'use client';

import { createContext, useContext, useState, useEffect, useMemo, ReactNode } from 'react';
import { useAuth } from './AuthContext';
import { TenantAwareCache } from '@/lib/cache';
import { itemMasterApi } from '@/lib/api/item-master';
import { getErrorMessage } from '@/lib/api/error-handler';
import { transformPageResponse, transformSectionResponse } from '@/lib/api/transformers';
import type { ItemPageRequest } from '@/types/item-master-api';

// ===== Type Definitions =====

// 전개도 상세 정보
export interface BendingDetail {
  id: string;
  no: number; // 번호
  input: number; // 입력
  elongation: number; // 연신율 (기본값 -1)
  calculated: number; // 연신율 계산 후
  sum: number; // 합계
  shaded: boolean; // 음영 여부
  aAngle?: number; // A각
}

// 부품구성표(BOM, Bill of Materials) - 자재 명세서
export interface BOMLine {
  id: string;
  childItemCode: string; // 구성 품목 코드
  childItemName: string; // 구성 품목명
  quantity: number; // 기준 수량
  unit: string; // 단위
  unitPrice?: number; // 단가
  quantityFormula?: string; // 수량 계산식 (예: "W * 2", "H + 100")
  note?: string; // 비고
  // 절곡품 관련 (하위 절곡 부품용)
  isBending?: boolean;
  bendingDiagram?: string; // 전개도 이미지 URL
  bendingDetails?: BendingDetail[]; // 전개도 상세 데이터
}

// 규격 마스터 (원자재/부자재용)
export interface SpecificationMaster {
  id: string;
  specificationCode: string; // 규격 코드 (예: 1.6T x 1219 x 2438)
  itemType: 'RM' | 'SM'; // 원자재 | 부자재
  itemName?: string; // 품목명 (예: SPHC-SD, SPCC-SD) - 품목명별 규격 필터링용
  fieldCount: '1' | '2' | '3'; // 너비 입력 개수
  thickness: string; // 두께
  widthA: string; // 너비A
  widthB?: string; // 너비B
  widthC?: string; // 너비C
  length: string; // 길이
  description?: string; // 설명
  isActive: boolean; // 활성 여부
  createdAt?: string;
  updatedAt?: string;
}

// 원자재/부자재 품목명 마스터
export interface MaterialItemName {
  id: string;
  itemType: 'RM' | 'SM'; // 원자재 | 부자재
  itemName: string; // 품목명 (예: "SPHC-SD", "STS430")
  category?: string; // 분류 (예: "냉연", "열연", "스테인리스")
  description?: string; // 설명
  isActive: boolean; // 활성 여부
  createdAt: string;
  updatedAt?: string;
}

// 품목 수정 이력
export interface ItemRevision {
  revisionNumber: number; // 수정 차수 (1차, 2차, 3차...)
  revisionDate: string; // 수정일
  revisionBy: string; // 수정자
  revisionReason?: string; // 수정 사유
  previousData: any; // 이전 버전의 전체 데이터
}

// 품목 마스터
export interface ItemMaster {
  id: string;
  itemCode: string;
  itemName: string;
  itemType: 'FG' | 'PT' | 'SM' | 'RM' | 'CS'; // 제품, 부품, 부자재, 원자재, 소모품
  productCategory?: 'SCREEN' | 'STEEL'; // 제품 카테고리 (스크린/철재)
  partType?: 'ASSEMBLY' | 'BENDING' | 'PURCHASED'; // 부품 유형 (조립/절곡/구매)
  partUsage?: 'GUIDE_RAIL' | 'BOTTOM_FINISH' | 'CASE' | 'DOOR' | 'BRACKET' | 'GENERAL'; // 부품 용도
  unit: string;
  category1?: string;
  category2?: string;
  category3?: string;
  specification?: string;
  isVariableSize?: boolean;
  isActive?: boolean; // 품목 활성/비활성 (제품/부품/원자재/부자재만 사용)
  lotAbbreviation?: string; // 로트 약자 (제품만 사용)
  purchasePrice?: number;
  marginRate?: number;
  processingCost?: number;
  laborCost?: number;
  installCost?: number;
  salesPrice?: number;
  safetyStock?: number;
  leadTime?: number;
  bom?: BOMLine[]; // 부품구성표(BOM) - 자재 명세서
  bomCategories?: string[]; // 견적산출용 샘플 제품의 BOM 카테고리 (예: ['motor', 'guide-rail'])

  // 인정 정보
  certificationNumber?: string; // 인정번호
  certificationStartDate?: string; // 인정 유효기간 시작일
  certificationEndDate?: string; // 인정 유효기간 종료일
  specificationFile?: string; // 시방서 파일 (Base64 또는 URL)
  specificationFileName?: string; // 시방서 파일명
  certificationFile?: string; // 인정서 파일 (Base64 또는 URL)
  certificationFileName?: string; // 인정서 파일명
  note?: string; // 비고 (제품만 사용)

  // 조립 부품 관련 필드
  installationType?: string; // 설치 유형 (wall: 벽면형, side: 측면형, steel: 스틸, iron: 철재)
  assemblyType?: string; // 종류 (M, T, C, D, S, U 등)
  sideSpecWidth?: string; // 측면 규격 가로 (mm)
  sideSpecHeight?: string; // 측면 규격 세로 (mm)
  assemblyLength?: string; // 길이 (2438, 3000, 3500, 4000, 4300 등)

  // 가이드레일 관련 필드
  guideRailModelType?: string; // 가이드레일 모델 유형
  guideRailModel?: string; // 가이드레일 모델

  // 절곡품 관련 (부품 유형이 BENDING인 경우)
  bendingDiagram?: string; // 전개도 이미지 URL
  bendingDetails?: BendingDetail[]; // 전개도 상세 데이터
  material?: string; // 재질 (EGI 1.55T, SUS 1.2T 등)
  length?: string; // 길이/목함 (mm)

  // 버전 관리
  currentRevision: number; // 현재 차수 (0 = 최초, 1 = 1차 수정...)
  revisions?: ItemRevision[]; // 수정 이력
  isFinal: boolean; // 최종 확정 여부
  finalizedDate?: string; // 최종 확정일
  finalizedBy?: string; // 최종 확정자

  createdAt: string;
}

// 품목 기준정보 관리 (Master Data)
export interface ItemCategory {
  id: string;
  categoryType: 'PRODUCT' | 'PART' | 'MATERIAL' | 'SUB_MATERIAL'; // 품목 구분
  category1: string; // 대분류
  category2?: string; // 중분류
  category3?: string; // 소분류
  code?: string; // 코드 (자동생성 또는 수동입력)
  description?: string;
  isActive: boolean;
  createdAt: string;
  updatedAt?: string;
}

export interface ItemUnit {
  id: string;
  unitCode: string; // 단위 코드 (EA, SET, M, KG, L 등)
  unitName: string; // 단위명
  description?: string;
  isActive: boolean;
  createdAt: string;
  updatedAt?: string;
}

export interface ItemMaterial {
  id: string;
  materialCode: string; // 재질 코드
  materialName: string; // 재질명 (EGI 1.55T, SUS 1.2T 등)
  materialType: 'STEEL' | 'ALUMINUM' | 'PLASTIC' | 'OTHER'; // 재질 유형
  thickness?: string; // 두께 (1.2T, 1.6T 등)
  description?: string;
  isActive: boolean;
  createdAt: string;
  updatedAt?: string;
}

export interface SurfaceTreatment {
  id: string;
  treatmentCode: string; // 처리 코드
  treatmentName: string; // 처리명 (무도장, 파우더도장, 아노다이징 등)
  treatmentType: 'PAINTING' | 'COATING' | 'PLATING' | 'NONE'; // 처리 유형
  description?: string;
  isActive: boolean;
  createdAt: string;
  updatedAt?: string;
}

export interface PartTypeOption {
  id: string;
  partType: 'ASSEMBLY' | 'BENDING' | 'PURCHASED'; // 부품 유형
  optionCode: string; // 옵션 코드
  optionName: string; // 옵션명
  description?: string;
  isActive: boolean;
  createdAt: string;
  updatedAt?: string;
}

export interface PartUsageOption {
  id: string;
  usageCode: string; // 용도 코드
  usageName: string; // 용도명 (가이드레일, 하단마감재, 케이스 등)
  description?: string;
  isActive: boolean;
  createdAt: string;
  updatedAt?: string;
}

export interface GuideRailOption {
  id: string;
  optionType: 'MODEL_TYPE' | 'MODEL' | 'CERTIFICATION' | 'SHAPE' | 'FINISH' | 'LENGTH'; // 옵션 유형
  optionCode: string; // 옵션 코드
  optionName: string; // 옵션명
  parentOption?: string; // 상위 옵션 (종속 관계)
  description?: string;
  isActive: boolean;
  createdAt: string;
  updatedAt?: string;
}

// ===== 품목기준관리 계층구조 =====

// 항목 속성
export interface ItemFieldProperty {
  id?: string; // 속성 ID (properties 배열에서 사용)
  key?: string; // 속성 키 (properties 배열에서 사용)
  label?: string; // 속성 라벨 (properties 배열에서 사용)
  type?: 'textbox' | 'dropdown' | 'checkbox' | 'number' | 'date' | 'textarea'; // 속성 타입 (properties 배열에서 사용)
  inputType: 'textbox' | 'dropdown' | 'checkbox' | 'number' | 'date' | 'textarea' | 'section'; // 입력방식
  required: boolean; // 필수 여부
  row: number; // 행 위치
  col: number; // 열 위치
  options?: string[]; // 드롭다운 옵션 (입력방식이 dropdown일 경우)
  defaultValue?: string; // 기본값
  placeholder?: string; // 플레이스홀더
  multiColumn?: boolean; // 다중 컬럼 사용 여부
  columnCount?: number; // 컬럼 개수
  columnNames?: string[]; // 각 컬럼의 이름
}

// 항목 마스터 (재사용 가능한 항목 템플릿) - MasterFieldResponse와 정확히 일치
export interface ItemMasterField {
  id: number;
  tenant_id: number;
  field_name: string;
  field_type: 'textbox' | 'number' | 'dropdown' | 'checkbox' | 'date' | 'textarea'; // API와 동일
  category: string | null;
  description: string | null;
  is_common: boolean; // 공통 필드 여부
  default_value: string | null; // 기본값
  options: Array<{ label: string; value: string }> | null; // dropdown 옵션
  validation_rules: Record<string, any> | null; // 검증 규칙
  properties: Record<string, any> | null; // 추가 속성
  created_by: number | null;
  updated_by: number | null;
  created_at: string;
  updated_at: string;
}

// 조건부 표시 설정
export interface FieldDisplayCondition {
  targetType: 'field' | 'section'; // 조건 대상 타입
  // 일반항목 조건 (여러 개 가능)
  fieldConditions?: Array<{
    fieldKey: string; // 조건이 되는 필드의 키
    expectedValue: string; // 예상되는 값
  }>;
  // 섹션 조건 (여러 개 가능)
  sectionIds?: string[]; // 표시할 섹션 ID 배열
}

// 항목 (Field) - API 응답 구조에 맞춰 수정
export interface ItemField {
  id: number; // 서버 생성 ID (string → number)
  tenant_id?: number; // 백엔드에서 자동 추가
  section_id: number; // 외래키 - 섹션 ID
  master_field_id?: number | null; // 마스터 항목 ID (마스터에서 가져온 경우)
  field_name: string; // 항목명 (name → field_name)
  field_type: 'textbox' | 'number' | 'dropdown' | 'checkbox' | 'date' | 'textarea'; // 필드 타입
  order_no: number; // 항목 순서 (order → order_no, required)
  is_required: boolean; // 필수 여부
  placeholder?: string | null; // 플레이스홀더
  default_value?: string | null; // 기본값
  display_condition?: Record<string, any> | null; // 조건부 표시 설정 (displayCondition → display_condition)
  validation_rules?: Record<string, any> | null; // 검증 규칙
  options?: Array<{ label: string; value: string }> | null; // dropdown 옵션
  properties?: Record<string, any> | null; // 추가 속성
  created_by?: number | null; // 생성자 ID 추가
  updated_by?: number | null; // 수정자 ID 추가
  created_at: string; // 생성일 (camelCase → snake_case)
  updated_at: string; // 수정일 추가
}

// BOM 아이템 타입 - API 응답 구조에 맞춰 수정
export interface BOMItem {
  id: number; // 서버 생성 ID (string → number)
  tenant_id?: number; // 백엔드에서 자동 추가
  section_id: number; // 외래키 - 섹션 ID
  item_code?: string | null; // 품목 코드 (itemCode → item_code, optional)
  item_name: string; // 품목명 (itemName → item_name)
  quantity: number; // 수량
  unit?: string | null; // 단위 (optional)
  unit_price?: number | null; // 단가 추가
  total_price?: number | null; // 총액 추가
  spec?: string | null; // 규격/사양 추가
  note?: string | null; // 비고 (optional)
  created_by?: number | null; // 생성자 ID 추가
  updated_by?: number | null; // 수정자 ID 추가
  created_at: string; // 생성일 (createdAt → created_at)
  updated_at: string; // 수정일 추가
}

// 섹션 (Section) - API 응답 구조에 맞춰 수정
export interface ItemSection {
  id: number; // 서버 생성 ID (string → number)
  tenant_id?: number; // 백엔드에서 자동 추가
  page_id: number; // 외래키 - 페이지 ID
  section_template_id?: number | null; // 섹션 템플릿 ID (템플릿 기반 섹션인 경우)
  section_name: string; // 섹션 제목 (title → section_name)
  section_type: 'BASIC' | 'BOM' | 'CUSTOM'; // 섹션 타입 (type → section_type, 값 변경)
  description?: string | null; // 설명
  order_no: number; // 섹션 순서 (order → order_no)
  is_collapsible: boolean; // 접기/펼치기 가능 여부 (camelCase → snake_case)
  is_default_open: boolean; // 기본 열림 상태 (isCollapsed → is_default_open, 의미 반대)
  created_by?: number | null; // 생성자 ID 추가
  updated_by?: number | null; // 수정자 ID 추가
  created_at: string; // 생성일 (camelCase → snake_case)
  updated_at: string; // 수정일 추가
  fields?: ItemField[]; // 섹션에 포함된 항목들 (optional로 변경)
  bomItems?: BOMItem[]; // BOM 타입일 경우 BOM 품목 목록
}

// 페이지 (Page) - API 응답 구조에 맞춰 수정
export interface ItemPage {
  id: number; // 서버 생성 ID (string → number)
  tenant_id?: number; // 백엔드에서 자동 추가
  page_name: string; // 페이지명 (camelCase → snake_case)
  item_type: 'FG' | 'PT' | 'SM' | 'RM' | 'CS'; // 품목유형
  description?: string | null; // 설명 추가
  absolute_path: string; // 절대경로 (camelCase → snake_case)
  is_active: boolean; // 사용 여부 (camelCase → snake_case)
  order_no: number; // 순서 번호 추가
  created_by?: number | null; // 생성자 ID 추가
  updated_by?: number | null; // 수정자 ID 추가
  created_at: string; // 생성일 (camelCase → snake_case)
  updated_at: string; // 수정일 (camelCase → snake_case)
  sections: ItemSection[]; // 페이지에 포함된 섹션들 (Nested)
}

// 템플릿 필드 (로컬 관리용 - API에서 제공하지 않음)
export interface TemplateField {
  id: string;
  name: string;
  fieldKey: string;
  property: {
    inputType: 'textbox' | 'number' | 'dropdown' | 'checkbox' | 'date' | 'textarea';
    required: boolean;
    options?: string[];
    multiColumn?: boolean;
    columnCount?: number;
    columnNames?: string[];
  };
  description?: string;
}

// 섹션 템플릿 (재사용 가능한 섹션) - Transformer 출력과 UI 요구사항에 맞춤
export interface SectionTemplate {
  id: number;
  tenant_id: number;
  template_name: string; // transformer가 title → template_name으로 변환
  section_type: 'BASIC' | 'BOM' | 'CUSTOM'; // transformer가 type → section_type으로 변환
  description: string | null;
  default_fields: TemplateField[] | null; // 기본 필드 (로컬 관리)
  category?: string[]; // 적용 카테고리 (로컬 관리)
  fields?: TemplateField[]; // 템플릿에 포함된 필드 (로컬 관리)
  bomItems?: BOMItem[]; // BOM 타입일 경우 BOM 품목 (로컬 관리)
  created_by: number | null;
  updated_by: number | null;
  created_at: string;
  updated_at: string;
}

// ===== Context Type =====
interface ItemMasterContextType {
  // 품목 마스터 데이터
  itemMasters: ItemMaster[];
  addItemMaster: (item: ItemMaster) => void;
  updateItemMaster: (id: string, updates: Partial<ItemMaster>) => void;
  deleteItemMaster: (id: string) => void;

  // 규격 마스터 데이터 (원자재/부자재)
  specificationMasters: SpecificationMaster[];
  addSpecificationMaster: (spec: SpecificationMaster) => void;
  updateSpecificationMaster: (id: string, updates: Partial<SpecificationMaster>) => void;
  deleteSpecificationMaster: (id: string) => void;

  // 원자재/부자재 품목명 마스터 데이터
  materialItemNames: MaterialItemName[];
  addMaterialItemName: (item: MaterialItemName) => void;
  updateMaterialItemName: (id: string, updates: Partial<MaterialItemName>) => void;
  deleteMaterialItemName: (id: string) => void;

  // 품목기준관리 - 마스터 항목
  itemMasterFields: ItemMasterField[];
  loadItemMasterFields: (fields: ItemMasterField[]) => void; // 초기 데이터 로딩용 (API 호출 없음)
  addItemMasterField: (field: Omit<ItemMasterField, 'id' | 'created_at' | 'updated_at'>) => Promise<void>;
  updateItemMasterField: (id: number, updates: Partial<ItemMasterField>) => Promise<void>;
  deleteItemMasterField: (id: number) => Promise<void>;

  // 품목기준관리 - 섹션 템플릿
  sectionTemplates: SectionTemplate[];
  loadSectionTemplates: (templates: SectionTemplate[]) => void; // 초기 데이터 로딩용 (API 호출 없음)
  addSectionTemplate: (template: Omit<SectionTemplate, 'id' | 'created_at' | 'updated_at'>) => Promise<void>;
  updateSectionTemplate: (id: number, updates: Partial<SectionTemplate>) => Promise<void>;
  deleteSectionTemplate: (id: number) => Promise<void>;

  // 품목기준관리 계층구조
  itemPages: ItemPage[];
  loadItemPages: (pages: ItemPage[]) => void; // 초기 데이터 로딩용 (API 호출 없음)
  addItemPage: (page: Omit<ItemPage, 'id' | 'created_at' | 'updated_at'>) => Promise<ItemPage>;
  updateItemPage: (id: number, updates: Partial<ItemPage>) => Promise<void>;
  deleteItemPage: (id: number) => Promise<void>;
  reorderPages: (newOrder: Array<{ id: number; order_no: number }>) => Promise<void>;
  addSectionToPage: (pageId: number, sectionData: Omit<ItemSection, 'id' | 'created_at' | 'updated_at'>) => Promise<void>;
  updateSection: (sectionId: number, updates: Partial<ItemSection>) => Promise<void>;
  deleteSection: (sectionId: number) => Promise<void>;
  reorderSections: (pageId: number, sectionIds: number[]) => Promise<void>;
  addFieldToSection: (sectionId: number, fieldData: Omit<ItemField, 'id' | 'created_at' | 'updated_at'>) => Promise<void>;
  updateField: (fieldId: number, updates: Partial<ItemField>) => Promise<void>;
  deleteField: (fieldId: number) => Promise<void>;
  reorderFields: (sectionId: number, fieldIds: number[]) => Promise<void>;

  // BOM 관리
  addBOMItem: (sectionId: number, bomData: Omit<BOMItem, 'id' | 'created_at' | 'updated_at'>) => Promise<void>;
  updateBOMItem: (bomId: number, updates: Partial<BOMItem>) => Promise<void>;
  deleteBOMItem: (bomId: number) => Promise<void>;

  // 품목 기준정보 관리
  itemCategories: ItemCategory[];
  itemUnits: ItemUnit[];
  itemMaterials: ItemMaterial[];
  surfaceTreatments: SurfaceTreatment[];
  partTypeOptions: PartTypeOption[];
  partUsageOptions: PartUsageOption[];
  guideRailOptions: GuideRailOption[];

  addItemCategory: (category: ItemCategory) => void;
  updateItemCategory: (id: string, updates: Partial<ItemCategory>) => void;
  deleteItemCategory: (id: string) => void;

  addItemUnit: (unit: ItemUnit) => void;
  updateItemUnit: (id: string, updates: Partial<ItemUnit>) => void;
  deleteItemUnit: (id: string) => void;

  addItemMaterial: (material: ItemMaterial) => void;
  updateItemMaterial: (id: string, updates: Partial<ItemMaterial>) => void;
  deleteItemMaterial: (id: string) => void;

  addSurfaceTreatment: (treatment: SurfaceTreatment) => void;
  updateSurfaceTreatment: (id: string, updates: Partial<SurfaceTreatment>) => void;
  deleteSurfaceTreatment: (id: string) => void;

  addPartTypeOption: (option: PartTypeOption) => void;
  updatePartTypeOption: (id: string, updates: Partial<PartTypeOption>) => void;
  deletePartTypeOption: (id: string) => void;

  addPartUsageOption: (option: PartUsageOption) => void;
  updatePartUsageOption: (id: string, updates: Partial<PartUsageOption>) => void;
  deletePartUsageOption: (id: string) => void;

  addGuideRailOption: (option: GuideRailOption) => void;
  updateGuideRailOption: (id: string, updates: Partial<GuideRailOption>) => void;
  deleteGuideRailOption: (id: string) => void;

  // 캐시 및 데이터 초기화
  clearCache: () => void; // TenantAwareCache 정리
  resetAllData: () => void; // 모든 state 초기화

  // 테넌트 정보
  tenantId: number | undefined; // 현재 로그인한 사용자의 테넌트 ID
}

// Create context
const ItemMasterContext = createContext<ItemMasterContextType | undefined>(undefined);

// Provider component
export function ItemMasterProvider({ children }: { children: ReactNode }) {
  // ===== Initial Data =====
  // ✅ Mock 데이터 주석 처리 - API에서 가져올 예정
  const initialItemMasters: ItemMaster[] = [];

  /* ❌ Mock 데이터 주석 처리 - 백엔드 API 연동 후 제거
  const initialSpecificationMasters: SpecificationMaster[] = [
    // SPHC-SD 규격
    { id: 'spec-001', specificationCode: '1219*1200', itemType: 'RM', itemName: 'SPHC-SD', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-002', specificationCode: '1219*2438', itemType: 'RM', itemName: 'SPHC-SD', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-003', specificationCode: '1219*3000', itemType: 'RM', itemName: 'SPHC-SD', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // SPCC-SD 규격
    { id: 'spec-004', specificationCode: '1219*1200', itemType: 'RM', itemName: 'SPCC-SD', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-005', specificationCode: '1219*2438', itemType: 'RM', itemName: 'SPCC-SD', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-006', specificationCode: '1219*3000', itemType: 'RM', itemName: 'SPCC-SD', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // SECC 규격
    { id: 'spec-007', specificationCode: '1219*1200', itemType: 'RM', itemName: 'SECC', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-008', specificationCode: '1219*2438', itemType: 'RM', itemName: 'SECC', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-009', specificationCode: '1219*3000', itemType: 'RM', itemName: 'SECC', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // SGCC 규격
    { id: 'spec-010', specificationCode: '1219*1200', itemType: 'RM', itemName: 'SGCC', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-011', specificationCode: '1219*2438', itemType: 'RM', itemName: 'SGCC', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-012', specificationCode: '1219*3000', itemType: 'RM', itemName: 'SGCC', fieldCount: '1', thickness: '1.6', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // SPHD 규격
    { id: 'spec-013', specificationCode: '1219*1200', itemType: 'RM', itemName: 'SPHD', fieldCount: '1', thickness: '2.0', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-014', specificationCode: '1219*2438', itemType: 'RM', itemName: 'SPHD', fieldCount: '1', thickness: '2.0', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-015', specificationCode: '1219*3000', itemType: 'RM', itemName: 'SPHD', fieldCount: '1', thickness: '2.0', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // SS330 규격
    { id: 'spec-016', specificationCode: '1219*1200', itemType: 'RM', itemName: 'SS330', fieldCount: '1', thickness: '2.3', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-017', specificationCode: '1219*2438', itemType: 'RM', itemName: 'SS330', fieldCount: '1', thickness: '2.3', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-018', specificationCode: '1219*3000', itemType: 'RM', itemName: 'SS330', fieldCount: '1', thickness: '2.3', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // SS400 규격
    { id: 'spec-019', specificationCode: '1219*1200', itemType: 'RM', itemName: 'SS400', fieldCount: '1', thickness: '2.3', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-020', specificationCode: '1219*2438', itemType: 'RM', itemName: 'SS400', fieldCount: '1', thickness: '2.3', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-021', specificationCode: '1219*3000', itemType: 'RM', itemName: 'SS400', fieldCount: '1', thickness: '2.3', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // STS304 규격
    { id: 'spec-022', specificationCode: '1219*1200', itemType: 'RM', itemName: 'STS304', fieldCount: '1', thickness: '1.5', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-023', specificationCode: '1219*2438', itemType: 'RM', itemName: 'STS304', fieldCount: '1', thickness: '1.5', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-024', specificationCode: '1219*3000', itemType: 'RM', itemName: 'STS304', fieldCount: '1', thickness: '1.5', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
    // STS430 규격
    { id: 'spec-025', specificationCode: '1219*1200', itemType: 'RM', itemName: 'STS430', fieldCount: '1', thickness: '1.5', widthA: '1219', length: '1200', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-026', specificationCode: '1219*2438', itemType: 'RM', itemName: 'STS430', fieldCount: '1', thickness: '1.5', widthA: '1219', length: '2438', isActive: true, createdAt: new Date().toISOString() },
    { id: 'spec-027', specificationCode: '1219*3000', itemType: 'RM', itemName: 'STS430', fieldCount: '1', thickness: '1.5', widthA: '1219', length: '3000', isActive: true, createdAt: new Date().toISOString() },
  ];

  const initialMaterialItemNames: MaterialItemName[] = [
    // 원자재 (RM) - 철판/강판류
    { id: 'mat-001', itemType: 'RM', itemName: 'SPHC-SD', category: '냉연강판', description: '일반냉연강판', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-002', itemType: 'RM', itemName: 'SPCC-SD', category: '냉연강판', description: '냉연강판', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-003', itemType: 'RM', itemName: 'SECC', category: '냉연강판', description: '전기아연도금강판', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-004', itemType: 'RM', itemName: 'SGCC', category: '냉연강판', description: '용융아연도금강판', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-005', itemType: 'RM', itemName: 'SPHD', category: '열연강판', description: '열연강판', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-006', itemType: 'RM', itemName: 'SS330', category: '일반구조용강', description: '일반구조용강재', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-007', itemType: 'RM', itemName: 'SS400', category: '일반구조용강', description: '일반구조용강재', isActive: true, createdAt: new Date().toISOString() },
    // 원자재 (RM) - 스테인리스
    { id: 'mat-008', itemType: 'RM', itemName: 'STS304', category: '스테인리스', description: '스테인리스강판 304', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-009', itemType: 'RM', itemName: 'STS430', category: '스테인리스', description: '스테인리스강판 430', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-010', itemType: 'RM', itemName: 'STS316', category: '스테인리스', description: '스테인리스강판 316', isActive: true, createdAt: new Date().toISOString() },
    // 원자재 (RM) - 알루미늄
    { id: 'mat-011', itemType: 'RM', itemName: 'AL5052', category: '알루미늄', description: '알루미늄합금 5052', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-012', itemType: 'RM', itemName: 'AL6063', category: '알루미늄', description: '알루미늄합금 6063', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-013', itemType: 'RM', itemName: 'AL1050', category: '알루미늄', description: '알루미늄 1050', isActive: true, createdAt: new Date().toISOString() },
    // 원자재 (RM) - 파이프/각관
    { id: 'mat-014', itemType: 'RM', itemName: '각파이프', category: '파이프류', description: '각형강관', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-015', itemType: 'RM', itemName: '원형파이프', category: '파이프류', description: '원형강관', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-016', itemType: 'RM', itemName: 'STS파이프', category: '파이프류', description: '스테인리스파이프', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-017', itemType: 'RM', itemName: '앵글', category: '형강류', description: '등변앵글', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-018', itemType: 'RM', itemName: '채널', category: '형강류', description: 'C형강', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-019', itemType: 'RM', itemName: 'H빔', category: '형강류', description: 'H형강', isActive: true, createdAt: new Date().toISOString() },
    // 원자재 (RM) - 기타 금속
    { id: 'mat-020', itemType: 'RM', itemName: '황동판', category: '비철금속', description: '황동', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-021', itemType: 'RM', itemName: '구리판', category: '비철금속', description: '구리', isActive: true, createdAt: new Date().toISOString() },
    // 부자재 (SM) - 체결부품
    { id: 'mat-101', itemType: 'SM', itemName: '육각볼트', category: '체결부품', description: '육각머리볼트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-102', itemType: 'SM', itemName: '육각너트', category: '체결부품', description: '육각너트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-103', itemType: 'SM', itemName: '평와셔', category: '체결부품', description: '평와셔', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-104', itemType: 'SM', itemName: '스프링와셔', category: '체결부품', description: '스프링와셔', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-105', itemType: 'SM', itemName: '십자나사', category: '체결부품', description: '십자머리나사', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-106', itemType: 'SM', itemName: '접시나사', category: '체결부품', description: '접시머리나사', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-107', itemType: 'SM', itemName: '렌치볼트', category: '체결부품', description: '육각구멍붙이볼트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-108', itemType: 'SM', itemName: '탭핑나사', category: '체결부품', description: '태핑나사', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-109', itemType: 'SM', itemName: '리벳', category: '체결부품', description: '리벳', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-110', itemType: 'SM', itemName: '앵커볼트', category: '체결부품', description: '앵커볼트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-111', itemType: 'SM', itemName: '케미컬앵커', category: '체결부품', description: '케미컬앵커', isActive: true, createdAt: new Date().toISOString() },
    // 부자재 (SM) - 용접/접착
    { id: 'mat-201', itemType: 'SM', itemName: '용접봉', category: '용접재료', description: '용접봉', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-202', itemType: 'SM', itemName: '용접와이어', category: '용접재료', description: '용접와이어', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-203', itemType: 'SM', itemName: '실리콘', category: '접착/실링', description: '실리콘실란트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-204', itemType: 'SM', itemName: '우레탄', category: '접착/실링', description: '우레탄실란트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-205', itemType: 'SM', itemName: '에폭시', category: '접착/실링', description: '에폭시접착제', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-206', itemType: 'SM', itemName: '순간접착제', category: '접착/실링', description: '순간접착제', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-207', itemType: 'SM', itemName: '양면테이프', category: '접착/실링', description: '양면테이프', isActive: true, createdAt: new Date().toISOString() },
    // 부자재 (SM) - 도장/표면처리
    { id: 'mat-301', itemType: 'SM', itemName: '도료(백색)', category: '도장재료', description: '백색도료', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-302', itemType: 'SM', itemName: '도료(흑색)', category: '도장재료', description: '흑색도료', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-303', itemType: 'SM', itemName: '도료(회색)', category: '도장재료', description: '회색도료', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-304', itemType: 'SM', itemName: '신나', category: '도장재료', description: '희석제', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-305', itemType: 'SM', itemName: '프라이머', category: '도장재료', description: '방청프라이머', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-306', itemType: 'SM', itemName: '분체도료', category: '도장재료', description: '분체도료', isActive: true, createdAt: new Date().toISOString() },
    // 부자재 (SM) - 연마/연삭
    { id: 'mat-401', itemType: 'SM', itemName: '연마지', category: '연마재', description: '샌드페이퍼', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-402', itemType: 'SM', itemName: '연마석', category: '연마재', description: '연마석', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-403', itemType: 'SM', itemName: '절단석', category: '연마재', description: '절단석', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-404', itemType: 'SM', itemName: '와이어브러쉬', category: '연마재', description: '와이어브러쉬', isActive: true, createdAt: new Date().toISOString() },
    // 부자재 (SM) - 기타 부자재
    { id: 'mat-501', itemType: 'SM', itemName: '고무패킹', category: '패킹/가스켓', description: '고무패킹', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-502', itemType: 'SM', itemName: '우레탄폼', category: '충진재', description: '우레탄폼', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-503', itemType: 'SM', itemName: '보양테이프', category: '보양재', description: '마스킹테이프', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-504', itemType: 'SM', itemName: '보호필름', category: '보양재', description: '표면보호필름', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-505', itemType: 'SM', itemName: '윤활유', category: '유류', description: '윤활유', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-506', itemType: 'SM', itemName: '절삭유', category: '유류', description: '절삭유', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-507', itemType: 'SM', itemName: '방청유', category: '유류', description: '방청유', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-508', itemType: 'SM', itemName: '탈지제', category: '세정제', description: '탈지제', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-509', itemType: 'SM', itemName: '감기샤프트', category: '샤프트/축', description: '감기샤프트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-510', itemType: 'SM', itemName: '개폐암', category: '구동부품', description: '개폐암', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-511', itemType: 'SM', itemName: '경첩', category: '체결부품', description: '경첩', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-512', itemType: 'SM', itemName: '고정핀', category: '체결부품', description: '고정핀', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-513', itemType: 'SM', itemName: '고정클램프', category: '체결부품', description: '고정클램프', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-514', itemType: 'SM', itemName: '구동모터', category: '모터/동력', description: '구동모터', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-515', itemType: 'SM', itemName: '기어모터', category: '모터/동력', description: '기어모터', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-516', itemType: 'SM', itemName: '너클', category: '구동부품', description: '너클', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-517', itemType: 'SM', itemName: '드럼', category: '구동부품', description: '드럼', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-518', itemType: 'SM', itemName: '롤러', category: '구동부품', description: '롤러', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-519', itemType: 'SM', itemName: '브라켓', category: '구조부품', description: '브라켓', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-520', itemType: 'SM', itemName: '베어링', category: '베어링류', description: '베어링', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-521', itemType: 'SM', itemName: '볼트', category: '체결부품', description: '볼트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-522', itemType: 'SM', itemName: '부싱', category: '베어링류', description: '부싱', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-523', itemType: 'SM', itemName: '샤프트', category: '샤프트/축', description: '샤프트', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-524', itemType: 'SM', itemName: '스냅링', category: '체결부품', description: '스냅링', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-525', itemType: 'SM', itemName: '스프링', category: '스프링류', description: '스프링', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-526', itemType: 'SM', itemName: '스프로킷', category: '구동부품', description: '스프로킷', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-527', itemType: 'SM', itemName: '스프링와셔', category: '체결부품', description: '스프링와셔', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-528', itemType: 'SM', itemName: '실', category: '패킹/가스켓', description: '실', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-529', itemType: 'SM', itemName: '안전키', category: '체결부품', description: '안전키', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-530', itemType: 'SM', itemName: '연결핀', category: '체결부품', description: '연결핀', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-531', itemType: 'SM', itemName: '와셔', category: '체결부품', description: '와셔', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-532', itemType: 'SM', itemName: '와이어로프', category: '와이어/체인', description: '와이어로프', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-533', itemType: 'SM', itemName: '체인', category: '와이어/체인', description: '체인', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-534', itemType: 'SM', itemName: '축', category: '샤프트/축', description: '축', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-535', itemType: 'SM', itemName: '커플링', category: '구동부품', description: '커플링', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-536', itemType: 'SM', itemName: '턴버클', category: '체결부품', description: '턴버클', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-537', itemType: 'SM', itemName: '플렌지', category: '구조부품', description: '플렌지', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-538', itemType: 'SM', itemName: '풀리', category: '구동부품', description: '풀리', isActive: true, createdAt: new Date().toISOString() },
    { id: 'mat-539', itemType: 'SM', itemName: '핀', category: '체결부품', description: '핀', isActive: true, createdAt: new Date().toISOString() },
    // 원자재 (RM) - 추가 품목
    { id: 'mat-022', itemType: 'RM', itemName: 'EGI0.8T', category: '냉연강판', description: '전기아연도금강판 0.8T', isActive: true, createdAt: new Date().toISOString() },
  ];

  const initialItemCategories: ItemCategory[] = [
    { id: 'CAT-001', categoryType: 'PRODUCT', category1: '스크린', code: 'SC', description: '스크린 셔터', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-002', categoryType: 'PRODUCT', category1: '철재문', code: 'SD', description: '철재 방화문', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-003', categoryType: 'PRODUCT', category1: '블라인드', code: 'BL', description: '블라인드', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-101', categoryType: 'PART', category1: '가이드레일', code: 'GR', description: '가이드레일 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-102', categoryType: 'PART', category1: '하단마감재', code: 'BF', description: '하단마감재', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-103', categoryType: 'PART', category1: '케이스', code: 'CS', description: '케이스 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-104', categoryType: 'PART', category1: '도어', code: 'DR', description: '도어 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-105', categoryType: 'PART', category1: '브라켓', code: 'BR', description: '브라켓 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-201', categoryType: 'MATERIAL', category1: '강판', code: 'SP', description: '강판 원자재', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-202', categoryType: 'MATERIAL', category1: '알루미늄', code: 'AL', description: '알루미늄 원자재', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-203', categoryType: 'MATERIAL', category1: '플라스틱', code: 'PL', description: '플라스틱 원자재', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-301', categoryType: 'SUB_MATERIAL', category1: '볼트너트', code: 'BN', description: '볼트/너트', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-302', categoryType: 'SUB_MATERIAL', category1: '나사', code: 'SC', description: '나사류', isActive: true, createdAt: '2025-01-01' },
    { id: 'CAT-303', categoryType: 'SUB_MATERIAL', category1: '페인트', code: 'PT', description: '도료', isActive: true, createdAt: '2025-01-01' },
  ];

  const initialItemUnits: ItemUnit[] = [
    { id: 'UNIT-001', unitCode: 'EA', unitName: 'EA (개)', description: '낱개 단위', isActive: true, createdAt: '2025-01-01' },
    { id: 'UNIT-002', unitCode: 'SET', unitName: 'SET (세트)', description: '세트 단위', isActive: true, createdAt: '2025-01-01' },
    { id: 'UNIT-003', unitCode: 'M', unitName: 'M (미터)', description: '길이 단위', isActive: true, createdAt: '2025-01-01' },
    { id: 'UNIT-004', unitCode: 'KG', unitName: 'KG (킬로그램)', description: '무게 단위', isActive: true, createdAt: '2025-01-01' },
    { id: 'UNIT-005', unitCode: 'L', unitName: 'L (리터)', description: '부피 단위', isActive: true, createdAt: '2025-01-01' },
    { id: 'UNIT-006', unitCode: 'M2', unitName: '㎡ (제곱미터)', description: '면적 단위', isActive: true, createdAt: '2025-01-01' },
    { id: 'UNIT-007', unitCode: 'BOX', unitName: 'BOX (박스)', description: '박스 단위', isActive: true, createdAt: '2025-01-01' },
  ];

  const initialItemMaterials: ItemMaterial[] = [
    { id: 'MAT-001', materialCode: 'EGI-1.2T', materialName: 'EGI 1.2T', materialType: 'STEEL', thickness: '1.2T', description: '전기아연도금강판', isActive: true, createdAt: '2025-01-01' },
    { id: 'MAT-002', materialCode: 'EGI-1.55T', materialName: 'EGI 1.55T', materialType: 'STEEL', thickness: '1.55T', description: '전기아연도금강판', isActive: true, createdAt: '2025-01-01' },
    { id: 'MAT-003', materialCode: 'EGI-2.0T', materialName: 'EGI 2.0T', materialType: 'STEEL', thickness: '2.0T', description: '전기아연도금강판', isActive: true, createdAt: '2025-01-01' },
    { id: 'MAT-004', materialCode: 'SUS-1.2T', materialName: 'SUS 1.2T', materialType: 'STEEL', thickness: '1.2T', description: '스테인리스 강판', isActive: true, createdAt: '2025-01-01' },
    { id: 'MAT-005', materialCode: 'SUS-1.5T', materialName: 'SUS 1.5T', materialType: 'STEEL', thickness: '1.5T', description: '스테인리스 강판', isActive: true, createdAt: '2025-01-01' },
    { id: 'MAT-006', materialCode: 'AL-6063', materialName: '알루미늄 6063', materialType: 'ALUMINUM', description: '알루미늄 압출재', isActive: true, createdAt: '2025-01-01' },
    { id: 'MAT-007', materialCode: 'AL-6061', materialName: '알루미늄 6061', materialType: 'ALUMINUM', description: '알루미늄 압출재', isActive: true, createdAt: '2025-01-01' },
  ];

  const initialSurfaceTreatments: SurfaceTreatment[] = [
    { id: 'TREAT-001', treatmentCode: 'NONE', treatmentName: '무도장', treatmentType: 'NONE', description: '표면처리 없음', isActive: true, createdAt: '2025-01-01' },
    { id: 'TREAT-002', treatmentCode: 'POWDER', treatmentName: '파우더도장', treatmentType: 'PAINTING', description: '분체도장', isActive: true, createdAt: '2025-01-01' },
    { id: 'TREAT-003', treatmentCode: 'ANODIZING', treatmentName: '아노다이징', treatmentType: 'COATING', description: '알루미늄 양극산화처리', isActive: true, createdAt: '2025-01-01' },
    { id: 'TREAT-004', treatmentCode: 'ZINC', treatmentName: '아연도금', treatmentType: 'PLATING', description: '아연 도금처리', isActive: true, createdAt: '2025-01-01' },
    { id: 'TREAT-005', treatmentCode: 'CHROME', treatmentName: '크롬도금', treatmentType: 'PLATING', description: '크롬 도금처리', isActive: true, createdAt: '2025-01-01' },
  ];

  const initialPartTypeOptions: PartTypeOption[] = [
    { id: 'PTYPE-001', partType: 'ASSEMBLY', optionCode: 'ASSY', optionName: '조립품', description: '여러 부품을 조립하는 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'PTYPE-002', partType: 'BENDING', optionCode: 'BEND', optionName: '절곡품', description: '절곡 가공 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'PTYPE-003', partType: 'PURCHASED', optionCode: 'PURCH', optionName: '구매품', description: '외부에서 구매하는 부품', isActive: true, createdAt: '2025-01-01' },
  ];

  const initialPartUsageOptions: PartUsageOption[] = [
    { id: 'USAGE-001', usageCode: 'GUIDE_RAIL', usageName: '가이드레일', description: '가이드레일용 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'USAGE-002', usageCode: 'BOTTOM_FINISH', usageName: '하단마감재', description: '하단마감재용 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'USAGE-003', usageCode: 'CASE', usageName: '케이스', description: '케이스용 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'USAGE-004', usageCode: 'DOOR', usageName: '도어', description: '도어용 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'USAGE-005', usageCode: 'BRACKET', usageName: '브라켓', description: '브라켓 부품', isActive: true, createdAt: '2025-01-01' },
    { id: 'USAGE-006', usageCode: 'GENERAL', usageName: '일반', description: '일반 부품', isActive: true, createdAt: '2025-01-01' },
  ];

  const initialGuideRailOptions: GuideRailOption[] = [
    { id: 'GR-001', optionType: 'MODEL_TYPE', optionCode: 'SCREEN', optionName: '스크린용', description: '스크린 셔터용 가이드레일', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-002', optionType: 'MODEL_TYPE', optionCode: 'STEEL', optionName: '철재용', description: '철재문용 가이드레일', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-011', optionType: 'MODEL', optionCode: 'T40', optionName: 'T40', parentOption: 'SCREEN', description: 'T40 모델', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-012', optionType: 'MODEL', optionCode: 'T60', optionName: 'T60', parentOption: 'SCREEN', description: 'T60 모델', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-013', optionType: 'MODEL', optionCode: 'PREMIUM', optionName: '프리미엄', parentOption: 'STEEL', description: '프리미엄 모델', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-021', optionType: 'CERTIFICATION', optionCode: 'KFI', optionName: 'KFI인증', description: 'KFI 인증', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-022', optionType: 'CERTIFICATION', optionCode: 'NONE', optionName: '미인증', description: '인증 없음', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-031', optionType: 'SHAPE', optionCode: 'ROUND', optionName: 'R형', description: '라운드형', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-032', optionType: 'SHAPE', optionCode: 'SQUARE', optionName: 'ㄱ형', description: '사각형', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-041', optionType: 'FINISH', optionCode: 'POWDER', optionName: '파우더도장', description: '파우더 도장 마감', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-042', optionType: 'FINISH', optionCode: 'ANODIZING', optionName: '아노다이징', description: '아노다이징 마감', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-051', optionType: 'LENGTH', optionCode: '3000', optionName: '3000mm', description: '3미터', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-052', optionType: 'LENGTH', optionCode: '4000', optionName: '4000mm', description: '4미터', isActive: true, createdAt: '2025-01-01' },
    { id: 'GR-053', optionType: 'LENGTH', optionCode: '5000', optionName: '5000mm', description: '5미터', isActive: true, createdAt: '2025-01-01' },
  ];

  const initialItemMasterFields: ItemMasterField[] = [
    {
      id: 'MASTER-001',
      name: '품목코드',
      fieldKey: 'itemCode',
      property: { inputType: 'textbox', required: true, row: 1, col: 1 },
      category: '공통',
      description: '품목의 고유 코드',
      isActive: true,
      createdAt: '2025-01-01'
    },
    {
      id: 'MASTER-002',
      name: '품목명',
      fieldKey: 'itemName',
      property: { inputType: 'textbox', required: true, row: 1, col: 1 },
      category: '공통',
      description: '품목의 이름',
      isActive: true,
      createdAt: '2025-01-01'
    },
    {
      id: 'MASTER-003',
      name: '단위',
      fieldKey: 'unit',
      property: { inputType: 'dropdown', required: true, row: 1, col: 1, options: ['EA', 'SET', 'KG', 'M', 'BOX'] },
      category: '공통',
      description: '품목의 단위',
      isActive: true,
      createdAt: '2025-01-01'
    },
    {
      id: 'MASTER-004',
      name: '재질',
      fieldKey: 'material',
      property: { inputType: 'dropdown', required: false, row: 1, col: 1, options: ['EGI 1.2T', 'SUS 1.2T', 'AL 1.5T'] },
      category: '부품',
      description: '부품의 재질',
      isActive: true,
      createdAt: '2025-01-01'
    },
    {
      id: 'MASTER-005',
      name: '표면처리',
      fieldKey: 'surfaceTreatment',
      property: { inputType: 'dropdown', required: false, row: 1, col: 1, options: ['무도장', '파우더도장', '아노다이징'] },
      category: '부품',
      description: '부품의 표면처리 방법',
      isActive: true,
      createdAt: '2025-01-01'
    }
  ];

  const initialItemPages: ItemPage[] = [];
  */

  // ✅ 빈 배열로 초기화 - API에서 데이터 로드 예정
  const initialSpecificationMasters: SpecificationMaster[] = [];
  const initialMaterialItemNames: MaterialItemName[] = [];
  const initialItemCategories: ItemCategory[] = [];
  const initialItemUnits: ItemUnit[] = [];
  const initialItemMaterials: ItemMaterial[] = [];
  const initialSurfaceTreatments: SurfaceTreatment[] = [];
  const initialPartTypeOptions: PartTypeOption[] = [];
  const initialPartUsageOptions: PartUsageOption[] = [];
  const initialGuideRailOptions: GuideRailOption[] = [];
  const initialItemMasterFields: ItemMasterField[] = [];
  const initialItemPages: ItemPage[] = [];

  // ===== Auth & Cache Setup =====
  const { currentUser } = useAuth();
  const tenantId = currentUser?.tenant?.id;

  // ✅ TenantAwareCache 인스턴스 생성 (tenant.id 기반, SSR-safe)
  const cache = useMemo(() => {
    // 서버 환경에서는 null 반환 (sessionStorage 없음)
    if (typeof window === 'undefined') return null;

    // 클라이언트 환경에서만 캐시 생성
    return tenantId ? new TenantAwareCache(tenantId, sessionStorage, 3600000) : null;
  }, [tenantId]);

  // ===== State Management (SSR-safe) =====
  const [itemMasters, setItemMasters] = useState<ItemMaster[]>(initialItemMasters);
  const [specificationMasters, setSpecificationMasters] = useState<SpecificationMaster[]>(initialSpecificationMasters);
  const [materialItemNames, setMaterialItemNames] = useState<MaterialItemName[]>(initialMaterialItemNames);
  const [itemCategories, setItemCategories] = useState<ItemCategory[]>(initialItemCategories);
  const [itemUnits, setItemUnits] = useState<ItemUnit[]>(initialItemUnits);
  const [itemMaterials, setItemMaterials] = useState<ItemMaterial[]>(initialItemMaterials);
  const [surfaceTreatments, setSurfaceTreatments] = useState<SurfaceTreatment[]>(initialSurfaceTreatments);
  const [partTypeOptions, setPartTypeOptions] = useState<PartTypeOption[]>(initialPartTypeOptions);
  const [partUsageOptions, setPartUsageOptions] = useState<PartUsageOption[]>(initialPartUsageOptions);
  const [guideRailOptions, setGuideRailOptions] = useState<GuideRailOption[]>(initialGuideRailOptions);
  const [sectionTemplates, setSectionTemplates] = useState<SectionTemplate[]>([]);
  const [itemMasterFields, setItemMasterFields] = useState<ItemMasterField[]>(initialItemMasterFields);
  const [itemPages, setItemPages] = useState<ItemPage[]>(initialItemPages);

  // ✅ TenantAwareCache에서 초기 데이터 로드
  useEffect(() => {
    if (!cache) return; // tenant.id 없으면 초기 데이터 유지

    // ItemMasters
    const cachedItemMasters = cache.get<ItemMaster[]>('itemMasters');
    if (cachedItemMasters) setItemMasters(cachedItemMasters);

    // SpecificationMasters (버전 체크)
    if (cache.isVersionMatch('specificationMasters', '1.0')) {
      const cachedSpecs = cache.get<SpecificationMaster[]>('specificationMasters');
      if (cachedSpecs) setSpecificationMasters(cachedSpecs);
    }

    // MaterialItemNames (버전 체크)
    if (cache.isVersionMatch('materialItemNames', '1.1')) {
      const cachedMaterials = cache.get<MaterialItemName[]>('materialItemNames');
      if (cachedMaterials) setMaterialItemNames(cachedMaterials);
    }

    // ItemCategories
    const cachedCategories = cache.get<ItemCategory[]>('itemCategories');
    if (cachedCategories) setItemCategories(cachedCategories);

    // ItemUnits
    const cachedUnits = cache.get<ItemUnit[]>('itemUnits');
    if (cachedUnits) setItemUnits(cachedUnits);

    // ItemMaterials
    const cachedMaterials = cache.get<ItemMaterial[]>('itemMaterials');
    if (cachedMaterials) setItemMaterials(cachedMaterials);

    // SurfaceTreatments
    const cachedTreatments = cache.get<SurfaceTreatment[]>('surfaceTreatments');
    if (cachedTreatments) setSurfaceTreatments(cachedTreatments);

    // PartTypeOptions
    const cachedPartTypes = cache.get<PartTypeOption[]>('partTypeOptions');
    if (cachedPartTypes) setPartTypeOptions(cachedPartTypes);

    // PartUsageOptions
    const cachedPartUsages = cache.get<PartUsageOption[]>('partUsageOptions');
    if (cachedPartUsages) setPartUsageOptions(cachedPartUsages);

    // GuideRailOptions
    const cachedGuideRails = cache.get<GuideRailOption[]>('guideRailOptions');
    if (cachedGuideRails) setGuideRailOptions(cachedGuideRails);

    // SectionTemplates
    const cachedTemplates = cache.get<SectionTemplate[]>('sectionTemplates');
    if (cachedTemplates) setSectionTemplates(cachedTemplates);

    // ItemMasterFields
    const cachedFields = cache.get<ItemMasterField[]>('itemMasterFields');
    if (cachedFields) setItemMasterFields(cachedFields);

    // ItemPages
    const cachedPages = cache.get<ItemPage[]>('itemPages');
    if (cachedPages) setItemPages(cachedPages);
  }, [cache]);

  // ✅ TenantAwareCache 동기화 (상태 변경 시 자동 저장)
  useEffect(() => {
    if (cache && itemMasters !== initialItemMasters) {
      cache.set('itemMasters', itemMasters);
    }
  }, [cache, itemMasters]);

  useEffect(() => {
    if (cache && specificationMasters !== initialSpecificationMasters) {
      cache.set('specificationMasters', specificationMasters, '1.0');
    }
  }, [cache, specificationMasters]);

  useEffect(() => {
    if (cache && materialItemNames !== initialMaterialItemNames) {
      cache.set('materialItemNames', materialItemNames, '1.1');
    }
  }, [cache, materialItemNames]);

  useEffect(() => {
    if (cache && itemCategories !== initialItemCategories) {
      cache.set('itemCategories', itemCategories);
    }
  }, [cache, itemCategories]);

  useEffect(() => {
    if (cache && itemUnits !== initialItemUnits) {
      cache.set('itemUnits', itemUnits);
    }
  }, [cache, itemUnits]);

  useEffect(() => {
    if (cache && itemMaterials !== initialItemMaterials) {
      cache.set('itemMaterials', itemMaterials);
    }
  }, [cache, itemMaterials]);

  useEffect(() => {
    if (cache && surfaceTreatments !== initialSurfaceTreatments) {
      cache.set('surfaceTreatments', surfaceTreatments);
    }
  }, [cache, surfaceTreatments]);

  useEffect(() => {
    if (cache && partTypeOptions !== initialPartTypeOptions) {
      cache.set('partTypeOptions', partTypeOptions);
    }
  }, [cache, partTypeOptions]);

  useEffect(() => {
    if (cache && partUsageOptions !== initialPartUsageOptions) {
      cache.set('partUsageOptions', partUsageOptions);
    }
  }, [cache, partUsageOptions]);

  useEffect(() => {
    if (cache && guideRailOptions !== initialGuideRailOptions) {
      cache.set('guideRailOptions', guideRailOptions);
    }
  }, [cache, guideRailOptions]);

  useEffect(() => {
    if (cache) {
      cache.set('sectionTemplates', sectionTemplates);
    }
  }, [cache, sectionTemplates]);

  useEffect(() => {
    if (cache && itemMasterFields !== initialItemMasterFields) {
      cache.set('itemMasterFields', itemMasterFields);
    }
  }, [cache, itemMasterFields]);

  useEffect(() => {
    if (cache && itemPages !== initialItemPages) {
      cache.set('itemPages', itemPages);
    }
  }, [cache, itemPages]);

  // ===== CRUD Functions =====

  // ItemMaster CRUD
  const addItemMaster = (item: ItemMaster) => {
    setItemMasters(prev => [...prev, item]);
  };

  const updateItemMaster = (id: string, updates: Partial<ItemMaster>) => {
    setItemMasters(prev => prev.map(item => item.id === id ? { ...item, ...updates } : item));
  };

  const deleteItemMaster = (id: string) => {
    setItemMasters(prev => prev.filter(item => item.id !== id));
  };

  // SpecificationMaster CRUD
  const addSpecificationMaster = (spec: SpecificationMaster) => {
    setSpecificationMasters(prev => [...prev, spec]);
  };

  const updateSpecificationMaster = (id: string, updates: Partial<SpecificationMaster>) => {
    setSpecificationMasters(prev => prev.map(spec => spec.id === id ? { ...spec, ...updates } : spec));
  };

  const deleteSpecificationMaster = (id: string) => {
    setSpecificationMasters(prev => prev.filter(spec => spec.id !== id));
  };

  // MaterialItemName CRUD
  const addMaterialItemName = (item: MaterialItemName) => {
    setMaterialItemNames(prev => [...prev, item]);
  };

  const updateMaterialItemName = (id: string, updates: Partial<MaterialItemName>) => {
    setMaterialItemNames(prev => prev.map(item => item.id === id ? { ...item, ...updates } : item));
  };

  const deleteMaterialItemName = (id: string) => {
    setMaterialItemNames(prev => prev.filter(item => item.id !== id));
  };

  // ItemCategory CRUD
  const addItemCategory = (category: ItemCategory) => {
    setItemCategories(prev => [...prev, category]);
  };

  const updateItemCategory = (id: string, updates: Partial<ItemCategory>) => {
    setItemCategories(prev => prev.map(cat => cat.id === id ? { ...cat, ...updates } : cat));
  };

  const deleteItemCategory = (id: string) => {
    setItemCategories(prev => prev.filter(cat => cat.id !== id));
  };

  // ItemUnit CRUD
  const addItemUnit = (unit: ItemUnit) => {
    setItemUnits(prev => [...prev, unit]);
  };

  const updateItemUnit = (id: string, updates: Partial<ItemUnit>) => {
    setItemUnits(prev => prev.map(unit => unit.id === id ? { ...unit, ...updates } : unit));
  };

  const deleteItemUnit = (id: string) => {
    setItemUnits(prev => prev.filter(unit => unit.id !== id));
  };

  // ItemMaterial CRUD
  const addItemMaterial = (material: ItemMaterial) => {
    setItemMaterials(prev => [...prev, material]);
  };

  const updateItemMaterial = (id: string, updates: Partial<ItemMaterial>) => {
    setItemMaterials(prev => prev.map(mat => mat.id === id ? { ...mat, ...updates } : mat));
  };

  const deleteItemMaterial = (id: string) => {
    setItemMaterials(prev => prev.filter(mat => mat.id !== id));
  };

  // SurfaceTreatment CRUD
  const addSurfaceTreatment = (treatment: SurfaceTreatment) => {
    setSurfaceTreatments(prev => [...prev, treatment]);
  };

  const updateSurfaceTreatment = (id: string, updates: Partial<SurfaceTreatment>) => {
    setSurfaceTreatments(prev => prev.map(treat => treat.id === id ? { ...treat, ...updates } : treat));
  };

  const deleteSurfaceTreatment = (id: string) => {
    setSurfaceTreatments(prev => prev.filter(treat => treat.id !== id));
  };

  // PartTypeOption CRUD
  const addPartTypeOption = (option: PartTypeOption) => {
    setPartTypeOptions(prev => [...prev, option]);
  };

  const updatePartTypeOption = (id: string, updates: Partial<PartTypeOption>) => {
    setPartTypeOptions(prev => prev.map(opt => opt.id === id ? { ...opt, ...updates } : opt));
  };

  const deletePartTypeOption = (id: string) => {
    setPartTypeOptions(prev => prev.filter(opt => opt.id !== id));
  };

  // PartUsageOption CRUD
  const addPartUsageOption = (option: PartUsageOption) => {
    setPartUsageOptions(prev => [...prev, option]);
  };

  const updatePartUsageOption = (id: string, updates: Partial<PartUsageOption>) => {
    setPartUsageOptions(prev => prev.map(opt => opt.id === id ? { ...opt, ...updates } : opt));
  };

  const deletePartUsageOption = (id: string) => {
    setPartUsageOptions(prev => prev.filter(opt => opt.id !== id));
  };

  // GuideRailOption CRUD
  const addGuideRailOption = (option: GuideRailOption) => {
    setGuideRailOptions(prev => [...prev, option]);
  };

  const updateGuideRailOption = (id: string, updates: Partial<GuideRailOption>) => {
    setGuideRailOptions(prev => prev.map(opt => opt.id === id ? { ...opt, ...updates } : opt));
  };

  const deleteGuideRailOption = (id: string) => {
    setGuideRailOptions(prev => prev.filter(opt => opt.id !== id));
  };

  // ItemMasterField CRUD (임시: 로컬 state)
  /**
   * 초기 데이터 로딩용: API 호출 없이 마스터 필드를 state에 로드 (덮어쓰기)
   */
  const loadItemMasterFields = (fields: ItemMasterField[]) => {
    setItemMasterFields(fields);
    console.log('[ItemMasterContext] 마스터 필드 로드 완료:', fields.length);
  };

  const addItemMasterField = async (field: Omit<ItemMasterField, 'id' | 'created_at' | 'updated_at'>) => {
    try {
      // API 호출
      const response = await itemMasterApi.masterFields.create({
        field_name: field.field_name,
        field_type: field.field_type,
        category: field.category ?? undefined,
        description: field.description ?? undefined,
        is_common: field.is_common,
        default_value: field.default_value ?? undefined,
        options: field.options ?? undefined,
        validation_rules: field.validation_rules ?? undefined,
        properties: field.properties ?? undefined,
      });

      if (!response.success || !response.data) {
        throw new Error(response.message || '마스터 필드 생성 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const newField: ItemMasterField = {
        id: response.data.id,
        tenant_id: response.data.tenant_id,
        field_name: response.data.field_name,
        field_type: response.data.field_type,
        category: response.data.category,
        description: response.data.description,
        is_common: response.data.is_common,
        default_value: response.data.default_value,
        options: response.data.options,
        validation_rules: response.data.validation_rules,
        properties: response.data.properties,
        created_by: response.data.created_by,
        updated_by: response.data.updated_by,
        created_at: response.data.created_at,
        updated_at: response.data.updated_at,
      };

      setItemMasterFields(prev => [...prev, newField]);
      console.log('[ItemMasterContext] 마스터 필드 생성 성공:', newField.id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 마스터 필드 생성 실패:', errorMessage);
      throw error;
    }
  };

  const updateItemMasterField = async (id: number, updates: Partial<ItemMasterField>) => {
    try {
      // API 호출
      const requestData: any = {};
      if (updates.field_name !== undefined) requestData.field_name = updates.field_name;
      if (updates.field_type !== undefined) requestData.field_type = updates.field_type;
      if (updates.category !== undefined) requestData.category = updates.category;
      if (updates.description !== undefined) requestData.description = updates.description;
      if (updates.is_common !== undefined) requestData.is_common = updates.is_common;
      if (updates.default_value !== undefined) requestData.default_value = updates.default_value;
      if (updates.options !== undefined) requestData.options = updates.options;
      if (updates.validation_rules !== undefined) requestData.validation_rules = updates.validation_rules;
      if (updates.properties !== undefined) requestData.properties = updates.properties;

      const response = await itemMasterApi.masterFields.update(id, requestData);

      if (!response.success || !response.data) {
        throw new Error(response.message || '마스터 필드 수정 실패');
      }

      // state 업데이트
      setItemMasterFields(prev => prev.map(field =>
        field.id === id ? {
          ...field,
          field_name: response.data!.field_name,
          field_type: response.data!.field_type,
          category: response.data!.category,
          description: response.data!.description,
          is_common: response.data!.is_common,
          default_value: response.data!.default_value,
          options: response.data!.options,
          validation_rules: response.data!.validation_rules,
          properties: response.data!.properties,
          updated_at: response.data!.updated_at,
        } : field
      ));

      console.log('[ItemMasterContext] 마스터 필드 수정 성공:', id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 마스터 필드 수정 실패:', errorMessage);
      throw error;
    }
  };

  const deleteItemMasterField = async (id: number) => {
    try {
      // API 호출
      const response = await itemMasterApi.masterFields.delete(id);

      if (!response.success) {
        throw new Error(response.message || '마스터 필드 삭제 실패');
      }

      // state 업데이트
      setItemMasterFields(prev => prev.filter(field => field.id !== id));
      console.log('[ItemMasterContext] 마스터 필드 삭제 성공:', id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 마스터 필드 삭제 실패:', errorMessage);
      throw error;
    }
  };

  // SectionTemplate CRUD with API
  /**
   * 초기 데이터 로딩용: API 호출 없이 섹션 템플릿을 state에 로드 (덮어쓰기)
   */
  const loadSectionTemplates = (templates: SectionTemplate[]) => {
    setSectionTemplates(templates);
    console.log('[ItemMasterContext] 섹션 템플릿 로드 완료:', templates.length);
  };

  const addSectionTemplate = async (template: Omit<SectionTemplate, 'id' | 'created_at' | 'updated_at'>) => {
    try {
      // 프론트엔드 형식 → API 형식 변환
      // template_name → title, section_type → type
      const apiType = template.section_type === 'BOM' ? 'bom' : 'fields';

      const response = await itemMasterApi.templates.create({
        title: template.template_name,
        type: apiType,
        description: template.description ?? undefined,
        is_default: false, // 기본값
      });

      if (!response.success || !response.data) {
        throw new Error(response.message || '섹션 템플릿 생성 실패');
      }

      // API 응답 → 프론트엔드 형식 변환
      // title → template_name, type → section_type
      const SECTION_TYPE_MAP: Record<string, 'BASIC' | 'BOM' | 'CUSTOM'> = {
        fields: 'BASIC',
        bom: 'BOM',
      };

      const newTemplate: SectionTemplate = {
        id: response.data.id,
        tenant_id: response.data.tenant_id,
        template_name: response.data.title,
        section_type: SECTION_TYPE_MAP[response.data.type] || 'BASIC',
        description: response.data.description,
        default_fields: null,
        category: template.category,
        fields: template.fields,
        bomItems: template.bomItems,
        created_by: response.data.created_by,
        updated_by: response.data.updated_by,
        created_at: response.data.created_at,
        updated_at: response.data.updated_at,
      };

      setSectionTemplates(prev => [...prev, newTemplate]);
      console.log('[ItemMasterContext] 섹션 템플릿 생성 성공:', newTemplate.id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 섹션 템플릿 생성 실패:', errorMessage);
      throw error;
    }
  };

  const updateSectionTemplate = async (id: number, updates: Partial<SectionTemplate>) => {
    try {
      // default_fields, fields, category, bomItems는 로컬에서만 관리 (API 미지원)
      const localOnlyUpdates = ['default_fields', 'fields', 'category', 'bomItems'];
      const hasApiUpdates = Object.keys(updates).some(key => !localOnlyUpdates.includes(key));
      const hasLocalUpdates = Object.keys(updates).some(key => localOnlyUpdates.includes(key));

      // API 호출이 필요한 경우에만 API 요청
      if (hasApiUpdates) {
        // API 요청 형식으로 변환 (frontend → API)
        // frontend: template_name, section_type
        // API: title, type
        const requestData: any = {};
        if (updates.template_name !== undefined) requestData.title = updates.template_name;
        if (updates.section_type !== undefined) {
          // section_type 변환: 'BASIC' | 'CUSTOM' → 'fields', 'BOM' → 'bom'
          requestData.type = updates.section_type === 'BOM' ? 'bom' : 'fields';
        }
        if (updates.description !== undefined) requestData.description = updates.description;

        const response = await itemMasterApi.templates.update(id, requestData);

        if (!response.success || !response.data) {
          throw new Error(response.message || '섹션 템플릿 수정 실패');
        }

        // state 업데이트 (API 응답 → frontend 형식으로 변환)
        // API 응답: title, type ('fields' | 'bom')
        // Frontend 형식: template_name, section_type ('BASIC' | 'BOM' | 'CUSTOM')
        const SECTION_TYPE_MAP: Record<string, 'BASIC' | 'BOM' | 'CUSTOM'> = {
          fields: 'BASIC',
          bom: 'BOM',
        };

        setSectionTemplates(prev => prev.map(template =>
          template.id === id ? {
            ...template,
            template_name: response.data!.title,
            section_type: SECTION_TYPE_MAP[response.data!.type] || 'BASIC',
            description: response.data!.description,
            updated_at: response.data!.updated_at,
          } : template
        ));

        console.log('[ItemMasterContext] 섹션 템플릿 수정 성공 (API):', id);
      }

      // 로컬 전용 필드 업데이트 (default_fields, fields, category, bomItems)
      if (hasLocalUpdates) {
        setSectionTemplates(prev => prev.map(template => {
          if (template.id !== id) return template;

          const updatedTemplate = { ...template };

          // default_fields 업데이트 시 fields도 같이 업데이트
          if (updates.default_fields !== undefined) {
            updatedTemplate.default_fields = updates.default_fields;
            updatedTemplate.fields = updates.default_fields as TemplateField[];
          }
          if (updates.fields !== undefined) {
            updatedTemplate.fields = updates.fields;
            updatedTemplate.default_fields = updates.fields;
          }
          if (updates.category !== undefined) {
            updatedTemplate.category = updates.category;
          }
          if (updates.bomItems !== undefined) {
            updatedTemplate.bomItems = updates.bomItems;
          }

          return updatedTemplate;
        }));

        console.log('[ItemMasterContext] 섹션 템플릿 수정 성공 (로컬):', id, Object.keys(updates).filter(k => localOnlyUpdates.includes(k)));
      }
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 섹션 템플릿 수정 실패:', errorMessage);
      throw error;
    }
  };

  const deleteSectionTemplate = async (id: number) => {
    try {
      // API 호출
      const response = await itemMasterApi.templates.delete(id);

      if (!response.success) {
        throw new Error(response.message || '섹션 템플릿 삭제 실패');
      }

      // state 업데이트
      setSectionTemplates(prev => prev.filter(template => template.id !== id));
      console.log('[ItemMasterContext] 섹션 템플릿 삭제 성공:', id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 섹션 템플릿 삭제 실패:', errorMessage);
      throw error;
    }
  };

  // ItemPage CRUD with API

  /**
   * 초기 데이터 로딩용: API 호출 없이 페이지 데이터를 state에 로드 (덮어쓰기)
   * (이미 백엔드에서 받아온 데이터를 로드할 때 사용)
   */
  const loadItemPages = (pages: ItemPage[]) => {
    setItemPages(pages);  // 덮어쓰기 (append가 아님!)
    console.log('[ItemMasterContext] 페이지 데이터 로드 완료:', pages.length);
  };

  /**
   * 새 페이지 생성: API 호출 + state 업데이트
   * (사용자가 새 페이지를 만들 때 사용)
   * @returns 생성된 페이지 반환
   */
  const addItemPage = async (pageData: Omit<ItemPage, 'id' | 'created_at' | 'updated_at'>): Promise<ItemPage> => {
    try {
      // API 요청 데이터 변환
      const requestData: ItemPageRequest = {
        page_name: pageData.page_name,
        item_type: pageData.item_type,
        absolute_path: pageData.absolute_path || '',
      };

      // API 호출
      const response = await itemMasterApi.pages.create(requestData);

      // 응답 데이터 변환 및 state 업데이트
      const newPage = transformPageResponse(response);
      setItemPages(prev => [...prev, newPage]);

      console.log('[ItemMasterContext] 페이지 생성 성공:', newPage);
      return newPage;
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 페이지 생성 실패:', errorMessage);
      throw error;
    }
  };

  const updateItemPage = async (id: number, updates: Partial<ItemPage>) => {
    try {
      // API 요청 데이터 변환
      const requestData: Partial<ItemPageRequest> = {};
      if (updates.page_name) requestData.page_name = updates.page_name;
      if (updates.absolute_path !== undefined) requestData.absolute_path = updates.absolute_path;

      // API 호출
      const response = await itemMasterApi.pages.update(id, requestData);

      if (!response.success || !response.data) {
        throw new Error(response.message || '페이지 수정 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const updatedPage = transformPageResponse(response.data);
      setItemPages(prev => prev.map(page => page.id === id ? updatedPage : page));

      console.log('[ItemMasterContext] 페이지 수정 성공:', updatedPage);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 페이지 수정 실패:', errorMessage);
      throw error;
    }
  };

  const deleteItemPage = async (id: number) => {
    try {
      // API 호출
      const response = await itemMasterApi.pages.delete(id);

      if (!response.success) {
        throw new Error(response.message || '페이지 삭제 실패');
      }

      // state 업데이트
      setItemPages(prev => prev.filter(page => page.id !== id));

      console.log('[ItemMasterContext] 페이지 삭제 성공:', id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 페이지 삭제 실패:', errorMessage);
      throw error;
    }
  };

  const reorderPages = async (newOrder: Array<{ id: number; order_no: number }>) => {
    try {
      // Optimistic UI 업데이트 (즉시 반영)
      setItemPages(prev => {
        const updated = [...prev];
        updated.sort((a, b) => {
          const orderA = newOrder.find(o => o.id === a.id)?.order_no ?? 0;
          const orderB = newOrder.find(o => o.id === b.id)?.order_no ?? 0;
          return orderA - orderB;
        });
        return updated.map(page => {
          const newOrderNo = newOrder.find(o => o.id === page.id)?.order_no;
          return newOrderNo !== undefined ? { ...page, order_no: newOrderNo } : page;
        });
      });

      // API 호출
      const response = await itemMasterApi.pages.reorder({ page_orders: newOrder });

      if (!response.success || !response.data) {
        throw new Error(response.message || '페이지 순서 변경 실패');
      }

      // API 응답으로 최종 업데이트
      const reorderedPages = response.data.map(transformPageResponse);
      setItemPages(reorderedPages);

      console.log('[ItemMasterContext] 페이지 순서 변경 성공');
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 페이지 순서 변경 실패:', errorMessage);

      // 실패 시 이전 상태로 롤백
      // 여기서는 페이지 전체를 다시 로드하는 것이 더 안전할 수 있음
      throw error;
    }
  };

  // Section CRUD with API
  const addSectionToPage = async (pageId: number, sectionData: Omit<ItemSection, 'id' | 'created_at' | 'updated_at'>) => {
    try {
      // API 호출
      const response = await itemMasterApi.sections.create(pageId, {
        title: sectionData.section_name,
        type: sectionData.section_type === 'BOM' ? 'bom' : 'fields',
      });

      if (!response.success || !response.data) {
        throw new Error(response.message || '섹션 생성 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const newSection = transformSectionResponse(response.data);
      setItemPages(prev => prev.map(page =>
        page.id === pageId
          ? { ...page, sections: [...page.sections, newSection] }
          : page
      ));

      console.log('[ItemMasterContext] 섹션 생성 성공:', newSection);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 섹션 생성 실패:', errorMessage);
      throw error;
    }
  };

  const updateSection = async (sectionId: number, updates: Partial<ItemSection>) => {
    try {
      // API 요청 데이터 변환
      const requestData: any = {};
      if (updates.section_name) requestData.title = updates.section_name;

      // API 호출
      const response = await itemMasterApi.sections.update(sectionId, requestData);

      if (!response.success || !response.data) {
        throw new Error(response.message || '섹션 수정 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const updatedSection = transformSectionResponse(response.data);
      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section =>
          section.id === sectionId ? updatedSection : section
        )
      })));

      console.log('[ItemMasterContext] 섹션 수정 성공:', updatedSection);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 섹션 수정 실패:', errorMessage);
      throw error;
    }
  };

  const deleteSection = async (sectionId: number) => {
    try {
      // API 호출
      const response = await itemMasterApi.sections.delete(sectionId);

      if (!response.success) {
        throw new Error(response.message || '섹션 삭제 실패');
      }

      // state 업데이트
      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.filter(section => section.id !== sectionId)
      })));

      console.log('[ItemMasterContext] 섹션 삭제 성공:', sectionId);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 섹션 삭제 실패:', errorMessage);
      throw error;
    }
  };

  const reorderSections = async (pageId: number, sectionIds: number[]) => {
    try {
      // API 호출
      const response = await itemMasterApi.sections.reorder(pageId, {
        section_orders: sectionIds.map((id, index) => ({ id, order_no: index }))
      });

      if (!response.success || !response.data) {
        throw new Error(response.message || '섹션 순서 변경 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const reorderedSections = response.data.map(transformSectionResponse);
      setItemPages(prev => prev.map(page =>
        page.id === pageId
          ? { ...page, sections: reorderedSections }
          : page
      ));

      console.log('[ItemMasterContext] 섹션 순서 변경 성공');
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 섹션 순서 변경 실패:', errorMessage);
      throw error;
    }
  };

  // Field CRUD with API
  const addFieldToSection = async (sectionId: number, fieldData: Omit<ItemField, 'id' | 'created_at' | 'updated_at'>) => {
    try {
      // API 호출 (null → undefined 변환)
      const response = await itemMasterApi.fields.create(sectionId, {
        field_name: fieldData.field_name,
        field_type: fieldData.field_type,
        is_required: fieldData.is_required,
        default_value: fieldData.default_value ?? undefined,
        placeholder: fieldData.placeholder ?? undefined,
        display_condition: fieldData.display_condition ?? undefined,
        validation_rules: fieldData.validation_rules ?? undefined,
        options: fieldData.options ?? undefined,
        properties: fieldData.properties ?? undefined,
      });

      if (!response.success || !response.data) {
        throw new Error(response.message || '필드 생성 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const newField: ItemField = {
        id: response.data.id,
        tenant_id: response.data.tenant_id,
        section_id: response.data.section_id,
        master_field_id: response.data.master_field_id,
        field_name: response.data.field_name,
        field_type: response.data.field_type,
        order_no: response.data.order_no,
        is_required: response.data.is_required,
        default_value: response.data.default_value,
        placeholder: response.data.placeholder,
        display_condition: response.data.display_condition,
        validation_rules: response.data.validation_rules,
        options: response.data.options,
        properties: response.data.properties,
        created_at: response.data.created_at,
        updated_at: response.data.updated_at,
      };

      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section =>
          section.id === sectionId
            ? { ...section, fields: [...(section.fields || []), newField] }
            : section
        )
      })));

      console.log('[ItemMasterContext] 필드 생성 성공:', newField.id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 필드 생성 실패:', errorMessage);
      throw error;
    }
  };

  const updateField = async (fieldId: number, updates: Partial<ItemField>) => {
    try {
      // API 호출 (null → undefined 변환)
      // 주의: display_condition은 현재 백엔드에서 지원하는 형식과 프론트엔드 형식이 다르므로 API에 전송하지 않음
      // 백엔드 형식: {"field_id": "1", "operator": "equals", "value": "true"}
      // 프론트엔드 형식: {"targetType": "field", "fieldConditions": [...], "sectionIds": [...]}
      const requestData: any = {};
      if (updates.field_name !== undefined) requestData.field_name = updates.field_name;
      if (updates.field_type !== undefined) requestData.field_type = updates.field_type;
      if (updates.is_required !== undefined) requestData.is_required = updates.is_required;
      if (updates.default_value !== undefined) requestData.default_value = updates.default_value ?? undefined;
      if (updates.placeholder !== undefined) requestData.placeholder = updates.placeholder ?? undefined;
      // display_condition은 API 형식 불일치로 전송하지 않음 (로컬 상태에서만 관리)
      if (updates.validation_rules !== undefined) requestData.validation_rules = updates.validation_rules ?? undefined;
      if (updates.options !== undefined) requestData.options = updates.options ?? undefined;
      if (updates.properties !== undefined) requestData.properties = updates.properties ?? undefined;

      const response = await itemMasterApi.fields.update(fieldId, requestData);

      if (!response.success || !response.data) {
        throw new Error(response.message || '필드 수정 실패');
      }

      // state 업데이트
      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section => ({
          ...section,
          fields: (section.fields || []).map(field =>
            field.id === fieldId ? {
              ...field,
              field_name: response.data!.field_name,
              field_type: response.data!.field_type,
              is_required: response.data!.is_required,
              default_value: response.data!.default_value,
              placeholder: response.data!.placeholder,
              display_condition: response.data!.display_condition,
              validation_rules: response.data!.validation_rules,
              options: response.data!.options,
              properties: response.data!.properties,
              updated_at: response.data!.updated_at,
            } : field
          )
        }))
      })));

      console.log('[ItemMasterContext] 필드 수정 성공:', fieldId);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 필드 수정 실패:', errorMessage);
      throw error;
    }
  };

  const deleteField = async (fieldId: number) => {
    try {
      // API 호출
      const response = await itemMasterApi.fields.delete(fieldId);

      if (!response.success) {
        throw new Error(response.message || '필드 삭제 실패');
      }

      // state 업데이트
      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section => ({
          ...section,
          fields: (section.fields || []).filter(field => field.id !== fieldId)
        }))
      })));

      console.log('[ItemMasterContext] 필드 삭제 성공:', fieldId);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 필드 삭제 실패:', errorMessage);
      throw error;
    }
  };

  const reorderFields = async (sectionId: number, fieldIds: number[]) => {
    try {
      // API 호출
      const response = await itemMasterApi.fields.reorder(sectionId, {
        field_orders: fieldIds.map((id, index) => ({ id, order_no: index }))
      });

      if (!response.success || !response.data) {
        throw new Error(response.message || '필드 순서 변경 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const reorderedFields = response.data.map(fieldResponse => ({
        id: fieldResponse.id,
        tenant_id: fieldResponse.tenant_id,
        section_id: fieldResponse.section_id,
        master_field_id: fieldResponse.master_field_id,
        field_name: fieldResponse.field_name,
        field_type: fieldResponse.field_type,
        order_no: fieldResponse.order_no,
        is_required: fieldResponse.is_required,
        default_value: fieldResponse.default_value,
        placeholder: fieldResponse.placeholder,
        display_condition: fieldResponse.display_condition,
        validation_rules: fieldResponse.validation_rules,
        options: fieldResponse.options,
        properties: fieldResponse.properties,
        created_at: fieldResponse.created_at,
        updated_at: fieldResponse.updated_at,
      }));

      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section =>
          section.id === sectionId
            ? { ...section, fields: reorderedFields }
            : section
        )
      })));

      console.log('[ItemMasterContext] 필드 순서 변경 성공');
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] 필드 순서 변경 실패:', errorMessage);
      throw error;
    }
  };

  // BOM CRUD with API
  const addBOMItem = async (sectionId: number, bomData: Omit<BOMItem, 'id' | 'created_at' | 'updated_at'>) => {
    try {
      // API 호출 (null → undefined 변환)
      const response = await itemMasterApi.bomItems.create(sectionId, {
        item_code: bomData.item_code ?? undefined,
        item_name: bomData.item_name,
        quantity: bomData.quantity,
        unit: bomData.unit ?? undefined,
        unit_price: bomData.unit_price ?? undefined,
        total_price: bomData.total_price ?? undefined,
        spec: bomData.spec ?? undefined,
        note: bomData.note ?? undefined,
      });

      if (!response.success || !response.data) {
        throw new Error(response.message || 'BOM 항목 생성 실패');
      }

      // 응답 데이터 변환 및 state 업데이트
      const newBOM: BOMItem = {
        id: response.data.id,
        tenant_id: response.data.tenant_id,
        section_id: response.data.section_id,
        item_code: response.data.item_code,
        item_name: response.data.item_name,
        quantity: response.data.quantity,
        unit: response.data.unit,
        unit_price: response.data.unit_price,
        total_price: response.data.total_price,
        spec: response.data.spec,
        note: response.data.note,
        created_at: response.data.created_at,
        updated_at: response.data.updated_at,
      };

      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section =>
          section.id === sectionId
            ? { ...section, bomItems: [...(section.bomItems || []), newBOM] }
            : section
        )
      })));

      console.log('[ItemMasterContext] BOM 항목 생성 성공:', newBOM.id);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] BOM 항목 생성 실패:', errorMessage);
      throw error;
    }
  };

  const updateBOMItem = async (bomId: number, updates: Partial<BOMItem>) => {
    try {
      // API 호출 (null → undefined 변환)
      const requestData: any = {};
      if (updates.item_code !== undefined) requestData.item_code = updates.item_code ?? undefined;
      if (updates.item_name !== undefined) requestData.item_name = updates.item_name;
      if (updates.quantity !== undefined) requestData.quantity = updates.quantity;
      if (updates.unit !== undefined) requestData.unit = updates.unit ?? undefined;
      if (updates.unit_price !== undefined) requestData.unit_price = updates.unit_price ?? undefined;
      if (updates.total_price !== undefined) requestData.total_price = updates.total_price ?? undefined;
      if (updates.spec !== undefined) requestData.spec = updates.spec ?? undefined;
      if (updates.note !== undefined) requestData.note = updates.note ?? undefined;

      const response = await itemMasterApi.bomItems.update(bomId, requestData);

      if (!response.success || !response.data) {
        throw new Error(response.message || 'BOM 항목 수정 실패');
      }

      // state 업데이트
      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section => ({
          ...section,
          bomItems: (section.bomItems || []).map(bom =>
            bom.id === bomId ? {
              ...bom,
              item_code: response.data!.item_code,
              item_name: response.data!.item_name,
              quantity: response.data!.quantity,
              unit: response.data!.unit,
              unit_price: response.data!.unit_price,
              total_price: response.data!.total_price,
              spec: response.data!.spec,
              note: response.data!.note,
              updated_at: response.data!.updated_at,
            } : bom
          )
        }))
      })));

      console.log('[ItemMasterContext] BOM 항목 수정 성공:', bomId);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] BOM 항목 수정 실패:', errorMessage);
      throw error;
    }
  };

  const deleteBOMItem = async (bomId: number) => {
    try {
      // API 호출
      const response = await itemMasterApi.bomItems.delete(bomId);

      if (!response.success) {
        throw new Error(response.message || 'BOM 항목 삭제 실패');
      }

      // state 업데이트
      setItemPages(prev => prev.map(page => ({
        ...page,
        sections: page.sections.map(section => ({
          ...section,
          bomItems: (section.bomItems || []).filter(bom => bom.id !== bomId)
        }))
      })));

      console.log('[ItemMasterContext] BOM 항목 삭제 성공:', bomId);
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      console.error('[ItemMasterContext] BOM 항목 삭제 실패:', errorMessage);
      throw error;
    }
  };

  // 캐시 및 데이터 초기화 함수
  const clearCache = () => {
    if (cache) {
      cache.clear();
      console.log('[ItemMasterContext] TenantAwareCache cleared');
    }
  };

  const resetAllData = () => {
    // 모든 state를 초기값으로 reset
    setItemMasters(initialItemMasters);
    setSpecificationMasters(initialSpecificationMasters);
    setMaterialItemNames(initialMaterialItemNames);
    setItemCategories(initialItemCategories);
    setItemUnits(initialItemUnits);
    setItemMaterials(initialItemMaterials);
    setSurfaceTreatments(initialSurfaceTreatments);
    setPartTypeOptions(initialPartTypeOptions);
    setPartUsageOptions(initialPartUsageOptions);
    setGuideRailOptions(initialGuideRailOptions);
    setSectionTemplates([]);
    setItemMasterFields(initialItemMasterFields);
    setItemPages(initialItemPages);

    // TenantAwareCache도 정리
    clearCache();

    console.log('[ItemMasterContext] All data reset to initial state');
  };

  // Context value
  const value: ItemMasterContextType = {
    itemMasters,
    addItemMaster,
    updateItemMaster,
    deleteItemMaster,

    specificationMasters,
    addSpecificationMaster,
    updateSpecificationMaster,
    deleteSpecificationMaster,

    materialItemNames,
    addMaterialItemName,
    updateMaterialItemName,
    deleteMaterialItemName,

    itemMasterFields,
    loadItemMasterFields,
    addItemMasterField,
    updateItemMasterField,
    deleteItemMasterField,

    sectionTemplates,
    loadSectionTemplates,
    addSectionTemplate,
    updateSectionTemplate,
    deleteSectionTemplate,

    itemPages,
    loadItemPages,
    addItemPage,
    updateItemPage,
    deleteItemPage,
    reorderPages,
    addSectionToPage,
    updateSection,
    deleteSection,
    reorderSections,
    addFieldToSection,
    updateField,
    deleteField,
    reorderFields,

    addBOMItem,
    updateBOMItem,
    deleteBOMItem,

    itemCategories,
    itemUnits,
    itemMaterials,
    surfaceTreatments,
    partTypeOptions,
    partUsageOptions,
    guideRailOptions,

    addItemCategory,
    updateItemCategory,
    deleteItemCategory,

    addItemUnit,
    updateItemUnit,
    deleteItemUnit,

    addItemMaterial,
    updateItemMaterial,
    deleteItemMaterial,

    addSurfaceTreatment,
    updateSurfaceTreatment,
    deleteSurfaceTreatment,

    addPartTypeOption,
    updatePartTypeOption,
    deletePartTypeOption,

    addPartUsageOption,
    updatePartUsageOption,
    deletePartUsageOption,

    addGuideRailOption,
    updateGuideRailOption,
    deleteGuideRailOption,

    clearCache,
    resetAllData,

    tenantId,
  };

  return (
    <ItemMasterContext.Provider value={value}>
      {children}
    </ItemMasterContext.Provider>
  );
}

// Custom hook
export function useItemMaster() {
  const context = useContext(ItemMasterContext);
  if (context === undefined) {
    throw new Error('useItemMaster must be used within an ItemMasterProvider');
  }
  return context;
}