require 'erratum'
require 'erratum/delete'
require 'erratum/reject'
require 'erratum/replace'
require 'erratum/simplify'
require 'erratum/transform'
require 'erratum/truncate'

class Errata
  attr_reader :klass
  
  def initialize(options = {})
    @klass = options[:klass]
    @_table = RemoteTable.new(:url => options[:url])
  end
  
  def rejects?(row)
    rejections.any? { |erratum| erratum.targets?(row) }
  end
  
  def correct!(row)
    corrections.each { |erratum| erratum.correct!(row) }
    nil
  end
  
  def implied_matching_methods
    (rejections + corrections).map { |erratum| erratum.matching_method }.compact.uniq
  end
  
  private
  
  def rejections
    @_rejections ||= @_table.rows.map { |erratum| ::Errata::Erratum::Reject.new(self, erratum) if erratum[:action] == 'reject' }.compact
  end
  
  def corrections
    @_corrections ||= @_table.rows.map { |erratum| "::Errata::Erratum::#{erratum[:action].camelcase}".constantize.new(self, erratum) if %w{delete replace simplify transform truncate}.include?(erratum[:action]) }.compact
  end
end