config.ex

defmodule AlchemicAvatar.Config do
  @moduledoc """
  This module provides configuration.

  The following are valid configuration items.

  | name               | type    | default  |
  | :----------------- | :------ | -------: |
  | cache_base_path    | binary  | "static" |
  | colors_palette     | atom    | :google or :iwanthue |
  | weight             | int     | 300   |
  | annotate_position  | binary  | "-0+5" |
  | app_name  | atom  | N/A |
  """

  defp config do 
    Application.get_all_env(:alchemic_avatar)
  end

  @doc """
  cache_base_path
  """
  def cache_base_path do
    Keyword.get(config, :cache_base_path, "static")
  end

  @doc """
  app_name
  """
  def app_name do
    case Keyword.fetch(config, :app_name) do
      {:ok, name} -> name
      _ ->
        raise ArgumentError, message: """
          you need set app_name in your config
        """
    end
  end

  @doc """
  colors_palette
  """
  def colors_palette do
    Keyword.get(config, :colors_palette, :google)
  end

  @doc """
  weight
  """
  def weight do
    Keyword.get(config, :weight, 300)
  end

  @doc """
  annotate_position
  """
  def annotate_position do
    Keyword.get(config, :annotate_position, "-0+5")
  end
end