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

const ValveMaterialsView = ({ 
  materials, 
  selectedMaterials, 
  setSelectedMaterials,
  userRequirements,
  setUserRequirements,
  purchasedMaterials,
  fileId,
  user 
}) => {
  const [sortConfig, setSortConfig] = useState({ key: null, direction: 'asc' });
  const [columnFilters, setColumnFilters] = useState({});
  const [showFilterDropdown, setShowFilterDropdown] = useState(null);

  const parseValveInfo = (material) => {
    const valveDetails = material.valve_details || {};
    const description = material.original_description || '';
    
    // 밸브 타입 파싱 (GATE, BALL, CHECK, GLOBE 등) - 기존 NewMaterialsPage와 동일
    let valveType = valveDetails.valve_type || '';
    if (!valveType && description) {
      if (description.includes('GATE')) valveType = 'GATE';
      else if (description.includes('BALL')) valveType = 'BALL';
      else if (description.includes('CHECK')) valveType = 'CHECK';
      else if (description.includes('GLOBE')) valveType = 'GLOBE';
      else if (description.includes('BUTTERFLY')) valveType = 'BUTTERFLY';
      else if (description.includes('NEEDLE')) valveType = 'NEEDLE';
      else if (description.includes('RELIEF')) valveType = 'RELIEF';
    }
    
    // 연결 방식 파싱 (FLG, SW, THRD 등) - 기존 NewMaterialsPage와 동일
    let connectionType = '';
    if (description.includes('FLG')) {
      connectionType = 'FLG';
    } else if (description.includes('SW X THRD')) {
      connectionType = 'SW×THRD';
    } else if (description.includes('SW')) {
      connectionType = 'SW';
    } else if (description.includes('THRD')) {
      connectionType = 'THRD';
    } else if (description.includes('BW')) {
      connectionType = 'BW';
    }
    
    // 압력 등급 파싱
    let pressure = '-';
    const pressureMatch = description.match(/(\d+)LB/i);
    if (pressureMatch) {
      pressure = `${pressureMatch[1]}LB`;
    }
    
    // 스케줄은 밸브에는 일반적으로 없음 (기본값)
    let schedule = '-';
    
    return {
      type: 'VALVE',
      subtype: `${valveType} ${connectionType}`.trim() || 'VALVE', // 타입과 연결방식 결합
      valveType: valveType,
      connectionType: connectionType,
      size: material.size_spec || '-',
      pressure: pressure,
      schedule: schedule,
      grade: material.material_grade || '-',
      quantity: Math.round(material.quantity || 0),
      unit: '개',
      isValve: 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 = parseValveInfo(material);
        const value = info[key]?.toString().toLowerCase() || '';
        return value.includes(filterValue.toLowerCase());
      });
    });

    if (sortConfig.key) {
      filtered.sort((a, b) => {
        const aInfo = parseValveInfo(a);
        const bInfo = parseValveInfo(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 (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 = `VALVE_Materials_${timestamp}.xlsx`;

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

    try {
      await api.post('/files/save-excel', {
        file_id: fileId,
        category: 'VALVE',
        materials: dataWithRequirements,
        filename: excelFileName,
        user_id: user?.id
      });

      exportMaterialsToExcel(dataWithRequirements, excelFileName, {
        category: 'VALVE',
        filename: excelFileName,
        uploadDate: new Date().toLocaleDateString()
      });

      alert('엑셀 파일이 생성되고 서버에 저장되었습니다.');
    } catch (error) {
      console.error('엑셀 저장 실패:', error);
      exportMaterialsToExcel(dataWithRequirements, excelFileName, {
        category: 'VALVE',
        filename: excelFileName,
        uploadDate: new Date().toLocaleDateString()
      });
    }
  };

  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' 
          }}>
            Valve 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, #ef4444 0%, #dc2626 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: 'hidden',
        boxShadow: '0 1px 3px rgba(0, 0, 0, 0.1)'
      }}>
        {/* 헤더 */}
        <div style={{
          display: 'grid',
          gridTemplateColumns: '50px 200px 120px 100px 120px 150px 80px 80px 200px',
          gap: '16px',
          padding: '16px',
          background: '#f8fafc',
          borderBottom: '1px solid #e2e8f0',
          fontSize: '14px',
          fontWeight: '600',
          color: '#374151'
        }}>
          <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="subtype" filterKey="subtype">Type</FilterableHeader>
          <FilterableHeader sortKey="size" filterKey="size">Size</FilterableHeader>
          <FilterableHeader sortKey="pressure" filterKey="pressure">Pressure</FilterableHeader>
          <FilterableHeader sortKey="schedule" filterKey="schedule">Schedule</FilterableHeader>
          <FilterableHeader sortKey="grade" filterKey="grade">Material Grade</FilterableHeader>
          <FilterableHeader sortKey="quantity" filterKey="quantity">Quantity</FilterableHeader>
          <div>Unit</div>
          <div>User Requirement</div>
        </div>

        {/* 데이터 행들 */}
        <div style={{ maxHeight: '600px', overflowY: 'auto' }}>
          {filteredMaterials.map((material, index) => {
            const info = parseValveInfo(material);
            const isSelected = selectedMaterials.has(material.id);
            const isPurchased = purchasedMaterials.has(material.id);
            
            return (
              <div
                key={material.id}
                style={{
                  display: 'grid',
                  gridTemplateColumns: '50px 200px 120px 100px 120px 150px 80px 80px 200px',
                  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' }}>
                  {info.subtype}
                  {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.pressure}
                </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', fontWeight: '600', textAlign: 'right' }}>
                  {info.quantity}
                </div>
                <div style={{ fontSize: '14px', color: '#6b7280' }}>
                  {info.unit}
                </div>
                <div>
                  <input
                    type="text"
                    value={userRequirements[material.id] || ''}
                    onChange={(e) => setUserRequirements({
                      ...userRequirements,
                      [material.id]: e.target.value
                    })}
                    placeholder="Enter requirement..."
                    style={{
                      width: '100%',
                      padding: '6px 8px',
                      border: '1px solid #d1d5db',
                      borderRadius: '4px',
                      fontSize: '12px'
                    }}
                  />
                </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 Valve Materials Found
          </div>
          <div style={{ fontSize: '14px' }}>
            {Object.keys(columnFilters).some(key => columnFilters[key]) 
              ? 'Try adjusting your filters' 
              : 'No valve materials available in this BOM'}
          </div>
        </div>
      )}
    </div>
  );
};

export default ValveMaterialsView;