module Doorkeeper

def authenticate(request, methods = Doorkeeper.config.access_token_methods)
  OAuth::Token.authenticate(request, *methods)
end

def configuration
  @config || configure
end

def configure(&block)
  @config = Config::Builder.new(&block).build
  setup
  @config
end

def configured?
  !@config.nil?
end

def gem_version
  ::Gem::Version.new(::Doorkeeper::VERSION::STRING)
end

def run_orm_hooks
  config.clear_cache!
  if @orm_adapter.respond_to?(:run_hooks)
    @orm_adapter.run_hooks
  else
    ::Kernel.warn <<~MSG.strip_heredoc
      [DOORKEEPER] ORM "#{configuration.orm}" should move all it's setup logic under `#run_hooks` method for
      the #{@orm_adapter.name}. Later versions of Doorkeeper will no longer support `setup_orm_models` and
      `setup_application_owner` API.
    MSG
  end
end

def setup
  setup_orm_adapter
  # Deprecated, will be removed soon
  unless configuration.orm == :active_record
    setup_orm_models
    setup_application_owner
  end
end

def setup_application_owner
  @orm_adapter.initialize_application_owner!
end

def setup_orm_adapter
  @orm_adapter = "doorkeeper/orm/#{configuration.orm}".classify.constantize
rescue NameError => e
  raise e, "ORM adapter not found (#{configuration.orm})", <<-ERROR_MSG.strip_heredoc
    [DOORKEEPER] ORM adapter not found (#{configuration.orm}), or there was an error
    trying to load it.
    You probably need to add the related gem for this adapter to work with
    doorkeeper.
  ERROR_MSG
end

def setup_orm_models
  @orm_adapter.initialize_models!
end