<%-

  # Function to make a structured and sorted yaml representation out of a hash
  def recursive_hash_to_yml_string(hash, depth=0)
    spacer = ""
    depth.times { spacer += "  "}
    hash.keys.sort.each do |sorted_key|
      @yml_string += spacer + sorted_key + ": "
      if hash[sorted_key].is_a?(Array)
         keyspacer = ""
         sorted_key.length.times { keyspacer += " " }
         @yml_string += "\n"
         hash[sorted_key].each do |item|
           @yml_string += spacer + keyspacer + "- " + item +"\n"
         end
      elsif hash[sorted_key].is_a?(Hash)
        @yml_string += "\n"
        recursive_hash_to_yml_string(hash[sorted_key], depth+1)
      else
        @yml_string += "#{hash[sorted_key].to_s}\n"
      end
    end
  end

  # Function to transform shorted write up of the keys into full hash representation
  def transform(hash)
  return_vals = []

  hash.each do |key,val|
    if m = /^([^.]+)\.(.*)$/.match(key)
      temp = { m[1] => { m[2] => val } }
      transform(temp).each do |stuff|
        return_vals << stuff
      end
    else
      if val.is_a?(Hash)
        transform(val).each do |stuff|
          return_vals << { key => stuff }
        end
      else
        return_vals << { key => val }
      end
    end
  end

  return_vals
  end

  # Function to deep merge hashes with same keys
  class ::Hash
    def deep_merge_with_array_values_concatenated(hash)
    target = dup

    hash.keys.each do |key|
      if hash[key].is_a? Hash and self[key].is_a? Hash
        target[key] = target[key].deep_merge_with_array_values_concatenated(hash[key])
        next
      end

      if hash[key].is_a?(Array) && target[key].is_a?(Array)
        target[key] = target[key] + hash[key]
      else
        target[key] = hash[key]
      end
    end

    target
    end
  end

  # initial string
  @yml_string = "### MANAGED BY PUPPET ###\n"

  if !@instance_conf.empty?

    @yml_string += "---\n"

    ## Transform shorted keys into full write up
    transformed_config = transform(@instance_conf)

    # Merge it back into a hash
    tmphash = { }
    transformed_config.each do |subhash|
      tmphash = tmphash.deep_merge_with_array_values_concatenated(subhash)
    end

    # Transform it into yaml
    recursive_hash_to_yml_string(tmphash)

  end

-%>
<%= @yml_string -%>