module ActiveMerchant #:nodoc:
  module Billing #:nodoc:
    class GlobalCollectGateway < Gateway
      self.display_name = 'GlobalCollect'
      self.homepage_url = 'http://www.globalcollect.com/'

      self.test_url = 'https://eu.sandbox.api-ingenico.com'
      self.live_url = 'https://api.globalcollect.com'

      self.supported_countries = ['AD', 'AE', 'AG', 'AI', 'AL', 'AM', 'AO', 'AR', 'AS', 'AT', 'AU', 'AW', 'AX', 'AZ', 'BA', 'BB', 'BD', 'BE', 'BF', 'BG', 'BH', 'BI', 'BJ', 'BL', 'BM', 'BN', 'BO', 'BQ', 'BR', 'BS', 'BT', 'BW', 'BY', 'BZ', 'CA', 'CC', 'CD', 'CF', 'CH', 'CI', 'CK', 'CL', 'CM', 'CN', 'CO', 'CR', 'CU', 'CV', 'CW', 'CX', 'CY', 'CZ', 'DE', 'DJ', 'DK', 'DM', 'DO', 'DZ', 'EC', 'EE', 'EG', 'ER', 'ES', 'ET', 'FI', 'FJ', 'FK', 'FM', 'FO', 'FR', 'GA', 'GB', 'GD', 'GE', 'GF', 'GH', 'GI', 'GL', 'GM', 'GN', 'GP', 'GQ', 'GR', 'GS', 'GT', 'GU', 'GW', 'GY', 'HK', 'HN', 'HR', 'HT', 'HU', 'ID', 'IE', 'IL', 'IM', 'IN', 'IS', 'IT', 'JM', 'JO', 'JP', 'KE', 'KG', 'KH', 'KI', 'KM', 'KN', 'KR', 'KW', 'KY', 'KZ', 'LA', 'LB', 'LC', 'LI', 'LK', 'LR', 'LS', 'LT', 'LU', 'LV', 'MA', 'MC', 'MD', 'ME', 'MF', 'MG', 'MH', 'MK', 'MM', 'MN', 'MO', 'MP', 'MQ', 'MR', 'MS', 'MT', 'MU', 'MV', 'MW', 'MX', 'MY', 'MZ', 'NA', 'NC', 'NE', 'NG', 'NI', 'NL', 'NO', 'NP', 'NR', 'NU', 'NZ', 'OM', 'PA', 'PE', 'PF', 'PG', 'PH', 'PL', 'PN', 'PS', 'PT', 'PW', 'QA', 'RE', 'RO', 'RS', 'RU', 'RW', 'SA', 'SB', 'SC', 'SE', 'SG', 'SH', 'SI', 'SJ', 'SK', 'SL', 'SM', 'SN', 'SR', 'ST', 'SV', 'SZ', 'TC', 'TD', 'TG', 'TH', 'TJ', 'TL', 'TM', 'TN', 'TO', 'TR', 'TT', 'TV', 'TW', 'TZ', 'UA', 'UG', 'US', 'UY', 'UZ', 'VC', 'VE', 'VG', 'VI', 'VN', 'WF', 'WS', 'ZA', 'ZM', 'ZW']
      self.default_currency = 'USD'
      self.money_format = :cents
      self.supported_cardtypes = [:visa, :master, :american_express, :discover]

      def initialize(options={})
        requires!(options, :merchant_id, :api_key_id, :secret_api_key)
        super
      end

      def purchase(money, payment, options={})
        MultiResponse.run do |r|
          r.process { authorize(money, payment, options) }
          r.process { capture(money, r.authorization, options) } unless capture_requested?(r)
        end
      end

      def authorize(money, payment, options={})
        post = nestable_hash
        add_order(post, money, options)
        add_payment(post, payment, options)
        add_customer_data(post, options, payment)
        add_address(post, payment, options)
        add_creator_info(post, options)
        add_fraud_fields(post, options)

        commit(:authorize, post)
      end

      def capture(money, authorization, options={})
        post = nestable_hash
        add_order(post, money, options, capture: true)
        add_customer_data(post, options)
        add_creator_info(post, options)
        commit(:capture, post, authorization)
      end

      def refund(money, authorization, options={})
        post = nestable_hash
        add_amount(post, money, options)
        add_refund_customer_data(post, options)
        add_creator_info(post, options)
        commit(:refund, post, authorization)
      end

      def void(authorization, options={})
        post = nestable_hash
        add_creator_info(post, options)
        commit(:void, post, authorization)
      end

      def verify(payment, options={})
        MultiResponse.run(:use_first_response) do |r|
          r.process { authorize(100, payment, options) }
          r.process { void(r.authorization, options) }
        end
      end

      def supports_scrubbing?
        true
      end

      def scrub(transcript)
        transcript.
          gsub(%r((Authorization: )[^\\]*)i, '\1[FILTERED]').
          gsub(%r(("cardNumber\\+":\\+")\d+), '\1[FILTERED]').
          gsub(%r(("cvv\\+":\\+")\d+), '\1[FILTERED]')
      end

      private

      BRAND_MAP = {
        'visa' => '1',
        'american_express' => '2',
        'master' => '3',
        'discover' => '128',
        'jcb' => '125',
        'diners_club' => '132'
      }

      def add_order(post, money, options, capture: false)
        if capture
          post['amount'] = amount(money)
        else
          add_amount(post['order'], money, options)
        end
        post['order']['references'] = {
          'merchantReference' => options[:order_id],
          'descriptor' => options[:description] # Max 256 chars
        }
        post['order']['references']['invoiceData'] = {
          'invoiceNumber' => options[:invoice]
        }
      end

      def add_creator_info(post, options)
        post['sdkIdentifier'] = options[:sdk_identifier] if options[:sdk_identifier]
        post['sdkCreator'] = options[:sdk_creator] if options[:sdk_creator]
        post['integrator'] = options[:integrator] if options[:integrator]
        post['shoppingCartExtension'] = {}
        post['shoppingCartExtension']['creator'] = options[:creator] if options[:creator]
        post['shoppingCartExtension']['name'] = options[:name] if options[:name]
        post['shoppingCartExtension']['version'] = options[:version] if options[:version]
        post['shoppingCartExtension']['extensionID'] = options[:extension_ID] if options[:extension_ID]
      end

      def add_amount(post, money, options={})
        post['amountOfMoney'] = {
          'amount' => amount(money),
          'currencyCode' => options[:currency] || currency(money)
        }
      end

      def add_payment(post, payment, options)
        year  = format(payment.year, :two_digits)
        month = format(payment.month, :two_digits)
        expirydate =   "#{month}#{year}"
        pre_authorization = options[:pre_authorization] ? 'PRE_AUTHORIZATION' : 'FINAL_AUTHORIZATION'

        post['cardPaymentMethodSpecificInput'] = {
            'paymentProductId' => BRAND_MAP[payment.brand],
            'skipAuthentication' => 'true', # refers to 3DSecure
            'skipFraudService' => 'true',
            'authorizationMode' => pre_authorization
        }
        post['cardPaymentMethodSpecificInput']['card'] = {
            'cvv' => payment.verification_value,
            'cardNumber' => payment.number,
            'expiryDate' => expirydate,
            'cardholderName' => payment.name
        }
      end

      def add_customer_data(post, options, payment = nil)
        if payment
          post['order']['customer']['personalInformation'] = {
            'name' => {
              'firstName' => payment.first_name[0..14],
              'surname' => payment.last_name[0..69]
            }
          }
        end
        post['order']['customer']['merchantCustomerId'] = options[:customer] if options[:customer]
        post['order']['customer']['companyInformation']['name'] = options[:company] if options[:company]
        post['order']['customer']['contactDetails']['emailAddress'] = options[:email] if options[:email]
        if address = options[:billing_address] || options[:address]
          post['order']['customer']['contactDetails']['phoneNumber'] = address[:phone] if address[:phone]
        end
      end

      def add_refund_customer_data(post, options)
        if address = options[:billing_address] || options[:address]
          post['customer']['address'] = {
            'countryCode' => address[:country]
          }
          post['customer']['contactDetails']['emailAddress'] = options[:email] if options[:email]
          if address = options[:billing_address] || options[:address]
            post['customer']['contactDetails']['phoneNumber'] = address[:phone] if address[:phone]
          end
        end
      end

      def add_address(post, creditcard, options)
        billing_address = options[:billing_address] || options[:address]
        shipping_address = options[:shipping_address]
        if billing_address = options[:billing_address] || options[:address]
          post['order']['customer']['billingAddress'] = {
            'street' => billing_address[:address1],
            'additionalInfo' => billing_address[:address2],
            'zip' => billing_address[:zip],
            'city' => billing_address[:city],
            'state' => billing_address[:state],
            'countryCode' => billing_address[:country]
          }
        end
        if shipping_address
          post['order']['customer']['shippingAddress'] = {
            'street' => shipping_address[:address1],
            'additionalInfo' => shipping_address[:address2],
            'zip' => shipping_address[:zip],
            'city' => shipping_address[:city],
            'state' => shipping_address[:state],
            'countryCode' => shipping_address[:country]
          }
          post['order']['customer']['shippingAddress']['name'] = {
            'firstName' => shipping_address[:firstname],
            'surname' => shipping_address[:lastname]
          }
        end
      end

      def add_fraud_fields(post, options)
        fraud_fields = {}
        fraud_fields.merge!(options[:fraud_fields]) if options[:fraud_fields]
        fraud_fields.merge!({customerIpAddress: options[:ip]}) if options[:ip]

        post['fraudFields'] = fraud_fields unless fraud_fields.empty?
      end

      def parse(body)
        JSON.parse(body)
      end

      def url(action, authorization)
        (test? ? test_url : live_url) + uri(action, authorization)
      end

      def uri(action, authorization)
        uri = "/v1/#{@options[:merchant_id]}/"
        case action
        when :authorize
          uri + 'payments'
        when :capture
          uri + "payments/#{authorization}/approve"
        when :refund
          uri + "payments/#{authorization}/refund"
        when :void
          uri + "payments/#{authorization}/cancel"
        end
      end

      def commit(action, post, authorization = nil)
        begin
          raw_response = ssl_post(url(action, authorization), post.to_json, headers(action, post, authorization))
          response = parse(raw_response)
        rescue ResponseError => e
          if e.response.code.to_i >= 400
            response = parse(e.response.body)
          end
        rescue JSON::ParserError
          response = json_error(raw_response)
        end

        succeeded = success_from(response)
        Response.new(
          succeeded,
          message_from(succeeded, response),
          response,
          authorization: authorization_from(succeeded, response),
          error_code: error_code_from(succeeded, response),
          test: test?
        )
      end

      def json_error(raw_response)
        {
          'error_message' => 'Invalid response received from the Ingenico ePayments (formerly GlobalCollect) API.  Please contact Ingenico ePayments if you continue to receive this message.' \
            "  (The raw response returned by the API was #{raw_response.inspect})",
          'status' => 'REJECTED'
        }
      end

      def headers(action, post, authorization = nil)
        {
          'Content-Type'  => content_type,
          'Authorization' => auth_digest(action, post, authorization),
          'Date' => date
        }
      end

      def auth_digest(action, post, authorization = nil)
        data = <<-EOS
POST
#{content_type}
#{date}
#{uri(action, authorization)}
EOS
        digest = OpenSSL::Digest.new('sha256')
        key = @options[:secret_api_key]
        "GCS v1HMAC:#{@options[:api_key_id]}:#{Base64.strict_encode64(OpenSSL::HMAC.digest(digest, key, data))}"
      end

      def date
        @date ||= Time.now.strftime('%a, %d %b %Y %H:%M:%S %Z') # Must be same in digest and HTTP header
      end

      def content_type
        'application/json'
      end

      def success_from(response)
        !response['errorId'] && response['status'] != 'REJECTED'
      end

      def message_from(succeeded, response)
        if succeeded
          'Succeeded'
        else
          if errors = response['errors']
            errors.first.try(:[], 'message')
          elsif response['error_message']
            response['error_message']
          elsif response['status']
            'Status: ' + response['status']
          else
            'No message available'
          end
        end
      end

      def authorization_from(succeeded, response)
        if succeeded
          response['id'] || response['payment']['id'] || response['paymentResult']['payment']['id']
        elsif response['errorId']
          response['errorId']
        else
          'GATEWAY ERROR'
        end
      end

      def error_code_from(succeeded, response)
        unless succeeded
          if errors = response['errors']
            errors.first.try(:[], 'code')
          elsif status = response.try(:[], 'statusOutput').try(:[], 'statusCode')
            status.to_s
          else
            'No error code available'
          end
        end
      end

      def nestable_hash
        Hash.new {|h,k| h[k] = Hash.new(&h.default_proc) }
      end

      def capture_requested?(response)
        response.params.try(:[], 'payment').try(:[], 'status') == 'CAPTURE_REQUESTED'
      end
    end
  end
end