import { RoleSyncService } from '../src/modules/auth/role-sync.service';

describe('RoleSyncService', () => {
  const mockPrisma: any = {};
  const mockPermissionCache: any = { invalidate: jest.fn() };
  const mockEvents: any = { publish: jest.fn() };
  const mockGroupHash: any = { compute: (g: any) => require('crypto').createHash('sha256').update((g||[]).slice().sort().join(','), 'utf8').digest('hex') };
  let service: RoleSyncService;

  beforeEach(() => {
    mockPrisma.user = { findUnique: jest.fn() };
    mockPrisma.authGroupRoleMapping = { findMany: jest.fn() };
    mockPrisma.userRole = { findMany: jest.fn() };
    mockPrisma.auditLog = { create: jest.fn() };
    mockPrisma.user = mockPrisma.user;
    mockPrisma.$transaction = jest.fn(async (cb: any) => {
      // simulate transaction by calling provided callback with tx = mockPrisma
      await cb(mockPrisma);
    });

    service = new RoleSyncService(mockPrisma as any, mockGroupHash as any, mockPermissionCache as any, mockEvents as any);
  });

  test('computeGroupHash consistent and order independent', () => {
    const a = ['b', 'a', 'c'];
    const h1 = service.computeGroupHash(a);
    const h2 = service.computeGroupHash(['a', 'b', 'c']);
    expect(h1).toBe(h2);
  });

  test('skips sync when group hash unchanged', async () => {
    const groups = ['RL-Owner'];
    const hash = service.computeGroupHash(groups);
    mockPrisma.user.findUnique.mockResolvedValue({ id: 'uid', lastGroupHash: hash });

    const res = await service.syncUserRolesFromAuthentik('uid', groups);
    expect(res.skipped).toBe(true);
    expect(mockPrisma.$transaction).not.toHaveBeenCalled();
  });

  test('performs transaction and writes audit when changed', async () => {
    const groups = ['RL-Owner'];
    mockPrisma.user.findUnique.mockResolvedValue({ id: 'uid', lastGroupHash: 'old' });
    mockPrisma.authGroupRoleMapping.findMany.mockResolvedValue([{ roleId: 'r1' }]);
    mockPrisma.userRole.findMany.mockResolvedValue([{ roleId: 'r_old' }]);

    // spy on tx ops
    mockPrisma.userRole.deleteMany = jest.fn();
    mockPrisma.userRole.createMany = jest.fn();
    mockPrisma.user.update = jest.fn();

    mockPrisma.auditLog.create = jest.fn();

    const res = await service.syncUserRolesFromAuthentik('uid', groups);

    expect(mockPrisma.$transaction).toHaveBeenCalled();
    expect(mockPrisma.userRole.deleteMany).toHaveBeenCalledWith({ where: { userId: 'uid', source: 'AUTHENTIK' } });
    expect(mockPrisma.userRole.createMany).toHaveBeenCalled();
    expect(mockPrisma.user.update).toHaveBeenCalled();
    expect(mockPermissionCache.invalidate).toHaveBeenCalledWith('uid');
    expect(mockEvents.publish).toHaveBeenCalledWith(expect.objectContaining({ type: 'RolesSynchronized' }));
    expect(res.skipped).toBe(false);
    expect(res.assignedRoleIds).toEqual(['r1']);
  });
});