defmodule Secret do

  def archive(session, channel) do
    {:ok, oldest} = UrbitEx.API.Graph.fetch_oldest(session, channel, [count: 999])
    recent = last(oldest)
    Map.merge(oldest, other(session, channel, recent))
  end

  def other(_session, _channel, nil), do: %{}

  def other(session, channel, last_index) do
    {:ok, less} = UrbitEx.API.Graph.fetch_newer_than(session, channel, last_index, [count: 999])
    recent = last(less)
    Map.merge(less, other(session, channel, recent))
  end

  def last(%{}), do: nil

  def last(map), do: Map.keys(map) |> Enum.max()

  def clean(graph) do
    graph
    |> UrbitEx.Graph.to_list()
    |> Enum.filter(& &1.post != :deleted)
    |> Enum.sort_by(& &1.post."time-sent")
    |> Enum.map(& prettify(&1.post))
  end

  def prettify(:deleted), do: "\n\n deleted \n\n"


  def prettify(post) do
    """
      #{post.author} on #{post."time-sent"}\n\n
      #{Jason.encode!(post.contents)}
    """
  end




end