require 'capybara/node/finders'
require 'capybara/node/actions'
require 'capybara/node/matchers'

module Capybara

  ##
  #
  # A {Capybara::Node} represents either an element on a page through the subclass
  # {Capybara::Element} or a document through {Capybara::Document}.
  #
  # Both types of Node share the same methods, used for interacting with the
  # elements on the page. These methods are divided into three categories,
  # finders, actions and matchers. These are found in the modules
  # {Capybara::Node::Finders}, {Capybara::Node::Actions} and {Capybara::Node::Matchers}
  # respectively.
  #
  # A {Capybara::Session} exposes all methods from {Capybara::Document} directly:
  #
  #     session = Capybara::Session.new(:rack_test, my_app)
  #     session.visit('/')
  #     session.fill_in('Foo', :with => 'Bar')    # from Capybara::Node::Actions
  #     bar = session.find('#bar')                # from Capybara::Node::Finders
  #     bar.select('Baz', :from => 'Quox')        # from Capybara::Node::Actions
  #     session.has_css?('#foobar')               # from Capybara::Node::Matchers
  #
  class Node
    attr_reader :session, :base

    include Capybara::Node::Finders
    include Capybara::Node::Actions
    include Capybara::Node::Matchers

    def initialize(session, base)
      @session = session
      @base = base
    end

  protected

    def driver
      session.driver
    end
  end

  ##
  #
  # A {Capybara::Element} represents a single element on the page. It is possible
  # to interact with the contents of this element the same as with a document:
  #
  #     session = Capybara::Session.new(:rack_test, my_app)
  #
  #     bar = session.find('#bar')              # from Capybara::Node::Finders
  #     bar.select('Baz', :from => 'Quox')      # from Capybara::Node::Actions
  #
  # {Capybara::Element} also has access to HTML attributes and other properties of the
  # element:
  #
  #      bar.value
  #      bar.text
  #      bar[:title]
  #
  # @see Capybara::Node
  #
  class Element < Node

    ##
    #
    # @return [Object]    The native element from the driver, this allows access to driver specific methods
    #
    def native
      base.native
    end

    ##
    #
    # @deprecated node is deprecated, please use {Capybara::Element#native} instead
    #
    def node
      Capybara.deprecate("node", "native")
      native
    end

    ##
    #
    # @return [String]    The text of the element
    #
    def text
      base.text
    end

    ##
    #
    # Retrieve the given attribute
    #
    #     element[:title] # => HTML title attribute
    #
    # @param  [Symbol] attribute     The attribute to retrieve
    # @return [String]               The value of the attribute
    #
    def [](attribute)
      base[attribute]
    end

    ##
    #
    # @return [String]    The value of the form element
    #
    def value
      base.value
    end

    ##
    #
    # Set the value of the form element to the given value.
    #
    # @param [String] value    The new value
    #
    def set(value)
      base.set(value)
    end

    ##
    #
    # Select this node if is an option element inside a select tag
    #
    def select_option
      base.select_option
    end

    ##
    #
    # Unselect this node if is an option element inside a multiple select tag
    #
    def unselect_option
      base.unselect_option
    end

    ##
    #
    # Click the Element
    #
    def click
      base.click
    end

    ##
    #
    # @return [String]      The tag name of the element
    #
    def tag_name
      base.tag_name
    end

    ##
    #
    # Whether or not the element is visible. Not all drivers support CSS, so
    # the result may be inaccurate.
    #
    # @return [Boolean]     Whether the element is visible
    #
    def visible?
      base.visible?
    end

    ##
    #
    # An XPath expression describing where on the page the element can be found
    #
    # @return [String]      An XPath expression
    #
    def path
      base.path
    end

    ##
    #
    # Trigger any event on the current element, for example mouseover or focus
    # events. Does not work in Selenium.
    #
    # @param [String] event       The name of the event to trigger
    #
    def trigger(event)
      base.trigger(event)
    end

    ##
    #
    # Drag the element to the given other element.
    #
    #     source = page.find('#foo')
    #     target = page.find('#bar')
    #     source.drag_to(target)
    #
    # @param [Capybara::Element] node     The element to drag to
    #
    def drag_to(node)
      base.drag_to(node.base)
    end

    def inspect
      %(#<Capybara::Element tag="#{tag_name}" path="#{path}">)
    rescue NotSupportedByDriverError
      %(#<Capybara::Element tag="#{tag_name}">)
    end

  end

  ##
  #
  # A {Capybara::Document} represents an HTML document. Any operation
  # performed on it will be performed on the entire document.
  #
  # @see Capybara::Node
  #
  class Document < Node
    def inspect
      %(#<Capybara::Document>)
    end
  end
end