defmodule Mix.Tasks.Dockerize.Init do
  alias IO.ANSI
  require Logger

  @moduledoc """
  Initialize Dockerize configurations

  Usage: `mix dockerize.init --app my_app`

  Supported arguments:

  * `--app`
  * `--path`
  * `--force`
  * `--phoenix-assets` or `--no-phoenix-assets`
  * `--elixir-version`
  """

  def run(opts) do
    parse_args(opts)
    |> Keyword.put(:gen_command, Enum.join(["mix dockerize.init" | opts], " "))
    |> Dockerize.Generate.gen()
  end

  defp parse_args(args) do
    OptionParser.parse(args,
      strict: [
        app: :string,
        force: :boolean,
        phoenix_assets: :boolean,
        elixir_version: :string,
        path: :string
      ]
    )
    |> case do
      {options, [], []} ->
        options

      {_, args, []} ->
        IO.puts([
          "Unrecognized arguments: ",
          ANSI.red(),
          Enum.map_join(args, " ", &Kernel.inspect/1),
          ANSI.reset(),
          "\n"
        ])

        print_usage()
        System.halt(1)

      {_, _, invalid} ->
        IO.puts(["Unrecognized options: ", ANSI.red(), inspect(invalid), ANSI.reset(), "\n"])
        print_usage()
        System.halt(1)
    end
  end

  defp print_usage, do: Mix.Tasks.Help.run(["dockerize.init"])
end