storybook/docs/snippets/react/component-story-custom-args-complex.ts.mdx

```ts
// YourComponent.stories.js

import React from 'react';
import { Story, Meta } from '@storybook/react';

import { YourComponent, YourComponentProps } from './your-component'

// a function to apply some computation
const someFunction = (valuePropertyA, valuePropertyB) => {
  // makes some computations and returns something
};

export default {
  component: YourComponent,
  title: 'A complex case with a function',
  // creates specific argTypes with options
  argTypes: {
    propertyA: {
      control: {
        type: 'select',
        options: [
          'Item One', 
          'Item Two',
          'Item Three'
        ],
      },
    },
    propertyB: {
      control: {
        type: 'select',
        options: [
          'Another Item One',
          'Another Item Two',
          'Another Item Three'
        ],
      },
    },
  },
} as Meta;

const Template: Story<YourComponentProps> = ({propertyA, propertyB, ...rest}) => {
  const someFunctionResult = someFunction(propertyA, propertyB);
  return <YourComponent somePoperty={someFunctionResult} {...rest} />;
};
```