defmodule UI do
  require Logger

  def confirm(msg), do: confirm(msg, false)

  def confirm(_msg, true), do: true

  def confirm(msg, _default) do
    IO.write("#{msg} (y/n) ")

    case IO.gets("") do
      "y\n" -> true
      "Y\n" -> true
      _ -> false
    end
  end

  def flush do
    Logger.flush()
  end

  def report_step(msg), do: info(msg)
  def report_step(msg, detail), do: info(msg, detail)

  def begin_step(msg, detail \\ nil) do
    if is_nil(detail) do
      Logger.info(IO.ANSI.format([:green, msg, :reset], colorize?()))
    else
      Logger.info(IO.ANSI.format([:green, msg, :reset, ": ", :cyan, detail, :reset], colorize?()))
    end
  end

  def end_step(msg, detail \\ nil) do
    if is_nil(detail) do
      Logger.info(IO.ANSI.format([:yellow, msg, :reset], colorize?()))
    else
      Logger.info(
        IO.ANSI.format([:yellow, msg, :reset, ": ", :cyan, detail, :reset], colorize?())
      )
    end
  end

  def inspect(item, label) do
    Logger.debug(label, Kernel.inspect(item, pretty: true, binaries: :as_strings))
    Logger.flush()
    item
  end

  def debug(msg) do
    Logger.debug(IO.ANSI.format([:green, msg, :reset], colorize?()))
  end

  def debug(msg, detail) do
    Logger.debug(IO.ANSI.format([:green, msg, :reset, ": ", :cyan, detail, :reset], colorize?()))
  end

  def info(msg) do
    Logger.info(IO.ANSI.format([:green, msg, :reset], colorize?()))
  end

  def info(msg, detail) do
    Logger.info(IO.ANSI.format([:green, msg, :reset, ": ", :cyan, detail, :reset], colorize?()))
  end

  def warn(msg) do
    Logger.warning(IO.ANSI.format([:yellow, msg, :reset], colorize?()))
  end

  def warn(msg, detail) do
    Logger.warning(
      IO.ANSI.format([:yellow, msg, :reset, ": ", :cyan, detail, :reset], colorize?())
    )
  end

  def error(msg) do
    Logger.error(IO.ANSI.format([:red, msg, :reset], colorize?()))
  end

  def error(msg, detail) do
    Logger.error(IO.ANSI.format([:red, msg, :reset, ": ", :cyan, detail, :reset], colorize?()))
  end

  defp colorize? do
    :prim_tty.isatty(:stderr)
  end
end