require 'fileutils'
require 'optparse'
require 'action_dispatch'
require 'rails'

module Rails
  class Server < ::Rack::Server
    class Options
      def parse!(args)
        args, options = args.dup, {}

        option_parser(options).parse! args

        options[:log_stdout] = options[:daemonize].blank? && (options[:environment] || Rails.env) == "development"
        options[:server]     = args.shift
        options
      end

      private

      def option_parser(options)
        OptionParser.new do |opts|
          opts.banner = "Usage: rails server [Mongrel, Thin etc] [options]"
          opts.on("-p", "--port=port", Integer,
                  "Runs Rails on the specified port.", "Default: 3000") { |v| options[:Port] = v }
          opts.on("-b", "--binding=IP", String,
                  "Binds Rails to the specified IP.", "Default: 0.0.0.0") { |v| options[:Host] = v }
          opts.on("-c", "--config=file", String,
                  "Uses a custom rackup configuration.") { |v| options[:config] = v }
          opts.on("-d", "--daemon", "Runs server as a Daemon.") { options[:daemonize] = true }
          opts.on("-u", "--debugger", "Enables the debugger.") do
            if RUBY_VERSION < '2.0.0'
              options[:debugger] = true
            else
              puts "=> Notice: debugger option is ignored since Ruby 2.0 and " \
                   "it will be removed in future versions."
            end
          end
          opts.on("-e", "--environment=name", String,
                  "Specifies the environment to run this server under (test/development/production).",
                  "Default: development") { |v| options[:environment] = v }
          opts.on("-P", "--pid=pid", String,
                  "Specifies the PID file.",
                  "Default: tmp/pids/server.pid") { |v| options[:pid] = v }

          opts.separator ""

          opts.on("-h", "--help", "Shows this help message.") { puts opts; exit }
        end
      end
    end

    def initialize(*)
      super
      set_environment
    end

    # TODO: this is no longer required but we keep it for the moment to support older config.ru files.
    def app
      @app ||= begin
        app = super
        app.respond_to?(:to_app) ? app.to_app : app
      end
    end

    def opt_parser
      Options.new
    end

    def set_environment
      ENV["RAILS_ENV"] ||= options[:environment]
    end

    def start
      print_boot_information
      trap(:INT) { exit }
      create_tmp_directories
      log_to_stdout if options[:log_stdout]

      super
    ensure
      # The '-h' option calls exit before @options is set.
      # If we call 'options' with it unset, we get double help banners.
      puts 'Exiting' unless @options && options[:daemonize]
    end

    def middleware
      middlewares = []
      if RUBY_VERSION < '2.0.0'
        middlewares << [Rails::Rack::Debugger] if options[:debugger]
      end
      middlewares << [::Rack::ContentLength]

      # FIXME: add Rack::Lock in the case people are using webrick.
      # This is to remain backwards compatible for those who are
      # running webrick in production. We should consider removing this
      # in development.
      if server.name == 'Rack::Handler::WEBrick'
        middlewares << [::Rack::Lock]
      end

      Hash.new(middlewares)
    end

    def log_path
      "log/#{options[:environment]}.log"
    end

    def default_options
      super.merge({
        Port:               3000,
        DoNotReverseLookup: true,
        environment:        (ENV['RAILS_ENV'] || ENV['RACK_ENV'] || "development").dup,
        daemonize:          false,
        debugger:           false,
        pid:                File.expand_path("tmp/pids/server.pid"),
        config:             File.expand_path("config.ru")
      })
    end

    private

      def print_boot_information
        url = "#{options[:SSLEnable] ? 'https' : 'http'}://#{options[:Host]}:#{options[:Port]}"
        puts "=> Booting #{ActiveSupport::Inflector.demodulize(server)}"
        puts "=> Rails #{Rails.version} application starting in #{Rails.env} on #{url}"
        puts "=> Run `rails server -h` for more startup options"

        if options[:Host].to_s.match(/0\.0\.0\.0/)
          puts "=> Notice: server is listening on all interfaces (#{options[:Host]}). Consider using 127.0.0.1 (--binding option)"
        end

        puts "=> Ctrl-C to shutdown server" unless options[:daemonize]
      end

      def create_tmp_directories
        %w(cache pids sessions sockets).each do |dir_to_make|
          FileUtils.mkdir_p(File.join(Rails.root, 'tmp', dir_to_make))
        end
      end

      def log_to_stdout
        wrapped_app # touch the app so the logger is set up

        console = ActiveSupport::Logger.new($stdout)
        console.formatter = Rails.logger.formatter
        console.level = Rails.logger.level

        Rails.logger.extend(ActiveSupport::Logger.broadcast(console))
      end
  end
end