defmodule Mix.Tasks.Mob.Devices do
  use Mix.Task

  @shortdoc "List all connected Android and iOS devices"

  @moduledoc """
  Scans for connected Android devices (via adb) and iOS simulators
  (via xcrun simctl) and prints their status.

      mix mob.devices

  Useful for diagnosing connection issues before running mix mob.connect.
  """

  alias MobDev.Discovery.{Android, IOS}
  alias MobDev.Device

  @impl Mix.Task
  def run(_args) do
    Mix.Task.run("app.config")

    android = Android.list_devices()
    ios     = IOS.list_devices()

    IO.puts("\n#{IO.ANSI.cyan()}Android#{IO.ANSI.reset()}")

    if android == [] do
      IO.puts("  (none — is adb installed? Any devices connected?)")
    else
      Enum.each(android, fn d ->
        IO.puts("  " <> Device.summary(d))
        print_android_hints(d)
      end)
    end

    IO.puts("\n#{IO.ANSI.cyan()}iOS#{IO.ANSI.reset()}")

    if ios == [] do
      IO.puts("  (none — is a simulator running?)")
    else
      Enum.each(ios, fn d ->
        IO.puts("  " <> Device.summary(d))
      end)
    end

    IO.puts("")
  end

  defp print_android_hints(%{status: :unauthorized}) do
    IO.puts("    #{IO.ANSI.yellow()}→ Check device for 'Allow USB debugging?' prompt#{IO.ANSI.reset()}")
  end

  defp print_android_hints(%{platform: :android, serial: serial}) do
    case Android.developer_mode(serial) do
      :disabled ->
        IO.puts("    #{IO.ANSI.yellow()}→ Enable Developer Mode: Settings → About → tap Build Number 7×#{IO.ANSI.reset()}")
      _ -> :ok
    end
  end

  defp print_android_hints(_), do: :ok
end