Attributtes in product list Prestashop 1.7

We have a job to do: We have two Prestashop projects, one is a multistore with two shops and the other is a single shop. We use a plugin that shows each color combinations as a sepparate products in our store ([login to view URL]). - For each product showed we want to add the different colours and size variations of the product. - In each product of the list the colour variation that match with the product showed will be selected by default (for example for a black dress, the black colour will be selected by default). - The cart button will be available only when the user has selected a valid colour and size (give a class to insert css style like colour and won’t be available to select). - We want to add this functionality in category page, search page and selected filters and pages of the category (if it have). - When the user selects a color variation the image displayed in product will change if the variation has main image set in product configuration (for example if the user select White variation in a dress the product image will change to the White dress image). The theme used in all stores is the same, and the Prestashop version is 1.7