# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

defmodule KeysRenamePlugin do
  use Plugin
  require Logger
  def transform(dict, options) do
    if  not MapUtils.all_required_keys?(options, ["keys", "mode"]) do
      dict
    else
      keys = Map.keys(dict)
      keys_candidate = Map.keys(options["keys"])
      keys_to_rename = ListUtils.intersection(keys_candidate, keys)
      List.foldl(keys_to_rename , dict,
        fn k, acc ->
          new_key = options["keys"][k]
          value = dict[k]
          acc
            |> KeysAddPlugin.transform(%{"keys" => %{new_key => value}, "mode" => options["mode"]})
            |> KeysDeletePlugin.transform(%{"keys" => [k]})
        end)
    end
  end

end