class KPM::TomcatManager

def default_java_properties
  <<HEREDOC.gsub(/\s+/, ' ').strip
  -server
  -showversion
  -XX:+PrintCommandLineFlags
  -XX:+UseCodeCacheFlushing
  -XX:PermSize=512m
  -XX:MaxPermSize=1G
  -Xms1G
  -Xmx2G
  -XX:+CMSClassUnloadingEnabled
  -XX:-OmitStackTraceInFastThrow
  -XX:+UseParNewGC
  -XX:+UseConcMarkSweepGC
  -XX:+CMSConcurrentMTEnabled
  -XX:+CMSParallelRemarkEnabled
  -XX:+UseCMSInitiatingOccupancyOnly
  -XX:CMSInitiatingOccupancyFraction=70
  -XX:+ScavengeBeforeFullGC
  -XX:+CMSScavengeBeforeRemark
  -XX:NewSize=600m
  -XX:MaxNewSize=900m
  -XX:SurvivorRatio=10
  -XX:+DisableExplicitGC
  -Djava.security.egd=file:/dev/./urandom
DOC
end

def download
  uri = URI.parse(DOWNLOAD_URL)
  path = nil
  Dir.mktmpdir do |dir|
    file = Pathname.new(dir).join('tomcat.tar.gz')
    @logger.info "Starting download of #{DOWNLOAD_URL} to #{file}"
    Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == 'https') do |http|
      File.open(file, 'wb+') do |f|
        http.get(uri.path) do |body|
          f.write(body)
        end
      end
    end
    path = Utils.unpack_tgz(file.to_s, @tomcat_dir, true)
  end
  @logger.info "Successful installation of #{DOWNLOAD_URL} to #{path}"
  path
end

def help
  "Tomcat installed at #{@tomcat_dir}
t script: #{@tomcat_dir.join('bin').join('startup.sh')}
 script: #{@tomcat_dir.join('bin').join('shutdown.sh')}
: #{@tomcat_dir.join('logs')}"
end

def initialize(tomcat_dir, logger)
  @tomcat_dir = Pathname.new(tomcat_dir)
  @logger = logger
end

def setup
  # Remove default webapps
  %w[ROOT docs examples host-manager manager].each do |webapp|
    FileUtils.rm_rf(@tomcat_dir.join('webapps').join(webapp))
  end
  # Update Root.xml
  root_xml_dir = @tomcat_dir.join('conf').join('Catalina').join('localhost')
  FileUtils.mkdir_p(root_xml_dir)
  File.write(root_xml_dir.join('ROOT.xml'), '<Context></Context>')
  # Setup default properties
  setenv_sh_path = @tomcat_dir.join('bin').join('setenv.sh')
  File.write(setenv_sh_path, "export CATALINA_OPTS=\"$CATALINA_OPTS #{default_java_properties}\"")
  @tomcat_dir.join('webapps').join('ROOT.war').to_s
end