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

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

  // 컴포넌트 마운트 시 저장된 데이터 로드
  React.useEffect(() => {
    const loadSavedData = () => {
      const savedRequestsData = {};
      
      materials.forEach(material => {
        if (material.user_requirement && material.user_requirement.trim()) {
          savedRequestsData[material.id] = material.user_requirement.trim();
        }
      });
      
      setSavedRequests(savedRequestsData);
    };

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

  // 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 || '' }));
  };

  const parseGasketInfo = (material) => {
    const qty = Math.round(material.quantity || 0);
    const purchaseQty = Math.ceil(qty * 1.05 / 5) * 5; // 5% 여유율 + 5의 배수
    
    const description = material.original_description || '';
    
    // 가스켓 타입 풀네임 매핑
    const gasketTypeMap = {
      'SWG': 'SPIRAL WOUND GASKET',
      'RTJ': 'RING TYPE JOINT',
      'FF': 'FULL FACE GASKET',
      'RF': 'RAISED FACE GASKET',
      'SHEET': 'SHEET GASKET',
      'O-RING': 'O-RING GASKET'
    };
    
    // 타입 추출 및 풀네임 변환
    let gasketType = '-';
    const typeMatch = description.match(/\b(SWG|RTJ|FF|RF|SHEET|O-RING)\b/i);
    if (typeMatch) {
      const shortType = typeMatch[1].toUpperCase();
      gasketType = gasketTypeMap[shortType] || shortType;
    }
    
    // 크기 정보 추출 (예: 1 1/2")
    let size = material.size_spec || material.size_inch || '-';
    if (size === '-') {
      const sizeMatch = description.match(/(\d+(?:\s+\d+\/\d+)?(?:\.\d+)?)\s*"/);
      if (sizeMatch) {
        size = sizeMatch[1] + '"';
      }
    }
    
    // 압력등급 추출
    let pressure = '-';
    const pressureMatch = description.match(/(\d+LB)/i);
    if (pressureMatch) {
      pressure = pressureMatch[1];
    }
    
    // 구조 정보 추출 (H/F/I/O)
    let structure = '-';
    if (description.includes('H/F/I/O')) {
      structure = 'H/F/I/O';
    }
    
    // 재질 상세 정보 추출 (SS304/GRAPHITE/SS304/SS304)
    let material_detail = '-';
    const materialMatch = description.match(/H\/F\/I\/O\s+([^,]+)/);
    if (materialMatch) {
      material_detail = materialMatch[1].trim();
      // 두께 정보 제거
      material_detail = material_detail.replace(/,?\s*\d+(?:\.\d+)?mm$/, '').trim();
    }
    
    // 두께 정보 추출
    let thickness = '-';
    const thicknessMatch = description.match(/(\d+(?:\.\d+)?)\s*mm/i);
    if (thicknessMatch) {
      thickness = thicknessMatch[1] + 'mm';
    }
    
    return {
      type: gasketType, // 풀네임으로 표시 (SPIRAL WOUND GASKET)
      size: size,
      pressure: pressure,
      structure: structure, // H/F/I/O
      material: material_detail, // SS304/GRAPHITE/SS304/SS304
      thickness: thickness,
      userRequirements: material.user_requirements?.join(', ') || '-',
      purchaseQuantity: purchaseQty,
      isGasket: 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 = parseGasketInfo(material);
        const value = info[key]?.toString().toLowerCase() || '';
        return value.includes(filterValue.toLowerCase());
      });
    });

    if (sortConfig && sortConfig.key) {
      filtered.sort((a, b) => {
        const aInfo = parseGasketInfo(a);
        const bInfo = parseGasketInfo(b);
        
        if (!aInfo || !bInfo) return 0;
        
        const aValue = aInfo[sortConfig.key];
        const bValue = bInfo[sortConfig.key];
        
        // 값이 없는 경우 처리
        if (aValue === undefined && bValue === undefined) return 0;
        if (aValue === undefined) return 1;
        if (bValue === undefined) return -1;
        
        // 숫자인 경우 숫자로 비교
        if (typeof aValue === 'number' && typeof bValue === 'number') {
          return sortConfig.direction === 'asc' ? aValue - bValue : bValue - aValue;
        }
        
        // 문자열로 비교
        const aStr = String(aValue).toLowerCase();
        const bStr = String(bValue).toLowerCase();
        
        if (sortConfig.direction === 'asc') {
          return aStr.localeCompare(bStr);
        } else {
          return bStr.localeCompare(aStr);
        }
      });
    }

    return filtered;
  };

  // 전체 선택/해제 (구매신청된 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 (구매신청된 자재는 선택 불가)
  const handleMaterialSelect = (materialId) => {
    if (purchasedMaterials.has(materialId)) {
      return; // 구매신청된 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 = `GASKET_Materials_${timestamp}.xlsx`;

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

    try {
      console.log('🔄 가스켓 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: 'GASKET',
        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: 'GASKET',
        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', 'GASKET');
        
        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: 'GASKET',
        filename: excelFileName,
        uploadDate: new Date().toLocaleDateString()
      });
      alert('엑셀 파일은 다운로드되었지만 구매신청 생성에 실패했습니다.');
    }
  };

  const filteredMaterials = getFilteredAndSortedMaterials();

  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' 
          }}>
            Gasket 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, #8b5cf6 0%, #7c3aed 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',
        maxHeight: '600px',
        boxShadow: '0 1px 3px rgba(0, 0, 0, 0.1)'
      }}>
        <div style={{ minWidth: '1400px' }}>
        {/* 헤더 */}
        <div style={{
          display: 'grid',
          gridTemplateColumns: '50px 250px 120px 100px 120px 200px 100px 180px 200px 120px',
          gap: '16px',
          padding: '16px',
          background: '#f8fafc',
          borderBottom: '1px solid #e2e8f0',
          fontSize: '14px',
          fontWeight: '600',
          color: '#374151',
          textAlign: 'center'
        }}>
          <div>
            <input
              type="checkbox"
              checked={(() => {
                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="pressure" 
            filterKey="pressure"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Pressure
          </FilterableHeader>
          <FilterableHeader 
            sortKey="structure" 
            filterKey="structure"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Structure
          </FilterableHeader>
          <FilterableHeader 
            sortKey="material" 
            filterKey="material"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Material
          </FilterableHeader>
          <FilterableHeader 
            sortKey="thickness" 
            filterKey="thickness"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Thickness
          </FilterableHeader>
          <div>User Requirements</div>
          <div>Additional Request</div>
          <FilterableHeader 
            sortKey="purchaseQuantity" 
            filterKey="purchaseQuantity"
            sortConfig={sortConfig}
            onSort={handleSort}
            columnFilters={columnFilters}
            onFilterChange={setColumnFilters}
            showFilterDropdown={showFilterDropdown}
            setShowFilterDropdown={setShowFilterDropdown}
          >
            Purchase Quantity
          </FilterableHeader>
        </div>

          {/* 데이터 행들 */}
          {filteredMaterials.map((material, index) => {
            const info = parseGasketInfo(material);
            const isSelected = selectedMaterials.has(material.id);
            const isPurchased = purchasedMaterials.has(material.id);
            
            return (
              <div
                key={material.id}
                style={{
                  display: 'grid',
                  gridTemplateColumns: '50px 250px 120px 100px 120px 200px 100px 180px 200px 120px',
                  gap: '16px',
                  padding: '16px',
                  borderBottom: index < filteredMaterials.length - 1 ? '1px solid #f1f5f9' : 'none',
                  background: isSelected ? '#eff6ff' : (isPurchased ? '#fef3c7' : 'white'),
                  transition: 'background 0.15s ease'
                }}
                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', textAlign: 'center' }}>
                  {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', textAlign: 'center' }}>
                  {info.size}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937', textAlign: 'center' }}>
                  {info.pressure}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937', textAlign: 'center' }}>
                  {info.structure}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937', textAlign: 'center' }}>
                  {info.material}
                </div>
                <div style={{ fontSize: '14px', color: '#1f2937', textAlign: 'center' }}>
                  {info.thickness}
                </div>
                <div style={{ 
                  fontSize: '14px', 
                  color: '#1f2937', 
                  textAlign: 'center',
                  whiteSpace: 'nowrap',
                  overflow: 'hidden',
                  textOverflow: 'ellipsis'
                }}>
                  {info.userRequirements}
                </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 8px',
                        border: '1px solid #e5e7eb',
                        borderRadius: '4px',
                        fontSize: '12px',
                        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 8px',
                          border: '1px solid #d1d5db',
                          borderRadius: '4px',
                          fontSize: '12px',
                          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 style={{ fontSize: '14px', color: '#1f2937', textAlign: 'center', fontWeight: '500' }}>
                  {info.purchaseQuantity.toLocaleString()}
                </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 Gasket Materials Found
          </div>
          <div style={{ fontSize: '14px' }}>
            {Object.keys(columnFilters).some(key => columnFilters[key]) 
              ? 'Try adjusting your filters' 
              : 'No gasket materials available in this BOM'}
          </div>
        </div>
      )}
    </div>
  );
};

export default GasketMaterialsView;
