class Jars::MavenSettings

def cleanup
  File.unlink(effective_settings) if effective_settings != settings
ensure
  reset
end

def effective_settings
  @_jars_effective_maven_settings_ = nil unless instance_variable_defined?(:@_jars_effective_maven_settings_)
  if @_jars_effective_maven_settings_.nil?
    begin
      require 'rubygems/request'
      http = Gem::Request.proxy_uri(Gem.configuration[:http_proxy] || Gem::Request.get_proxy_from_env('http'))
      https = Gem::Request.proxy_uri(Gem.configuration[:https_proxy] || Gem::Request.get_proxy_from_env('https'))
    rescue
      Jars.debug('ignore rubygems proxy configuration as rubygems is too old')
    end
    @_jars_effective_maven_settings_ = if http.nil? && https.nil?
                                         settings
                                       else
                                         setup_interpolated_settings(http, https) || settings
                                       end
  end
  @_jars_effective_maven_settings_
end

def global_settings
  @_jars_maven_global_settings_ = nil unless instance_variable_defined?(:@_jars_maven_global_settings_)
  if @_jars_maven_global_settings_.nil?
    if (mvn_home = ENV['M2_HOME'] || ENV['MAVEN_HOME'])
      settings = File.join(mvn_home, 'conf/settings.xml')
      settings = false unless File.exist?(settings)
    else
      settings = false
    end
    @_jars_maven_global_settings_ = settings
  end
  @_jars_maven_global_settings_ || nil
end

def local_settings
  @_jars_maven_local_settings_ = nil unless instance_variable_defined?(:@_jars_maven_local_settings_)
  if @_jars_maven_local_settings_.nil?
    settings = Jars.absolute('settings.xml')
    @_jars_maven_local_settings_ =
      if settings && File.exist?(settings)
        settings
      else
        false
      end
  end
  @_jars_maven_local_settings_ || nil
end

def raw_proxy_settings_xml(http, https)
  raw = File.read(File.join(File.dirname(__FILE__), 'settings.xml'))
  if http
    raw.sub!('__HTTP_ACTIVE__', 'true')
    raw.sub!('__HTTP_SERVER__', http.host)
    raw.sub!('__HTTP_PORT__', http.port.to_s)
  else
    raw.sub!('__HTTP_ACTIVE__', 'false')
  end
  if https
    raw.sub!('__HTTPS_ACTIVE__', 'true')
    raw.sub!('__HTTPS_SERVER__', https.host)
    raw.sub!('__HTTPS_PORT__', https.port.to_s)
  else
    raw.sub!('__HTTPS_ACTIVE__', 'false')
  end
  raw
end

def reset
  instance_variables.each { |var| instance_variable_set(var, nil) }
end

def settings
  @_jars_maven_settings_ = nil unless instance_variable_defined?(:@_jars_maven_settings_)
  local_settings || user_settings if @_jars_maven_settings_.nil?
end

def setup_interpolated_settings(http, https)
  proxy = raw_proxy_settings_xml(http, https).gsub("\n", LINE_SEPARATOR)
  if settings.nil?
    raw = "<settings>#{LINE_SEPARATOR}#{proxy}</settings>"
  else
    raw = File.read(settings)
    if raw.include?('<proxy>')
      Jars.warn("can not interpolated proxy info for #{settings}")
      return
    else
      raw.sub!('<settings>', "<settings>#{LINE_SEPARATOR}#{proxy}")
    end
  end
  tempfile = java.io.File.create_temp_file('settings', '.xml')
  tempfile.delete_on_exit
  File.write(tempfile.path, raw)
  tempfile.path
end

def user_settings
  @_jars_maven_user_settings_ = nil unless instance_variable_defined?(:@_jars_maven_user_settings_)
  if @_jars_maven_user_settings_.nil?
    if (settings = Jars.absolute(Jars.to_prop(MAVEN_SETTINGS)))
      unless File.exist?(settings)
        Jars.warn { "configured ENV['#{MAVEN_SETTINGS}'] = '#{settings}' not found" }
        settings = false
      end
    else # use maven default (user) settings
      settings = File.join(Jars.user_home, '.m2', 'settings.xml')
      settings = false unless File.exist?(settings)
    end
    @_jars_maven_user_settings_ = settings
  end
  @_jars_maven_user_settings_ || nil
end