class AWS::EC2::ConfigTransform

def capitalize_input_descriptors(desc)
  desc.map do |d|
    case
    when d.kind_of?(Hash) && d.key?(:structure)
      d.merge(:structure =>
              capitalize_input_structure(d[:structure]))
    when d.kind_of?(Hash) && d.key?(:list)
      d.merge(:list =>
              capitalize_input_descriptors(d[:list]))
    else
      d
    end
  end
end

def capitalize_input_structure(struct)
  struct.inject({}) do |m, (name, desc)|
    name = name[0,1].upcase + name[1..-1]
    m[name] = capitalize_input_descriptors(desc)
    m
  end
end

def transform(api_config)
  ["RunInstances",
   "DetachVolume",
   "AttachVolume",
   "CreateSnapshot",
   "CreateVolume",
   "DescribeImageAttribute",
   "DescribeInstanceAttribute"].each do |(op, wrapper)|
    if op_config = api_config[:operations][op]
      op_config[:output] = op_config[:output].first.values.first
    end
  end
  api_config[:operations].each do |op, op_config|
    op_config[:input] =
      capitalize_input_structure(op_config[:input])
  end
  api_config
end