require 'rubygems'
require 'active_support'
require 'active_merchant'

class GatewaySupport # :nodoc:
  ACTIONS = %i[purchase authorize capture void credit recurring]

  include ActiveMerchant::Billing

  attr_reader :gateways

  def initialize
    Dir[File.expand_path(File.dirname(__FILE__) + '/../active_merchant/billing/gateways/*.rb')].each do |f|
      filename = File.basename(f, '.rb')
      gateway_name = filename + '_gateway'
      begin
        ('ActiveMerchant::Billing::' + gateway_name.camelize).constantize
      rescue NameError
        puts 'Could not load gateway ' + gateway_name.camelize + ' from ' + f + '.'
      end
    end
    @gateways = Gateway.implementations.sort_by(&:name)
    @gateways.delete(ActiveMerchant::Billing::BogusGateway)
  end

  def each_gateway(&block)
    @gateways.each(&block)
  end

  def features
    width = 15

    print 'Name'.center(width + 20)
    ACTIONS.each { |f| print f.to_s.capitalize.center(width) }
    puts

    each_gateway do |g|
      print g.display_name.ljust(width + 20)
      ACTIONS.each do |f|
        print((g.instance_methods.include?(f.to_s) ? 'Y' : 'N').center(width))
      end
      puts
    end
  end

  def to_rdoc
    each_gateway do |g|
      puts "* {#{g.display_name}}[#{g.homepage_url}] - #{g.supported_countries.join(', ')}"
    end
  end

  def to_textile
    each_gateway do |g|
      puts %/ * "#{g.display_name}":#{g.homepage_url} [#{g.supported_countries.join(', ')}]/
    end
  end

  def to_markdown
    each_gateway do |g|
      puts %/* [#{g.display_name}](#{g.homepage_url}) - #{g.supported_countries.join(', ')}/
    end
  end

  def to_s
    each_gateway do |g|
      puts "#{g.display_name} - #{g.homepage_url} [#{g.supported_countries.join(', ')}]"
    end
  end
end
