module Locomotive
  class ContentType

    include Locomotive::Mongoid::Document

    ## extensions ##
    include CustomFields::Source
    include Extensions::ContentType::ItemTemplate

    ## fields ##
    field :name
    field :description
    field :slug
    field :highlighted_field_id, :type => BSON::ObjectId
    field :group_by_field_id, :type => BSON::ObjectId
    field :order_by
    field :order_direction, :default => 'asc'
    field :public_form_enabled, :type => Boolean, :default => false
    field :public_form_accounts, :type => Array

    ## associations ##
    belongs_to  :site,      :class_name => 'Locomotive::Site'
    has_many    :entries,   :class_name => 'Locomotive::ContentEntry', :dependent => :destroy

    ## named scopes ##
    scope :ordered, :order_by => :updated_at.desc

    ## indexes ##
    index [[:site_id, Mongo::ASCENDING], [:slug, Mongo::ASCENDING]]

    ## callbacks ##
    before_validation   :normalize_slug
    after_validation    :bubble_fields_errors_up
    before_save         :set_default_values
    # after_destroy       :remove_uploaded_files

    ## validations ##
    validates_presence_of   :site, :name, :slug
    validates_uniqueness_of :slug, :scope => :site_id
    validates_size_of       :entries_custom_fields, :minimum => 1, :message => :array_too_short

    ## behaviours ##
    custom_fields_for :entries

    ## methods ##

    # def groupable?
    #   self.group_by_field && group_by_field.category?
    # end

    def highlighted_field
      self.entries_custom_fields.find(self.highlighted_field_id)
    end

    def group_by_field
      self.entries_custom_fields.find(self.group_by_field_id)
    end

    def order_manually?
      self.order_by == '_position_in_list'
    end

    def asc_order?
      self.order_direction.blank? || self.order_direction == 'asc'
    end

    def to_presenter
      Locomotive::ContentTypePresenter.new(self)
    end

    def as_json(options = {})
      self.to_presenter.as_json
    end

    # def list_or_group_contents
    #   if self.groupable?
    #     groups = self.contents.klass.send(:"group_by_#{self.group_by_field._alias}", :ordered_contents)
    #
    #     # look for items with no category or unknown ones
    #     items_without_category = self.contents.find_all { |c| !self.group_by_field.category_ids.include?(c.send(self.group_by_field_name)) }
    #     if not items_without_category.empty?
    #       groups << { :name => nil, :items => items_without_category }
    #     else
    #       groups
    #     end
    #   else
    #     self.ordered_contents
    #   end
    # end
    #
    # def latest_updated_contents
    #   self.contents.latest_updated.reject { |c| !c.persisted? }
    # end
    #
    # def ordered_contents(conditions = {})
    #   column = self.order_by.to_sym
    #
    #   list = (if conditions.nil? || conditions.empty?
    #     self.contents
    #   else
    #     conditions_with_names = {}
    #
    #     conditions.each do |key, value|
    #       # convert alias (key) to name
    #       field = self.entries_custom_fields.detect { |f| f._alias == key }
    #
    #       case field.kind.to_sym
    #       when :category
    #         if (category_item = field.category_items.where(:name => value).first).present?
    #           conditions_with_names[field._name.to_sym] = category_item._id
    #         end
    #       else
    #         conditions_with_names[field._name.to_sym] = value
    #       end
    #     end
    #
    #     self.contents.where(conditions_with_names)
    #   end).sort { |a, b| (a.send(column) && b.send(column)) ? (a.send(column) || 0) <=> (b.send(column) || 0) : 0 }
    #
    #   return list if self.order_manually?
    #
    #   self.asc_order? ? list : list.reverse
    # end
    #
    # def sort_contents!(ids)
    #   ids.each_with_index do |id, position|
    #     self.contents.find(BSON::ObjectId(id))._position_in_list = position
    #   end
    #   self.save
    # end
    #
    # def highlighted_field
    #   self.entries_custom_fields.detect { |f| f._name == self.highlighted_field_name }
    # end
    #
    # def group_by_field
    #   @group_by_field ||= self.entries_custom_fields.detect { |f| f._name == self.group_by_field_name }
    # end

    protected

    def set_default_values
      self.order_by ||= 'created_at'
      self.highlighted_field_id ||= self.entries_custom_fields.first._id
    end

    def normalize_slug
      self.slug = self.name.clone if self.slug.blank? && self.name.present?
      self.slug.permalink! if self.slug.present?
    end

    def bubble_fields_errors_up
      return if self.errors[:entries_custom_fields].empty?

      self.errors.set(:entries_custom_fields, [])

      self.entries_custom_fields.each do |field|
        next if field.valid?
        self.errors.add(:entries_custom_fields, field.errors.to_a)
      end
    end

  end
end