module Alchemy
  class Site < ActiveRecord::Base
    attr_accessible :host, :aliases, :name, :public, :redirect_to_primary_host

    # validations
    validates_presence_of :host
    validates_uniqueness_of :host

    # associations
    has_many :languages

    scope :published, -> { where(public: true) }

    # concerns
    include Alchemy::Site::Layout

    # Returns true if this site is the current site
    def current?
      self.class.current == self
    end

    # Returns the path to site's view partial.
    #
    # Site view partials live in +app/views/alchemy/site_layouts+
    #
    # Please use <tt>rails g alchemy:site_layouts</tt> to generate partials for all your sites.
    #
    def to_partial_path
      "alchemy/site_layouts/#{layout_partial_name}"
    end

    class << self
      def current=(v)
        Thread.current[:alchemy_current_site] = v
      end

      def current
        Thread.current[:alchemy_current_site] || default
      end

      def default
        Site.first
      end

      def find_for_host(host)
        # These are split up into two separate queries in order to run the
        # fastest query first (selecting the domain by its primary host name).
        #
        where(host: host).first || find_in_aliases(host) || default
      end

      def find_in_aliases(host)
        return nil if host.blank?

        all.find do |site|
          site.aliases.split.include?(host) if site.aliases.present?
        end
      end
    end

    before_create do
      # If no languages are present, create a default language based
      # on the host app's Alchemy configuration.

      if languages.empty?
        default_language = Alchemy::Config.get(:default_language)
        languages.build(
          name:           default_language['name'],
          language_code:  default_language['code'],
          frontpage_name: default_language['frontpage_name'],
          page_layout:    default_language['page_layout'],
          public:         true,
          default:        true
        )
      end
    end

  end
end