import { vi } from 'vitest';
import { TestBed } from '@angular/core/testing';
import { ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { authGuard } from './auth.guard';
import { KeycloakService } from './keycloak.service';

describe('authGuard', () => {
  let mockKeycloak: { isLoggedIn: ReturnType<typeof vi.fn>; login: ReturnType<typeof vi.fn> };

  beforeEach(() => {
    mockKeycloak = {
      isLoggedIn: vi.fn().mockReturnValue(true),
      login: vi.fn().mockResolvedValue(undefined),
    };

    TestBed.configureTestingModule({
      providers: [{ provide: KeycloakService, useValue: mockKeycloak }],
    });
  });

  const runGuard = () =>
    TestBed.runInInjectionContext(() =>
      authGuard({} as ActivatedRouteSnapshot, {} as RouterStateSnapshot),
    );

  it('returns true when the user is logged in', () => {
    mockKeycloak.isLoggedIn.mockReturnValue(true);
    expect(runGuard()).toBe(true);
  });

  it('returns false when the user is not logged in', () => {
    mockKeycloak.isLoggedIn.mockReturnValue(false);
    expect(runGuard()).toBe(false);
  });

  it('calls login() when the user is not logged in', () => {
    mockKeycloak.isLoggedIn.mockReturnValue(false);
    runGuard();
    expect(mockKeycloak.login).toHaveBeenCalled();
  });

  it('does not call login() when the user is already logged in', () => {
    mockKeycloak.isLoggedIn.mockReturnValue(true);
    runGuard();
    expect(mockKeycloak.login).not.toHaveBeenCalled();
  });
});