require 'formula'

class Rabbitmq < Formula
  homepage 'http://www.rabbitmq.com'
  url 'http://www.rabbitmq.com/releases/rabbitmq-server/v3.0.1/rabbitmq-server-generic-unix-3.0.1.tar.gz'
  sha1 '6256a589eea964adc7e051945818cb1b63ededc7'

  depends_on 'erlang'
  depends_on 'simplejson' => :python if MacOS.version == :leopard

  def install
    # Install the base files
    prefix.install Dir['*']

    # Setup the lib files
    (var+'lib/rabbitmq').mkpath
    (var+'log/rabbitmq').mkpath

    # Replace the SYS_PREFIX for things like rabbitmq-plugins
    inreplace (sbin + 'rabbitmq-defaults'), 'SYS_PREFIX=${RABBITMQ_HOME}', "SYS_PREFIX=#{HOMEBREW_PREFIX}"

    # Set the RABBITMQ_HOME in rabbitmq-env
    inreplace (sbin + 'rabbitmq-env'), 'RABBITMQ_HOME="${SCRIPT_DIR}/.."', "RABBITMQ_HOME=#{prefix}"

    # Create the rabbitmq-env.conf file
    rabbitmq_env_conf = etc+'rabbitmq/rabbitmq-env.conf'
    rabbitmq_env_conf.write rabbitmq_env unless rabbitmq_env_conf.exist?

    # Enable the management web UI and visualiser
    enabled_plugins_path = etc+'rabbitmq/enabled_plugins'
    enabled_plugins_path.write enabled_plugins unless enabled_plugins_path.exist?

    # Extract rabbitmqadmin and install to sbin
    # use it to generate, then install the bash completion file
    system ("/usr/bin/unzip", "-qq", "-j", "#{prefix}/plugins/rabbitmq_management-#{version}.ez", "rabbitmq_management-#{version}/priv/www/cli/rabbitmqadmin")
    sbin.install 'rabbitmqadmin'

    system ("#{sbin}/rabbitmqadmin --bash-completion > rabbitmqadmin.bash")
    (prefix+'etc/bash_completion.d').install 'rabbitmqadmin.bash'

  end

  def caveats; <<-EOS.undent
    Management Plugin enabled by default at http://localhost:15672
    EOS
  end

  def enabled_plugins; <<-EOS.undent
      [rabbitmq_management,rabbitmq_management_visualiser].
    EOS
  end

  def rabbitmq_env; <<-EOS.undent
    CONFIG_FILE=#{etc}/rabbitmq/rabbitmq
    NODE_IP_ADDRESS=127.0.0.1
    NODENAME=rabbit@localhost
    EOS
  end

  plist_options :manual => 'rabbitmq-server'

  def plist; <<-EOS.undent
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN"
    "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
      <dict>
        <key>Label</key>
        <string>#{plist_name}</string>
        <key>Program</key>
        <string>#{opt_prefix}/sbin/rabbitmq-server</string>
        <key>RunAtLoad</key>
        <true/>
        <key>UserName</key>
        <string>#{`whoami`.chomp}</string>
        <key>EnvironmentVariables</key>
        <dict>
          <!-- need erl in the path -->
          <key>PATH</key>
          <string>/usr/local/sbin:/usr/bin:/bin:/usr/local/bin</string>
          <!-- specify the path to the rabbitmq-env.conf file -->
          <key>CONF_ENV_FILE</key>
          <string>#{etc}/rabbitmq/rabbitmq-env.conf</string>
        </dict>
      </dict>
    </plist>
    EOS
  end
end