require 'mail'
class Spotlight::Exhibit < ActiveRecord::Base
  DEFAULT = 'default'.freeze
  has_many :roles
  has_many :searches
  has_many :about_pages
  has_many :feature_pages
  has_one :home_page
  has_many :home_pages
  has_many :users, through: :roles, class_name: '::User'
  has_many :custom_fields

  belongs_to :blacklight_configuration, class_name: Spotlight::BlacklightConfiguration
  accepts_nested_attributes_for :blacklight_configuration
  accepts_nested_attributes_for :searches
  accepts_nested_attributes_for :about_pages
  accepts_nested_attributes_for :feature_pages
  accepts_nested_attributes_for :roles, allow_destroy: true
  delegate :blacklight_config, to: :blacklight_configuration

  serialize :facets, Array
  serialize :contact_emails, Array

  after_create :add_default_home_page
  before_save :sanitize_description
  validate :name, :title, presence: true
  validate :valid_emails
  acts_as_tagger

  # This is necessary so the form will draw as if we have nested attributes (fields_for).
  def contact_emails
    super.each do |e|
      def e.persisted?
        false
      end
    end
  end

  # The attributes setter is required so the form will draw as if we have nested attributes (fields_for)
  def contact_emails_attributes=(emails)
    attributes_collection = emails.is_a?(Hash) ? emails.values : emails
    self.contact_emails = attributes_collection.map {|e| e['email']}.reject(&:blank?)
  end

  def main_about_page
    about_pages.published.first
  end

  # Find or create the default exhibit
  def self.default
    self.find_or_create_by!(name: DEFAULT) do |e|
      e.title = 'Default exhibit'.freeze
      e.blacklight_configuration = Spotlight::BlacklightConfiguration.create!
    end
  end

  def has_browse_categories?
    searches.published.any?
  end

  protected

  def valid_emails
    contact_emails.each do |email|
      begin
        parsed = Mail::Address.new(email)
      rescue Mail::Field::ParseError => e
      end
      errors.add :contact_emails, "#{email} is not valid" unless !parsed.nil? && parsed.address == email && parsed.local != email #cannot be a local address
    end
  end

  def add_default_home_page
    Spotlight::HomePage.create(exhibit: self).save
  end

  def sanitize_description
    self.description = HTML::FullSanitizer.new.sanitize(description) if description_changed?
  end
end