#!/bin/bash

# Directory
prefix=@prefix@
datarootdir=@datarootdir@
datadir=@datadir@

# Enable NLS
export TEXTDOMAIN=update-from-skel
export TEXTDOMAINDIR=@localedir@

. gettext.sh

# output when differential is detected.
detect_different()
{
	echo
	echo "`eval_gettext "==================="`"
	echo "`eval_gettext "Detect differential"`"
	echo "`eval_gettext "==================="`"
}

# process different files.
proc_different()
{
	COLUMNS=$(tput cols)
	HALFCOL=$(expr $COLUMNS / 2 - 2)

	detect_different

	ok=0
	while [ $ok -eq 0 ]
	do
		printf "%-${HALFCOL}s%-${HALFCOL}s\n" ${myfile} ${skel}
		echo
		diff --side-by-side -W ${COLUMNS} $myfile $skel
		# menu
		echo "`eval_gettext "C) use Current file"`"
		echo "`eval_gettext "T) use Template file"`"
		echo "`eval_gettext "E) Edit on diff mode of vim"`"
		echo "`eval_gettext "I) merge Intaractively by sdiff"`"
		echo "`eval_gettext "Q) Quit"`"
		echo -n "`eval_gettext "What do you do? > "`"
		read command
		
		case "$command" in
		c|C)
			ok=1
			;;
		t|T)
			echo "`eval_gettext "copy \\\$skel to \\\$myfile"`"
			cp -i $skel $myfile
			diff -q $skel $myfile >/dev/null 2>&1
			if [ $? -eq 0 ]; then
				ok=1
			fi
			;;
		e|E)
			vim +r$myfile -d $myfile.new $skel
			if [ -e $myfile.new ];then
				mv $myfile.new $myfile
			fi
			diff -q $skel $myfile >/dev/null 2>&1
			if [ $? -eq 0 ]; then
				ok=1
			fi
			;;
		i|I)
			sdiff -o $myfile.new -w ${COLUMNS} $myfile $skel
			mv $myfile.new $myfile
			ok=1
			;;
		q|Q)
			exit
			;;
		*)
			echo "`eval_gettext "You inputed wrong character."`"
			echo
			;;
		esac
	done
	echo
}

# process no exists file
proc_no_exists()
{
	detect_different
	echo "`eval_gettext "\\\$skel is exists, but \\\$myfile isn't exists."`"
	echo
	ok=0
	while [ $ok -eq 0 ]
	do
		echo "`eval_gettext "C) Copy \\\$skel to \\\$myfile"`"
		echo "`eval_gettext "N) Nothing to do"`"
		echo "`eval_gettext "Q) Quit"`"
		echo -n "`eval_gettext "What do you do? > "`"
		read command
		
		case "$command" in
		c|C)
			mkdir -p `dirname $myfile`
			cp $skel $myfile
			ok=1
			;;
		n|N)
			ok=1
			;;
		q|Q)
			exit
			;;
		*)
			echo "`eval_gettext "You inputed wrong character."`"
			echo
			;;
		esac
	done
}

# process unexpected directory
proc_dir()
{
	detect_different
	echo "`eval_gettext "\\\$skel is file, but \\\$myfile is directory."`"
	echo
	ok=0
	while [ $ok -eq 0 ]
	do
		echo "`eval_gettext "R) Remove directory (\\\$myfile) and copy \\\$skel to \\\$myfile"`"
		echo "`eval_gettext "L) List contents of \\\$myfile"`"
		echo "`eval_gettext "N) Nothing to do"`"
		echo "`eval_gettext "Q) Quit"`"
		echo -n "`eval_gettext "What do you do? > "`"
		read command
		
		case "$command" in
		r|R)
			rm -rf $myfile
			cp $skel $myfile
			ok=1
			;;
		l|L)
			ls $myfile
			;;
		n|N)
			ok=1
			;;
		q|Q)
			exit
			;;
		*)
			echo "`eval_gettext "You inputed wrong character."`"
			echo
			;;
		esac
	done
}

# main loop
for skel in `find /etc/skel -type f 2>/dev/null`
do
	myfile=`echo $skel | sed -e "s|/etc/skel|$HOME|"`
	if [ -e $myfile -a -f $myfile ];then
		diff -q $myfile $skel >/dev/null 2>&1
		case $? in
		0)
			echo "`eval_gettext "There is no different beetween \\\$myfile and \\\$skel ."`"
			;;
		1)
			proc_different
			;;
		2)
			echo "`eval_gettext "Unknown error was occured when compare beetween \\\$myfile and \\\$skel ."`"
			;;
		esac
	elif [ -d $myfile ]; then
		proc_dir
	else
		proc_no_exists
	fi
done