module Hydra::AccessControls
  class Embargo < ActiveFedora::Base
    property :visibility_during_embargo, predicate: Hydra::ACL.visibilityDuringEmbargo, multiple:false
    property :visibility_after_embargo, predicate: Hydra::ACL.visibilityAfterEmbargo, multiple:false
    property :embargo_release_date, predicate: Hydra::ACL.embargoReleaseDate, multiple:false
    property :embargo_history, predicate: Hydra::ACL.embargoHistory


    # Hack until ActiveFedora supports activeTriples 0.3.0 (then we can just use super)
    def embargo_release_date_with_casting=(date)
      date = DateTime.parse(date) if date && date.kind_of?(String)
      self.embargo_release_date_without_casting = date
    end
    alias_method_chain :embargo_release_date=, :casting

    def active?
      (embargo_release_date.present? && Date.today < embargo_release_date)
    end

    # Deactivates the embargo and logs a message to the embargo_history property
    def deactivate!
      return unless embargo_release_date
      embargo_state = active? ? "active" : "expired"
      embargo_record = embargo_history_message(embargo_state, Date.today, embargo_release_date, visibility_during_embargo, visibility_after_embargo)
      self.embargo_release_date = nil
      self.visibility_during_embargo = nil
      self.visibility_after_embargo = nil
      self.embargo_history += [embargo_record]
    end

    def to_hash
      {}.tap do |doc|
        date_field_name = Hydra.config.permissions.embargo.release_date.sub(/_dtsi/, '')
        Solrizer.insert_field(doc, date_field_name, embargo_release_date, :stored_sortable)
        doc[::Solrizer.solr_name("visibility_during_embargo", :symbol)] = visibility_during_embargo unless visibility_during_embargo.nil?
        doc[::Solrizer.solr_name("visibility_after_embargo", :symbol)] = visibility_after_embargo unless visibility_after_embargo.nil?
        doc[::Solrizer.solr_name("embargo_history", :symbol)] = embargo_history unless embargo_history.nil?
      end
    end
    protected

      # Create the log message used when deactivating an embargo
      # This method may be overriden in order to transform the values of the passed parameters.
      def embargo_history_message(state, deactivate_date, release_date, visibility_during, visibility_after)
        I18n.t 'hydra.embargo.history_message', state: state, deactivate_date: deactivate_date, release_date: release_date,
          visibility_during: visibility_during, visibility_after: visibility_after
      end
  end
end