SharePoint 2013 OnPremise (Powershell Script Document uploader)

Powershell Script to take values of metadata from a csv and add to a pdf file and upload to a document library. The document should also be checked in It should be flexible enough such that I can add or remove columns in the csv files if required. The script will define variables such as filename, file location, site location etc The script would pick each file from the location and find the file in the csv file and then pick all associated metadata and then upload and assign metadata Some of the columns are from Term Store. Some are also multi choice and some are from choices(dropdown)