require 'erb'
PhusionPassenger.require_passenger_lib 'vendor/daemon_controller'
PhusionPassenger.require_passenger_lib 'platform_info/ruby'

class NginxController
  PlatformInfo = PhusionPassenger::PlatformInfo
  TEMPLATE_DIR = File.expand_path(File.dirname(__FILE__) + "/../stub/nginx")
  PORT = 64507

  def initialize(root_dir)
    root_dir     = File.expand_path(root_dir)
    @passenger_root = PhusionPassenger.install_spec
    @nginx_root  = root_dir
    @port        = PORT
    @config_file = "#{root_dir}/nginx.conf"
    @pid_file    = "#{root_dir}/nginx.pid"
    @log_file    = "#{root_dir}/error.log"
    @controller  = PhusionPassenger::DaemonController.new(
      :identifier    => 'Nginx',
      :start_command => "#{CONFIG['nginx']} -p #{root_dir} -c '#{@config_file}'",
      :ping_command  => [:tcp, '127.0.0.1', PORT],
      :pid_file      => @pid_file,
      :log_file      => @log_file,
      :timeout       => 25,
      :before_start  => method(:write_nginx_config_files)
    )

    @servers = []
    @max_pool_size = 1
  end

  def set(options)
    options.each_pair do |key, value|
      instance_variable_set("@#{key}", value)
    end
  end

  def start
    stop
    @controller.start
  end

  def stop
    @controller.stop
    # On OS X, the Nginx server socket may linger around for a while
    # after Nginx shutdown, despite Nginx setting SO_REUSEADDR.
    sockaddr = Socket.pack_sockaddr_in(PORT, '127.0.0.1')
    eventually(30) do
      !@controller.send(:ping_socket, Socket::Constants::AF_INET, sockaddr)
    end
  end

  def running?
    return @controller.running?
  end

  def port
    return @port
  end

  def add_server
    server = Server.new
    yield server
    @servers << server
  end

private
  class Server
    attr_accessor :values
    attr_accessor :extra

    def initialize
      @values = { :passenger_enabled => "on" }
    end

    def [](key)
      return @values[key]
    end

    def []=(key, value)
      @values[key] = value
    end

    def <<(text)
      @extra = text
    end
  end

  def write_nginx_config_files
    template = ERB.new(File.read("#{TEMPLATE_DIR}/nginx.conf.erb"))
    File.write(@config_file, template.result(get_binding))
  end

  def get_binding
    return binding
  end
end
