defmodule Ondix.Error do
  defexception [:message]
end

defmodule Ondix.State do
  use Agent

  def start_link(token) do
    Agent.start_link(fn -> token end, name: __MODULE__)
  end

  def token() do
    Agent.get(__MODULE__, &(&1))
  end
end

defmodule Ondix.Client do
  use HTTPoison.Base

  def with_token(token) do
    Ondix.State.start_link(token)
    Ondix.Client
  end

  def token(), do: Ondix.State.token()

  @url (case System.get_env("API_URL") do
          nil -> "https://api.orchestre-ile.com/api/v1/"
          a -> a
        end)

  def process_response_body(body) do
    d = body
        |> Poison.decode
    case d do
      {:ok, res} -> Ondix.Utils.atomize_map(res)
      error -> {:error, error}
    end
  end

  def fetch(url), do: get(@url <> url, [{"X-API-TOKEN", token()}]) |> extract
  def fetchNoPrefix(url), do: get(url, [{"X-API-TOKEN", token()}]) |> extract

  def extract({:ok, %{ body: body }}), do: body
  def extract(a), do: a

  def getOne(url, relations) do
    url
    |> Ondix.Utils.prepareRelations(relations)
    |> fetch
  end

  def getList(url, clauses, page) do
    url
    |> Ondix.Utils.prepareClauses(clauses)
    |> Ondix.Utils.preparePage(page)
    |> fetch
    |> Ondix.Collection.fromResponse()
  end

  def ping() do
    fetch("ping")
  end
end