class KPM::Installer

def self.from_file(config_path, logger=nil)
  Installer.new(YAML::load_file(config_path), logger)
end

def initialize(raw_config, logger=nil)
  raise(ArgumentError, 'killbill or kaui section must be specified') if raw_config['killbill'].nil? and raw_config['kaui'].nil?
  @config = raw_config['killbill']
  @kaui_config = raw_config['kaui']
  if logger.nil?
    @logger = Logger.new(STDOUT)
    @logger.level = Logger::INFO
  else
    @logger = logger
  end
end

def install
  unless @config.nil?
    install_killbill_server
    install_plugins
    install_default_bundles
  end
  unless @kaui_config.nil?
    install_kaui
  end
end

def install_default_bundles
  return if @config['default_bundles'] == false
  group_id = 'org.kill-bill.billing'
  artifact_id = 'killbill-osgi-bundles-defaultbundles'
  packaging = 'tar.gz'
  version = @config['version'] || LATEST_VERSION
  destination = "#{@config['plugins_dir']}/platform"
  FileUtils.mkdir_p(destination)
  @logger.info "Installing Kill Bill #{artifact_id} #{version} to #{destination}"
  archive = BaseArtifact.pull(group_id, artifact_id, packaging, version, destination, @config['nexus'], @config['nexus']['ssl_verify'])
  Utils.unpack_tgz(archive[:file_path], destination)
  FileUtils.rm archive[:file_path]
  # The special JRuby bundle needs to be called jruby.jar
  File.rename Dir.glob("#{destination}/killbill-osgi-bundles-jruby-*.jar").first, "#{destination}/jruby.jar"
end

def install_java_plugins(bundles_dir)
  return if @config['plugins'].nil? or @config['plugins']['java'].nil?
  @config['plugins']['java'].each do |plugin|
    artifact_id = plugin['name']
    version = plugin['version'] || LATEST_VERSION
    destination = "#{bundles_dir}/plugins/java/#{artifact_id}/#{version}"
    FileUtils.mkdir_p(destination)
    @logger.info "Installing Kill Bill Java plugin #{artifact_id} #{version} to #{destination}"
    KillbillPluginArtifact.pull(artifact_id, version, :java, destination, @config['nexus'], @config['nexus']['ssl_verify'])
  end
end

def install_kaui
  version = @kaui_config['version'] || LATEST_VERSION
  webapp_path = @kaui_config['webapp_path'] || KPM::root
  webapp_dir = File.dirname(webapp_path)
  FileUtils.mkdir_p(webapp_dir)
  @logger.info "Installing Kaui #{version} to #{webapp_path}"
  file = KauiArtifact.pull(version, webapp_dir, @kaui_config['nexus'], @kaui_config['nexus']['ssl_verify'])
  FileUtils.mv file[:file_path], webapp_path
end

def install_killbill_server
  group_id = @config['group_id'] || BaseArtifact::KILLBILL_GROUP_ID
  artifact_id = @config['artifact_id'] || KillbillServerArtifact::KILLBILL_ARTIFACT_ID
  packaging = @config['packaging'] || KillbillServerArtifact::KILLBILL_PACKAGING
  classifier = @config['classifier'] || KillbillServerArtifact::KILLBILL_CLASSIFIER
  version = @config['version'] || LATEST_VERSION
  webapp_path = @config['webapp_path'] || KPM::root
  webapp_dir = File.dirname(webapp_path)
  FileUtils.mkdir_p(webapp_dir)
  @logger.info "Installing Kill Bill server (#{group_id}:#{artifact_id}:#{packaging}:#{classifier}:#{version}) to #{webapp_path}"
  file = KillbillServerArtifact.pull(group_id, artifact_id, packaging, classifier, version, webapp_dir, @config['nexus'], @config['nexus']['ssl_verify'])
  FileUtils.mv file[:file_path], webapp_path
end

def install_plugins
  bundles_dir = @config['plugins_dir']
  install_java_plugins(bundles_dir)
  install_ruby_plugins(bundles_dir)
end

def install_ruby_plugins(bundles_dir)
  return if @config['plugins'].nil? or @config['plugins']['ruby'].nil?
  @config['plugins']['ruby'].each do |plugin|
    artifact_id = plugin['name']
    version = plugin['version'] || LATEST_VERSION
    destination = "#{bundles_dir}/plugins/ruby"
    FileUtils.mkdir_p(destination)
    @logger.info "Installing Kill Bill Ruby plugin #{artifact_id} #{version} to #{destination}"
    archive = KillbillPluginArtifact.pull(artifact_id, version, :ruby, destination, @config['nexus'], @config['nexus']['ssl_verify'])
    Utils.unpack_tgz(archive[:file_path], destination, true)
    FileUtils.rm archive[:file_path]
  end
end