추가 중 오류가 발생했습니다")
      }
    } catch (error) {
      console.error("벤더 추가 오류:", error)
      toast.error("벤더 추가 중 오류가 발생했습니다")
    } finally {
      setIsSubmitting(false)
    }
  }

  // 파일 업로드 핸들러
  const handleFileUpload = (event: React.ChangeEvent<HTMLInputElement>) => {
    if (event.target.files && event.target.files.length > 0) {
      const newFiles = Array.from(event.target.files)
      setAttachments((prev) => [...prev, ...newFiles])
    }
  }

  // 파일 삭제 핸들러
  const handleRemoveFile = (index: number) => {
    setAttachments((prev) => prev.filter((_, i) => i !== index))
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      {/* 커스텀 DialogContent - 고정 헤더, 스크롤 가능한 콘텐츠, 고정 푸터 */}
      <DialogContent className="sm:max-w-[600px] p-0 h-[85vh] flex flex-col overflow-hidden" style={{maxHeight:'85vh'}}>
        {/* 고정 헤더 */}
        <div className="p-6 border-b">
          <DialogHeader>
            <DialogTitle>벤더 추가</DialogTitle>
            <DialogDescription>
              {selectedRfq ? (
                <>
                  <span className="font-medium">{selectedRfq.rfqCode}</span> RFQ에 벤더를 추가합니다.
                </>
              ) : (
                "RFQ에 벤더를 추가합니다."
              )}
            </DialogDescription>
          </DialogHeader>
        </div>

        {/* 스크롤 가능한 콘텐츠 영역 */}
        <div className="flex-1 overflow-y-auto p-6">
          <Form {...form}>
            <form id="vendor-form" onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
              {/* 검색 가능한 벤더 선택 필드 */}
              <FormField
                control={form.control}
                name="vendorId"
                render={({ field }) => (
                  <FormItem className="flex flex-col">
                    <RequiredLabel>벤더</RequiredLabel>
                    <Popover open={vendorOpen} onOpenChange={setVendorOpen}>
                      <PopoverTrigger asChild>
                        <FormControl>
                          <Button
                            variant="outline"
                            role="combobox"
                            aria-expanded={vendorOpen}
                            className={cn(
                              "w-full justify-between",
                              !field.value && "text-muted-foreground"
                            )}
                          >
                            {field.value
                              ? vendors.find((vendor) => String(vendor.id) === field.value)
                                ? `${vendors.find((vendor) => String(vendor.id) === field.value)?.vendorName} (${vendors.find((vendor) => String(vendor.id) === field.value)?.vendorCode})`
                                : "벤더를 선택하세요"
                              : "벤더를 선택하세요"}
                            <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
                          </Button>
                        </FormControl>
                      </PopoverTrigger>
                      <PopoverContent className="w-[400px] p-0">
                        <Command>
                          <CommandInput placeholder="벤더 검색..." />
                          <CommandEmpty>검색 결과가 없습니다</CommandEmpty>
                          <CommandList>
                            <ScrollArea className="h-60">
                              <CommandGroup>
                                {availableVendors.length > 0 ? (
                                  availableVendors.map((vendor) => (
                                    <CommandItem
                                      key={vendor.id}
                                      value={`${vendor.vendorName} ${vendor.vendorCode}`}
                                      onSelect={() => {
                                        form.setValue("vendorId", String(vendor.id), {
                                          shouldValidate: true,
                                        })
                                        setVendorOpen(false)
                                      }}
                                    >
                                      <Check
                                        className={cn(
                                          "mr-2 h-4 w-4",
                                          String(vendor.id) === field.value
                                            ? "opacity-100"
                                            : "opacity-0"
                                        )}
                                      />
                                      {vendor.vendorName} ({vendor.vendorCode})
                                    </CommandItem>
                                  ))
                                ) : (
                                  <CommandItem disabled>추가 가능한 벤더가 없습니다</CommandItem>
                                )}
                              </CommandGroup>
                            </ScrollArea>
                          </CommandList>
                        </Command>
                      </PopoverContent>
                    </Popover>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <FormField
                control={form.control}
                name="currency"
                render={({ field }) => (
                  <FormItem>
                    <RequiredLabel>통화</RequiredLabel>
                    <Select onValueChange={field.onChange} defaultValue={field.value}>
                      <FormControl>
                        <SelectTrigger>
                          <SelectValue placeholder="통화를 선택하세요" />
                        </SelectTrigger>
                      </FormControl>
                      <SelectContent>
                        {currencies.map((currency) => (
                          <SelectItem key={currency.code} value={currency.code}>
                            {currency.name} ({currency.code})
                          </SelectItem>
                        ))}
                      </SelectContent>
                    </Select>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <div className="grid grid-cols-2 gap-4">
                <FormField
                  control={form.control}
                  name="paymentTermsCode"
                  render={({ field }) => (
                    <FormItem>
                      <RequiredLabel>지불 조건</RequiredLabel>
                      <Select onValueChange={field.onChange} defaultValue={field.value}>
                        <FormControl>
                          <SelectTrigger>
                            <SelectValue placeholder="지불 조건 선택" />
                          </SelectTrigger>
                        </FormControl>
                        <SelectContent>
                          {paymentTerms.map((term) => (
                            <SelectItem key={term.code} value={term.code}>
                              {term.description}
                            </SelectItem>
                          ))}
                        </SelectContent>
                      </Select>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={form.control}
                  name="incotermsCode"
                  render={({ field }) => (
                    <FormItem>
                      <RequiredLabel>인코텀즈</RequiredLabel>
                      <Select onValueChange={field.onChange} defaultValue={field.value}>
                        <FormControl>
                          <SelectTrigger>
                            <SelectValue placeholder="인코텀즈 선택" />
                          </SelectTrigger>
                        </FormControl>
                        <SelectContent>
                          {incoterms.map((incoterm) => (
                            <SelectItem key={incoterm.code} value={incoterm.code}>
                              {incoterm.description}
                            </SelectItem>
                          ))}
                        </SelectContent>
                      </Select>
                      <FormMessage />
                    </FormItem>
                  )}
                />
              </div>

              {/* 나머지 필드들은 동일하게 유지 */}
              <FormField
                control={form.control}
                name="incotermsDetail"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>인코텀즈 세부사항</FormLabel>
                    <FormControl>
                      <Input {...field} placeholder="인코텀즈 세부사항" />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <div className="grid grid-cols-2 gap-4">
                <FormField
                  control={form.control}
                  name="deliveryDate"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>납품 예정일</FormLabel>
                      <FormControl>
                        <Input {...field} type="date" />
                      </FormControl>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={form.control}
                  name="taxCode"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>세금 코드</FormLabel>
                      <FormControl>
                        <Input {...field} placeholder="세금 코드" />
                      </FormControl>
                      <FormMessage />
                    </FormItem>
                  )}
                />
              </div>

              <div className="grid grid-cols-2 gap-4">
                <FormField
                  control={form.control}
                  name="placeOfShipping"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>선적지</FormLabel>
                      <FormControl>
                        <Input {...field} placeholder="선적지" />
                      </FormControl>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={form.control}
                  name="placeOfDestination"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>도착지</FormLabel>
                      <FormControl>
                        <Input {...field} placeholder="도착지" />
                      </FormControl>
                      <FormMessage />
                    </FormItem>
                  )}
                />
              </div>

              <FormField
                control={form.control}
                name="materialPriceRelatedYn"
                render={({ field }) => (
                  <FormItem className="flex flex-row items-start space-x-3 space-y-0 rounded-md border p-4">
                    <FormControl>
                      <input
                        type="checkbox"
                        checked={field.value}
                        onChange={field.onChange}
                        className="h-4 w-4 rounded border-gray-300 text-indigo-600 focus:ring-indigo-500"
                      />
                    </FormControl>
                    <div className="space-y-1 leading-none">
                      <FormLabel>하도급대금 연동제 여부</FormLabel>
                    </div>
                  </FormItem>
                )}
              />

              {/* 파일 업로드 섹션 */}
              <div className="space-y-2">
                <Label>첨부 파일</Label>
                <div className="border rounded-md p-4">
                  <div className="flex items-center justify-center w-full">
                    <label
                      htmlFor="file-upload"
                      className="flex flex-col items-center justify-center w-full h-32 border-2 border-dashed rounded-lg cursor-pointer bg-gray-50 hover:bg-gray-100"
                    >
                      <div className="flex flex-col items-center justify-center pt-5 pb-6">
                        <Upload className="w-8 h-8 mb-2 text-gray-500" />
                        <p className="mb-2 text-sm text-gray-500">
                          <span className="font-semibold">클릭하여 파일 업로드</span> 또는 파일을 끌어 놓으세요
                        </p>
                        <p className="text-xs text-gray-500">PDF, DOCX, XLSX, JPG, PNG (최대 10MB)</p>
                      </div>
                      <input
                        id="file-upload"
                        type="file"
                        className="hidden"
                        multiple
                        onChange={handleFileUpload}
                      />
                    </label>
                  </div>

                  {/* 업로드된 파일 목록 */}
                  {attachments.length > 0 && (
                    <div className="mt-4 space-y-2">
                      <h4 className="text-sm font-medium">업로드된 파일</h4>
                      <ul className="space-y-2">
                        {attachments.map((file, index) => (
                          <li
                            key={index}
                            className="flex items-center justify-between p-2 text-sm bg-gray-50 rounded-md"
                          >
                            <div className="flex items-center space-x-2">
                              <File className="w-4 h-4 text-gray-500" />
                              <span className="truncate max-w-[250px]">{file.name}</span>
                              <span className="text-gray-500 text-xs">
                                ({(file.size / 1024).toFixed(1)} KB)
                              </span>
                            </div>
                            <Button
                              type="button"
                              variant="ghost"
                              size="sm"
                              onClick={() => handleRemoveFile(index)}
                            >
                              <X className="w-4 h-4 text-gray-500" />
                            </Button>
                          </li>
                        ))}
                      </ul>
                    </div>
                  )}
                </div>
              </div>
            </form>
          </Form>
        </div>

        {/* 고정 푸터 */}
        <div className="p-6 border-t">
          <DialogFooter>
            <Button
              type="button"
              variant="outline"
              onClick={() => onOpenChange(false)}
              disabled={isSubmitting}
            >
              취소
            </Button>
            <Button
              type="submit"
              form="vendor-form"
              disabled={isSubmitting}
            >
              {isSubmitting ? "처리 중..." : "벤더 추가"}
            </Button>
          </DialogFooter>
        </div>
      </DialogContent>
    </Dialog>
  )
}