How to build query form to request AWS CloudSearch?

I have a SearchDomain on AWS CloudSearch. I know all the defined facets names.

I would like to build a web query form to use it, but I want to add my categories values (facets) on the side, like it is done on Amazon webstore

The only way I have to get facets values is to make a query (params query) and in the answer will contain facets linked to my query results.

Is there a way to fetch all the facet.FIELD possible values to build the query form ?

If not (as read here), how to design a form using facets ?