'use client';

import { useState, useEffect, useRef } from 'react';
import { toast } from 'sonner';
import { useItemMaster } from '@/contexts/ItemMasterContext';
import type { MasterOption, OptionColumn } from '../types';
import { attributeService } from '../services';

export interface UseAttributeManagementReturn {
  // 속성 옵션 상태
  unitOptions: MasterOption[];
  setUnitOptions: React.Dispatch<React.SetStateAction<MasterOption[]>>;
  materialOptions: MasterOption[];
  setMaterialOptions: React.Dispatch<React.SetStateAction<MasterOption[]>>;
  surfaceTreatmentOptions: MasterOption[];
  setSurfaceTreatmentOptions: React.Dispatch<React.SetStateAction<MasterOption[]>>;
  customAttributeOptions: Record<string, MasterOption[]>;
  setCustomAttributeOptions: React.Dispatch<React.SetStateAction<Record<string, MasterOption[]>>>;

  // 옵션 다이얼로그 상태
  isOptionDialogOpen: boolean;
  setIsOptionDialogOpen: (open: boolean) => void;
  editingOptionType: string | null;
  setEditingOptionType: (type: string | null) => void;

  // 옵션 폼 상태
  newOptionValue: string;
  setNewOptionValue: (value: string) => void;
  newOptionLabel: string;
  setNewOptionLabel: (label: string) => void;
  newOptionColumnValues: Record<string, string>;
  setNewOptionColumnValues: React.Dispatch<React.SetStateAction<Record<string, string>>>;
  newOptionInputType: 'textbox' | 'dropdown' | 'checkbox' | 'number' | 'date' | 'textarea';
  setNewOptionInputType: (type: 'textbox' | 'dropdown' | 'checkbox' | 'number' | 'date' | 'textarea') => void;
  newOptionRequired: boolean;
  setNewOptionRequired: (required: boolean) => void;
  newOptionOptions: string;
  setNewOptionOptions: (options: string) => void;
  newOptionPlaceholder: string;
  setNewOptionPlaceholder: (placeholder: string) => void;
  newOptionDefaultValue: string;
  setNewOptionDefaultValue: (value: string) => void;

  // 칼럼 관리 상태
  isColumnManageDialogOpen: boolean;
  setIsColumnManageDialogOpen: (open: boolean) => void;
  managingColumnType: string | null;
  setManagingColumnType: (type: string | null) => void;
  attributeColumns: Record<string, OptionColumn[]>;
  setAttributeColumns: React.Dispatch<React.SetStateAction<Record<string, OptionColumn[]>>>;

  // 칼럼 폼 상태
  newColumnName: string;
  setNewColumnName: (name: string) => void;
  newColumnKey: string;
  setNewColumnKey: (key: string) => void;
  newColumnType: 'text' | 'number';
  setNewColumnType: (type: 'text' | 'number') => void;
  newColumnRequired: boolean;
  setNewColumnRequired: (required: boolean) => void;

  // 핸들러
  handleAddOption: () => void;
  handleDeleteOption: (type: string, id: string) => void;
  handleAddColumn: () => void;
  handleDeleteColumn: (columnKey: string) => void;
  resetOptionForm: () => void;
  resetColumnForm: () => void;
}

export function useAttributeManagement(): UseAttributeManagementReturn {
  const {
    itemMasterFields,
    updateItemMasterField
  } = useItemMaster();

  // 속성 옵션 상태 (기본값 하드코딩 - TODO: 나중에 백엔드 API로 대체)
  const [unitOptions, setUnitOptions] = useState<MasterOption[]>([
    { id: 'unit-1', value: 'EA', label: 'EA (개)', isActive: true },
    { id: 'unit-2', value: 'KG', label: 'KG (킬로그램)', isActive: true },
    { id: 'unit-3', value: 'M', label: 'M (미터)', isActive: true },
    { id: 'unit-4', value: 'MM', label: 'MM (밀리미터)', isActive: true },
    { id: 'unit-5', value: 'L', label: 'L (리터)', isActive: true },
    { id: 'unit-6', value: 'SET', label: 'SET (세트)', isActive: true },
    { id: 'unit-7', value: 'BOX', label: 'BOX (박스)', isActive: true },
    { id: 'unit-8', value: 'ROLL', label: 'ROLL (롤)', isActive: true },
  ]);
  const [materialOptions, setMaterialOptions] = useState<MasterOption[]>([
    { id: 'mat-1', value: 'SUS304', label: 'SUS304 (스테인리스)', isActive: true },
    { id: 'mat-2', value: 'SUS316', label: 'SUS316 (스테인리스)', isActive: true },
    { id: 'mat-3', value: 'AL6061', label: 'AL6061 (알루미늄)', isActive: true },
    { id: 'mat-4', value: 'AL5052', label: 'AL5052 (알루미늄)', isActive: true },
    { id: 'mat-5', value: 'SS400', label: 'SS400 (일반강)', isActive: true },
    { id: 'mat-6', value: 'S45C', label: 'S45C (탄소강)', isActive: true },
    { id: 'mat-7', value: 'POM', label: 'POM (폴리아세탈)', isActive: true },
    { id: 'mat-8', value: 'PEEK', label: 'PEEK (폴리에테르에테르케톤)', isActive: true },
  ]);
  const [surfaceTreatmentOptions, setSurfaceTreatmentOptions] = useState<MasterOption[]>([
    { id: 'surf-1', value: 'NONE', label: '없음', isActive: true },
    { id: 'surf-2', value: 'ANODIZE', label: '아노다이징', isActive: true },
    { id: 'surf-3', value: 'PLATING', label: '도금', isActive: true },
    { id: 'surf-4', value: 'PAINTING', label: '도장', isActive: true },
    { id: 'surf-5', value: 'PASSIVATION', label: '부동태처리', isActive: true },
    { id: 'surf-6', value: 'SANDBLAST', label: '샌드블라스트', isActive: true },
    { id: 'surf-7', value: 'POLISHING', label: '폴리싱', isActive: true },
  ]);
  const [customAttributeOptions, setCustomAttributeOptions] = useState<Record<string, MasterOption[]>>({});

  // 옵션 다이얼로그 상태
  const [isOptionDialogOpen, setIsOptionDialogOpen] = useState(false);
  const [editingOptionType, setEditingOptionType] = useState<string | null>(null);

  // 옵션 폼 상태
  const [newOptionValue, setNewOptionValue] = useState('');
  const [newOptionLabel, setNewOptionLabel] = useState('');
  const [newOptionColumnValues, setNewOptionColumnValues] = useState<Record<string, string>>({});
  const [newOptionInputType, setNewOptionInputType] = useState<'textbox' | 'dropdown' | 'checkbox' | 'number' | 'date' | 'textarea'>('textbox');
  const [newOptionRequired, setNewOptionRequired] = useState(false);
  const [newOptionOptions, setNewOptionOptions] = useState('');
  const [newOptionPlaceholder, setNewOptionPlaceholder] = useState('');
  const [newOptionDefaultValue, setNewOptionDefaultValue] = useState('');

  // 칼럼 관리 상태
  const [isColumnManageDialogOpen, setIsColumnManageDialogOpen] = useState(false);
  const [managingColumnType, setManagingColumnType] = useState<string | null>(null);
  const [attributeColumns, setAttributeColumns] = useState<Record<string, OptionColumn[]>>({});

  // 칼럼 폼 상태
  const [newColumnName, setNewColumnName] = useState('');
  const [newColumnKey, setNewColumnKey] = useState('');
  const [newColumnType, setNewColumnType] = useState<'text' | 'number'>('text');
  const [newColumnRequired, setNewColumnRequired] = useState(false);

  // 이전 옵션 값 추적용 ref (무한 루프 방지)
  const prevOptionsRef = useRef<string>('');

  // 속성 변경 시 연동된 마스터 항목의 옵션 자동 업데이트
  // 주의: itemMasterFields를 의존성에서 제거하여 무한 루프 방지
  useEffect(() => {
    // 현재 옵션 상태를 문자열로 직렬화
    const currentOptionsState = JSON.stringify({
      unit: unitOptions.map(o => o.label).sort(),
      material: materialOptions.map(o => o.label).sort(),
      surface: surfaceTreatmentOptions.map(o => o.label).sort(),
      custom: Object.keys(customAttributeOptions).reduce((acc, key) => {
        acc[key] = (customAttributeOptions[key] || []).map(o => o.label).sort();
        return acc;
      }, {} as Record<string, string[]>)
    });

    // 이전 상태와 동일하면 업데이트 스킵
    if (prevOptionsRef.current === currentOptionsState) {
      return;
    }
    prevOptionsRef.current = currentOptionsState;

    // 실제 업데이트가 필요한 경우만 처리
    itemMasterFields.forEach(field => {
      // properties가 null/undefined인 경우 스킵
      if (!field.properties) return;
      const attributeType = (field.properties as any).attributeType;
      if (attributeType && attributeType !== 'custom' && (field.properties as any)?.inputType === 'dropdown') {
        let newOptions: string[] = [];

        if (attributeType === 'unit') {
          newOptions = unitOptions.map(opt => opt.label);
        } else if (attributeType === 'material') {
          newOptions = materialOptions.map(opt => opt.label);
        } else if (attributeType === 'surface') {
          newOptions = surfaceTreatmentOptions.map(opt => opt.label);
        } else {
          const customOpts = customAttributeOptions[attributeType] || [];
          newOptions = customOpts.map(opt => opt.label);
        }

        const currentOptions = (field.properties as any)?.options || [];
        const optionsChanged = JSON.stringify([...currentOptions].sort()) !== JSON.stringify([...newOptions].sort());

        if (optionsChanged && newOptions.length > 0) {
          updateItemMasterField(field.id, {
            properties: {
              ...(field.properties || {}),
              options: newOptions
            }
          });
        }
      }
    });
  // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [unitOptions, materialOptions, surfaceTreatmentOptions, customAttributeOptions]);

  // 옵션 추가
  const handleAddOption = () => {
    if (!editingOptionType || !newOptionValue.trim() || !newOptionLabel.trim()) {
      toast.error('모든 항목을 입력해주세요');
      return;
    }

    // dropdown일 경우 옵션 필수 체크
    if (newOptionInputType === 'dropdown' && !newOptionOptions.trim()) {
      toast.error('드롭다운 옵션을 입력해주세요');
      return;
    }

    // 칼럼 필수 값 체크
    const currentColumns = attributeColumns[editingOptionType] || [];
    for (const column of currentColumns) {
      if (column.required && !newOptionColumnValues[column.key]?.trim()) {
        toast.error(`${column.name}은(는) 필수 입력 항목입니다`);
        return;
      }
    }

    const newOption: MasterOption = {
      id: `${editingOptionType}-${Date.now()}`,
      value: newOptionValue,
      label: newOptionLabel,
      isActive: true,
      inputType: newOptionInputType,
      required: newOptionRequired,
      options: newOptionInputType === 'dropdown' ? newOptionOptions.split(',').map(o => o.trim()).filter(o => o) : undefined,
      placeholder: newOptionPlaceholder || undefined,
      defaultValue: newOptionDefaultValue || undefined,
      columnValues: Object.keys(newOptionColumnValues).length > 0 ? { ...newOptionColumnValues } : undefined
    };

    if (editingOptionType === 'unit') {
      setUnitOptions(prev => [...prev, newOption]);
    } else if (editingOptionType === 'material') {
      setMaterialOptions(prev => [...prev, newOption]);
    } else if (editingOptionType === 'surface') {
      setSurfaceTreatmentOptions(prev => [...prev, newOption]);
    } else {
      setCustomAttributeOptions(prev => ({
        ...prev,
        [editingOptionType]: [...(prev[editingOptionType] || []), newOption]
      }));
    }

    resetOptionForm();
    toast.success('속성이 추가되었습니다 (저장 필요)');
  };

  // 옵션 삭제
  const handleDeleteOption = (type: string, id: string) => {
    if (type === 'unit') {
      setUnitOptions(prev => prev.filter(o => o.id !== id));
    } else if (type === 'material') {
      setMaterialOptions(prev => prev.filter(o => o.id !== id));
    } else if (type === 'surface') {
      setSurfaceTreatmentOptions(prev => prev.filter(o => o.id !== id));
    } else {
      setCustomAttributeOptions(prev => ({
        ...prev,
        [type]: (prev[type] || []).filter(o => o.id !== id)
      }));
    }
    toast.success('삭제되었습니다');
  };

  // 칼럼 추가
  const handleAddColumn = () => {
    if (!managingColumnType || !newColumnName.trim() || !newColumnKey.trim()) {
      toast.error('칼럼명과 키를 입력해주세요');
      return;
    }

    const newColumn: OptionColumn = {
      id: `col-${Date.now()}`,
      key: newColumnKey,
      name: newColumnName,
      type: newColumnType,
      required: newColumnRequired
    };

    setAttributeColumns(prev => ({
      ...prev,
      [managingColumnType]: [...(prev[managingColumnType] || []), newColumn]
    }));

    resetColumnForm();
    toast.success('칼럼이 추가되었습니다');
  };

  // 칼럼 삭제
  const handleDeleteColumn = (columnKey: string) => {
    if (!managingColumnType) return;

    setAttributeColumns(prev => ({
      ...prev,
      [managingColumnType]: (prev[managingColumnType] || []).filter(c => c.key !== columnKey)
    }));
    toast.success('칼럼이 삭제되었습니다');
  };

  // 옵션 폼 초기화
  const resetOptionForm = () => {
    setNewOptionValue('');
    setNewOptionLabel('');
    setNewOptionColumnValues({});
    setNewOptionInputType('textbox');
    setNewOptionRequired(false);
    setNewOptionOptions('');
    setNewOptionPlaceholder('');
    setNewOptionDefaultValue('');
    setIsOptionDialogOpen(false);
  };

  // 칼럼 폼 초기화
  const resetColumnForm = () => {
    setNewColumnName('');
    setNewColumnKey('');
    setNewColumnType('text');
    setNewColumnRequired(false);
  };

  return {
    // 속성 옵션 상태
    unitOptions,
    setUnitOptions,
    materialOptions,
    setMaterialOptions,
    surfaceTreatmentOptions,
    setSurfaceTreatmentOptions,
    customAttributeOptions,
    setCustomAttributeOptions,

    // 옵션 다이얼로그 상태
    isOptionDialogOpen,
    setIsOptionDialogOpen,
    editingOptionType,
    setEditingOptionType,

    // 옵션 폼 상태
    newOptionValue,
    setNewOptionValue,
    newOptionLabel,
    setNewOptionLabel,
    newOptionColumnValues,
    setNewOptionColumnValues,
    newOptionInputType,
    setNewOptionInputType,
    newOptionRequired,
    setNewOptionRequired,
    newOptionOptions,
    setNewOptionOptions,
    newOptionPlaceholder,
    setNewOptionPlaceholder,
    newOptionDefaultValue,
    setNewOptionDefaultValue,

    // 칼럼 관리 상태
    isColumnManageDialogOpen,
    setIsColumnManageDialogOpen,
    managingColumnType,
    setManagingColumnType,
    attributeColumns,
    setAttributeColumns,

    // 칼럼 폼 상태
    newColumnName,
    setNewColumnName,
    newColumnKey,
    setNewColumnKey,
    newColumnType,
    setNewColumnType,
    newColumnRequired,
    setNewColumnRequired,

    // 핸들러
    handleAddOption,
    handleDeleteOption,
    handleAddColumn,
    handleDeleteColumn,
    resetOptionForm,
    resetColumnForm,
  };
}