import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { currentRole, ROLES } from './role';

const setUrl = (search: string) => history.pushState({}, '', search || '/');

// isDevMode() reads the `ngDevMode` global the Angular CLI defines away in a
// production build. There is no ambient type for it in app code, so this is
// accessed through an untyped bag rather than a `declare const`.
const globals = globalThis as Record<string, unknown>;
const originalNgDevMode = globals['ngDevMode'];
const setDevMode = (on: boolean) => {
  globals['ngDevMode'] = on;
};

describe('currentRole (dev mechanism)', () => {
  beforeEach(() => {
    sessionStorage.clear();
    setUrl('/');
    setDevMode(true);
  });
  afterEach(() => {
    globals['ngDevMode'] = originalNgDevMode;
  });

  it('lists the three roles', () => {
    expect(ROLES).toEqual(['drafter', 'approver', 'admin']);
  });

  it('reads a valid ?role= from the URL and persists it for the tab', () => {
    setUrl('?role=admin');
    expect(currentRole()).toBe('admin');
    setUrl('/'); // navigation drops the query param — value stays sticky
    expect(currentRole()).toBe('admin');
  });

  it('falls back to drafter when nothing is set or the value is invalid', () => {
    expect(currentRole()).toBe('drafter');
    setUrl('?role=nonsense');
    expect(currentRole()).toBe('drafter');
  });

  // BIO-012: the three hand-written `fetch` adapters call this function directly,
  // bypassing `roleInterceptor`'s own isDevMode()-gated registration — so the gate
  // has to hold here, not just at the interceptor, or `?role=` keeps working in a
  // production build through that side door.
  describe('outside isDevMode() (production build)', () => {
    beforeEach(() => setDevMode(false));

    it('ignores a ?role= in the URL and returns the default', () => {
      setUrl('?role=admin');
      expect(currentRole()).toBe('drafter');
    });

    it('never touches sessionStorage', () => {
      setUrl('?role=admin');
      currentRole();
      expect(sessionStorage.getItem('dev-role')).toBeNull();
    });

    it('ignores a role already sitting in sessionStorage from a prior dev session', () => {
      sessionStorage.setItem('dev-role', 'admin');
      expect(currentRole()).toBe('drafter');
    });
  });
});