xamal

defmodule Xamal.Commands.Hook do
  @moduledoc """
  Hook script execution commands.

  Hooks are shell scripts in the hooks_path directory (default: .xamal/hooks).
  """

  @doc """
  Build the command to run a hook script locally.
  """
  def run(config, hook_name) do
    [hook_file(config, hook_name)]
  end

  @doc """
  Build environment variables to pass to hook scripts.
  """
  def env(config, details \\ %{}, attrs \\ %{}) do
    service = Xamal.Configuration.service(config)
    version = config.version || ""

    base = %{
      "XAMAL_SERVICE" => service,
      "XAMAL_VERSION" => version,
      "XAMAL_HOSTS" => Xamal.Configuration.all_hosts(config) |> Enum.join(","),
      "XAMAL_COMMAND" => Map.get(details, :command, ""),
      "XAMAL_SUBCOMMAND" => Map.get(details, :subcommand, ""),
      "XAMAL_DESTINATION" => config.destination || "",
      "XAMAL_ROLE" => Map.get(details, :role, ""),
      "XAMAL_RECORDED_AT" => Map.get(attrs, :recorded_at, ""),
      "XAMAL_PERFORMER" => Map.get(attrs, :performer, ""),
      "XAMAL_SERVICE_VERSION" => "#{service}@#{version}",
      "XAMAL_LOCK" => Map.get(attrs, :lock_status, "false")
    }

    Map.merge(base, Map.get(details, :extra_env, %{}))
  end

  @doc """
  Check if a hook file exists.
  """
  def hook_exists?(config, hook_name) do
    File.exists?(hook_file(config, hook_name))
  end

  defp hook_file(config, hook_name) do
    Path.join(Xamal.Configuration.hooks_path(config), hook_name)
  end
end