#!/bin/bash

main ()
{
	tempDir="${destinationDrive}/.Chameleon/"
	echo "DEBUG: tempDir is ${tempDir}"


	if [ ! -d "${tempDir}" ]; then
		echo "the temporary directory does not exist so no boot options have been selected"
	else
		# check for see if there are any boot options in the temporary directory

		cd "${tempDir}"
		Dirlist=$(ls | grep "@")

		if [ "${Dirlist}" ]; then

			echo "==============================================="
			echo "set com.apple.Boot.plist variables"
			echo "**********************************"

			bootplist="${tempDir}/Extra/com.apple.Boot.plist"
			echo "DEBUG: bootplist = ${bootplist}"	

			systemplist="/Library/Preferences/SystemConfiguration/com.apple.Boot.plist"
			echo "DEBUG: systemplist= ${systemplist}"

			echo "if no directory exists named ${bootplist%/*} then mkdir ${bootplist%/*}"
			[ ! -d "${bootplist%/*}" ] && mkdir -p "${bootplist%/*}"

			if [ ! -f "${bootplist}" ]; then
				echo "${bootplist} doesn't exist"
				if [ -f "${systemplist}" ]; then
					echo "${systemplist} doesn't exist"
					echo "copy ${systemplist} to ${bootplist}"
					cp  "${systemplist}" "${bootplist}"
				fi
			fi
			echo "-----------------------------------------------"
			echo ""


			echo "==============================================="
			echo "Build Extra/com.apple.Boot.plist"
			echo "********************************"

			for bootOptionFile in $Dirlist ; do
				overide=$(echo $bootOptionFile | sed 's/_/ /g' | tr -d "./@" |cut -d '+' -f1)
				string=$(echo $bootOptionFile | tr -d "./@" |cut -d'+' -f2)

				bootoptionshdextra[1]="<key>${overide}</key>"
				bootoptionshdextra[2]="<string>${string}</string>"
				#echo "DEBUG: bootoptionshdextra 1 = ${bootoptionshdextra[1]}"
				#echo "DEBUG: bootoptionshdextra 2= ${bootoptionshdextra[2]}"

				echo "Attempting to add ${overide}=${string} to ${bootplist}"
	 			array=("${bootoptionshdextra[@]}")
				searchfilereplaceline "${bootplist}" "<key>Kernel Flags</key>" "" "" "2"
				echo ""

				#echo "set owner privileges for ${bootplist}"
				chown "${USER}:20" "${bootplist}"
			done

			echo "-----------------------------------------------"
			echo ""
		

			echo "==============================================="
			echo "Clean up and Remove Boot Option Null Files"
			echo "******************************************"

			#cd "${3}/.Chameleon/"
			Dirlist=$(find . -type f | grep "@")
			for bootOptionFile in $Dirlist ; do
				echo $bootOptionFile
				rm $bootOptionFile
			done

			echo "-----------------------------------------------"
			echo ""

		else
			echo "No boot options in the temporary directory."
		fi
	fi
}


searchfilereplaceline ()
{

mv "${1}" "${1}.orig"

prefunctionifs="${IFS}"

unset fileinput
unset fileoutput
unset find
unset replace
unset deletelines
unset deletelinesskip
unset insertlinesskip

fileinput="${1}.orig"
fileoutput="${1}"
find="${2}"
replace="${3}"
deletelines="${4%,*}"
insertlinesskip="${5}"

matchlinefound="0"

if [ "${#4}" = "${4#*,}" ]; then
        deletelinesskip="0"
	else
	deletelinesskip="${4#*,}"
fi

IFS="\n"
while read line
do
	{
	if [ ! "${line}" = "${line/${find}/}" ]; then
		{
		# Trim the longest match from the end for <*
		xmlelementindent="${line%%<*}"

		# Trim the longest match from the start for *<
		xmlelementtemp="${line#*<}"
		# Add back in stripped <
		xmlelement="<${xmlelementtemp}"

		# Trim the shortest match from the start for <
		xmltagtemp="${xmlelement#<}"
		# Trim the longest match from the end for >*
		xmltag="${xmltagtemp%%>*}"

		# Trim the shortest match from the start for *>
		xmltexttemp="${xmlelement#*>}"
		# Trim the longest match from the end for <*
		xmltext="${xmltexttemp%%<*}"

		if [ "${replace}" ]; then
		echo "DEBUG: Replace=${replace}"
			{
				echo "${xmlelementindent}<${xmltag}>${replace}</${xmltag}>" >>"${fileoutput}"
			}
			else
			{
				echo "${line}" >>"${fileoutput}"
			}
		fi
		matchlinefound="1"

		}
		else
		{

		if [ "${insertlinesskip}" ] && [ "${matchlinefound}" -gt 0 ] && [ "${matchlinefound}" -le "${insertlinesskip}" ]; then
			{
			if [ "${matchlinefound}" = "${insertlinesskip}" ]; then
				{
				arraysize=0
				while [ ${arraysize} -lt ${#array[@]} ];
				do
					#echo "DEBUG: ${xmlelementindent}${array[${arraysize}]}"
					echo "${xmlelementindent}${array[${arraysize}]}" >>"${fileoutput}"
				        let arraysize="${arraysize}+1"
				done
				}
			fi
			}
		fi

		if [ "${deletelines}" ] && [ "${matchlinefound}" -gt 0 ] && [ "${matchlinefound}" -lt $((${deletelines}+${deletelinesskip})) ] && [ "${matchlinefound}" -ge ${deletelinesskip} ]; then
		echo "DEBUG: Delete=${matchlinefound}"
			{
			:
			}
			else
			{
			echo "${line}" >>"${fileoutput}"
			}
		fi

		if [ "${matchlinefound}" -gt 0 ]; then
			let matchlinefound="${matchlinefound}+1"
		fi

		}
	fi
	}
done < "${fileinput}"

IFS=${prefunctionifs}

rm -f "${fileinput}"
}


echo "==============================================="
echo "Enter Build Boot Options script"
echo "*******************************"

# get the passed destination drive?

if [ "$#" -eq 1 ]; then
	destinationDrive="$1"
	echo "DEBUG: passed argument for destinationDrive = $destinationDrive"
fi

# Build Boot Options
main "${1}" "${2}" "${3}" "${4}"

exit 0
