#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2011, OpenNebula Project Leads (OpenNebula.org)             #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #


if [ -z "$ONE_LOCATION" ]; then
    SUNSTONE_PID=/var/run/one/sunstone.pid
    SUNSTONE_SERVER=/usr/lib/one/sunstone/config.ru
    SUNSTONE_LOCK_FILE=/var/lock/one/.sunstone.lock
    SUNSTONE_LOG=/var/log/one/sunstone.log
else
    SUNSTONE_PID=$ONE_LOCATION/var/sunstone.pid
    SUNSTONE_SERVER=$ONE_LOCATION/lib/sunstone/config.ru
    SUNSTONE_LOCK_FILE=$ONE_LOCATION/var/.sunstone.lock
    SUNSTONE_LOG=$ONE_LOCATION/var/sunstone.log
fi

PORT="4567"
HOST="127.0.0.1"

usage() {
 echo
 echo "Usage: sunstone-server [-H host] [-p port]"
 echo
 echo "-H: Host for the Sunstone server, default value: localhost"
 echo "-p: Port for incoming connections, default value: 4567"
}

setup()
{

  if [ -f $SUNSTONE_LOCK_FILE ]; then
    if [ -f  $SUNSTONE_PID ]; then
      SUNSTONEPID=`cat $SUNSTONE_PID`
      ps $SUNSTONEPID &> /dev/null
      if [ $? -eq 0 ]; then
        echo "Sunstone Server is still running (PID:$SUNSTONEPID). Please try 'sunstone-server stop' first."
        exit 1
      fi
    fi
    echo "Stale .lock detected. Erasing it."
    rm $SUNSTONE_LOCK_FILE
  fi
}


start()
{
  if [ ! -f "$SUNSTONE_SERVER" ]; then
    echo "Can not find $SUNSTONE_SERVER."
    exit 1
  fi

  # Start the sunstone daemon
  touch $SUNSTONE_LOCK_FILE
  rackup $SUNSTONE_SERVER -s thin -p $PORT -o $HOST -P $SUNSTONE_PID &> $SUNSTONE_LOG &

  LASTRC=$?

  if [ $LASTRC -ne 0 ]; then
    echo "Error executing $SUNSTONE_SERVER"
    exit 1
  fi

  sleep 1
  ps $LASTPID &> /dev/null

  if [ $? -ne 0 ]; then
    echo "Error executing $SUNSTONE_SERVER."
    exit 1
  fi

  echo "sunstone-server started"
}

#
# Function that stops the daemon/service
#
stop()
{
  if [ ! -f $SUNSTONE_PID ]; then
    echo "Couldn't find sunstone-server process pid."
    exit 1
  fi

  # Kill the sunstone daemon
  kill -INT `cat $SUNSTONE_PID` &> /dev/null

  # Remove pid files
  rm -f $SUNSTONE_LOCK_FILE &> /dev/null

  echo "sunstone-server stopped"
}

while getopts "p:H:" OPTION
do
  case $OPTION in
    p) PORT=$OPTARG;;
    H) HOST=$OPTARG;;
    *) usage; exit 3;;
  esac
done

shift $((OPTIND-1))

case "$1" in
  start) setup; start;;
  stop)  stop;;
  *)     usage; exit 3;;
esac
