import React, { useState } from 'react';
import { exportMaterialsToExcel, createExcelBlob } from '../../../utils/excelExport';
import api from '../../../api';
import { FilterableHeader, MaterialTable } from '../shared';

const PipeMaterialsView = ({ 
  materials, 
  selectedMaterials, 
  setSelectedMaterials,
  userRequirements,
  setUserRequirements,
  purchasedMaterials,
  onPurchasedMaterialsUpdate,
  updateMaterial, // 자재 업데이트 함수
  fileId,
  jobNo,
  user,
  onNavigate 
}) => {
  const [sortConfig, setSortConfig] = useState({ key: null, direction: 'asc' });
  const [columnFilters, setColumnFilters] = useState({});
  const [showFilterDropdown, setShowFilterDropdown] = useState(null);
  const [brandInputs, setBrandInputs] = useState({}); // 브랜드 입력 상태
  const [savingBrand, setSavingBrand] = useState({}); // 브랜드 저장 중 상태
  const [savingRequest, setSavingRequest] = useState({}); // 추가요구사항 저장 중 상태
  const [savedBrands, setSavedBrands] = useState({}); // 저장된 브랜드 상태
  const [savedRequests, setSavedRequests] = useState({}); // 저장된 추가요구사항 상태
  const [editingBrand, setEditingBrand] = useState({}); // 브랜드 편집 모드
  const [editingRequest, setEditingRequest] = useState({}); // 추가요구사항 편집 모드

  // 컴포넌트 마운트 시 저장된 데이터 로드
  React.useEffect(() => {
    const loadSavedData = () => {
      const savedBrandsData = {};
      const savedRequestsData = {};
      
      materials.forEach(material => {
        // 백엔드에서 가져온 데이터가 있으면 저장된 상태로 설정
        if (material.brand && material.brand.trim()) {
          savedBrandsData[material.id] = material.brand.trim();
        }
        if (material.user_requirement && material.user_requirement.trim()) {
          savedRequestsData[material.id] = material.user_requirement.trim();
        }
      });
      
      setSavedBrands(savedBrandsData);
      setSavedRequests(savedRequestsData);
    };

    if (materials && materials.length > 0) {
      loadSavedData();
    } else {
      setSavedBrands({});
      setSavedRequests({});
    }
  }, [materials]);

  // 브랜드 저장 함수
  const handleSaveBrand = async (materialId, brand) => {
    if (!brand.trim()) return;
    
    setSavingBrand(prev => ({ ...prev, [materialId]: true }));
    try {
      await api.patch(`/materials/${materialId}/brand`, { brand: brand.trim() });
      setSavedBrands(prev => ({ ...prev, [materialId]: brand.trim() }));
      setEditingBrand(prev => ({ ...prev, [materialId]: false }));
      setBrandInputs(prev => ({ ...prev, [materialId]: '' }));
      
      if (updateMaterial) {
        updateMaterial(materialId, { brand: brand.trim() });
      }
    } catch (error) {
      console.error('브랜드 저장 실패:', error);
      alert('브랜드 저장에 실패했습니다.');
    } finally {
      setSavingBrand(prev => ({ ...prev, [materialId]: false }));
    }
  };

  // 브랜드 편집 시작
  const handleEditBrand = (materialId, currentBrand) => {
    setEditingBrand(prev => ({ ...prev, [materialId]: true }));
    setBrandInputs(prev => ({ ...prev, [materialId]: currentBrand || '' }));
  };

  // 추가요구사항 저장 함수
  const handleSaveRequest = async (materialId, request) => {
    setSavingRequest(prev => ({ ...prev, [materialId]: true }));
    try {
      await api.patch(`/materials/${materialId}/user-requirement`, { 
        user_requirement: request.trim() 
      });
      setSavedRequests(prev => ({ ...prev, [materialId]: request.trim() }));
      setEditingRequest(prev => ({ ...prev, [materialId]: false }));
      setUserRequirements(prev => ({ ...prev, [materialId]: '' }));
      
      if (updateMaterial) {
        updateMaterial(materialId, { user_requirement: request.trim() });
      }
    } catch (error) {
      console.error('추가요구사항 저장 실패:', error);
      alert('추가요구사항 저장에 실패했습니다.');
    } finally {
      setSavingRequest(prev => ({ ...prev, [materialId]: false }));
    }
  };

  // 추가요구사항 편집 시작
  const handleEditRequest = (materialId, currentRequest) => {
    setEditingRequest(prev => ({ ...prev, [materialId]: true }));
    setUserRequirements(prev => ({ ...prev, [materialId]: currentRequest || '' }));
  };

  // 파이프 구매 수량 계산 (백엔드 그룹화 데이터 활용)
  const calculatePipePurchase = (material) => {
    const pipeDetails = material.pipe_details || {};
    
    // 백엔드에서 이미 그룹화된 데이터 사용
    let pipeCount = 1; // 기본값
    let totalBomLengthMm = 0;
    
    if (pipeDetails.pipe_count && pipeDetails.total_length_mm) {
      // 백엔드에서 그룹화된 데이터 사용
      pipeCount = pipeDetails.pipe_count; // 실제 단관 개수
      totalBomLengthMm = pipeDetails.total_length_mm; // 이미 합산된 총 길이
    } else {
      // 개별 파이프 데이터인 경우
      pipeCount = material.quantity || 1;
      
      // 길이 정보 우선순위: length_mm > length > pipe_details.length_mm
      let singlePipeLengthMm = 0;
      if (material.length_mm) {
        singlePipeLengthMm = material.length_mm;
      } else if (material.length) {
        singlePipeLengthMm = material.length * 1000; // m를 mm로 변환
      } else if (pipeDetails.length_mm) {
        singlePipeLengthMm = pipeDetails.length_mm;
      }
      
      totalBomLengthMm = singlePipeLengthMm * pipeCount;
    }
    
    // 여유분 포함 계산: 각 단관당 2mm 여유분 추가
    const allowancePerPipe = 2; // mm
    const totalAllowanceMm = allowancePerPipe * pipeCount;
    const totalLengthWithAllowance = totalBomLengthMm + totalAllowanceMm; // mm
    
    // 6,000mm(6m) 표준 길이로 필요한 본수 계산 (올림)
    const standardLengthMm = 6000; // mm
    const requiredStandardPipes = Math.ceil(totalLengthWithAllowance / standardLengthMm);
    
    return {
      pipeCount, // 단관 개수
      totalBomLengthMm, // 총 BOM 길이 (mm)
      totalLengthWithAllowance, // 여유분 포함 총 길이 (mm)
      totalLengthM: totalLengthWithAllowance / 1000, // 총 길이 (m)
      requiredStandardPipes, // 필요한 표준 파이프 본수
      standardLengthMm,
      allowancePerPipe,
      totalAllowanceMm,
      // 디버깅용 정보
      isGrouped: !!(pipeDetails.pipe_count && pipeDetails.total_length_mm)
    };
  };

  // 파이프 정보 파싱 (개선된 로직)
  const parsePipeInfo = (material) => {
    const calc = calculatePipePurchase(material);
    const pipeDetails = material.pipe_details || {};
    
    // User 요구사항 추출 (분류기에서 제공된 정보)
    const userRequirements = material.user_requirements || [];
    const userReqText = userRequirements.length > 0 ? userRequirements.join(', ') : '-';
    
    return {
      // Type 컬럼 제거 (모두 PIPE로 동일)
      type: pipeDetails.manufacturing_method || 'SMLS', // Subtype을 Type으로 변경
      size: material.size_spec || '-',
      schedule: pipeDetails.schedule || material.schedule || '-',
      grade: material.full_material_grade || material.material_grade || '-',
      userRequirements: userReqText, // User 요구사항
      length: calc.totalLengthWithAllowance, // 여유분 포함 총 길이 (mm)
      quantity: calc.pipeCount, // 단관 개수
      unit: `${calc.requiredStandardPipes}본`, // 6m 표준 파이프 필요 본수
      details: calc,
      isPipe: true
    };
  };


  // 정렬 처리
  const handleSort = (key) => {
    let direction = 'asc';
    if (sortConfig.key === key && sortConfig.direction === 'asc') {
      direction = 'desc';
    }
    setSortConfig({ key, direction });
  };

  // 필터링된 및 정렬된 자재 목록
  const getFilteredAndSortedMaterials = () => {
    let filtered = materials.filter(material => {
      return Object.entries(columnFilters).every(([key, filterValue]) => {
        if (!filterValue) return true;
        const info = parsePipeInfo(material);
        const value = info[key]?.toString().toLowerCase() || '';
        return value.includes(filterValue.toLowerCase());
      });
    });

    if (sortConfig.key) {
      filtered.sort((a, b) => {
        const aInfo = parsePipeInfo(a);
        const bInfo = parsePipeInfo(b);
        const aValue = aInfo[sortConfig.key] || '';
        const bValue = bInfo[sortConfig.key] || '';
        
        if (sortConfig.direction === 'asc') {
          return aValue > bValue ? 1 : -1;
        } else {
          return aValue < bValue ? 1 : -1;
        }
      });
    }

    return filtered;
  };

  // 전체 선택/해제 (구매된 자재 제외)
  const handleSelectAll = () => {
    const filteredMaterials = getFilteredAndSortedMaterials();
    const selectableMaterials = filteredMaterials.filter(m => !purchasedMaterials.has(m.id));
    
    if (selectedMaterials.size === selectableMaterials.length) {
      setSelectedMaterials(new Set());
    } else {
      setSelectedMaterials(new Set(selectableMaterials.map(m => m.id)));
    }
  };

  // 개별 선택 (구매된 자재는 선택 불가)
  const handleMaterialSelect = (materialId) => {
    if (purchasedMaterials.has(materialId)) {
      return; // 구매된 자재는 선택 불가
    }
    
    const newSelected = new Set(selectedMaterials);
    if (newSelected.has(materialId)) {
      newSelected.delete(materialId);
    } else {
      newSelected.add(materialId);
    }
    setSelectedMaterials(newSelected);
  };

  // 엑셀 내보내기
  const handleExportToExcel = async () => {
    const selectedMaterialsData = materials.filter(m => selectedMaterials.has(m.id));
    if (selectedMaterialsData.length === 0) {
      alert('내보낼 자재를 선택해주세요.');
      return;
    }

    const timestamp = new Date().toISOString().slice(0, 19).replace(/:/g, '-');
    const excelFileName = `PIPE_Materials_${timestamp}.xlsx`;

    // 사용자 요구사항 포함
    const dataWithRequirements = selectedMaterialsData.map(material => ({
      ...material,
      user_requirement: savedRequests[material.id] || userRequirements[material.id] || ''
    }));

    try {
      console.log('🔄 파이프 엑셀 내보내기 시작 - 새로운 방식');
      
      // 1. 먼저 클라이언트에서 엑셀 파일 생성
      console.log('📊 엑셀 Blob 생성 중...', dataWithRequirements.length, '개 자료');
      const excelBlob = await createExcelBlob(dataWithRequirements, excelFileName, {
        category: 'PIPE',
        filename: excelFileName,
        uploadDate: new Date().toLocaleDateString()
      });
      console.log('✅ 엑셀 Blob 생성 완료:', excelBlob.size, 'bytes');

      // 2. 구매신청 생성
      const allMaterialIds = selectedMaterialsData.map(m => m.id);
      const response = await api.post('/purchase-request/create', {
        file_id: fileId,
        job_no: jobNo,
        category: 'PIPE',
        material_ids: allMaterialIds,
        materials_data: dataWithRequirements.map(m => ({
          material_id: m.id,
          description: m.original_description,
          category: m.classified_category,
          size: m.size_inch || m.size_spec,
          schedule: m.schedule,
          material_grade: m.material_grade || m.full_material_grade,
          quantity: m.quantity,
          unit: m.unit,
          user_requirement: userRequirements[m.id] || ''
        }))
      });

      if (response.data.success) {
        console.log(`✅ 구매신청 완료: ${response.data.request_no}, request_id: ${response.data.request_id}`);
        
        // 3. 생성된 엑셀 파일을 서버에 업로드
        console.log('📤 서버에 엑셀 파일 업로드 중...');
        const formData = new FormData();
        formData.append('excel_file', excelBlob, excelFileName);
        formData.append('request_id', response.data.request_id);
        formData.append('category', 'PIPE');
        
        const uploadResponse = await api.post('/purchase-request/upload-excel', formData, {
          headers: {
            'Content-Type': 'multipart/form-data',
          },
        });
        console.log('✅ 엑셀 업로드 완료:', uploadResponse.data);

        if (onPurchasedMaterialsUpdate) {
          onPurchasedMaterialsUpdate(allMaterialIds);
        }
      }

      // 4. 클라이언트 다운로드
      const url = window.URL.createObjectURL(excelBlob);
      const link = document.createElement('a');
      link.href = url;
      link.download = excelFileName;
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      window.URL.revokeObjectURL(url);

      alert(`구매신청 ${response.data?.request_no || ''}이 생성되고 엑셀 파일이 저장되었습니다.`);
    } catch (error) {
      console.error('엑셀 저장 또는 구매신청 실패:', error);
      // 실패 시에도 클라이언트 다운로드는 진행
      exportMaterialsToExcel(dataWithRequirements, excelFileName, {
        category: 'PIPE',
        filename: excelFileName,
        uploadDate: new Date().toLocaleDateString()
      });
      alert('엑셀 파일은 다운로드되었지만 구매신청 생성에 실패했습니다.');
    }

    // 선택 해제
    setSelectedMaterials(new Set());
  };

  const filteredMaterials = getFilteredAndSortedMaterials();

  // 필터 헤더 컴포넌트
  const FilterableHeader = ({ sortKey, filterKey, children }) => (
    <div className="filterable-header" style={{ position: 'relative' }}>
      <div style={{ display: 'flex', alignItems: 'center', gap: '8px' }}>
        <span
          onClick={() => handleSort(sortKey)}
          style={{ cursor: 'pointer', flex: 1 }}
        >
          {children}
          {sortConfig.key === sortKey && (
            <span style={{ marginLeft: '4px' }}>
              {sortConfig.direction === 'asc' ? '↑' : '↓'}
            </span>
          )}
        </span>
        <button
          onClick={() => setShowFilterDropdown(showFilterDropdown === filterKey ? null : filterKey)}
          style={{
            background: 'none',
            border: 'none',
            cursor: 'pointer',
            padding: '2px',
            fontSize: '12px',
            color: '#6b7280'
          }}
        >
          🔍
        </button>
      </div>
      {showFilterDropdown === filterKey && (
        <div style={{
          position: 'absolute',
          top: '100%',
          left: 0,
          background: 'white',
          border: '1px solid #e2e8f0',
          borderRadius: '6px',
          padding: '8px',
          boxShadow: '0 4px 6px rgba(0, 0, 0, 0.1)',
          zIndex: 1000,
          minWidth: '150px'
        }}>
          <input
            type="text"
            placeholder={`Filter ${children}...`}
            value={columnFilters[filterKey] || ''}
            onChange={(e) => setColumnFilters({
              ...columnFilters,
              [filterKey]: e.target.value
            })}
            style={{
              width: '100%',
              padding: '4px 8px',
              border: '1px solid #d1d5db',
              borderRadius: '4px',
              fontSize: '12px'
            }}
            autoFocus
          />
        </div>
      )}
    </div>
  );

  return (
    <div style={{ padding: '32px' }}>
      {/* 헤더 */}
      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '24px' }}>
        <div>
          <h3 style={{ 
            fontSize: '24px', 
            fontWeight: '700', 
            color: '#0f172a', 
            margin: '0 0 8px 0' 
          }}>
            Pipe Materials
          </h3>
          <p style={{ 
            fontSize: '14px', 
            color: '#64748b', 
            margin: 0 
          }}>
            {filteredMaterials.length} items • {selectedMaterials.size} selected
          </p>
        </div>
        
        <div style={{ display: 'flex', gap: '12px' }}>
          <button
            onClick={handleSelectAll}
            style={{
              background: 'white',
              color: '#6b7280',
              border: '1px solid #d1d5db',
              borderRadius: '8px',
              padding: '10px 16px',
              cursor: 'pointer',
              fontSize: '14px',
              fontWeight: '500'
            }}
          >
            {selectedMaterials.size === filteredMaterials.length ? 'Deselect All' : 'Select All'}
          </button>
          
          <button
            onClick={handleExportToExcel}
            disabled={selectedMaterials.size === 0}
            style={{
              background: selectedMaterials.size > 0 ? 'linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%)' : '#e5e7eb',
              color: selectedMaterials.size > 0 ? 'white' : '#9ca3af',
              border: 'none',
              borderRadius: '8px',
              padding: '10px 16px',
              cursor: selectedMaterials.size > 0 ? 'pointer' : 'not-allowed',
              fontSize: '14px',
              fontWeight: '500'
            }}
          >
            Export to Excel ({selectedMaterials.size})
          </button>
        </div>
      </div>

      {/* 테이블 */}
      <div style={{ 
        background: 'white', 
        borderRadius: '12px', 
        overflow: 'auto',
        boxShadow: '0 1px 3px rgba(0, 0, 0, 0.1)',
        maxHeight: '600px'
      }}>
        {/* 테이블 내용 - 헤더와 본문이 함께 스크롤 */}
        <div style={{
          minWidth: '1200px'
        }}>
          {/* 헤더 */}
          <div style={{
            display: 'grid',
            gridTemplateColumns: '50px 120px 120px 120px 150px 200px 120px 100px 120px 300px',
            gap: '16px',
            padding: '16px',
            background: '#f8fafc',
            borderBottom: '1px solid #e2e8f0',
            fontSize: '14px',
            fontWeight: '600',
            color: '#374151',
            textAlign: 'center'
          }}>
          <div>
            <input
              type="checkbox"
              checked={(() => {
                const filteredMaterials = getFilteredAndSortedMaterials();
                const selectableMaterials = filteredMaterials.filter(m => !purchasedMaterials.has(m.id));
                return selectedMaterials.size === selectableMaterials.length && selectableMaterials.length > 0;
              })()}
              onChange={handleSelectAll}
              style={{ cursor: 'pointer' }}
            />
          </div>
          <FilterableHeader 
            sortKey="type" 
            filterKey="type"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Type
          </FilterableHeader>
          <FilterableHeader 
            sortKey="size" 
            filterKey="size"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Size
          </FilterableHeader>
          <FilterableHeader 
            sortKey="schedule" 
            filterKey="schedule"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Schedule
          </FilterableHeader>
          <FilterableHeader 
            sortKey="grade" 
            filterKey="grade"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Material Grade
          </FilterableHeader>
          <FilterableHeader 
            sortKey="userRequirements" 
            filterKey="userRequirements"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            User Requirements
          </FilterableHeader>
          <FilterableHeader 
            sortKey="length" 
            filterKey="length"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Length (MM)
          </FilterableHeader>
          <FilterableHeader 
            sortKey="quantity" 
            filterKey="quantity"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Quantity (EA)
          </FilterableHeader>
          <div>Purchase Unit</div>
          <div>Additional Request</div>
        </div>

          {/* 데이터 행들 */}
          <div>
          {filteredMaterials.map((material, index) => {
            const info = parsePipeInfo(material);
            const isSelected = selectedMaterials.has(material.id);
            const isPurchased = purchasedMaterials.has(material.id);
            
            return (
              <div
                key={material.id}
                style={{
                  display: 'grid',
                  gridTemplateColumns: '50px 120px 120px 120px 150px 200px 120px 100px 120px 300px',
                  gap: '16px',
                  padding: '16px',
                  borderBottom: index < filteredMaterials.length - 1 ? '1px solid #f1f5f9' : 'none',
                  background: isSelected ? '#eff6ff' : (isPurchased ? '#fef3c7' : 'white'),
                  transition: 'background 0.15s ease',
                  textAlign: 'center'
                }}
                onMouseEnter={(e) => {
                  if (!isSelected && !isPurchased) {
                    e.target.style.background = '#f8fafc';
                  }
                }}
                onMouseLeave={(e) => {
                  if (!isSelected && !isPurchased) {
                    e.target.style.background = 'white';
                  }
                }}
              >
                <div>
                  <input
                    type="checkbox"
                    checked={isSelected}
                    onChange={() => handleMaterialSelect(material.id)}
                    disabled={isPurchased}
                    style={{ 
                      cursor: isPurchased ? 'not-allowed' : 'pointer',
                      opacity: isPurchased ? 0.5 : 1
                    }}
                  />
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937', fontWeight: '500' }}>
                  {info.type}
                  {isPurchased && (
                    <span style={{
                      marginLeft: '8px',
                      padding: '2px 6px',
                      background: '#fbbf24',
                      color: '#92400e',
                      borderRadius: '4px',
                      fontSize: '10px',
                      fontWeight: '500'
                    }}>
                      PURCHASED
                    </span>
                  )}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937' }}>
                  {info.size}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937' }}>
                  {info.schedule}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937' }}>
                  {info.grade}
                </div>
                <div style={{ 
                  fontSize: '14px', 
                  color: '#1f2937',
                  whiteSpace: 'nowrap',
                  overflow: 'hidden',
                  textOverflow: 'ellipsis'
                }}>
                  {info.userRequirements}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937' }}>
                  {Math.round(info.length).toLocaleString()}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937', fontWeight: '600', textAlign: 'right' }}>
                  {info.quantity}
                </div>
                <div style={{ fontSize: '14px', color: '#6b7280', fontWeight: '500' }}>
                  {info.unit}
                </div>
                <div style={{ display: 'flex', gap: '4px', alignItems: 'center' }}>
                  {!editingRequest[material.id] && savedRequests[material.id] ? (
                    // 저장된 상태 - 요구사항 표시 + 수정 버튼
                    <>
                      <div style={{
                        flex: 1,
                        padding: '6px',
                        border: '1px solid #e5e7eb',
                        borderRadius: '4px',
                        fontSize: '11px',
                        textAlign: 'center',
                        background: '#f9fafb',
                        color: '#374151'
                      }}>
                        {savedRequests[material.id]}
                      </div>
                      <button
                        onClick={() => handleEditRequest(material.id, savedRequests[material.id])}
                        disabled={isPurchased}
                        style={{
                          padding: '6px 8px',
                          border: 'none',
                          borderRadius: '4px',
                          background: isPurchased ? '#d1d5db' : '#f59e0b',
                          color: 'white',
                          fontSize: '10px',
                          cursor: isPurchased ? 'not-allowed' : 'pointer',
                          opacity: isPurchased ? 0.5 : 1,
                          minWidth: '40px'
                        }}
                      >
                        Edit
                      </button>
                    </>
                  ) : (
                    // 편집 상태 - 입력 필드 + 저장 버튼
                    <>
                      <input
                        type="text"
                        value={userRequirements[material.id] || ''}
                        onChange={(e) => setUserRequirements({
                          ...userRequirements,
                          [material.id]: e.target.value
                        })}
                        placeholder="Enter additional request..."
                        disabled={isPurchased}
                        style={{
                          flex: 1,
                          padding: '6px',
                          border: '1px solid #d1d5db',
                          borderRadius: '4px',
                          fontSize: '11px',
                          opacity: isPurchased ? 0.5 : 1,
                          cursor: isPurchased ? 'not-allowed' : 'text'
                        }}
                      />
                      <button
                        onClick={() => handleSaveRequest(material.id, userRequirements[material.id] || '')}
                        disabled={isPurchased || savingRequest[material.id]}
                        style={{
                          padding: '6px 8px',
                          border: 'none',
                          borderRadius: '4px',
                          background: isPurchased ? '#d1d5db' : '#10b981',
                          color: 'white',
                          fontSize: '10px',
                          cursor: isPurchased || savingRequest[material.id] ? 'not-allowed' : 'pointer',
                          opacity: isPurchased ? 0.5 : 1,
                          minWidth: '40px'
                        }}
                      >
                        {savingRequest[material.id] ? '...' : 'Save'}
                      </button>
                    </>
                  )}
                </div>
              </div>
            );
          })}
          </div>
        </div>
      </div>

      {filteredMaterials.length === 0 && (
        <div style={{
          textAlign: 'center',
          padding: '60px 20px',
          color: '#64748b'
        }}>
          <div style={{ fontSize: '18px', fontWeight: '600', marginBottom: '8px' }}>
            No Pipe Materials Found
          </div>
          <div style={{ fontSize: '14px' }}>
            {Object.keys(columnFilters).some(key => columnFilters[key]) 
              ? 'Try adjusting your filters' 
              : 'No pipe materials available in this BOM'}
          </div>
        </div>
      )}
    </div>
  );
};

export default PipeMaterialsView;
