class Inspec::Plugin::V2::Registry

def __reset
  @registry.clear
end

def any_load_failures?
  !plugin_statuses.select(&:load_exception).empty?
end

def find_activator(filters = {})
  matched_plugins = find_activators(filters)
  if matched_plugins.count > 1
    raise Inspec::Plugin::V2::LoadError, "Plugin hooks search returned multiple results for filter #{filters.inspect} - use more filters, or use find_activators (plural)"
  elsif matched_plugins.empty?
    raise Inspec::Plugin::V2::LoadError, "Plugin hooks search returned zero results for filter #{filters.inspect}"
  end
  matched_plugins.first
end

def find_activators(filters = {})
  plugin_statuses.map(&:activators).flatten.select do |act|
    %i{plugin_name plugin_type activator_name implementation_class}.all? do |criteria|
      !filters.key?(criteria) || act[criteria] == filters[criteria]
    end
  end
end

def find_status_by_class(klass)
  registry.values.detect { |status| status.plugin_class == klass }
end

def initialize
  @registry = {}
end

def known_count
  registry.values.count
end

def loaded_count
  loaded_plugin_names.count
end

def loaded_plugin?(name)
  # HACK: Status is normally the source of truth for loadedness, unless it is a train plugin; then the Train::Registry is the source of truth.
  # Also, InSpec registry is keyed on Symbols; Train is keyed on Strings.
  return registry.dig(name.to_sym, :loaded) unless name.to_s.start_with?("train-")
  Train::Plugins.registry.key?(name.to_s.sub(/^train-/, ""))
end

def loaded_plugin_names
  registry.keys.select { |name| loaded_plugin?(name) }
end

def path_based_plugin?(name)
  known_plugin?(name.to_sym) && registry[name.to_sym].installation_type == :path
end

def register(name, status)
  if known_plugin? name
    Inspec::Log.debug "PluginLoader: refusing to re-register plugin '#{name}': an existing plugin with that name was loaded via #{registry[name].installation_type}-loading from #{registry[name].entry_point}"
  else
    registry[name.to_sym] = status
  end
end