class Waivers::CSVFileReader

def self.fetch_data(path)
  waiver_data_hash = {}
  CSV.foreach(path, headers: true) do |row|
    row_hash = row.to_hash
    @headers = row_hash.keys if @headers.empty?
    control_id = row_hash["control_id"]
    # delete keys and values not required in final hash
    row_hash.delete("control_id")
    row_hash.delete_if { |k, v| k.nil? || v.nil? }
    waiver_data_hash[control_id] = row_hash if control_id && !row_hash.blank?
  end
  waiver_data_hash
rescue CSV::MalformedCSVError => e
  raise "Error reading InSpec waivers in CSV: #{e}"
end

def self.headers
  @headers
end

def self.resolve(path)
  return nil unless File.file?(path)
  @headers ||= []
  fetch_data(path)
end