class Lookbook::Engine

def app_name
  name = if Rails.application.class.respond_to?(:module_parent_name)
    Rails.application.class.module_parent_name
  else
    Rails.application.class.parent_name
  end
  name.underscore
end

def component_paths
  @_component_paths ||= Array(PathUtils.to_absolute(opts.components_path))
end

def file_watcher
  @_file_watcher ||= FileWatcher.new(force_polling: opts.listen_use_polling)
end

def hooks
  @_hooks ||= HookStore.init_from_config
end

def inputs
  @_inputs ||= InputStore.init_from_config
end

def last_changed
  @_last_changed ||= (Time.now.to_f * 1000).to_i
end

def listen?
  opts.listen && process.supports_listening?
end

def mark_changed
  @_last_changed = nil
end

def mount_path
  routes.find_script_name({})
end

def mounted?
  mount_path.present?
end

def opts
  Lookbook.config
end

def page_paths
  @_page_paths ||= PathUtils.normalize_paths(opts.page_paths)
end

def pages
  @_pages ||= PageCollection.new
end

def panels
  @_panels ||= PanelStore.init_from_config
end

def parser
  @_parser ||= PreviewParser.new(opts.preview_paths, Engine.tags)
end

def preview_paths
  @_preview_paths ||= PathUtils.normalize_paths(opts.preview_paths)
end

def previews
  @_previews ||= PreviewCollection.new
end

def process
  @_process ||= Process.new(env: Rails.env)
end

def run_hooks(event_name, *args)
  Engine.hooks.for_event(event_name).each do |hook|
    hook.call(Lookbook, *args)
  end
end

def tags
  @_tags ||= TagStore.init_from_config
end

def websocket
  if mounted?
    use_websocket = opts.auto_refresh && opts.listen && process.supports_listening?
    @websocket ||= use_websocket ? Websocket.new(mount_path, logger: Lookbook.logger) : Websocket.noop
  else
    Websocket.noop
  end
end