#!/bin/bash
###################################################
# VirtualBox VM Scripts 18.6.1 - Common functions
# by ulisse aka A. Livio Beccaria
###################################################

# the user executing these scripts
USER=`whoami`

# templates folder
TEMPLATE_DIR="${SRC_DIR}/templates"

#-------------------------------------------------------------------------------

# some terminal output formatting helpers
BOLD=$(tput bold) # bold
NORMAL=$(tput sgr0) # reset formatting
RED=$(tput setaf 1) # red
GREEN=$(tput setaf 2) # green
ERROR=$RED # error

# WARNING: this function is just for reference,
# its only purpose is to remind me how to get a script's source folder properly
# (the inner command is used at the very beginning of these vbox-scripts, too)
get_script_source_folder () {
		local myscript=$1
		# some alternatives:
		#echo "$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
		#echo "$( cd "${BASH_SOURCE[0]%/*}" && pwd )"
		#echo "$(dirname $(readlink -f ${BASH_SOURCE[0]}))"
		#echo "$(dirname $(readlink -f $0))"
		echo "$(dirname $(readlink -f $myscript))"
}

# Check if files matching a wildcard name exist.
# Example: doesAnyFileExist "test*.settings"
doesAnyFileExist () {
   local arg="$*"
   local files=($arg)
   [ ${#files[@]} -gt 1 ] || [ ${#files[@]} -eq 1 ] && [ -e "${files[0]}" ]
}

#declare -a vms=()

# Get all VMs' IDs and put them in the global array vms
#create_vm_list () {
#		vms=()
#		local vms_user=()
#		local vms_global=()
#
#		if [ -d "${VM_SETTINGS_DIR}" ]; then
#				# add settings files in the folder
#				for f in $(ls -U "${VM_SETTINGS_DIR}/"*.settings 2> /dev/null) ; do
#						vms_global=("${vms_global[@]}" "`basename $f .settings`")
#				done
#		fi
#		if [ -d "${VM_USER_SETTINGS_DIR}" ]; then
#				# add settings files in the folder
#				for f in $(ls -U "${VM_USER_SETTINGS_DIR}/"*.settings 2> /dev/null) ; do
#						vms_user=("${vms_user[@]}" "`basename $f .settings`")
#				done
#		fi
#
#		# get the final list removing duplicates
#		OLDIFS="$IFS"
#		IFS=$'\n'
#		vms=(`for R in "${vms_user[@]}" "${vms_global[@]}" ; do echo "$R" ; done | sort -du`)
#		IFS="$OLDIFS"
#}


declare -A vms

# Get all VMs' IDs and put them in the global associative array vms
# key <== VM_ID
# value <== settings file
create_vm_list () {
		vms=()

		if [ -d "${VM_SETTINGS_DIR}" ]; then
				# add settings files in the folder
				for f in $(ls -U "${VM_SETTINGS_DIR}/"*.settings 2> /dev/null) ; do
						vms_id=("`basename $f .settings`")
						vms[$vms_id]=$f
				done
		fi
		if [ -d "${VM_USER_SETTINGS_DIR}" ]; then
				# add settings files in the folder
				for f in $(ls -U "${VM_USER_SETTINGS_DIR}/"*.settings 2> /dev/null) ; do
					vms_id=("`basename $f .settings`")
					vms[$vms_id]=$f
				done
		fi
}


# Print all available VMs' IDs
print_vm_list () {
		create_vm_list
		# make a sorted array by key (vm_id)
		mapfile -d '' sorted < <(printf '%s\0' "${!vms[@]}" | sort -z)
		echo "Available VM IDs:"
		for k in "${sorted[@]}"; do
				echo -n "${BOLD}  ${k}${NORMAL}"
				if [[ ${vms[$k]} == ${VM_USER_SETTINGS_DIR}* ]]; then
						echo "${GREEN} (user)${NORMAL}"
				else
						echo
				fi
		done
}


# Get a VM's settings given its ID
get_vm_settings_by_id () {
	  create_vm_list
		echo "${vms[$1]}"
#		local fuser=""
#		local fglobal=""
#		fuser=`find ${VM_USER_SETTINGS_DIR} -name $1.settings`
#	  if [ "$fuser" != "" ]; then
#	    	echo "$fuser"
#	  else
#				fglobal=`find ${VM_SETTINGS_DIR} -name $1.settings`
#				if [ "$fglobal" != "" ]; then
#	      		echo "$fglobal"
#				else
#						echo ""
#				fi
#	  fi
}

# Get a VM's settings given its name
get_vm_settings_by_name () {
		local fuser=""
		local fglobal=""
		fuser=`grep -liR "VM_NAME=\"$1\"" ${VM_USER_SETTINGS_DIR}/*.settings`
		if [ "$fuser" != "" ]; then
				echo "$fuser"
		else
				fglobal=`grep -liR "VM_NAME=\"$1\"" ${VM_SETTINGS_DIR}/*.settings`
				if [ "$fglobal" != "" ]; then
						echo "$fglobal"
				else
						echo ""
				fi
		fi
}

# Get a VM's settings given its ID or name
get_vm_settings () {
		local vm_id=$1
		local vm_settings=""
		vm_settings=`get_vm_settings_by_id "${vm_id}"`
		if [[ "$vm_settings" == "" ]]; then
		  	vm_settings=`get_vm_settings_by_name "${vm_id}"`
		fi
		echo "${vm_settings}"
}

# Get a VM's ID given its name
get_vm_id_by_name () {
		local fuser=`grep -liR "VM_NAME=\"$1\"" ${VM_USER_SETTINGS_DIR}/*.settings`
	  if [ "$fuser" != "" ]; then
	    	echo `basename $fuser .settings`
	  else
				local fglobal=`grep -liR "VM_NAME=\"$1\"" ${VM_SETTINGS_DIR}/*.settings`
				if [ "$fglobal" != "" ]; then
	      		echo `basename $fglobal .settings`
				else
						echo ""
				fi
	  fi
}

# Terminate the script with a message and an error code
die () {
  	echo  >&2 "$@"
		exit 1
}