"use client"

import * as React from "react"
import { useEffect, useState } from "react"
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import { Skeleton } from "@/components/ui/skeleton"
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table"
import { toast } from "sonner"

// Lucide 아이콘
import { Plus, Minus } from "lucide-react"

import { ProcurementRfqsView } from "@/db/schema"
import { fetchVendorQuotations, fetchQuotationItems } from "@/lib/procurement-rfqs/services"
import { formatCurrency, formatDate } from "@/lib/utils"

// 견적 정보 타입
interface VendorQuotation {
  id: number
  rfqId: number
  vendorId: number
  vendorName?: string | null
  quotationCode: string
  quotationVersion: number
  totalItemsCount: number
  subTotal: string
  taxTotal: string
  discountTotal: string
  totalPrice: string
  currency: string
  validUntil: string | Date  // 수정: string | Date 허용
  estimatedDeliveryDate: string | Date  // 수정: string | Date 허용
  paymentTermsCode: string
  paymentTermsDescription?: string | null
  incotermsCode: string
  incotermsDescription?: string | null
  incotermsDetail: string
  status: string
  remark: string
  rejectionReason: string
  submittedAt: string | Date  // 수정: string | Date 허용
  acceptedAt: string | Date  // 수정: string | Date 허용
  createdAt: string | Date  // 수정: string | Date 허용
  updatedAt: string | Date  // 수정: string | Date 허용
}

// 견적 아이템 타입
interface QuotationItem {
  id: number
  quotationId: number
  prItemId: number
  materialCode: string | null  // Changed from string to string | null
  materialDescription: string | null  // Changed from string to string | null
  quantity: string
  uom: string | null  // Changed assuming this might be null
  unitPrice: string
  totalPrice: string
  currency: string | null  // Changed from string to string | null
  vendorMaterialCode: string | null  // Changed from string to string | null
  vendorMaterialDescription: string | null  // Changed from string to string | null
  deliveryDate: Date | null  // Changed from string to string | null
  leadTimeInDays: number | null  // Changed from number to number | null
  taxRate: string | null  // Changed from string to string | null
  taxAmount: string | null  // Changed from string to string | null
  discountRate: string | null  // Changed from string to string | null
  discountAmount: string | null  // Changed from string to string | null
  remark: string | null  // Changed from string to string | null
  isAlternative: boolean | null  // Changed from boolean to boolean | null
  isRecommended: boolean | null  // Changed from boolean to boolean | null
}

interface VendorQuotationComparisonDialogProps {
  open: boolean
  onOpenChange: (open: boolean) => void
  selectedRfq: ProcurementRfqsView | null
}

export function VendorQuotationComparisonDialog({
  open,
  onOpenChange,
  selectedRfq,
}: VendorQuotationComparisonDialogProps) {
  const [isLoading, setIsLoading] = useState(false)
  const [quotations, setQuotations] = useState<VendorQuotation[]>([])
  const [quotationItems, setQuotationItems] = useState<Record<number, QuotationItem[]>>({})
  const [activeTab, setActiveTab] = useState("summary")

  // 벤더별 접힘 상태 (true=접힘, false=펼침), 기본값: 접힘
  const [collapsedVendors, setCollapsedVendors] = useState<Record<number, boolean>>({})

  useEffect(() => {
    async function loadQuotationData() {
      if (!open || !selectedRfq?.id) return

      try {
        setIsLoading(true)
        // 1) 견적 목록
        const quotationsResult = await fetchVendorQuotations(selectedRfq.id)
        const rawQuotationsData = quotationsResult.data || []

        const quotationsData = rawQuotationsData.map((rawData): VendorQuotation => ({
          id: rawData.id,
          rfqId: rawData.rfqId,
          vendorId: rawData.vendorId,
          vendorName: rawData.vendorName || null,
          quotationCode: rawData.quotationCode || '',
          quotationVersion: rawData.quotationVersion || 0,
          totalItemsCount: rawData.totalItemsCount || 0,
          subTotal: rawData.subTotal || '0',
          taxTotal: rawData.taxTotal || '0',
          discountTotal: rawData.discountTotal || '0',
          totalPrice: rawData.totalPrice || '0',
          currency: rawData.currency || 'KRW',
          validUntil: rawData.validUntil || '',
          estimatedDeliveryDate: rawData.estimatedDeliveryDate || '',
          paymentTermsCode: rawData.paymentTermsCode || '',
          paymentTermsDescription: rawData.paymentTermsDescription || null,
          incotermsCode: rawData.incotermsCode || '',
          incotermsDescription: rawData.incotermsDescription || null,
          incotermsDetail: rawData.incotermsDetail || '',
          status: rawData.status || '',
          remark: rawData.remark || '',
          rejectionReason: rawData.rejectionReason || '',
          submittedAt: rawData.submittedAt || '',
          acceptedAt: rawData.acceptedAt || '',
          createdAt: rawData.createdAt || '',
          updatedAt: rawData.updatedAt || '',
        }));
        
        setQuotations(quotationsData);

        // 벤더별로 접힘 상태 기본값(true) 설정
        const collapsedInit: Record<number, boolean> = {}
        quotationsData.forEach((q) => {
          collapsedInit[q.id] = true
        })
        setCollapsedVendors(collapsedInit)

        // 2) 견적 아이템
        const qIds = quotationsData.map((q) => q.id)
        if (qIds.length > 0) {
          const itemsResult = await fetchQuotationItems(qIds)
          const itemsData = itemsResult.data || []

          const itemsByQuotation: Record<number, QuotationItem[]> = {}
          itemsData.forEach((item) => {
            if (!itemsByQuotation[item.quotationId]) {
              itemsByQuotation[item.quotationId] = []
            }
            itemsByQuotation[item.quotationId].push(item)
          })
          setQuotationItems(itemsByQuotation)
        }
      } catch (error) {
        console.error("견적 데이터 로드 오류:", error)
        toast.error("견적 데이터를 불러오는 데 실패했습니다")
      } finally {
        setIsLoading(false)
      }
    }

    loadQuotationData()
  }, [open, selectedRfq])

  // 견적 상태 -> 뱃지 색
  const getStatusBadgeVariant = (status: string) => {
    switch (status) {
      case "Submitted":
        return "default"
      case "Accepted":
        return "default"
      case "Rejected":
        return "destructive"
      case "Revised":
        return "destructive"
      default:
        return "secondary"
    }
  }

  // 모든 prItemId 모음
  const allItemIds = React.useMemo(() => {
    const itemSet = new Set<number>()
    Object.values(quotationItems).forEach((items) => {
      items.forEach((it) => itemSet.add(it.prItemId))
    })
    return Array.from(itemSet)
  }, [quotationItems])

  // 아이템 찾는 함수
  const findItemByQuotationId = (prItemId: number, qid: number) => {
    const items = quotationItems[qid] || []
    return items.find((i) => i.prItemId === prItemId)
  }

  // 접힘 상태 토글
  const toggleVendor = (qid: number) => {
    setCollapsedVendors((prev) => ({
      ...prev,
      [qid]: !prev[qid],
    }))
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      {/* 다이얼로그 자체는 max-h, max-w 설정, 내부에 스크롤 컨테이너를 둠 */}
      <DialogContent className="max-w-[90vw] lg:max-w-5xl max-h-[90vh]" style={{ maxWidth: '90vw', maxHeight: '90vh' }}>
        <DialogHeader>
          <DialogTitle>벤더 견적 비교</DialogTitle>
          <DialogDescription>
            {selectedRfq
              ? `RFQ ${selectedRfq.rfqCode} - ${selectedRfq.itemName || ""}`
              : ""}
          </DialogDescription>
        </DialogHeader>

        {isLoading ? (
          <div className="space-y-4">
            <Skeleton className="h-8 w-1/2" />
            <Skeleton className="h-48 w-full" />
          </div>
        ) : quotations.length === 0 ? (
          <div className="py-8 text-center text-muted-foreground">
            제출된(Submitted) 견적이 없습니다
          </div>
        ) : (
          <Tabs value={activeTab} onValueChange={setActiveTab} className="w-full">
            <TabsList className="grid w-full grid-cols-2">
              <TabsTrigger value="summary">견적 요약 비교</TabsTrigger>
              <TabsTrigger value="items">아이템별 비교</TabsTrigger>
            </TabsList>

            {/* ======================== 요약 비교 탭 ======================== */}
            <TabsContent value="summary" className="mt-4">
              {/* 
                table-fixed + 가로 너비를 크게 잡아줌 (예: w-[1200px]) 
                -> 컨테이너보다 넓으면 수평 스크롤 발생.
              */}
              <div className="border rounded-md max-h-[60vh] overflow-auto">
                <table className="table-fixed w-full border-collapse">
                  <thead className="sticky top-0 bg-background z-10">
                    <TableRow>
                      <TableHead
                        className="sticky left-0 top-0 z-20 bg-background p-2"
                      >
                        항목
                      </TableHead>
                      {quotations.map((q) => (
                        <TableHead key={q.id} className="p-2 text-center whitespace-nowrap">
                          {q.vendorName || `벤더 ID: ${q.vendorId}`}
                        </TableHead>
                      ))}
                    </TableRow>
                  </thead>
                  <tbody>
                    {/* 견적 상태 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        견적 상태
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`status-${q.id}`} className="p-2">
                          <Badge variant={getStatusBadgeVariant(q.status)}>
                            {q.status}
                          </Badge>
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 견적 버전 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        견적 버전
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`version-${q.id}`} className="p-2">
                          v{q.quotationVersion}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 총 금액 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        총 금액
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`total-${q.id}`} className="p-2 font-semibold">
                          {formatCurrency(Number(q.totalPrice), q.currency)}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 소계 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        소계
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`subtotal-${q.id}`} className="p-2">
                          {formatCurrency(Number(q.subTotal), q.currency)}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 세금 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        세금
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`tax-${q.id}`} className="p-2">
                          {formatCurrency(Number(q.taxTotal), q.currency)}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 할인 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        할인
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`discount-${q.id}`} className="p-2">
                          {formatCurrency(Number(q.discountTotal), q.currency)}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 통화 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        통화
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`currency-${q.id}`} className="p-2">
                          {q.currency}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 유효기간 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        유효 기간
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`valid-${q.id}`} className="p-2">
                          {formatDate(q.validUntil, "KR")}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 예상 배송일 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        예상 배송일
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`delivery-${q.id}`} className="p-2">
                          {formatDate(q.estimatedDeliveryDate, "KR")}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 지불 조건 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        지불 조건
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`payment-${q.id}`} className="p-2">
                          {q.paymentTermsDescription || q.paymentTermsCode}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 인코텀즈 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        인코텀즈
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`incoterms-${q.id}`} className="p-2">
                          {q.incotermsDescription || q.incotermsCode}
                          {q.incotermsDetail && (
                            <div className="text-xs text-muted-foreground mt-1">
                              {q.incotermsDetail}
                            </div>
                          )}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 제출일 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        제출일
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell key={`submitted-${q.id}`} className="p-2">
                          {formatDate(q.submittedAt, "KR")}
                        </TableCell>
                      ))}
                    </TableRow>

                    {/* 비고 */}
                    <TableRow>
                      <TableCell className="sticky left-0 z-10 bg-muted/30 p-2 font-medium">
                        비고
                      </TableCell>
                      {quotations.map((q) => (
                        <TableCell
                          key={`remark-${q.id}`}
                          className="p-2 whitespace-pre-wrap"
                        >
                          {q.remark || "-"}
                        </TableCell>
                      ))}
                    </TableRow>
                  </tbody>
                </table>
              </div>
            </TabsContent>

            {/* ====================== 아이템별 비교 탭 ====================== */}
            <TabsContent value="items" className="mt-4">
              {/* 컨테이너에 테이블 관련 클래스 직접 적용 */}
              <div className="border rounded-md max-h-[60vh] overflow-y-auto overflow-x-auto" >
                <div className="min-w-full w-max" style={{ maxWidth: '70vw' }}>
                  <table className="w-full border-collapse">
                    <thead className="sticky top-0 bg-background z-10">
                      {/* 첫 번째 헤더 행 */}
                      <tr>
                        {/* 첫 행: 자재(코드) 컬럼 */}
                        <th
                          rowSpan={2}
                          className="sticky left-0 top-0 z-20 p-2 border border-gray-200 text-left"
                          style={{ 
                            width: '250px', 
                            minWidth: '250px',
                            backgroundColor: 'white',
                          }}
                        >
                          자재 (코드)
                        </th>

                        {/* 벤더 헤더 (접힘/펼침) */}
                        {quotations.map((q, index) => {
                          const collapsed = collapsedVendors[q.id]
                          // 접힌 상태면 1칸, 펼친 상태면 6칸
                          return (
                            <th
                              key={q.id}
                              className="p-2 text-center whitespace-nowrap border border-gray-200"
                              colSpan={collapsed ? 1 : 6}
                              style={{
                                borderRight: index < quotations.length - 1 ? '1px solid #e5e7eb' : '',
                                backgroundColor: 'white',
                              }}
                            >
                              {/* + / - 버튼 */}
                              <div className="flex items-center gap-2 justify-center">
                                <Button
                                  variant="ghost"
                                  size="sm"
                                  className="h-7 w-7 p-1"
                                  onClick={() => toggleVendor(q.id)}
                                >
                                  {collapsed ? <Plus size={16} /> : <Minus size={16} />}
                                </Button>
                                <span>{q.vendorName || `벤더 ID: ${q.vendorId}`}</span>
                              </div>
                            </th>
                          )
                        })}
                      </tr>

                      {/* 두 번째 헤더 행 - 하위 컬럼들 */}
                      <tr className="border-b border-b-gray-200">
                        {/* 펼쳐진 벤더의 하위 컬럼들만 표시 */}
                        {quotations.flatMap((q, qIndex) => {
                          // 접힌 상태면 추가 헤더 없음
                          if (collapsedVendors[q.id]) {
                            return [
                              <th 
                                key={`${q.id}-collapsed`} 
                                className="p-2 text-center whitespace-nowrap border border-gray-200"
                                style={{ backgroundColor: 'white' }}
                              >
                                총액
                              </th>
                            ];
                          }
                          
                          // 펼친 상태면 6개 컬럼 표시
                          const columns = [
                            { key: 'unitprice', label: '단가' },
                            { key: 'totalprice', label: '총액' },
                            { key: 'tax', label: '세금' },
                            { key: 'discount', label: '할인' },
                            { key: 'leadtime', label: '리드타임' },
                            { key: 'alternative', label: '대체품' },
                          ];
                          
                          return columns.map((col, colIndex) => {
                            const isFirstInGroup = colIndex === 0;
                            const isLastInGroup = colIndex === columns.length - 1;
                            
                            return (
                              <th
                                key={`${q.id}-${col.key}`}
                                className={`p-2 text-center whitespace-nowrap border border-gray-200 ${
                                  isFirstInGroup ? 'border-l border-l-gray-200' : ''
                                } ${
                                  isLastInGroup ? 'border-r border-r-gray-200' : ''
                                }`}
                                style={{ backgroundColor: 'white' }}
                              >
                                {col.label}
                              </th>
                            );
                          });
                        })}
                      </tr>
                    </thead>

                    {/* 테이블 바디 */}
                    <tbody>
                      {allItemIds.map((itemId) => {
                        // 자재 기본 정보는 첫 번째 벤더 아이템 기준
                        const firstQid = quotations[0]?.id
                        const sampleItem = firstQid
                          ? findItemByQuotationId(itemId, firstQid)
                          : undefined

                        return (
                          <tr key={itemId} className="border-b border-gray-100">
                            {/* 자재 (코드) 셀 */}
                            <td
                              className="sticky left-0 z-10 p-2 align-top border-r border-gray-100"
                              style={{ 
                                width: '250px', 
                                minWidth: '250px',
                                backgroundColor: 'white',
                              }}
                            >
                              {sampleItem?.materialDescription || sampleItem?.materialCode || ""}
                              {sampleItem && (
                                <div className="text-xs text-muted-foreground mt-1">
                                  코드: {sampleItem.materialCode} | 수량:{" "}
                                  {sampleItem.quantity} {sampleItem.uom}
                                </div>
                              )}
                            </td>

                            {/* 벤더별 아이템 데이터 */}
                            {quotations.flatMap((q, qIndex) => {
                              const collapsed = collapsedVendors[q.id]
                              const itemData = findItemByQuotationId(itemId, q.id)
                              
                              // 접힌 상태면 총액만 표시
                              if (collapsed) {
                                return [
                                  <td
                                    key={`${q.id}-collapsed`}
                                    className="p-2 text-center text-sm font-medium whitespace-nowrap border-r border-gray-100"
                                  >
                                    {itemData
                                      ? formatCurrency(Number(itemData.totalPrice), itemData.currency)
                                      : "N/A"}
                                  </td>
                                ];
                              }
                              
                              // 펼친 상태 - 아이템 없음
                              if (!itemData) {
                                return [
                                  <td
                                    key={`${q.id}-empty`}
                                    colSpan={6}
                                    className="p-2 text-center text-sm border-r border-gray-100"
                                  >
                                    없음
                                  </td>
                                ];
                              }
                              
                              // 펼친 상태 - 모든 컬럼 표시
                              const columns = [
                                { key: 'unitprice', render: () => formatCurrency(Number(itemData.unitPrice), itemData.currency), align: 'right' },
                                { key: 'totalprice', render: () => formatCurrency(Number(itemData.totalPrice), itemData.currency), align: 'right', bold: true },
                                { key: 'tax', render: () => itemData.taxRate ? `${itemData.taxRate}% (${formatCurrency(Number(itemData.taxAmount), itemData.currency)})` : "-", align: 'right' },
                                { key: 'discount', render: () => itemData.discountRate ? `${itemData.discountRate}% (${formatCurrency(Number(itemData.discountAmount), itemData.currency)})` : "-", align: 'right' },
                                { key: 'leadtime', render: () => itemData.leadTimeInDays ? `${itemData.leadTimeInDays}일` : "-", align: 'center' },
                                { key: 'alternative', render: () => itemData.isAlternative ? "대체품" : "표준품", align: 'center' },
                              ];
                              
                              return columns.map((col, colIndex) => {
                                const isFirstInGroup = colIndex === 0;
                                const isLastInGroup = colIndex === columns.length - 1;
                                
                                return (
                                  <td
                                    key={`${q.id}-${col.key}`}
                                    className={`p-2 text-${col.align} ${col.bold ? 'font-semibold' : ''} ${
                                      isFirstInGroup ? 'border-l border-l-gray-100' : ''
                                    } ${
                                      isLastInGroup ? 'border-r border-r-gray-100' : 'border-r border-gray-100'
                                    }`}
                                  >
                                    {col.render()}
                                  </td>
                                );
                              });
                            })}
                          </tr>
                        );
                      })}

                      {/* 아이템이 전혀 없는 경우 */}
                      {allItemIds.length === 0 && (
                        <tr>
                          <td
                            colSpan={100} // 충분히 큰 수로 설정해 모든 컬럼을 커버
                            className="text-center p-4 border border-gray-100"
                          >
                            아이템 정보가 없습니다
                          </td>
                        </tr>
                      )}
                    </tbody>
                  </table>
                </div>
              </div>
            </TabsContent>
          </Tabs>
        )}

        <DialogFooter>
          <Button variant="outline" onClick={() => onOpenChange(false)}>
            닫기
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  )
}