class Comic < ActiveRecord::Base
  
  acts_as_cute_admin :display_name => :number, :order_scope => :publish_on
  
  before_validation_on_create :assign_number
  
  validates_presence_of :number
  validates_uniqueness_of :number
  
  if Rails.env.production? || Rails.env.preproduction?
    
    has_attached_file :image, 
      :storage => :s3,
      :s3_credentials => "#{Rails.root}/config/s3.yml",
      :s3_headers => { 'Expires' => 1.year.from_now.httpdate },
      :url => ':s3_url',
      :path => "comics/:id/:basename_:style_:timestamp.:extension",
      :styles => { :web => "930x930>" }
    
  else
  
    has_attached_file :image, :path => ":rails_root/public/system/comics/:id/:basename_:style.:extension",
      :url => "/system/comics/:id/:basename_:style.:extension", :styles => { :web => "930x930>" }
    
  end
  
  named_scope :published, lambda { { :conditions => ["publish_on <= ?", Date.today] } }
  named_scope :find_latest, :order => "publish_on DESC", :limit => 10
  named_scope :find_previous, lambda { |comic| { :conditions => ["publish_on < ?", comic.publish_on], 
    :order => "publish_on DESC", :limit => 1 } }
  named_scope :find_next, lambda { |comic| { :conditions => ["publish_on > ?", comic.publish_on], 
    :order => "publish_on ASC", :limit => 1 } }
  named_scope :ordered, :order => "publish_on"
  named_scope :reverse_ordered, :order => "publish_on DESC"
  
  def self.latest
    find_latest.published.first
  end
  
  def to_param
    number.to_s
  end
  
  def assign_number
    self.number = get_new_number unless number.present? && number > 0
  end
  
  def get_new_number
    self.class.find_latest.any? ? self.class.find_latest.first.number + 1 : 1
  end
  
  def previous
    self.class.find_previous(self).published.first
  end
  
  def next
    self.class.find_next(self).published.first
  end
  
  def name_or_date
    name.present? ? name : I18n.l(publish_on, :format => :cute_with_dayname)
  end
  
end