defmodule Typeracer do
  @endpoint "https://typeracerdata.appspot.com/users"

  def get_user(id, http_lib \\ HTTPoison) do
    case id |> user_query_url |> http_lib.get do
      {:ok, %{status_code: 404}} ->
        {:error, :id_not_found}
      {:ok, response = %{status_code: 200}} ->
        decode(response)
      error -> error
    end
  end

  defp decode(response) do
    case Poison.decode(response.body) do 
      {:ok, map} -> to_user(map)
      error -> error
    end
  end

  defp to_user(map = %{
    "tstats" => %{
      "bestGameWpm" => best_game_wpm,
      "cg" => completed_games,
      "gamesWon" => games_won,
      "level" => level,
      "recentAvgWpm" => recent_avg_wpm,
      "recentScores" => recent_scores,
      "wpm" => wpm
    }
  }) do

  user = %Typeracer.User{
    id: map["id"],
    name: map["name"],
    last_name: map["lastName"],
    country: map["country"],
    level: level,
    best_game_wpm: best_game_wpm,
    completed_games: completed_games,
    games_won: games_won,
    recent_avg_wpm: recent_avg_wpm,
    recent_scores: recent_scores,
    wpm: wpm
  }
  {:ok, user}
  end

  defp to_user(_) do
    {:error, "Unrecognized response"}
  end

  defp user_query_url(id) do
    @endpoint <> "?id=tr:" <> id
  end
end