import React, { useState, useEffect, useRef, useMemo } from "react";
import { filterDOMProps } from "@/lib/utils/domPropsFilter";
import { useCodeOptions, useTableCodeCategory } from "@/hooks/queries/useCodes";
import { cn } from "@/lib/registry/components/common/inputStyles";

interface Option {
  value: string;
  label: string;
}

export interface SelectBasicComponentProps {
  component: any;
  componentConfig: any;
  screenId?: number;
  onUpdate?: (field: string, value: any) => void;
  isSelected?: boolean;
  isDesignMode?: boolean;
  isInteractive?: boolean;
  onFormDataChange?: (fieldName: string, value: any) => void;
  className?: string;
  style?: React.CSSProperties;
  onClick?: () => void;
  onDragStart?: () => void;
  onDragEnd?: () => void;
  value?: any; // 외부에서 전달받는 값
  menuObjid?: number; // 🆕 메뉴 OBJID (코드 스코프용)
  [key: string]: any;
}

// ✅ React Query를 사용하여 중복 요청 방지 및 자동 캐싱 처리
// - 동일한 queryKey에 대해서는 자동으로 중복 요청 제거
// - 10분 staleTime으로 적절한 캐시 관리
// - 30분 gcTime으로 메모리 효율성 확보

const SelectBasicComponent: React.FC<SelectBasicComponentProps> = ({
  component,
  componentConfig,
  screenId,
  onUpdate,
  isSelected = false,
  isDesignMode = false,
  isInteractive = false,
  onFormDataChange,
  className,
  style,
  onClick,
  onDragStart,
  onDragEnd,
  value: externalValue, // 명시적으로 value prop 받기
  menuObjid, // 🆕 메뉴 OBJID
  ...props
}) => {
  const [isOpen, setIsOpen] = useState(false);

  // webTypeConfig 또는 componentConfig 사용 (DynamicWebTypeRenderer 호환성)
  const config = (props as any).webTypeConfig || componentConfig || {};

  // webType에 따른 세부 타입 결정 (TextInputComponent와 동일한 방식)
  const webType = component.componentConfig?.webType || "select";

  // 외부에서 전달받은 value가 있으면 우선 사용, 없으면 config.value 사용
  const [selectedValue, setSelectedValue] = useState(externalValue || config?.value || "");
  const [selectedLabel, setSelectedLabel] = useState("");

  // multiselect의 경우 배열로 관리 (콤마 구분자로 파싱)
  const [selectedValues, setSelectedValues] = useState<string[]>(() => {
    const initialValue = externalValue || config?.value || "";
    if (config?.multiple && typeof initialValue === "string" && initialValue) {
      return initialValue.split(",").map(v => v.trim()).filter(v => v);
    }
    return [];
  });

  // autocomplete의 경우 검색어 관리
  const [searchQuery, setSearchQuery] = useState("");


  const selectRef = useRef<HTMLDivElement>(null);

  // 안정적인 쿼리 키를 위한 메모이제이션
  const stableTableName = useMemo(() => component.tableName, [component.tableName]);
  const stableColumnName = useMemo(() => component.columnName, [component.columnName]);
  const staticCodeCategory = useMemo(() => config?.codeCategory, [config?.codeCategory]);

  // 🚀 React Query: 테이블 코드 카테고리 조회
  const { data: dynamicCodeCategory } = useTableCodeCategory(stableTableName, stableColumnName);

  // 코드 카테고리 결정: 동적 카테고리 > 설정 카테고리 (메모이제이션)
  const codeCategory = useMemo(() => {
    const category = dynamicCodeCategory || staticCodeCategory;
    return category;
  }, [dynamicCodeCategory, staticCodeCategory, component.id]);

  // 🚀 React Query: 코드 옵션 조회 (안정적인 enabled 조건)
  const isCodeCategoryValid = useMemo(() => {
    return !!codeCategory && codeCategory !== "none";
  }, [codeCategory]);

  const {
    options: codeOptions,
    isLoading: isLoadingCodes,
    isFetching,
  } = useCodeOptions(codeCategory, isCodeCategoryValid, menuObjid);

  // 디버깅: menuObjid가 제대로 전달되는지 확인
  useEffect(() => {
    if (codeCategory && codeCategory !== "none") {
      console.log(`🎯 [SelectBasicComponent ${component.id}] 코드 옵션 로드:`, {
        codeCategory,
        menuObjid,
        hasMenuObjid: !!menuObjid,
        isCodeCategoryValid,
        codeOptionsCount: codeOptions.length,
        isLoading: isLoadingCodes,
      });
    }
  }, [component.id, codeCategory, menuObjid, codeOptions.length, isLoadingCodes, isCodeCategoryValid]);

  // 외부 value prop 변경 시 selectedValue 업데이트
  useEffect(() => {
    const newValue = externalValue || config?.value || "";
    // 값이 실제로 다른 경우에만 업데이트 (빈 문자열도 유효한 값으로 처리)
    if (newValue !== selectedValue) {
      setSelectedValue(newValue);
      
      // 다중선택 모드인 경우 selectedValues도 업데이트
      if (config?.multiple && typeof newValue === "string" && newValue) {
        const values = newValue.split(",").map(v => v.trim()).filter(v => v);
        setSelectedValues(values);
      }
    }
  }, [externalValue, config?.value, config?.multiple]);

  // ✅ React Query가 자동으로 처리하므로 복잡한 전역 상태 관리 제거
  // - 캐싱: React Query가 자동 관리 (10분 staleTime, 30분 gcTime)
  // - 중복 요청 방지: 동일한 queryKey에 대해 자동 중복 제거
  // - 상태 동기화: 모든 컴포넌트가 같은 캐시 공유

  // 선택된 값에 따른 라벨 업데이트
  useEffect(() => {
    const getAllOptions = () => {
      const configOptions = config.options || [];
      return [...codeOptions, ...configOptions];
    };

    const options = getAllOptions();
    const selectedOption = options.find((option) => option.value === selectedValue);

    // 🎯 코드 타입의 경우 코드값과 코드명을 모두 고려하여 라벨 찾기
    let newLabel = selectedOption?.label || "";

    // selectedOption이 없고 selectedValue가 있다면, 코드명으로도 검색해보기
    if (!selectedOption && selectedValue && codeOptions.length > 0) {
      // 1) selectedValue가 코드명인 경우 (예: "국내")
      const labelMatch = options.find((option) => option.label === selectedValue);
      if (labelMatch) {
        newLabel = labelMatch.label;
      } else {
        // 2) selectedValue가 코드값인 경우라면 원래 로직대로 라벨을 찾되, 없으면 원값 표시
        newLabel = selectedValue; // 코드값 그대로 표시 (예: "555")
      }
    }

    if (newLabel !== selectedLabel) {
      setSelectedLabel(newLabel);
    }
  }, [selectedValue, codeOptions, config.options]);

  // 클릭 이벤트 핸들러 (React Query로 간소화)
  const handleToggle = () => {
    if (isDesignMode) return;

    // React Query가 자동으로 캐시 관리하므로 수동 새로고침 불필요
    setIsOpen(!isOpen);
  };

  // 옵션 선택 핸들러
  const handleOptionSelect = (value: string, label: string) => {
    setSelectedValue(value);
    setSelectedLabel(label);
    setIsOpen(false);

    // 디자인 모드에서의 컴포넌트 속성 업데이트
    if (onUpdate) {
      onUpdate("value", value);
    }

    // 인터랙티브 모드에서 폼 데이터 업데이트 (TextInputComponent와 동일한 로직)
    if (isInteractive && onFormDataChange && component.columnName) {
      onFormDataChange(component.columnName, value);
    }
  };

  // 외부 클릭 시 드롭다운 닫기
  useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (selectRef.current && !selectRef.current.contains(event.target as Node)) {
        setIsOpen(false);
      }
    };

    if (isOpen) {
      document.addEventListener("mousedown", handleClickOutside);
    }

    return () => {
      document.removeEventListener("mousedown", handleClickOutside);
    };
  }, [isOpen]);

  // ✅ React Query가 자동으로 처리하므로 수동 이벤트 리스너 불필요
  // - refetchOnWindowFocus: true (기본값)
  // - refetchOnReconnect: true (기본값)
  // - staleTime으로 적절한 캐시 관리

  // 모든 옵션 가져오기
  const getAllOptions = () => {
    const configOptions = config.options || [];
    return [...codeOptions, ...configOptions];
  };

  const allOptions = getAllOptions();
  const placeholder = componentConfig.placeholder || "선택하세요";

  // DOM props에서 React 전용 props 필터링
  const {
    component: _component,
    componentConfig: _componentConfig,
    screenId: _screenId,
    onUpdate: _onUpdate,
    isSelected: _isSelected,
    isDesignMode: _isDesignMode,
    className: _className,
    style: _style,
    onClick: _onClick,
    onDragStart: _onDragStart,
    onDragEnd: _onDragEnd,
    ...otherProps
  } = props;

  const safeDomProps = filterDOMProps(otherProps);

  // 세부 타입별 렌더링
  const renderSelectByWebType = () => {
    // code-radio: 라디오 버튼으로 코드 선택
    if (webType === "code-radio") {
      return (
        <div className="flex flex-col gap-2">
          {allOptions.map((option, index) => (
            <label key={index} className="flex cursor-pointer items-center gap-2">
              <input
                type="radio"
                name={component.id || "code-radio-group"}
                value={option.value}
                checked={selectedValue === option.value}
                onChange={() => handleOptionSelect(option.value, option.label)}
                disabled={isDesignMode}
                className="border-input text-primary focus:ring-ring h-4 w-4"
              />
              <span className="text-sm">{option.label}</span>
            </label>
          ))}
        </div>
      );
    }

    // code-autocomplete: 코드 자동완성
    if (webType === "code-autocomplete") {
      const filteredOptions = allOptions.filter(
        (opt) =>
          opt.label.toLowerCase().includes(searchQuery.toLowerCase()) ||
          opt.value.toLowerCase().includes(searchQuery.toLowerCase()),
      );

      return (
        <div className="w-full">
          <input
            type="text"
            value={searchQuery || selectedLabel}
            onChange={(e) => {
              setSearchQuery(e.target.value);
              setIsOpen(true);
            }}
            onFocus={() => setIsOpen(true)}
            placeholder="코드 또는 코드명 입력..."
            className={cn(
              "h-10 w-full rounded-lg border border-gray-300 bg-white px-3 py-2 transition-all outline-none",
              !isDesignMode && "hover:border-orange-400 focus:border-orange-500 focus:ring-2 focus:ring-orange-200",
              isSelected && "ring-2 ring-orange-500",
            )}
            readOnly={isDesignMode}
          />
          {isOpen && !isDesignMode && filteredOptions.length > 0 && (
            <div className="absolute z-[99999] mt-1 max-h-60 w-full overflow-auto rounded-md border border-gray-300 bg-white shadow-lg">
              {filteredOptions.map((option, index) => (
                <div
                  key={`${option.value}-${index}`}
                  className="cursor-pointer bg-white px-3 py-2 hover:bg-gray-100"
                  onClick={() => {
                    setSearchQuery("");
                    handleOptionSelect(option.value, option.label);
                  }}
                >
                  <div className="flex items-center justify-between">
                    <span className="text-sm font-medium text-gray-900">{option.label}</span>
                    <span className="text-xs text-gray-500">{option.value}</span>
                  </div>
                </div>
              ))}
            </div>
          )}
        </div>
      );
    }

    // code: 기본 코드 선택박스 (select와 동일)
    if (webType === "code") {
      return (
        <div className="w-full">
          <div
            className={cn(
              "flex h-10 w-full cursor-pointer items-center justify-between rounded-lg border border-gray-300 bg-white px-3 py-2",
              !isDesignMode && "hover:border-orange-400",
              isSelected && "ring-2 ring-orange-500",
              isOpen && "border-orange-500",
            )}
            onClick={handleToggle}
            style={{ pointerEvents: isDesignMode ? "none" : "auto" }}
          >
            <span className={selectedLabel ? "text-gray-900" : "text-gray-500"}>{selectedLabel || placeholder}</span>
            <svg
              className={`h-4 w-4 transition-transform ${isOpen ? "rotate-180" : ""}`}
              fill="none"
              stroke="currentColor"
              viewBox="0 0 24 24"
            >
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
            </svg>
          </div>
          {isOpen && !isDesignMode && (
            <div className="absolute z-[99999] mt-1 max-h-60 w-full overflow-auto rounded-md border border-gray-300 bg-white shadow-lg">
              {isLoadingCodes ? (
                <div className="bg-white px-3 py-2 text-gray-900">로딩 중...</div>
              ) : allOptions.length > 0 ? (
                allOptions.map((option, index) => (
                  <div
                    key={`${option.value}-${index}`}
                    className="cursor-pointer bg-white px-3 py-2 text-gray-900 hover:bg-gray-100"
                    onClick={() => handleOptionSelect(option.value, option.label)}
                  >
                    {option.label}
                  </div>
                ))
              ) : (
                <div className="bg-white px-3 py-2 text-gray-900">옵션이 없습니다</div>
              )}
            </div>
          )}
        </div>
      );
    }

    // multiselect: 여러 항목 선택 (태그 형식)
    if (webType === "multiselect") {
      return (
        <div className="w-full">
          <div
            className={cn(
              "box-border flex h-full w-full flex-wrap gap-2 rounded-lg border border-gray-300 bg-white px-3 py-2",
              !isDesignMode && "hover:border-orange-400",
              isSelected && "ring-2 ring-orange-500",
            )}
          >
            {selectedValues.map((val, idx) => {
              const opt = allOptions.find((o) => o.value === val);
              return (
                <span key={idx} className="flex items-center gap-1 rounded bg-blue-100 px-2 py-1 text-sm text-blue-800">
                  {opt?.label || val}
                  <button
                    type="button"
                    onClick={() => {
                      const newVals = selectedValues.filter((v) => v !== val);
                      setSelectedValues(newVals);
                      if (isInteractive && onFormDataChange && component.columnName) {
                        onFormDataChange(component.columnName, newVals.join(","));
                      }
                    }}
                    className="ml-1 text-blue-600 hover:text-blue-800"
                  >
                    ×
                  </button>
                </span>
              );
            })}
            <input
              type="text"
              placeholder={selectedValues.length > 0 ? "" : placeholder}
              className="min-w-[100px] flex-1 border-none bg-transparent outline-none"
              onClick={() => setIsOpen(true)}
              readOnly={isDesignMode}
            />
          </div>
        </div>
      );
    }

    // autocomplete: 검색 기능 포함
    if (webType === "autocomplete") {
      const filteredOptions = allOptions.filter(
        (opt) =>
          opt.label.toLowerCase().includes(searchQuery.toLowerCase()) ||
          opt.value.toLowerCase().includes(searchQuery.toLowerCase()),
      );

      return (
        <div className="w-full">
          <input
            type="text"
            value={searchQuery}
            onChange={(e) => {
              setSearchQuery(e.target.value);
              setIsOpen(true);
            }}
            onFocus={() => setIsOpen(true)}
            placeholder={placeholder}
            className={cn(
              "h-10 w-full rounded-lg border border-gray-300 bg-white px-3 py-2 transition-all outline-none",
              !isDesignMode && "hover:border-orange-400 focus:border-orange-500 focus:ring-2 focus:ring-orange-200",
              isSelected && "ring-2 ring-orange-500",
            )}
            readOnly={isDesignMode}
          />
          {isOpen && !isDesignMode && filteredOptions.length > 0 && (
            <div className="absolute z-[99999] mt-1 max-h-60 w-full overflow-auto rounded-md border border-gray-300 bg-white shadow-lg">
              {filteredOptions.map((option, index) => (
                <div
                  key={`${option.value}-${index}`}
                  className="cursor-pointer bg-white px-3 py-2 text-gray-900 hover:bg-gray-100"
                  onClick={() => {
                    setSearchQuery(option.label);
                    setSelectedValue(option.value);
                    setSelectedLabel(option.label);
                    setIsOpen(false);
                    if (isInteractive && onFormDataChange && component.columnName) {
                      onFormDataChange(component.columnName, option.value);
                    }
                  }}
                >
                  {option.label}
                </div>
              ))}
            </div>
          )}
        </div>
      );
    }

    // dropdown (검색 선택박스): 기본 select와 유사하지만 검색 가능
    if (webType === "dropdown") {
      return (
        <div className="w-full">
          <div
            className={cn(
              "flex h-10 w-full cursor-pointer items-center justify-between rounded-lg border border-gray-300 bg-white px-3 py-2",
              !isDesignMode && "hover:border-orange-400",
              isSelected && "ring-2 ring-orange-500",
              isOpen && "border-orange-500",
            )}
            onClick={handleToggle}
            style={{ pointerEvents: isDesignMode ? "none" : "auto" }}
          >
            <span className={selectedLabel ? "text-gray-900" : "text-gray-500"}>{selectedLabel || placeholder}</span>
            <svg
              className={`h-4 w-4 transition-transform ${isOpen ? "rotate-180" : ""}`}
              fill="none"
              stroke="currentColor"
              viewBox="0 0 24 24"
            >
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
            </svg>
          </div>
          {isOpen && !isDesignMode && (
            <div className="absolute z-[99999] mt-1 w-full rounded-md border border-gray-300 bg-white shadow-lg">
              <input
                type="text"
                value={searchQuery}
                onChange={(e) => setSearchQuery(e.target.value)}
                placeholder="검색..."
                className="w-full border-b border-gray-300 px-3 py-2 outline-none"
              />
              <div className="max-h-60 overflow-auto">
                {allOptions
                  .filter(
                    (opt) =>
                      opt.label.toLowerCase().includes(searchQuery.toLowerCase()) ||
                      opt.value.toLowerCase().includes(searchQuery.toLowerCase()),
                  )
                  .map((option, index) => (
                    <div
                      key={`${option.value}-${index}`}
                      className="cursor-pointer bg-white px-3 py-2 text-gray-900 hover:bg-gray-100"
                      onClick={() => handleOptionSelect(option.value, option.label)}
                    >
                      {option.label || option.value}
                    </div>
                  ))}
              </div>
            </div>
          )}
        </div>
      );
    }

    // select (기본 선택박스)
    // 다중선택 모드인 경우
    if (config?.multiple) {
      return (
        <div className="w-full">
          <div
            className={cn(
              "box-border flex h-full min-h-[40px] w-full flex-wrap gap-2 rounded-lg border border-gray-300 bg-white px-3 py-2",
              !isDesignMode && "hover:border-orange-400",
              isSelected && "ring-2 ring-orange-500",
            )}
            onClick={() => !isDesignMode && setIsOpen(true)}
            style={{ pointerEvents: isDesignMode ? "none" : "auto" }}
          >
            {selectedValues.map((val, idx) => {
              const opt = allOptions.find((o) => o.value === val);
              return (
                <span key={idx} className="flex items-center gap-1 rounded bg-blue-100 px-2 py-1 text-sm text-blue-800">
                  {opt?.label || val}
                  <button
                    type="button"
                    onClick={(e) => {
                      e.stopPropagation();
                      const newVals = selectedValues.filter((v) => v !== val);
                      setSelectedValues(newVals);
                      const newValue = newVals.join(",");
                      if (isInteractive && onFormDataChange && component.columnName) {
                        onFormDataChange(component.columnName, newValue);
                      }
                    }}
                    className="ml-1 text-blue-600 hover:text-blue-800"
                  >
                    ×
                  </button>
                </span>
              );
            })}
            {selectedValues.length === 0 && (
              <span className="text-gray-500">{placeholder}</span>
            )}
          </div>
          {isOpen && !isDesignMode && (
            <div className="absolute z-[99999] mt-1 max-h-60 w-full overflow-auto rounded-md border border-gray-300 bg-white shadow-lg">
              {isLoadingCodes ? (
                <div className="bg-white px-3 py-2 text-gray-900">로딩 중...</div>
              ) : allOptions.length > 0 ? (
                allOptions.map((option, index) => {
                  const isSelected = selectedValues.includes(option.value);
                  return (
                    <div
                      key={`${option.value}-${index}`}
                      className={cn(
                        "cursor-pointer px-3 py-2 text-gray-900 hover:bg-gray-100",
                        isSelected && "bg-blue-50 font-medium"
                      )}
                      onClick={() => {
                        const newVals = isSelected
                          ? selectedValues.filter((v) => v !== option.value)
                          : [...selectedValues, option.value];
                        setSelectedValues(newVals);
                        const newValue = newVals.join(",");
                        if (isInteractive && onFormDataChange && component.columnName) {
                          onFormDataChange(component.columnName, newValue);
                        }
                      }}
                    >
                      <div className="flex items-center gap-2">
                        <input
                          type="checkbox"
                          checked={isSelected}
                          onChange={() => {}}
                          className="h-4 w-4"
                        />
                        <span>{option.label || option.value}</span>
                      </div>
                    </div>
                  );
                })
              ) : (
                <div className="bg-white px-3 py-2 text-gray-900">옵션이 없습니다</div>
              )}
            </div>
          )}
        </div>
      );
    }
    
    // 단일선택 모드
    return (
      <div className="w-full">
        <div
          className={cn(
            "flex h-10 w-full cursor-pointer items-center justify-between rounded-lg border border-gray-300 bg-white px-3 py-2",
            !isDesignMode && "hover:border-orange-400",
            isSelected && "ring-2 ring-orange-500",
            isOpen && "border-orange-500",
          )}
          onClick={handleToggle}
          style={{ pointerEvents: isDesignMode ? "none" : "auto" }}
        >
          <span className={selectedLabel ? "text-gray-900" : "text-gray-500"}>{selectedLabel || placeholder}</span>
          <svg
            className={`h-4 w-4 transition-transform ${isOpen ? "rotate-180" : ""}`}
            fill="none"
            stroke="currentColor"
            viewBox="0 0 24 24"
          >
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
          </svg>
        </div>
        {isOpen && !isDesignMode && (
          <div className="absolute z-[99999] mt-1 max-h-60 w-full overflow-auto rounded-md border border-gray-300 bg-white shadow-lg">
            {isLoadingCodes ? (
              <div className="bg-white px-3 py-2 text-gray-900">로딩 중...</div>
            ) : allOptions.length > 0 ? (
              allOptions.map((option, index) => (
                <div
                  key={`${option.value}-${index}`}
                  className="cursor-pointer bg-white px-3 py-2 text-gray-900 hover:bg-gray-100"
                  onClick={() => handleOptionSelect(option.value, option.label)}
                >
                  {option.label || option.value}
                </div>
              ))
            ) : (
              <div className="bg-white px-3 py-2 text-gray-900">옵션이 없습니다</div>
            )}
          </div>
        )}
      </div>
    );
  };

  return (
    <div
      ref={selectRef}
      className={`relative w-full ${className || ""}`}
      style={style}
      onClick={onClick}
      onDragStart={onDragStart}
      onDragEnd={onDragEnd}
      {...safeDomProps}
    >
      {/* 라벨 렌더링 */}
      {component.label && (component.style?.labelDisplay ?? true) && (
        <label className="absolute -top-6 left-0 text-sm font-medium text-slate-600">
          {component.label}
          {component.required && <span className="text-red-500">*</span>}
        </label>
      )}

      {/* 세부 타입별 UI 렌더링 */}
      {renderSelectByWebType()}
    </div>
  );
};

// Wrapper 컴포넌트 (기존 호환성을 위해)
export const SelectBasicWrapper = SelectBasicComponent;

// 기본 export
export { SelectBasicComponent };
