import { SetMetadata } from '@nestjs/common';
import { RequireSystemAdmin, REQUIRE_SYSTEM_ADMIN_METADATA_KEY } from './RequireSystemAdmin';

// Mock SetMetadata
vi.mock('@nestjs/common', () => ({
  SetMetadata: vi.fn(() => () => {}),
}));

describe('RequireSystemAdmin', () => {
  it('should return a method decorator', () => {
    const decorator = RequireSystemAdmin();
    expect(typeof decorator).toBe('function');
  });

  it('should call SetMetadata with correct key and value', () => {
    RequireSystemAdmin();
    
    expect(SetMetadata).toHaveBeenCalledWith(REQUIRE_SYSTEM_ADMIN_METADATA_KEY, {
      required: true,
    });
  });

  it('should return a decorator that can be used as both method and class decorator', () => {
    const decorator = RequireSystemAdmin();
    
    // Test as method decorator
    const mockTarget = {};
    const mockPropertyKey = 'testMethod';
    const mockDescriptor = { value: () => {} };
    
    const result = decorator(mockTarget, mockPropertyKey, mockDescriptor);
    
    // The decorator should return the descriptor
    expect(result).toBe(mockDescriptor);
  });

  it('should have correct metadata key', () => {
    expect(REQUIRE_SYSTEM_ADMIN_METADATA_KEY).toBe('gridpilot:requireSystemAdmin');
  });
});
