class ConfigurationFile < ActiveRecord::Base
  belongs_to :server
  belongs_to :file_type
  has_many :file_versions, -> { order('number DESC') }

  def self.create_from_template!(template, server_id)
    file = ConfigurationFile.new
    file.server_id = server_id
    file.file_path = template.file_path
    file.file_type = template.file_type
    file.namehash = SecureRandom.hex
    transaction do
      file.save!
      file.file_versions.create!(content: template.content)
    end
    file
  end

  def update_by_form(content, path)
    transaction do
      update_attribute(:file_path, path)
      file_versions.create!(content: content, number: last_version.number + 1)
    end
  end
  
  def update_by_api(file)
    file_versions.create!(content: file.read, number: last_version.number + 1)
  end

  def last_version
    file_versions.first
  end
end