import { Building2, Package, DollarSign, Calendar, FileText } from 'lucide-react'
import { formatDate } from '@/lib/utils'

interface GeneralContractInfoHeaderProps {
  contract: {
    id: number
    contractNumber: string
    revision: number
    status: string
    category: string
    type: string
    name: string
    vendorName?: string
    vendorCode?: string
    startDate: string
    endDate: string
    validityEndDate: string
    contractAmount?: string
    currency?: string
    registeredAt: string
    signedAt?: string
    linkedRfqOrItb?: string
    linkedBidNumber?: string
    linkedPoNumber?: string
  }
}

const statusLabels = {
  'Draft': '임시저장',
  'Request to Review': '조건검토요청',
  'Confirm to Review': '조건검토완료',
  'Contract Accept Request': '계약승인요청',
  'Complete the Contract': '계약체결',
  'Reject to Accept Contract': '계약승인거절',
  'Contract Delete': '계약폐기',
  'PCR Request': 'PCR요청',
  'VO Request': 'VO요청',
  'PCR Accept': 'PCR승인',
  'PCR Reject': 'PCR거절'
}

const categoryLabels = {
  '단가계약': '단가계약',
  '일반계약': '일반계약',
  '매각계약': '매각계약'
}

const typeLabels = {
  'UP': '자재단가계약',
  'LE': '임대차계약',
  'IL': '개별운송계약',
  'AL': '연간운송계약',
  'OS': '외주용역계약',
  'OW': '도급계약',
  'LO': 'LOI',
  'FA': 'FA',
  'SC': '납품합의계약',
  'OF': '클레임상계계약',
  'AW': '사전작업합의',
  'AD': '사전납품합의',
  'SG': '임치(물품보관)계약',
  'SR': '폐기물매각계약',
  'SP': 'S-PEpC'
}

export function GeneralContractInfoHeader({ contract }: GeneralContractInfoHeaderProps) {
  return (
    <div className="bg-white border rounded-lg p-6 mb-6 shadow-sm">
      {/* 3개 섹션을 Grid로 배치 - 각 섹션이 동일한 width로 꽉 채움 */}
      <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
        {/* 왼쪽 섹션: 계약 기본 정보 */}
        <div className="w-full space-y-4">
          {/* 계약번호 */}
          <div className="mb-4">
            <div className="flex items-center gap-2 text-sm text-gray-500 mb-2">
              <FileText className="w-4 h-4" />
              <span>계약번호 (Rev.)</span>
            </div>
            <div className="font-mono font-medium text-gray-900">
              {contract.contractNumber} (Rev.{contract.revision})
            </div>
          </div>

          {/* 계약명 */}
          <div className="mb-4">
            <div className="flex items-center gap-2 text-sm text-gray-500 mb-2">
              <Package className="w-4 h-4" />
              <span>계약명</span>
            </div>
            <div className="font-medium text-gray-900">{contract.name}</div>
          </div>

          {/* 협력업체 */}
            <div className="mb-4">
              <div className="flex items-center gap-2 text-sm text-gray-500 mb-2">
                <Building2 className="w-4 h-4" />
                <span>협력업체</span>
              </div>
              <div className="font-medium text-gray-900">
                {contract.vendorName || '협력업체 미선택'}
                {contract.vendorCode && (
                  <span className="text-sm text-gray-500 ml-2">({contract.vendorCode})</span>
                )}
              </div>
            </div>


          {/* 계약금액 */}
          {contract.contractAmount && (
            <div className="mb-4">
              <div className="flex items-center gap-2 text-sm text-gray-500 mb-2">
                <DollarSign className="w-4 h-4" />
                <span>계약금액</span>
              </div>
              <div className="font-semibold text-gray-900">
                {new Intl.NumberFormat('ko-KR', {
                  style: 'currency',
                  currency: contract.currency || 'KRW',
                }).format(Number(contract.contractAmount))}
              </div>
            </div>
          )}
        </div>

        {/* 가운데 섹션: 계약 분류 정보 */}
        <div className="w-full border-l border-gray-100 pl-6">
          <div className="space-y-3">
            <div className="flex flex-col gap-1">
              <span className="text-gray-500 text-sm">계약상태</span>
              <span className="font-medium">{statusLabels[contract.status as keyof typeof statusLabels] || contract.status}</span>
            </div>
           
            <div className="flex flex-col gap-1">
              <span className="text-gray-500 text-sm">계약구분</span>
              <span className="font-medium">{categoryLabels[contract.category as keyof typeof categoryLabels] || contract.category}</span>
            </div>

            <div className="flex flex-col gap-1">
              <span className="text-gray-500 text-sm">계약종류</span>
              <span className="font-medium">{typeLabels[contract.type as keyof typeof typeLabels] || contract.type}</span>
            </div>

            <div className="flex flex-col gap-1">
              <span className="text-gray-500 text-sm">통화</span>
              <span className="font-mono font-medium">{contract.currency || 'KRW'}</span>
            </div>
          </div>
        </div>

        {/* 오른쪽 섹션: 일정 및 연계 정보 */}
        <div className="w-full border-l border-gray-100 pl-6">
          <div className="flex items-center gap-2 mb-3 text-sm text-gray-500">
            <Calendar className="w-4 h-4" />
            <span>일정 및 연계 정보</span>
          </div>
          <div className="space-y-3">
            <div>
              <span className="text-gray-500 text-sm">계약기간</span>
              <div className="font-medium">
                {formatDate(contract.startDate, 'KR')} ~ {formatDate(contract.endDate, 'KR')}
              </div>
            </div>
            
            <div>
              <span className="text-gray-500 text-sm">계약 유효기간</span>
              <div className="font-medium">{formatDate(contract.validityEndDate, 'KR')}</div>
            </div>

            {contract.signedAt && (
              <div>
                <span className="text-gray-500 text-sm">계약체결일</span>
                <div className="font-medium">{formatDate(contract.signedAt, 'KR')}</div>
              </div>
            )}

            {contract.registeredAt && (
              <div>
                <span className="text-gray-500 text-sm">등록일</span>
                <div className="font-medium">{formatDate(contract.registeredAt, 'KR')}</div>
              </div>
            )}

            {(contract.linkedRfqOrItb || contract.linkedBidNumber || contract.linkedPoNumber) && (
              <div className="space-y-2">
                <span className="text-gray-500 text-sm font-medium">연계 정보</span>
                {contract.linkedRfqOrItb && (
                  <div>
                    <span className="text-gray-500 text-xs">연계 견적/입찰번호</span>
                    <div className="font-medium text-sm">{contract.linkedRfqOrItb}</div>
                  </div>
                )}
                {contract.linkedBidNumber && (
                  <div>
                    <span className="text-gray-500 text-xs">연계 BID번호</span>
                    <div className="font-medium text-sm">{contract.linkedBidNumber}</div>
                  </div>
                )}
                {contract.linkedPoNumber && (
                  <div>
                    <span className="text-gray-500 text-xs">연계 PO번호</span>
                    <div className="font-medium text-sm">{contract.linkedPoNumber}</div>
                  </div>
                )}
              </div>
            )}
          </div>
        </div>
      </div>
    </div>
  )
}