defmodule Mix.Tasks.EzCalendar.StylesheetInstaller do
  @moduledoc """
  Functions for installing different stylesheets types.
  """

  def install(ext) do
    check_directory
    do_assets(ext)
  end

  defp check_directory do
    unless File.exists? "web/static/vendor" do
      Mix.raise """
      Can't find directory /web/static/vendor/, make sure you are in the root directory of your phoenix application.
      """
    end
  end

  defp do_assets ext do
    IO.puts "#{IO.ANSI.green}copying #{ext} file to web/static/vendor/ez_calendar.#{ext}"
    IO.puts "#{IO.ANSI.white}Edit this to fit your needs of your application.\nYou can find all of the #{ext} selectors generated by the html helpers in this file"

    from = Path.join([get_package_path, "lib/ez_calendar/html/assets", "ez_calendar.#{ext}"])
    to = Path.join([File.cwd!, "web/static/vendor", "ez_calendar.#{ext}"])

    File.cp_r from, to, fn(_, _) ->
      IO.gets("#{IO.ANSI.red}This will overwrite the existing #{ext} file and destroy any canges you have made. Continue? (y/n): ") == "y\n"
    end
  end

  defp get_package_path do
    __ENV__.file
    |> Path.dirname
    |> String.split("/lib/mix")
    |> hd
  end

end