"use client"

import * as React from "react"
import { zodResolver } from "@hookform/resolvers/zod"
import { useForm } from "react-hook-form"
import { 
  Loader, 
  Activity, 
  AlertCircle, 
  AlertTriangle, 
  Circle as CircleIcon
} from "lucide-react"
import { toast } from "sonner"

import { Button } from "@/components/ui/button"
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage
} from "@/components/ui/form"
import { Input } from "@/components/ui/input"
import {
  Sheet,
  SheetClose,
  SheetContent,
  SheetDescription,
  SheetFooter,
  SheetHeader,
  SheetTitle,
} from "@/components/ui/sheet"
import {
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
import { useSession } from "next-auth/react"

import { TechVendor, techVendors } from "@/db/schema/techVendors"
import { updateTechVendorSchema, type UpdateTechVendorSchema } from "../validations"
import { modifyTechVendor } from "../service"

interface UpdateVendorSheetProps
  extends React.ComponentPropsWithRef<typeof Sheet> {
  vendor: TechVendor | null
}
type StatusType = (typeof techVendors.status.enumValues)[number];

type StatusConfig = {
  Icon: React.ElementType;
  className: string;
  label: string;
};

// 상태 표시 유틸리티 함수
const getStatusConfig = (status: StatusType): StatusConfig => {
  switch(status) {
    case "ACTIVE":
      return { 
        Icon: Activity,
        className: "text-emerald-600", 
        label: "활성 상태"
      };
    case "INACTIVE":
      return { 
        Icon: AlertCircle,
        className: "text-gray-600", 
        label: "비활성 상태"
      };
    case "BLACKLISTED":
      return { 
        Icon: AlertTriangle,
        className: "text-slate-800", 
        label: "거래 금지"
      };
    case "QUOTE_COMPARISON":
      return { 
        Icon: AlertTriangle,
        className: "text-slate-800", 
        label: "비교 견적"
      };
    case "PENDING_INVITE":
      return { 
        Icon: AlertTriangle,
        className: "text-slate-800", 
        label: "초대 대기"
      };
    case "INVITED":
      return { 
        Icon: AlertTriangle,
        className: "text-slate-800", 
        label: "초대 완료"
      };
    default:
      return { 
        Icon: CircleIcon,
        className: "text-gray-600", 
        label: status
      };
  }
};

// 폼 컴포넌트
export function UpdateVendorSheet({ vendor, ...props }: UpdateVendorSheetProps) {
  const [isPending, startTransition] = React.useTransition()
  const { data: session } = useSession()
  
  // 폼 정의 - UpdateVendorSchema 타입을 직접 사용
  const form = useForm<UpdateTechVendorSchema>({
    resolver: zodResolver(updateTechVendorSchema),
    defaultValues: {
      // 업체 기본 정보
      vendorName: vendor?.vendorName ?? "",
      vendorCode: vendor?.vendorCode ?? "",
      address: vendor?.address ?? "",
      country: vendor?.country ?? "",
      countryEng: vendor?.countryEng ?? "",
      countryFab: vendor?.countryFab ?? "",
      phone: vendor?.phone ?? "",
      email: vendor?.email ?? "",
      website: vendor?.website ?? "",
      techVendorType: vendor?.techVendorType ? vendor.techVendorType.split(',').map(s => s.trim()).filter(Boolean) as ("조선" | "해양TOP" | "해양HULL")[] : [],
      status: vendor?.status ?? "ACTIVE",
      // 에이전트 정보
      agentName: vendor?.agentName ?? "",
      agentEmail: vendor?.agentEmail ?? "",
      agentPhone: vendor?.agentPhone ?? "",
      // 대표자 정보
      representativeName: vendor?.representativeName ?? "",
      representativeEmail: vendor?.representativeEmail ?? "",
      representativePhone: vendor?.representativePhone ?? "",
      representativeBirth: vendor?.representativeBirth ?? "",
    },
  })

  React.useEffect(() => {
    if (vendor) {
      form.reset({
        vendorName: vendor?.vendorName ?? "",
        vendorCode: vendor?.vendorCode ?? "",
        address: vendor?.address ?? "",
        country: vendor?.country ?? "",
        countryEng: vendor?.countryEng ?? "",
        countryFab: vendor?.countryFab ?? "",
        phone: vendor?.phone ?? "",
        email: vendor?.email ?? "",
        website: vendor?.website ?? "",
        techVendorType: vendor?.techVendorType ? vendor.techVendorType.split(',').map(s => s.trim()).filter(Boolean) as ("조선" | "해양TOP" | "해양HULL")[] : [],
        status: vendor?.status ?? "ACTIVE",
        // 에이전트 정보
        agentName: vendor?.agentName ?? "",
        agentEmail: vendor?.agentEmail ?? "",
        agentPhone: vendor?.agentPhone ?? "",
        // 대표자 정보
        representativeName: vendor?.representativeName ?? "",
        representativeEmail: vendor?.representativeEmail ?? "",
        representativePhone: vendor?.representativePhone ?? "",
        representativeBirth: vendor?.representativeBirth ?? "",
      });
    }
  }, [vendor, form]);

  // 제출 핸들러
  async function onSubmit(data: UpdateTechVendorSchema) {
    if (!vendor) return
    
    if (!session?.user?.id) {
      toast.error("사용자 인증 정보를 찾을 수 없습니다.")
      return
    }
    
    startTransition(async () => {
      try {
        // Add status change comment if status has changed
        const oldStatus = vendor.status ?? "ACTIVE" // Default to ACTIVE if undefined
        const newStatus = data.status ?? "ACTIVE" // Default to ACTIVE if undefined
        
        const statusComment = 
          oldStatus !== newStatus 
            ? `상태 변경: ${getStatusConfig(oldStatus).label} → ${getStatusConfig(newStatus).label}`
            : ""  // Empty string instead of undefined
        
        // 업체 정보 업데이트 - userId와 상태 변경 코멘트 추가
        const { error } = await modifyTechVendor({ 
          id: String(vendor.id),
          userId: Number(session.user.id), // Add user ID from session
          comment: statusComment, // Add comment for status changes
          ...data,  // 모든 데이터 전달 - 서비스 함수에서 필요한 필드만 처리
          techVendorType: Array.isArray(data.techVendorType) ? data.techVendorType.join(',') : undefined,
        })
        
        if (error) throw new Error(error)
        
        toast.success("업체 정보가 업데이트되었습니다!")
        form.reset()
        props.onOpenChange?.(false)
      } catch (err: unknown) {
        toast.error(String(err))
      }
    })
  }

  return (
    <Sheet {...props}>
      <SheetContent className="flex flex-col gap-6 sm:max-w-xl overflow-y-auto">
        <SheetHeader className="text-left">
          <SheetTitle>업체 정보 수정</SheetTitle>
          <SheetDescription>
            업체 세부 정보를 수정하고 변경 사항을 저장하세요
          </SheetDescription>
        </SheetHeader>
        
        <Form {...form}>
          <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
            
            {/* 업체 기본 정보 섹션 */}
            <Card>
              <CardHeader className="pb-3">
                <CardTitle className="text-base">
                  업체 기본 정보
                </CardTitle>
                <CardDescription>
                  업체의 기본 정보를 관리합니다
                </CardDescription>
              </CardHeader>
              <CardContent className="space-y-4">
                <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                  {/* 업체명 */}
                  <FormField
                    control={form.control}
                    name="vendorName"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>업체명</FormLabel>
                        <FormControl>
                          <Input placeholder="업체명 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 업체 코드 */}
                  <FormField
                    control={form.control}
                    name="vendorCode"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>업체 코드</FormLabel>
                        <FormControl>
                          <Input placeholder="예: ABC123" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 이메일 */}
                  <FormField
                    control={form.control}
                    name="email"
                    render={({ field }) => (
                      <FormItem>
                                               <FormLabel>이메일</FormLabel>
                        <FormControl>
                          <Input placeholder="예: info@company.com" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 전화번호 */}
                  <FormField
                    control={form.control}
                    name="phone"
                    render={({ field }) => (
                      <FormItem>
                                               <FormLabel>전화번호</FormLabel>
                        <FormControl>
                          <Input placeholder="예: 010-1234-5678" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 웹사이트 */}
                  <FormField
                    control={form.control}
                    name="website"
                    render={({ field }) => (
                      <FormItem>
                                               <FormLabel>웹사이트</FormLabel>
                        <FormControl>
                          <Input placeholder="예: https://www.company.com" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />
                </div>

                {/* 주소 */}
                <FormField
                  control={form.control}
                  name="address"
                  render={({ field }) => (
                    <FormItem>
                                           <FormLabel>주소</FormLabel>
                      <FormControl>
                        <Input placeholder="주소 입력" {...field} />
                      </FormControl>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
                  {/* 국가 */}
                  <FormField
                    control={form.control}
                    name="country"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>국가</FormLabel>
                        <FormControl>
                          <Input placeholder="예: 대한민국" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 국가(영문) */}
                  <FormField
                    control={form.control}
                    name="countryEng"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>국가(영문)</FormLabel>
                        <FormControl>
                          <Input placeholder="예: South Korea" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 제조국가 */}
                  <FormField
                    control={form.control}
                    name="countryFab"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>제조국가</FormLabel>
                        <FormControl>
                          <Input placeholder="제조국가 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />
                </div>

                {/* 벤더 타입 */}
                <FormField
                  control={form.control}
                  name="techVendorType"
                  render={({ field }) => (
                    <FormItem>
                                           <FormLabel>벤더 타입 *</FormLabel>
                      <div className="flex gap-6">
                        {["조선", "해양TOP", "해양HULL"].map((type) => (
                          <div key={type} className="flex items-center space-x-2">
                            <input
                              type="checkbox"
                              id={`update-${type}`}
                              checked={field.value?.includes(type as "조선" | "해양TOP" | "해양HULL")}
                              onChange={(e) => {
                                const currentValue = Array.isArray(field.value) ? field.value : [];
                                if (e.target.checked) {
                                  field.onChange([...currentValue, type]);
                                } else {
                                  field.onChange(currentValue.filter((v: string) => v !== type));
                                }
                              }}
                              className="w-4 h-4"
                            />
                            <label htmlFor={`update-${type}`} className="text-sm font-medium cursor-pointer">
                              {type}
                            </label>
                          </div>
                        ))}
                      </div>
                      <FormMessage />
                    </FormItem>
                  )}
                />
              </CardContent>
            </Card>

            {/* 승인 상태 섹션 */}
            <Card>
                             <CardHeader className="pb-3">
                 <CardTitle className="text-base">
                   승인 상태
                 </CardTitle>
                <CardDescription>
                  업체의 승인 상태를 관리합니다
                </CardDescription>
              </CardHeader>
              <CardContent>
                <FormField
                  control={form.control}
                  name="status"
                  render={({ field }) => {
                    const selectedConfig = getStatusConfig(field.value ?? "ACTIVE");
                    const SelectedIcon = selectedConfig?.Icon || CircleIcon;

                    return (
                      <FormItem>
                        <FormLabel>업체 승인 상태</FormLabel>
                        <FormControl>
                          <Select
                            value={field.value || ""}
                            onValueChange={field.onChange}
                          >
                            <SelectTrigger className="w-full">
                              <SelectValue>
                                {field.value && (
                                  <div className="flex items-center">
                                    <SelectedIcon className={`mr-2 h-4 w-4 ${selectedConfig.className}`} />
                                    <span>{selectedConfig.label}</span>
                                  </div>
                                )}
                              </SelectValue>
                            </SelectTrigger>
                            <SelectContent>
                              <SelectGroup>
                                {techVendors.status.enumValues.map((status) => {
                                  const config = getStatusConfig(status);
                                  const StatusIcon = config.Icon;
                                  return (
                                    <SelectItem key={status} value={status}>
                                      <div className="flex items-center">
                                        <StatusIcon className={`mr-2 h-4 w-4 ${config.className}`} />
                                        <span>{config.label}</span>
                                      </div>
                                    </SelectItem>
                                  );
                                })}
                              </SelectGroup>
                            </SelectContent>
                          </Select>
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    );
                  }}
                />
              </CardContent>
            </Card>

            {/* 에이전트 정보 섹션 */}
            <Card>
                             <CardHeader className="pb-3">
                 <CardTitle className="text-base">
                   에이전트 정보
                 </CardTitle>
                <CardDescription>
                  해당 업체의 에이전트 정보를 관리합니다
                </CardDescription>
              </CardHeader>
              <CardContent>
                <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                  {/* 에이전트명 */}
                  <FormField
                    control={form.control}
                    name="agentName"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>에이전트명</FormLabel>
                        <FormControl>
                          <Input placeholder="에이전트명 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 에이전트 전화번호 */}
                  <FormField
                    control={form.control}
                    name="agentPhone"
                    render={({ field }) => (
                      <FormItem>
                                                 <FormLabel>에이전트 전화번호</FormLabel>
                        <FormControl>
                          <Input placeholder="에이전트 전화번호 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 에이전트 이메일 */}
                  <FormField
                    control={form.control}
                    name="agentEmail"
                    render={({ field }) => (
                      <FormItem className="md:col-span-2">
                                                 <FormLabel>에이전트 이메일</FormLabel>
                        <FormControl>
                          <Input type="email" placeholder="에이전트 이메일 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />
                </div>
              </CardContent>
            </Card>

            {/* 대표자 정보 섹션 */}
            <Card>
                             <CardHeader className="pb-3">
                 <CardTitle className="text-base">
                   대표자 정보
                 </CardTitle>
                <CardDescription>
                  업체 대표자의 정보를 관리합니다
                </CardDescription>
              </CardHeader>
              <CardContent>
                <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                  {/* 대표자명 */}
                  <FormField
                    control={form.control}
                    name="representativeName"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>대표자명</FormLabel>
                        <FormControl>
                          <Input placeholder="대표자명 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 대표자 생년월일 */}
                  <FormField
                    control={form.control}
                    name="representativeBirth"
                    render={({ field }) => (
                      <FormItem>
                        <FormLabel>대표자 생년월일</FormLabel>
                        <FormControl>
                          <Input placeholder="YYYY-MM-DD" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 대표자 전화번호 */}
                  <FormField
                    control={form.control}
                    name="representativePhone"
                    render={({ field }) => (
                      <FormItem>
                                                 <FormLabel>대표자 전화번호</FormLabel>
                        <FormControl>
                          <Input placeholder="대표자 전화번호 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />

                  {/* 대표자 이메일 */}
                  <FormField
                    control={form.control}
                    name="representativeEmail"
                    render={({ field }) => (
                      <FormItem>
                                                 <FormLabel>대표자 이메일</FormLabel>
                        <FormControl>
                          <Input type="email" placeholder="대표자 이메일 입력" {...field} />
                        </FormControl>
                        <FormMessage />
                      </FormItem>
                    )}
                  />
                </div>
              </CardContent>
            </Card>

            <SheetFooter className="gap-2 pt-2 sm:space-x-0">
              <SheetClose asChild>
                <Button type="button" variant="outline">
                  취소
                </Button>
              </SheetClose>
              <Button disabled={isPending}>
                {isPending && (
                  <Loader className="mr-2 h-4 w-4 animate-spin" aria-hidden="true" />
                )}
                저장
              </Button>
            </SheetFooter>
          </form>
        </Form>
      </SheetContent>
    </Sheet>
  )
}