require 'rubygems'
require 'yaml'
require 'mongrel'
require 'mongrel/rails'


class Version < GemPlugin::Plugin "/commands"
  include Mongrel::Command::Base

  def run
    puts "Version #{Mongrel::Const::MONGREL_VERSION}"
  end

end


class Start < GemPlugin::Plugin "/commands"
  include Mongrel::Command::Base

  def configure
    options [
      ["-e", "--environment ENV", "Rails environment to run as", :@environment, ENV['RAILS_ENV'] || "development"],
      ["-d", "--daemonize", "Whether to run in the background or not", :@daemon, false],
      ['-p', '--port PORT', "Which port to bind to", :@port, 3000],
      ['-a', '--address ADDR', "Address to bind to", :@address, "0.0.0.0"],
      ['-l', '--log FILE', "Where to write log messages", :@log_file, "log/mongrel.log"],
      ['-P', '--pid FILE', "Where to write the PID", :@pid_file, "log/mongrel.pid"],
      ['-n', '--num-procs INT', "Number of processors active before clients denied", :@num_procs, 1024],
      ['-t', '--timeout TIME', "Timeout all requests after 100th seconds time", :@timeout, 0],
      ['-m', '--mime PATH', "A YAML file that lists additional MIME types", :@mime_map, nil],
      ['-c', '--chdir PATH', "Change to dir before starting (will be expanded)", :@cwd, Dir.pwd],
      ['-r', '--root PATH', "Set the document root (default 'public')", :@docroot, "public"],
      ['-B', '--debug', "Enable debugging mode", :@debug, false],
      ['-C', '--config PATH', "Use a config file", :@config_file, nil],
      ['-S', '--script PATH', "Load the given file as an extra config script.", :@config_script, nil],
      ['-G', '--generate CONFIG', "Generate a config file for -C", :@generate, nil]
    ]
  end
  
  def validate
    @cwd = File.expand_path(@cwd)
    valid_dir? @cwd, "Invalid path to change to during daemon mode: #@cwd"

    # change there to start, then we'll have to come back after daemonize
    Dir.chdir(@cwd)

    valid_dir? File.dirname(@log_file), "Path to log file not valid: #@log_file"
    valid_dir? File.dirname(@pid_file), "Path to pid file not valid: #@pid_file"
    valid_dir? @docroot, "Path to docroot not valid: #@docroot"
    valid_exists? @mime_map, "MIME mapping file does not exist: #@mime_map" if @mime_map
    valid_exists? @config_file, "Config file not there: #@config_file" if @config_file
    valid_dir? File.dirname(@generate), "Problem accessing directory to #@generate" if @generate
    return @valid
  end

  def run

    # command line setting override config file settings
    settings = { :host => @address,  :port => @port, :cwd => @cwd,
      :log_file => @log_file, :pid_file => @pid_file, :environment => @environment,
      :docroot => @docroot, :mime_map => @mime_map, :daemon => @daemon,
      :debug => @debug, :includes => ["mongrel"], :config_script => @config_script,
      :num_processors => @num_procs, :timeout => @timeout
    }

    if @generate
      STDERR.puts "** Writing config to #@generate"
      open(@generate, "w") {|f| f.write(settings.to_yaml) }
    end

    if @config_file
      STDERR.puts "** Loading settings from #{@config_file} (command line options override)."
      conf = YAML.load_file(@config_file)
      settings = conf.merge(settings)
    end
    
    config = Mongrel::Rails::RailsConfigurator.new(settings) do
      log "Starting Mongrel in #{defaults[:environment]} mode at #{defaults[:host]}:#{defaults[:port]}"
      
      if defaults[:daemon]
        log "Daemonizing, any open files are closed.  Look at #{defaults[:pid_file]} and #{defaults[:log_file]} for info."
        daemonize
      end
      
      listener do
        mime = {}
        if defaults[:mime_map]
          log "Loading additional MIME types from #{defaults[:mime_map]}"
          mime = load_mime_map(defaults[:mime_map], mime)
        end
        
        if defaults[:debug]
          log "Installing debugging prefixed filters.  Look in log/mongrel_debug for the files."
          debug "/"
        end

        log "Starting Rails in environment #{defaults[:environment]} ..."
        uri "/", :handler => rails(:mime => mime)
        log "Rails loaded."

        log "Loading any Rails specific GemPlugins"
        load_plugins

        if defaults[:config_script]
          log "Loading #{defaults[:config_script]} external config script"
          run_config(defaults[:config_script])
        end

        setup_rails_signals
      end
    end

    config.run
    config.log "Mongrel available at #{settings[:host]}:#{settings[:port]}"
    config.join

    if config.needs_restart
      if RUBY_PLATFORM !~ /mswin/
        cmd = "ruby #{__FILE__} start #{original_args.join(' ')}"
        config.log "Restarting with arguments:  #{cmd}"
        exec cmd
      else
        config.log "Win32 does not support restarts. Exiting."
      end
    end
  end
end

def send_signal(signal, pid_file)
  pid = open(pid_file).read.to_i
  print "Sending #{signal} to Mongrel at PID #{pid}..."
  begin
    Process.kill(signal, pid)
  rescue Errno::ESRCH
    puts "Process does not exist.  Not running."
  end
  
  puts "Done."
end


class Stop < GemPlugin::Plugin "/commands"
  include Mongrel::Command::Base

  def configure 
    options [ 
             ['-c', '--chdir PATH', "Change to dir before starting (will be expanded)", :@cwd, Dir.pwd],
             ['-f', '--force', "Force the shutdown.", :@force, false],
             ['-P', '--pid FILE', "Where to write the PID", :@pid_file, "log/mongrel.pid"]
    ]
  end
  
  def validate
    @cwd = File.expand_path(@cwd)
    valid_dir? @cwd, "Invalid path to change to during daemon mode: #@cwd"

    @pid_file = File.join(@cwd,@pid_file)
    valid_exists? @pid_file, "PID file #@pid_file does not exist. Not running?" 

    return @valid
  end

  
  def run
    if @force
      send_signal("KILL", @pid_file)
    else
      send_signal("TERM", @pid_file)
    end
  end
end



class Restart < GemPlugin::Plugin "/commands"
  include Mongrel::Command::Base

  def configure 
    options [ 
             ['-c', '--chdir PATH', "Change to dir before starting (will be expanded)", :@cwd, Dir.pwd],
             ['-s', '--soft', "Do a soft restart rather than a process exit restart", :@soft, false],
             ['-P', '--pid FILE', "Where to write the PID", :@pid_file, "log/mongrel.pid"]
    ]
  end
  
  def validate
    @cwd = File.expand_path(@cwd)
    valid_dir? @cwd, "Invalid path to change to during daemon mode: #@cwd"

    @pid_file = File.join(@cwd,@pid_file)
    valid_exists? @pid_file, "PID file #@pid_file does not exist. Not running?" 

    return @valid
  end


  def run
    if @soft
      send_signal("HUP", @pid_file)
    else
      send_signal("USR2", @pid_file)
    end
  end
end


GemPlugin::Manager.instance.load "mongrel" => GemPlugin::INCLUDE, "rails" => GemPlugin::EXCLUDE


if not Mongrel::Command::Registry.instance.run ARGV
   exit 1
end