#!/bin/bash
#set distro to script's parent directory


distro=$(cd ${0%/*} && echo $PWD/${0##*/})
distro=$(dirname $distro)

echo "distro:$distro"

distrolibs=$distro/libs
distroapps=$distro/apps
distroscripts=$distro/scripts
liblist=smartgears.list
applist=smartgears-app.list

function showhelp {
  			   echo -e "\nusage:  install [-d <distro directory>] -s tomcat|<lib directory> -a [app directory] [-g gHN directory] [-x|-h] \n" 
			   echo    "  <distro directory> = the directory with the distribution of SmartGears 4.0.0-SNAPSHOT."
			   echo    "                       By default, this is the parent directory of this script."
			   echo    "  <lib directory>    = the directory with libraries shared by all applications in the target container."
	    	   echo    "  <app directory>    = the directory with all the applications in the target container."
			   echo    "  <gHN directory>    = the directory with logs and files related to the gCube Hosting Node."
			   echo    "                       By default, this is value of the GHN_HOME env var."
			   echo    "  tomcat             = Sets <lib directory> and <app directory> for a target Tomcat container."
			   echo    "  x                  = dry run."
		       echo -e "  h                  = shows this help.\n"
}

while getopts ":d:s:g:a:xh" opt; do
  case $opt in
	d) distro=$OPTARG;;
    s) shared=$OPTARG;;
    g) ghnhome=$OPTARG;;
	a) apps=$OPTARG;;
    x) dryrun="true";;
    h) showhelp
exit 0 ;;
	:)  echo -e "\nERROR:option -$OPTARG requires an argument." >&2 ; 
				showhelp; 
				echo -e "\naborting.\n"
				exit 1;;
	\?) echo -e "\nERROR:invalid option: -$OPTARG"; 
			showhelp; 
			echo -e "\naborting.\n" 
			exit 1 >&2 ;;
  esac
done

if [ -z "$ghnhome" ]; then 
	if [ -z "$GHN_HOME" ]; then 
		echo -e "\nERROR:please specify the gHN directory (-g) or define the GHN_HOME env var." >&2
		showhelp
		echo -e "\naborting.\n"
		exit 1
	else
		ghnhome=$GHN_HOME
	fi
fi
if [ ! -d "$ghnhome" ]; then
	if [ -z "$dryrun" ]; then 
  		mkdir $ghnhome
	fi
fi

 
#tomcat target
if [ "$shared" = "tomcat" ]; then 
	if [ -z "$CATALINA_HOME" ]; then
        if [ -z "$WEB_CONTAINER_HOME" ] ; then
		    echo -e "\nERROR: both CATALINA_HOME and WEB_CONTAINER_HOME are undefined." >&2
		    showhelp
		    echo -e "\naborting.\n"
		    exit 1
        else
	        CATALINA_HOME=$WEB_CONTAINER_HOME
	    fi
    fi
	shared=$CATALINA_HOME/lib
	apps=$CATALINA_HOME/webapps
fi

#shared is set
if [ -z "$shared" ]; then 
	echo -e "\nERROR: shared directory is undefined (-s)." >&2
	showhelp
	echo -e "\naborting.\n"
	exit 1
fi

#shared exists and is a directory
if [ ! -d "$shared" ]; then
	echo -e "\nERROR: shared folder does not exist or is not a directory, aborting." >&2
	exit 1;
fi

#shared exists and is a directory
if [ ! -d "$apps" ]; then
	echo -e "\nERROR: apps folder does not exist or is not a directory, aborting." >&2
	exit 1;
fi

#distrolibs exists and is a directory
if [ ! -d "$distrolibs" ]; then
	echo -e "\nERROR: distro libs does not exist or is not a directory, aborting."  
	exit 1;
fi

#distroapps exists and is a directory
if [ ! -d "$distroapps" ]; then
	echo -e "\nERROR: distro apps does not exist or is not a directory, aborting."  
	exit 1;
fi

echo -e "\nInstalling SmartGears 4.0.0-SNAPSHOT\n"
echo -e " target gHN directory    = $(cd $(dirname $ghnhome); pwd)/$(basename $ghnhome)"
echo -e " target shared directory = $(cd $(dirname $shared); pwd)/$(basename $shared)"
echo -e " target app directory    = $(cd $(dirname $apps); pwd)/$(basename $apps)"

shopt -s nullglob

#uninstall libraries
if [ -f $shared/$liblist ]; then 
	echo -e "\nuninstalling existing libraries \c"
	while read line; do
		if [ -z "$dryrun" ]; then 
	  		rm $shared/$line 
		fi
	 echo -n "."
	 sleep .01

     done < $shared/$liblist  	
	 if [ -z "$dryrun" ]; then 
	  		rm $shared/$liblist
	 fi	 
	
fi

#uninstall apps
if [ -f $shared/$applist ]; then 
	echo -e "\nuninstalling existing apps \c"
	while read line; do
		if [ -z "$dryrun" ]; then 
	  		 rm  $apps/$line
             folder=${line:0:-4}
             if [ ! -z "$folder" ]; then 
             	rm -rf $apps/$folder
             fi
		fi
	 echo -n "."
	 sleep .01

     done < $shared/$applist  	
	 if [ -z "$dryrun" ]; then 
	  		rm $shared/$applist
	 fi	 
	
fi

#install libraries
echo -e "\ninstalling components            \c"
for f in $distrolibs/*.*;
	do
	  if [ -z "$dryrun" ]; then 
			cp $f $shared/ 
			basename $f | sed -r 's/[0-9]{1,2}.[0-9]{1,2}(.[0-9]{1,2})?(-SNAPSHOT)?(-[0-9]{1,2}.[0-9]{1,2}(.[0-9]{1,2})?-[0-9]{4,8})?/*/' >> $shared/$liblist
		fi
	  echo -n "."
      sleep .01
     done
	
	
#install apps
echo -e "\ninstalling applications          \c"
for f in $distroapps/*;
	do
	  if [ -z "$dryrun" ]; then 
	  		cp $f $apps/
	  		basename $f >> $shared/$applist
		fi
	  echo -n "."
    sleep .01
	done
	
#install scripts
echo -e "\ninstalling scripts               \c"
if [ ! -d "$ghnhome/scripts" ]; then
	if [ -z "$dryrun" ]; then 
	  	mkdir $ghnhome/scripts
	fi
fi

for f in $distroscripts/*;
	do
	  if [ -z "$dryrun" ]; then 
	  		cp $f $ghnhome/scripts/
		fi
	echo -n "."
    sleep .01
	done






#install config
function escape_slashes {
    sed 's/\//\\\//g' 
}

function change_line {
    local OLD_LINE_PATTERN=$1; shift
    local NEW_LINE=$1; shift
    local FILE=$1

    local NEW=$(echo "${NEW_LINE}" | escape_slashes)
    sed -i '/'"${OLD_LINE_PATTERN}"'/s/.*/'"${NEW}"'/' "${FILE}"
}


function replace_property {
	local PROPERTY=$1
	local NEW_LINE=$(sed -n "/${PROPERTY}/p" $distro/container.ini)
	change_line "${PROPERTY}" "${NEW_LINE}" $ghnhome/container.ini
}

echo -e "\ninstalling configuration         \c"
if [ ! -s "$ghnhome/container.ini" ]; then
	if [ -z "$dryrun" ]; then 
		cp $distro/container.ini $ghnhome/
	fi
	echo -n "."
    sleep .01
else
	if [ -z "$dryrun" ]; then 
		#echo "Creating a backup copy of $ghnhome/container.ini"
		cp $ghnhome/container.ini $ghnhome/container.ini.bck
		
		## Please note the ' at the end of SmartGearsDistribution property
		## the ' is needed to exactly math the property otherwise also
		## SmartGearsDistributionBundle is matched.
		for property in "SmartGearsDistribution'" "SmartGearsDistributionBundle'"
		do
			replace_property $property
		done
	fi
	echo -n "."
    sleep .01
fi
if [ -z "$dryrun" ]; then 
	 cat $distro/logback.xml | sed "s|\${LOGFILE}|$ghnhome|" > $shared/logback.xml
	 echo -n "."
    sleep .01
fi

#creating the symlink to shared and apps folder

if [ -z "$dryrun" ]; then
	ln -s $shared $ghnhome/lib
fi

if [ -z "$dryrun" ]; then
	ln -s $apps $ghnhome/apps
fi

echo -e "\ndone.\n"
