class UserAgent
  module Browsers
    module Webkit
      def self.extend?(agent)
        agent.detect { |useragent| useragent.product == 'AppleWebKit' }
      end

      def webkit?
        true
      end

      def browser
        if os =~ /Android/
          'Android'
        elsif detect_product('Chrome')
          'Chrome'
        elsif platform == 'webOS' || platform == 'BlackBerry'  || platform == 'Symbian'
          platform
        else
          'Safari'
        end
      end

      def build
        webkit.version
      end

      BuildVersions = {
        "85.7"     => "1.0",
        "85.8.5"   => "1.0.3",
        "85.8.2"   => "1.0.3",
        "124"      => "1.2",
        "125.2"    => "1.2.2",
        "125.4"    => "1.2.3",
        "125.5.5"  => "1.2.4",
        "125.5.6"  => "1.2.4",
        "125.5.7"  => "1.2.4",
        "312.1.1"  => "1.3",
        "312.1"    => "1.3",
        "312.5"    => "1.3.1",
        "312.5.1"  => "1.3.1",
        "312.5.2"  => "1.3.1",
        "312.8"    => "1.3.2",
        "312.8.1"  => "1.3.2",
        "412"      => "2.0",
        "412.6"    => "2.0",
        "412.6.2"  => "2.0",
        "412.7"    => "2.0.1",
        "416.11"   => "2.0.2",
        "416.12"   => "2.0.2",
        "417.9"    => "2.0.3",
        "418"      => "2.0.3",
        "418.8"    => "2.0.4",
        "418.9"    => "2.0.4",
        "418.9.1"  => "2.0.4",
        "419"      => "2.0.4",
        "425.13"   => "2.2",
        "534.52.7" => "5.1.2"
      }.freeze

      # Prior to Safari 3, the user agent did not include a version number
      def version
        str = if os =~ /CPU (?:iPhone |iPod )?OS ([\d_]+) like Mac OS X/
          $1.gsub(/_/, '.')
        elsif product = detect_product('Version')
          product.version
        elsif browser == 'Chrome'
          chrome.version
        else
          BuildVersions[build.to_s]
        end

        Version.new(str) if str
      end

      def application
         self.reject { |agent| agent.comment.nil? || agent.comment.empty? }.first
      end

      def platform
        if application.nil?
          nil
        elsif application.comment[0] =~ /Symbian/
        'Symbian'
        elsif application.comment[0] =~ /webOS/
          'webOS'
        else
          application.comment[0]
        end
      end

      def webkit
        detect { |useragent| useragent.product == "AppleWebKit" }
      end

      def security
        Security[application.comment[1]]
      end

      def os
        if platform == 'webOS'
          "Palm #{last.product} #{last.version}"
        elsif platform == 'Symbian'
          application.comment[0]
        elsif application
        application.comment[2].nil? ? OperatingSystems.normalize_os(application.comment[1]) :  OperatingSystems.normalize_os(application.comment[2]) 
        else
          nil
        end
      end

      def localization
        if application.nil?
          nil
        elsif platform == 'webOS'
          application.comment[2]
        else
          application.comment[3]
        end
      end
    end
  end
end