class Product < ActiveRecord::Base
  NEVER_BUILT = 2
  BUILD_COMPLETED = 0
  BUILD_FAILED = 1

  ATTRS_TO_CLONE = [ 'build_path', 'build', 'build', 'counter', 'ks', 'menu', 'tar', 'use_cron', 'cron_tab' ]

  validates :name, :presence => true, :uniqueness => {:scope => :platform_id}
  validates :platform_id, :presence => true
  validates :build_status, :inclusion => { :in => [ NEVER_BUILT, BUILD_COMPLETED, BUILD_FAILED ] }

  belongs_to :platform

  has_attached_file :tar
  validates_attachment_content_type :tar, :content_type => ["application/gnutar", "application/x-compressed", "application/x-gzip"], :message => I18n.t('layout.products.invalid_content_type')

  after_validation :merge_tar_errors

  scope :recent, order("name ASC")

  before_save :destroy_tar?

  def delete_tar
    @delete_tar ||= "0"
  end

  def delete_tar=(value)
    @delete_tar = value
  end

  def can_clone?
    is_template
  end

  def can_build?
    !is_template
  end

  def clone_from!(template)
    raise "Only templates can be cloned" unless template.can_clone?
    attrs = ATTRS_TO_CLONE.inject({}) {|result, attr|
      result[attr] = template.send(attr)
      result
    }

    self.attributes = attrs
  end

  def cron_command
    self.name
  end

  def cron_tab
    @cron_tab ||= self[:cron_tab].present? ? self[:cron_tab] : "* * * * *"
  end

  ["minutes", "hours", "days", "months", "weekdays"].each_with_index do |meth, index|
    class_eval <<-EOF
      def cron_tab_#{meth}
        value = cron_tab.split(/\s+/)[#{index}]
        value == "*" ? [] : value.split(/\s*,*\s*/).collect{|x| x.to_i }
      end

      EOF
  end

  protected

    def destroy_tar?
      self.tar.clear if @delete_tar == "1"
    end

    def merge_tar_errors
      errors[:tar] += errors[:tar_content_type]
      errors[:tar_content_type] = []
    end


end