defmodule Mix.Tasks.WhiteBread.Run do
  use Mix.Task

  @shortdoc "Runs all the feature files with WhiteBread"

  def run(argv) do
    {options, arguments, _} = OptionParser.parse(argv)

    case arguments do
      [context_name | _ ] -> run(context_name, options)
      [] -> Mix.raise "Expected context module to be given. Use `mix white_bread.run Context`"
    end

  end

  def run(context_name, _options) do
    {context, []} = Code.eval_string(context_name)
    result = WhiteBread.run(context)

    result
    |> WhiteBread.FinalResultPrinter.text
    |> IO.puts 

    %{failures: failures} = result
    System.at_exit fn _ ->
      if failures > 0, do: exit({:shutdown, 1})
    end
  end

end