import { Activity, BarChart3, BookOpen, Car, ClipboardList, GitPullRequest, Settings, Users, type LucideIcon } from 'lucide-react';

export type AppRoute = 'dashboard' | 'curriculum' | 'groups' | 'platforms' | 'students' | 'submissions' | 'analytics' | 'settings' | 'profile';

export type NavItem = {
  id: AppRoute;
  label: string;
  icon: LucideIcon;
  // children?: string[];
};

export const defaultRoute: AppRoute = 'dashboard';

export const routePaths: Record<AppRoute, string> = {
  dashboard: '/dashboard',
  curriculum: '/curriculum',
  groups: '/groups',
  platforms: '/platforms',
  students: '/students',
  submissions: '/submissions',
  analytics: '/analytics',
  settings: '/settings',
  profile: '/profile'
};

export const navItems: NavItem[] = [
  { id: 'dashboard', label: '대시보드', icon: Activity },
  { id: 'curriculum', label: '커리큘럼 관리', icon: ClipboardList },
  { id: 'groups', label: '그룹 관리', icon: Users },
  { id: 'platforms', label: '플랫폼 관리', icon: Car },
  { id: 'students', label: '수강생 현황', icon: BookOpen },
  { id: 'submissions', label: '제출 현황', icon: GitPullRequest },
  { id: 'analytics', label: '통계 분석', icon: BarChart3 },
  { id: 'settings', label: '설정', icon: Settings }
];

// 2depth menu candidates. Keep this until the left menu structure is finalized.
// export const navItemChildren: Record<Exclude<AppRoute, 'profile'>, string[]> = {
//   dashboard: ['운영 요약', '오늘 할 일', '빠른 설정'],
//   groups: ['그룹 목록', '플랫폼 배정', '실습 주차'],
//   platforms: ['실시간 상태', '긴급 정지 로그', '장비 설정'],
//   students: ['수강생 목록', '접속 현황', '과제 제출'],
//   analytics: ['진도 분석', '플랫폼 사용률', '질문 추이'],
//   settings: ['권한 정책', '알림 설정', '서비스 연결']
// };

const appRoutes: AppRoute[] = [...navItems.map((item) => item.id), 'profile'];
const publicBasePath = import.meta.env.BASE_URL.replace(/\/+$/, '');

const stripPublicBasePath = (pathname: string): string => {
  if (!publicBasePath || publicBasePath === '/') return pathname;
  if (pathname === publicBasePath) return '/';
  if (pathname.startsWith(`${publicBasePath}/`)) return pathname.slice(publicBasePath.length) || '/';
  return pathname;
};

export const isAppRoute = (value: string): value is AppRoute => appRoutes.includes(value as AppRoute);

export const getRoutePath = (route: AppRoute) => routePaths[route];

export const getRouteFromPathname = (pathname: string): AppRoute | null => {
  const routePathname = stripPublicBasePath(pathname);
  const normalizedPath = routePathname === '/' ? routePaths[defaultRoute] : routePathname.replace(/\/+$/, '');
  const entry = Object.entries(routePaths).find(([, path]) => path === normalizedPath);
  return entry ? (entry[0] as AppRoute) : null;
};