#!/bin/bash
#   Copyright (c) 2010-2011, Diaspora Inc.  This file is
#   licensed under the Affero General Public License version 3 or later.  See
#   the COPYRIGHT file.

# ensure right directory
realpath=$( ruby -e "puts File.expand_path(\"$0\")")
cd $(dirname $realpath)/..

#Warn if legacy config exists
if [ -e 'config/script_server.yml' ]; then
  echo "WARNING: config/script_server.yml was merged into config/diaspora.yml. Please read the changelog!" >&2
fi

# Check if database.yml exists
if [ ! -e 'config/database.yml' ]; then
  echo 'FATAL: config/database.yml is missing! Copy over config/database.yml.example to config/database.yml and edit it properly!' >&2
  exit 68
fi

# Check if diaspora.yml exists
if [ ! -e 'config/diaspora.yml' ]; then
  echo 'FATAL: config/diaspora.yml is missing! Copy over config/diaspora.yml.example to config/diaspora.yml and edit it properly!' >&2
  exit 70
fi


# Setup environment
if [ -z "$RAILS_ENV" ]; then
  export RAILS_ENV=$(bundle exec ruby ./script/get_config.rb server.rails_environment)
fi

os=`uname -s`
eval $(bundle exec ruby ./script/get_config.rb \
  port=server.port \
  db=server.db \
  workers=server.resque_workers \
  single_process_mode=environment.single_process_mode?
  embed_resque_worker=server.embed_resque_worker
)

if [ -z "$DB" ]; then
  export DB=$db
fi

if [ "$single_process_mode" = "true" -o "$embed_resque_worker" =  "true" ]; then
  workers=0
fi

args="$@"
prev_arg=''
for arg in $( echo $args | awk '{ for (i = 1; i <= NF; i++) print $i}')
do
  [ "$prev_arg" = '-p' ] && port="$arg"
  prev_arg="$arg"
done

# Check if already running/port blocked
function chk_service
{
  port=${1:?Missing port}
  case $os in
  *[Bb][Ss][Dd]*|Darwin)
      ## checks ipv[46]
      netstat -anL | awk '{print $2}' | grep "\.$1$"
  ;;
  *)
      # Is someone listening on the ports already? (ipv4 only test ?)
      netstat -nl | grep '[^:]:'$port'[ \t]'
  ;;
  esac
}


services=$( chk_service $port )
if [ -n "$services" ]; then
  echo "FATAL: Error: port $port is already in use. Exiting" >&2
  echo "     $services"
  exit 64
fi


# Force AGPL
if [ -w public -a ! -e  public/source.tar.gz ]; then
  branch=$( git branch | awk '/^[*]/ {print $2}')
  tar czf public/source.tar.gz  `git ls-tree -r $branch | awk '{print $4}'`
fi

if [ ! -e public/source.tar.gz ]; then
  echo "FATAL: Error: Can't find, or even create, public/source.tar.gz. Exiting" >&2
  exit 65
fi

# Check if assets are precompiled
if [ "$RAILS_ENV" == 'production' ]; then
  if [ ! -e 'public/assets/default.css' ]; then
    echo "FATAL: You're running in production mode without having assets precompiled." >&2
    echo "Now and after each update before you restart the application, run:" >&2
    echo "bundle exec rake assets:precompile" >&2
    exit 71
  fi
fi


# Start Diaspora
echo -n "Starting Diaspora in $RAILS_ENV mode on port $port "
if [ "$embed_resque_worker" = "true" ]; then
  echo "with a resque worker embeded into unicorn."
elif [ "$single_process_mode" = "true" ]; then
  echo "with job processing inside the request cycle."
else
  echo "with $workers resque workers."
fi
echo ""

bundle exec foreman start -m "web=1,worker=$workers" -p $port