ERP-node/frontend/contexts/ScreenContext.tsx

/**
 * 화면 컨텍스트
 * 같은 화면 내의 컴포넌트들이 서로 통신할 수 있도록 합니다.
 */

"use client";

import React, { createContext, useContext, useCallback, useRef, useState } from "react";
import type { DataProvidable, DataReceivable } from "@/types/data-transfer";
import { logger } from "@/lib/utils/logger";
import type { SplitPanelPosition } from "@/contexts/SplitPanelContext";

interface ScreenContextValue {
  screenId?: number;
  tableName?: string;
  menuObjid?: number; // 메뉴 OBJID (카테고리 값 조회 시 필요)
  splitPanelPosition?: SplitPanelPosition; // 🆕 분할 패널 위치 (left/right)

  // 🆕 폼 데이터 (RepeaterFieldGroup 등 컴포넌트 데이터 저장)
  formData: Record<string, any>;
  updateFormData: (fieldName: string, value: any) => void;

  // 컴포넌트 등록
  registerDataProvider: (componentId: string, provider: DataProvidable) => void;
  unregisterDataProvider: (componentId: string) => void;
  registerDataReceiver: (componentId: string, receiver: DataReceivable) => void;
  unregisterDataReceiver: (componentId: string) => void;

  // 컴포넌트 조회
  getDataProvider: (componentId: string) => DataProvidable | undefined;
  getDataReceiver: (componentId: string) => DataReceivable | undefined;

  // 모든 컴포넌트 조회
  getAllDataProviders: () => Map<string, DataProvidable>;
  getAllDataReceivers: () => Map<string, DataReceivable>;
}

const ScreenContext = createContext<ScreenContextValue | null>(null);

interface ScreenContextProviderProps {
  screenId?: number;
  tableName?: string;
  menuObjid?: number; // 메뉴 OBJID
  splitPanelPosition?: SplitPanelPosition; // 🆕 분할 패널 위치
  children: React.ReactNode;
}

/**
 * 화면 컨텍스트 프로바이더
 */
export function ScreenContextProvider({
  screenId,
  tableName,
  menuObjid,
  splitPanelPosition,
  children,
}: ScreenContextProviderProps) {
  const dataProvidersRef = useRef<Map<string, DataProvidable>>(new Map());
  const dataReceiversRef = useRef<Map<string, DataReceivable>>(new Map());

  // 🆕 폼 데이터 상태 (RepeaterFieldGroup 등 컴포넌트 데이터 저장)
  const [formData, setFormData] = useState<Record<string, any>>({});

  // 🆕 폼 데이터 업데이트 함수
  const updateFormData = useCallback((fieldName: string, value: any) => {
    setFormData((prev) => {
      const updated = { ...prev, [fieldName]: value };
      logger.debug("ScreenContext formData 업데이트", {
        fieldName,
        valueType: typeof value,
        isArray: Array.isArray(value),
      });
      return updated;
    });
  }, []);

  const registerDataProvider = useCallback((componentId: string, provider: DataProvidable) => {
    dataProvidersRef.current.set(componentId, provider);
    logger.debug("데이터 제공자 등록", { componentId, componentType: provider.componentType });
  }, []);

  const unregisterDataProvider = useCallback((componentId: string) => {
    dataProvidersRef.current.delete(componentId);
    logger.debug("데이터 제공자 해제", { componentId });
  }, []);

  const registerDataReceiver = useCallback((componentId: string, receiver: DataReceivable) => {
    dataReceiversRef.current.set(componentId, receiver);
    logger.debug("데이터 수신자 등록", { componentId, componentType: receiver.componentType });
  }, []);

  const unregisterDataReceiver = useCallback((componentId: string) => {
    dataReceiversRef.current.delete(componentId);
    logger.debug("데이터 수신자 해제", { componentId });
  }, []);

  const getDataProvider = useCallback((componentId: string) => {
    return dataProvidersRef.current.get(componentId);
  }, []);

  const getDataReceiver = useCallback((componentId: string) => {
    return dataReceiversRef.current.get(componentId);
  }, []);

  const getAllDataProviders = useCallback(() => {
    return new Map(dataProvidersRef.current);
  }, []);

  const getAllDataReceivers = useCallback(() => {
    return new Map(dataReceiversRef.current);
  }, []);

  // 🆕 useMemo로 value 객체 메모이제이션 (무한 루프 방지)
  const value = React.useMemo<ScreenContextValue>(
    () => ({
      screenId,
      tableName,
      menuObjid,
      splitPanelPosition,
      formData,
      updateFormData,
      registerDataProvider,
      unregisterDataProvider,
      registerDataReceiver,
      unregisterDataReceiver,
      getDataProvider,
      getDataReceiver,
      getAllDataProviders,
      getAllDataReceivers,
    }),
    [
      screenId,
      tableName,
      menuObjid,
      splitPanelPosition,
      formData,
      updateFormData,
      registerDataProvider,
      unregisterDataProvider,
      registerDataReceiver,
      unregisterDataReceiver,
      getDataProvider,
      getDataReceiver,
      getAllDataProviders,
      getAllDataReceivers,
    ],
  );

  return <ScreenContext.Provider value={value}>{children}</ScreenContext.Provider>;
}

/**
 * 화면 컨텍스트 훅
 */
export function useScreenContext() {
  const context = useContext(ScreenContext);
  if (!context) {
    throw new Error("useScreenContext는 ScreenContextProvider 내부에서만 사용할 수 있습니다.");
  }
  return context;
}

/**
 * 화면 컨텍스트 훅 (선택적)
 * 컨텍스트가 없어도 에러를 발생시키지 않습니다.
 */
export function useScreenContextOptional() {
  return useContext(ScreenContext);
}