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path: root/components/layout/MobileMenuV2.tsx
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"use client";

import * as React from "react";
import Link from "next/link";
import { cn } from "@/lib/utils";
import { Button } from "@/components/ui/button";
import { ScrollArea } from "@/components/ui/scroll-area";
import { X, ChevronDown, ChevronRight } from "lucide-react";
import type { MenuTreeNode } from "@/lib/menu-v2/types";

interface MobileMenuV2Props {
  lng: string;
  onClose: () => void;
  tree: MenuTreeNode[];
  getTitle: (node: MenuTreeNode) => string;
  getDescription: (node: MenuTreeNode) => string | null;
}

export function MobileMenuV2({
  lng,
  onClose,
  tree,
  getTitle,
  getDescription,
}: MobileMenuV2Props) {
  const [expandedGroups, setExpandedGroups] = React.useState<Set<number>>(
    new Set()
  );

  const toggleGroup = (groupId: number) => {
    setExpandedGroups((prev) => {
      const next = new Set(prev);
      if (next.has(groupId)) {
        next.delete(groupId);
      } else {
        next.add(groupId);
      }
      return next;
    });
  };

  // 드롭다운 메뉴인지 판단
  const isDropdownMenu = (node: MenuTreeNode) => 
    node.nodeType === 'menu_group' && node.children && node.children.length > 0;

  return (
    <div className="fixed inset-0 z-50 bg-background md:hidden">
      {/* 헤더 */}
      <div className="flex items-center justify-between px-4 h-14 border-b">
        <span className="font-semibold">메뉴</span>
        <Button variant="ghost" size="icon" onClick={onClose}>
          <X className="h-5 w-5" />
          <span className="sr-only">닫기</span>
        </Button>
      </div>

      {/* 스크롤 영역 */}
      <ScrollArea className="h-[calc(100vh-56px)]">
        <div className="px-4 py-4 space-y-2">
          {tree.map((node) => {
            // 드롭다운 메뉴 (menu_group with children)
            if (isDropdownMenu(node)) {
              return (
                <div key={node.id} className="space-y-2">
                  {/* 메뉴그룹 헤더 */}
                  <button
                    onClick={() => toggleGroup(node.id)}
                    className="flex items-center justify-between w-full py-2 text-left font-semibold"
                  >
                    <span>{getTitle(node)}</span>
                    {expandedGroups.has(node.id) ? (
                      <ChevronDown className="h-4 w-4" />
                    ) : (
                      <ChevronRight className="h-4 w-4" />
                    )}
                  </button>

                  {/* 하위 메뉴 */}
                  {expandedGroups.has(node.id) && (
                    <div className="pl-4 space-y-1">
                      {node.children?.map((item) => {
                        if (item.nodeType === "group") {
                          // 그룹인 경우
                          return (
                            <div key={item.id} className="space-y-1">
                              <div className="text-xs text-muted-foreground font-medium py-1">
                                {getTitle(item)}
                              </div>
                              <div className="pl-2 space-y-1">
                                {item.children?.map((menu) => (
                                  <MobileMenuLink
                                    key={menu.id}
                                    href={`/${lng}${menu.menuPath}`}
                                    title={getTitle(menu)}
                                    onClick={onClose}
                                  />
                                ))}
                              </div>
                            </div>
                          );
                        } else if (item.nodeType === "menu") {
                          // 직접 메뉴인 경우
                          return (
                            <MobileMenuLink
                              key={item.id}
                              href={`/${lng}${item.menuPath}`}
                              title={getTitle(item)}
                              onClick={onClose}
                            />
                          );
                        }
                        return null;
                      })}
                    </div>
                  )}
                </div>
              );
            }

            // 단일 링크 메뉴 (최상위 menu)
            if (node.nodeType === 'menu' && node.menuPath) {
              return (
                <MobileMenuLink
                  key={node.id}
                  href={`/${lng}${node.menuPath}`}
                  title={getTitle(node)}
                  onClick={onClose}
                />
              );
            }

            return null;
          })}
        </div>
      </ScrollArea>
    </div>
  );
}

interface MobileMenuLinkProps {
  href: string;
  title: string;
  onClick: () => void;
}

function MobileMenuLink({ href, title, onClick }: MobileMenuLinkProps) {
  return (
    <Link
      href={href}
      onClick={onClick}
      className={cn(
        "block py-2 px-2 rounded-md text-sm",
        "hover:bg-accent hover:text-accent-foreground",
        "transition-colors"
      )}
    >
      {title}
    </Link>
  );
}