import { Injectable } from '@angular/core';
import { BehaviorSubject, Observable } from 'rxjs';

export interface User {
  id: string;
  name: string;
  department: string;
  medical_allowance: number;
}

@Injectable({
  providedIn: 'root'
})
export class SessionService {
  private currentUserSubject = new BehaviorSubject<User | null>(null);
  currentUser$: Observable<User | null> = this.currentUserSubject.asObservable();

  constructor() {
    const savedUser = localStorage.getItem('currentUser');
    if (savedUser) {
      this.currentUserSubject.next(JSON.parse(savedUser));
    }
  }

  setCurrentUser(user: User): void {
    localStorage.setItem('currentUser', JSON.stringify(user));
    this.currentUserSubject.next(user);
  }

  getCurrentUser(): User | null {
    return this.currentUserSubject.value;
  }

  logout(): void {
    localStorage.removeItem('currentUser');
    this.currentUserSubject.next(null);
  }
}