module PagesCms
  class Article < ActiveRecord::Base
    includes MarkdownRenderer

    def to_param
      "#{id}-#{title.parameterize}"
    end

    belongs_to :account
    belongs_to :image

    validates :title,   presence: true
    validates :tags,    presence: true

    validate :xor_article
    validate :has_account


    def content?
      content.present?
    end

    def content_md?
      content_md.present?
    end

    def content_either
      if content_md?
        self.content_md_rendered
      elsif content?
        self.content
      else
        'Article not saved properly.'
      end
    end

    def content_md=(value)
      old = value
      if value.nil?
        new = value
      else
        new = markdown(value)
      end
      self[:content_md_rendered] = new
      self[:content_md] = old
    end

    def tags=(val)
      write_attribute(:tags, val.strip.gsub(/\s+/, '_').split(',') )
    end

    def self.published
      self.where('archived != true AND draft != true')
    end

    def article_status
      if self.draft && !self.archived
        'Draft'
      elsif self.archived && !self.draft
        'Archived'
      elsif !self.draft && !self.archived
        'Published'
      elsif self.draft && self.archived
        'Archived'
      end
    end

    scope :search, -> (search)  { where('content ILIKE ? OR tags @> ? OR title ILIKE ? ',"#{search}",'{' + search + '}',"#{search}") }
    scope :status, -> (status) do
      case status
        when 'Archived'
          where(archived: true)
        when 'Drafts'
          where(draft: true)
        when 'Published'
          where('archived != true AND draft != true')
        else
          all
      end
    end

    def xor(a,b)
      (a || b) && !(a && b)
    end

    private
      def xor_article
        unless xor(content_md?, content?)
          errors.add(:base, "Content can't be blank")
        end
      end

      def has_account
        if self.account.nil?
          errors.add(:base, 'Must be associated with an account')
        end
      end

  end
end