class Aws::Stubbing::StubData

def apply_data(data, stub)
  ParamValidator.new(@rules, validate_required: false, input: false).validate!(data)
  DataApplicator.new(@rules).apply_data(data, stub)
end

def initialize(operation)
  @rules = operation.output
  @pager = operation[:pager]
end

def remove_checksums(stub)
  if @rules && @rules.shape.is_a?(Seahorse::Model::Shapes::StructureShape)
    @rules.shape.members.each do |key, member|
      if member.location == 'header' && member.location_name.start_with?('x-amz-checksum-')
        stub[key] = nil
      end
    end
  end
end

def remove_paging_tokens(stub)
  if @pager
    @pager.instance_variable_get("@tokens").keys.each do |path|
      if divide = (path[' || '] || path[' or '])
        path = path.split(divide)[0]
      end
      parts = path.split(/\b/)
      # if nested struct/expression, EmptyStub auto-pop "string"
      # currently not support remove "string" for nested/expression
      # as it requires reverse JMESPATH search
      stub[parts[0]] = nil if parts.size == 1
    end
    if more_results = @pager.instance_variable_get('@more_results')
      parts = more_results.split(/\b/)
      # if nested struct/expression, EmptyStub auto-pop false value
      # no further work needed
      stub[parts[0]] = false if parts.size == 1
    end
  end
end

def stub(data = {})
  stub = EmptyStub.new(@rules).stub
  remove_paging_tokens(stub)
  remove_checksums(stub)
  apply_data(data, stub)
  stub
end