$:.unshift File.expand_path(File.join(File.dirname(__FILE__),'..','unix-like'))

require 'optparse'
require 'rho_connect_install_constants'
require 'fileutils'

options = {}

optparse = OptionParser.new do |opts|
  options[:dist] = nil
  opts.on( '-d', '--dist DISTRO', 'Specify DISTRO as the current distribution.' ) do |dist|
    options[:dist] = dist
  end #do

  options[:prefix] = '/opt/rhoconnect'
  opts.on( '-p', '--prefix RHODIR', 'Specify RHODIR as the prefix directory.' ) do |dir|
    options[:prefix] = dir
  end #do

  options[:redis] = true
  opts.on( '--no-redis', '', 'Skip installing the redis server.' ) do
    options[:redis] = false
  end #do

  options[:rubyVersion] = 'rubyee'
  opts.on( '-r', '--rubyVer VERSION', 'Specify VERSION as the verion of ruby that is installed.' ) do |rubyVer|
    options[:rubyVersion] = rubyVer
  end #do

  options[:web_server] = "nginx"
  opts.on('-w', '--web-server Server', ' Specify that you are using web server SERVER') do |server|
    options[:web_server] = server
  end #do

end #do

optparse.parse!

@prefix = options[:prefix]
@dist = options[:dist]
@redis = options[:redis]
@ruby_version = options[:rubyVersion]
@profile = (@dist == 'debian') ? '~/.profile' : '~/.bash_profile'
@server = options[:web_server]

def passenger_version
  (`#{@prefix}/bin/passenger --version`.match /\d+\.\d+\.\d+/)[0]
end

# create_redis_init
# Creates the redis initialization file and places it into the correct directory
def create_redis_init
  redis_init_script = <<'_REDIS_INIT_SCRIPT_'
#!/usr/bin/env bash
### BEGIN INIT INFO
# Provides:          redis-server
# Required-Start:    $syslog
# Required-Stop:     $syslog
# Should-Start:      $local_fs
# Should-Stop:       $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: redis-server - Persistent key-value db
# Description:       redis-server - Persistent key-value db
### END INIT INFO
#
# Author:  Wayne E. Seguin <wayneeseguin@gmail.com>
# License: The same licence as Redis, New BSD
#          http://www.opensource.org/licenses/bsd-license.php
#

# Source the system config file, if it exists.
if [[ -s /etc/conf.d/redis ]] ; then
  source /etc/conf.d/redis
fi

# Default config variables that have not been set.
port="${port:-6379}"
prefix="${prefix:-/opt/rhoconnect}"
redis="${prefix}/bin/redis-server"
redis_cli="${prefix}/bin/redis-cli"
pidfile="${pidfile:-/var/run/redis.pid}"
config="${config:-/opt/rhoconnect/etc/redis.conf}"
user="${user:-root}"
#prefix="${prefix:-/usr/local}"
#config="${config:-/usr/local/etc/redis.conf}"
#pidfile="${pidfile:-/var/run/redis/redis.pid}"
#config="${config:-/etc/redis/redis.conf}"
#user="${user:-redis}"

# If the redis-cli file is not found, terminate the script.
test -x $redis_cli || exit 0

#
# Set the running $pid value based on $pidfile.
#
if [[ -s "$pidfile" ]] ; then
  pid=$(cat $pidfile)
else
  rm -f $pidfile
fi

# In case there was pidfile corruption...
if [[ "Linux" = "$(uname)" ]] ; then
  # /proc does not exist on say, Darwin
  if [[ ! -z "${pid}" ]] && [[ ! -x "/proc/${pid}" ]] ;then
    pid="$(ps auxww | grep [r]edis | grep "$config" | grep -v 'grep' | awk '{print $2}')"
  elif [[ -z "${pid}" ]] ; then
    pid="$(ps auxww | grep [r]edis | grep "$config" | grep -v 'grep' | awk '{print $2}')"
  fi
else
  if [[ -z "${pid}" ]] ; then
    pid="$(ps auxww | grep [r]edis | grep "$config" | grep -v 'grep' | awk '{print $2}')"
  fi
fi

#
# Start redis using redis-server as user 'redis'.
#
redis_start() {
  if [[ -f $pidfile ]] ; then
    echo "$pidfile exists, redis-server is either already running or crashed."
    exit 1
  elif [[ ! -z "$pid" ]] ; then
    echo -e "\nRedis is already running with configuration '$config'."
    echo "$pid" > $pidfile # Ensure pidfile exists with the pid.
  else
    echo "Starting Redis server..."
    su $user -c "$redis $config"
    exit 0
  fi
}

#
# Stop redis using redis-cli SHUTDOWN.
#
redis_stop() {
  echo -n "Stopping redis server on port ${port} ... "
  "$redis_cli" -p ${port} SHUTDOWN

  # Keep user informed while server shuts down.
  echo "Waiting for the redis server to shutdown "

  if [[ "Linux" = "$(uname)" ]] ; then
    if [[ "${pid}" = "" ]] ; then
      echo "redis server is not running."
      # Clear out the old pidfile if available
      rm -f $pidfile
      exit 1
    fi
    while [[ -x /proc/${pid} ]] ; do
      echo -n '.' ; sleep 1
    done
  else # Darwin, etc...
    while [[ ! -z "$(ps auxww | grep [r]edis | grep "$config" | awk '{print $2}')" ]] ; do
      echo -n '.' ; sleep 1
    done
  fi

  # Clear out the old pidfile.
  rm -f $pidfile

  # Notify user of successful completion.
  echo -e "redis server stopped."
  exit 0
}

redis_usage() {
  echo -e "Usage: $0 {start,stop,restart,status}"
  exit 1
}

redis_status() {
  "$redis_cli" -p ${port} INFO > /dev/null 2>&1
  info=$?
  if (( $info )) ; then
    echo "Redis server not running";
  else
    echo "Redis server running";
  fi
  exit $info
}

#
# CLI logic.
#
case "$1" in
  start)  redis_start  ;;
  stop)   redis_stop   ;;
  restart)
          $0 stop
          $0 start
          ;;
  status) redis_status ;;
  *)      redis_usage   ;;
esac
_REDIS_INIT_SCRIPT_

  redisInit="/etc/init.d/redis"
  File.open(redisInit, 'w') { |f| f << redis_init_script }

  # Make the init script executable
  `chmod +x #{redisInit}`
  # Set run levels
  if @dist == 'debian'
    `update-rc.d -f redis defaults` 
  else
    `/sbin/chkconfig redis on`
    # `/sbin/chkconfig --list redis`
  end

  redis_init_script
end #create_redis_init

def create_redis_logrotate
  redis_logrotate_conf = <<'_REDIS_LOGRORATE_CONF_'
/var/log/redis.log {
    rotate 3
    missingok
    notifempty
    size 250k
    create 0644 root root
    compress
}
_REDIS_LOGRORATE_CONF_

  File.open('/etc/logrotate.d/redis', 'w') { |f| f << redis_logrotate_conf }  
end

#
# Nginx stuff ...

def create_nginx_init
  nginx_init_script = <<'_NGINX_INIT_SCRIPT_'
#!/bin/sh
# Author: Ryan Norbauer http://norbauerinc.com
# Modified: Geoffrey Grosenbach http://topfunky.com
# Modified: Clement NEDELCU
# Modified: Alexander Babichev 
# Reproduced with express authorization from its contributors

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin 
DESC="nginx daemon"
NAME=nginx
DAEMON=/opt/nginx/sbin/$NAME
SCRIPTNAME=/etc/init.d/$NAME

# If the daemon file is not found, terminate the script.
test -x $DAEMON || exit 0

d_start() {
  $DAEMON || echo -n " already running"
}

d_stop() {
  $DAEMON -s quit || echo -n " not running"
}

d_reload() {
  $DAEMON -s reload || echo -n " could not reload"
}

case "$1" in
  start)
    echo -n "Starting $DESC: $NAME"
    d_start
    echo "."
    ;; 
  stop)
    echo -n "Stopping $DESC: $NAME"
    d_stop
    echo "."
    ;; 
  reload)
    echo -n "Reloading $DESC configuration ... "
    d_reload
    echo "reloaded."
    ;;
  restart)
    echo -n "Restarting $DESC: $NAME"
    d_stop
    # Sleep for two seconds before starting again, this should give the
    # Nginx daemon some time to perform a graceful stop.
    sleep 2
    d_start
    echo "."
    ;; 
  *)
    echo "Usage: $SCRIPTNAME {start|stop|restart|reload}" >&2
    exit 3 
    ;;
esac
 
exit 0  
_NGINX_INIT_SCRIPT_

  nginx_script = '/etc/init.d/nginx'
  File.open(nginx_script, 'w') { |f| f << nginx_init_script }
  # Make the init script executable
  `chmod +x #{nginx_script}`

  # Set run levels
#  if @dist == 'debian'
#    #`update-rc.d -f nginx defaults`
#  else
#    #`/sbin/chkconfig nginx on`
#  end

end

def create_nginx_logrotate
  nginx_logrorate_conf = <<'_NGINX_LOGRORATE_CONF_'
/opt/nginx/logs/*log {
  missingok
  notifempty
  rotate 4
  size 100k
  delaycompress
  sharedscripts
  postrotate
    test ! -f /opt/nginx/logs/nginx.pid || kill -USR1 `cat /opt/nginx/logs/nginx.pid`
 endscript
}
_NGINX_LOGRORATE_CONF_

  File.open('/etc/logrotate.d/nginx', 'w') { |f| f << nginx_logrorate_conf }
end

def create_nginx_conf_files(app_name)
  nginx_server_conf = <<'_NGINX_CONF_'
user              nginx;

worker_processes  4;

error_log         logs/error.log;
pid               logs/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;
    #gzip  on;

    include /opt/nginx/conf/conf.d/*.conf;
}
_NGINX_CONF_

  # create 'nginx' user if it does not exist
  user_nginx = `cat /etc/passwd | cut -d: -f1 | grep nginx`
  if user_nginx.empty?
    puts "Creating 'nginx' user ..."
    if @dist == 'debian'
      `adduser --system --home /opt/nginx/html --no-create-home --disabled-login --disabled-password --group nginx`
    else
      `/usr/sbin/useradd -M -r -s /sbin/nologin -d /opt/nginx/html nginx`
    end   
  end
   
  FileUtils.mv("/opt/nginx/conf/nginx.conf", "/opt/nginx/conf/nginx.conf.bak") unless File.exist? "/opt/nginx/conf/nginx.conf.bak"
  File.open('/opt/nginx/conf/nginx.conf', 'w' ) { |f| f << nginx_server_conf }

  Dir.mkdir "/opt/nginx/conf/conf.d" unless File.exist? "/opt/nginx/conf/conf.d"
  rho_vhost_conf = <<_VHOST_CONF_
server {
  listen      80;
  root  /opt/nginx/html/#{app_name}/public; # <-- be sure to point to 'public' folder of your application!
  passenger_enabled on;
#  access_log off;                           # <-- disable access logging
#  error_log /dev/null crit;                 # <-- disable error logging, but critical errors only
}
_VHOST_CONF_
  File.open('/opt/nginx/conf/conf.d/rhoconnect.conf', 'w' ) { |f| f << rho_vhost_conf }

  passenger_conf = <<_PASSENGER_CONF_
passenger_root /opt/rhoconnect/lib/ruby/gems/1.8/gems/passenger-#{passenger_version};
passenger_ruby /opt/rhoconnect/bin/ruby;
passenger_max_pool_size 20;
passenger_min_instances 6;
_PASSENGER_CONF_
  File.open('/opt/nginx/conf/conf.d/passenger.conf', 'w' ) { |f| f << passenger_conf }
end

# End of nginx stuff ...


# generate_common_info
# Generates the readme info that is common across all distributions
def generate_common_info

  readme = <<_README_
Thank you for choosing Rhomobile for your cross-platform app needs!
To finish this setup, please complete the following...

1) Add necessary bins to the path(s) of the users who will
   be using this software.  You may also wish to add these items
   to your #{@profile} to automatically add them upon login.
      export PATH=#{@prefix}/bin:$PATH

   If you had other versions of ruby installed previously to running
   this installation, you may instead wish to simply create an alias
   for the newly installed ruby:
      alias #{@ruby_version}=#{@prefix}/bin/ruby

_README_

  if @dist == "yum"
    rpm_lib = <<_RPM_LIB_
   Add #{@prefix}/lib to your library path like so:
      export LD_LIBRARY_PATH=#{@prefix}/lib:$LD_LIBRARY_PATH

   Note: You may also want to add this line to #{@profile}

_RPM_LIB_
  # concatenate _RPM_LIB_ onto _README_
  readme = readme + rpm_lib
  end #if

  readme_2 = <<_README2_
2) Rhoconnect installer configured redis server with the following settings:

   A) redis.conf file is located in #{@prefix}/etc/ directory with properties:
      daemonize yes
      pidfile /var/run/redis.pid
      logfile /var/log/redis.log

   B) Redis logrotate settings for /var/log/redis.log files defined in '/etc/logrotate.d/redis': 

      /var/log/redis.log {
          rotate 3
          missingok
          notifempty
          size 250k
          create 0644 root root
          compress
      }

  C) Redis start-up script '/etc/init.d/redis'. 
     You can start/stop redis server by running the following commands:
       /etc/init.d/redis {start|stop}

3) Setup rhoconnect application directory

   Put your application code in a directory called /var/www/rhoconnect
   (make sure this is the root of your application directory, i.e. /var/www/rhoconnect/config.ru should exist).

_README2_
  readme = readme + readme_2

  readme
end #generate_common_info

def create_passenger_load
  if @dist == 'debian'
    passenger_load_file = '/etc/apache2/mods-available/passenger.load'
  else
    passenger_load_file = '/etc/httpd/conf.d/passenger.conf'
  end # if

  passenger_load = <<_PASSENGER_LOAD_
LoadModule passenger_module /opt/rhoconnect/lib/ruby/gems/1.8/gems/passenger-#{passenger_version}/ext/apache2/mod_passenger.so
PassengerRoot /opt/rhoconnect/lib/ruby/gems/1.8/gems/passenger-#{passenger_version}
PassengerRuby /opt/rhoconnect/bin/ruby
_PASSENGER_LOAD_

  File.open( passenger_load_file, 'w' ) { |f| f << passenger_load }
end #create_passenger_load

def create_apache_vhost
  if @dist == 'debian' 
    vhost_file = '/etc/apache2/sites-available/rhoconnect'
  else
    vhost_file = '/etc/httpd/conf.d/rhoconnect.conf' 
  end
  vhost = <<_VHOST_
<VirtualHost *:80>
  ServerName www.yourhost.com
  DocumentRoot /var/www/rhoapp/public
  PassengerMaxPoolSize 20
  PassengerMinInstances 6
  #...
  <Directory /var/www/rhoconnect/public>
    AllowOverride all
    Options -MultiViews
  </Directory>
</VirtualHost>
_VHOST_

  File.open( vhost_file, 'w' ) { |f| f << vhost }
end #create_apache_vhost

# The debian Apache2 specific part of the readme and places it in options[:prefix]
def debian_apache_readme
  readme = <<_README_
4) Installer created the following Apache2 configuration files:
   - rhoconnect application template (/etc/apache2/sites-available/rhoconnect)
   - passenger module (/etc/apache2/mods-available/passenger.load)
     
   To complete setup of web server
   A) Configure virtual host for rhoconnect application:
      Edit the file /etc/apache2/sites-available/rhoconnect so that it reflects your specifications.

   B) Enable the virtual host:
      sudo a2ensite rhoconnect

   C) Load the passenger.load module
      sudo a2enmod passenger

   D) Start server to pick up the changes:
      sudo /etc/init.d/apache2 start
_README_

  readme
end
  
# The non-debian Apache2 specific part of the readme file and places it in options[:prefix]
def yum_apache_readme
  readme = <<_README_
4) Installer created the following Apache2 configuration files:
   - rhoconnect application template (/etc/httpd/conf.d/rhoconnect.conf)
   - passenger module (/etc/httpd/conf.d/passenger.conf)

   To complete setup of web server
   A) Configure virtual host for rhoconnect application:
      Edit the file /etc/httpd/conf.d/rhoconnect.conf so that it reflects your specifications.

   B) As root user start server to pick up the changes:
      /sbin/service httpd start
_README_

  readme
end

def nginx_readme
  readme = <<_NGINX_README_
4) Installer compiled Nginx web server (/opt/nginx) with the following configuration files:
   - Nginx start-up script (/etc/init.d/nginx)
   - Nginx logrotate settings (/etc/logrotate.d/nginx)
   - Nginx configuration file (/opt/nginx/conf/nginx.conf) 
   - passenger configuration file and virtual host template for rhoconnect application 
     (/opt/nginx/conf/conf.d/passenger.conf and /opt/nginx/conf/conf.d/rhoconnect.conf)

     To complete setup of web server
     A) Configure virtual host for rhoconnect application:
        Edit the file /opt/nginx/conf/conf.d/rhoconnect.conf so that it reflects your specifications.

     B) As root user start server to pick up the changes:
        /etc/init.d/nginx start
_NGINX_README_
  readme
end

def generate_rhoapp(rho_path)
  puts "Generating rhoconnect application: /opt/nginx/html/rhoapp ..."
  Dir.chdir "/opt/nginx/html"
  unless File.directory? "/opt/nginx/html/rhoapp"
    `#{rho_path}/bin/rhoconnect app rhoapp`
    Dir.chdir "rhoapp"
    log = `#{rho_path}/bin/bundle install --without=test development`
    raise "Generatiion of rhoconnect application failured:\n#{log}" if $? != 0
    Dir.chdir "../"
    `chown -R nginx:nginx rhoapp/`
  end
end

def copy_benchapp(rho_path)
  puts "Copy bench rhoconnect application to /opt/nginx/html directory ..."
  Dir.chdir "#{rho_path}/installer"
  `tar xzf bench.tar.gz -C #{rho_path}`
  `rm -rf bench.tar.gz`

  `#{rho_path}/bin/gem install ffaker --no-ri --no-rdoc`
  `#{rho_path}/bin/gem install thor --no-ri --no-rdoc`

  Dir.chdir "#{rho_path}/bench"
  `cp -r benchapp /opt/nginx/html`
  Dir.chdir "/opt/nginx/html/benchapp"
  `rm -rf Gemfile.lock`
  `#{rho_path}/bin/bundle install --without=test development`
  Dir.chdir "../"
  `chown -R nginx:nginx benchapp/`
end

def create_texts
  if @redis
    create_redis_init 
    create_redis_logrotate
  end

  if @server == 'nginx'
    create_nginx_init

    create_nginx_logrotate
    @use_bench_app = File.exist? "#{@prefix}/installer/bench.tar.gz"
    if @use_bench_app
      create_nginx_conf_files "benchapp"
      copy_benchapp @prefix
    else
      create_nginx_conf_files "rhoapp"
      generate_rhoapp @prefix
    end

    distro_info = nginx_readme
  else
    create_passenger_load
    create_apache_vhost
    distro_info = (@dist == 'debian') ? debian_apache_readme : yum_apache_readme
  end

  common_info = generate_common_info
  readme = common_info + distro_info  
  File.open("#{@prefix}/README", 'w') { |f| f << readme }

  afterwords = <<_IT_SHOULD_BE_DONE_

Thank you for choosing Rhomobile for your cross-platform app needs!
To finish this setup, please complete the following...
 
1) Add necessary bins to the path(s) of the users who will
   be using this software. You may also wish to add these items
   to your #{@profile} to automatically add them upon login.
     export PATH=#{@prefix}/bin:$PATH

_IT_SHOULD_BE_DONE_

  about_app =
    if @use_bench_app
      server_todo_list = <<_NGINX_TO_DO_
2) Rhoconnect 'benchapp' application is created in /opt/nginx/html directory. To run it
  A) As root user start redis and nginx servers:
     /etc/init.d/redis start
     /etc/init.d/nginx start
  B) To verify that application up and running open web console in your browser:
     http://localhost/console/

_NGINX_TO_DO_
    else
      if  @server == 'nginx'
        server_todo_list = <<_NGINX_TO_DO_
2) Try rhoconnect 'rhoapp' application, created in /opt/nginx/html directory
  A) As root user start redis and nginx servers:
     /etc/init.d/redis start
     /etc/init.d/nginx start
  B) Open RhoConnect application web console in your browser:
     http://localhost/console/

_NGINX_TO_DO_
      else
        server_todo_list = <<_APACHE2_TO_DO_
2) Complete setup of Apache2 web server
   A) Configure virtual host for your rhoconnect application:
      Edit the file /etc/httpd/conf.d/rhoconnect.conf so that it reflects your specifications.
   B) As root user start server to pick up the changes:
      /sbin/service httpd start
       
_APACHE2_TO_DO_
      end
    end

  puts afterwords + about_app   + "For more details see #{@prefix}/README file."

end #create_texts

create_texts