#/bin/sh -e

# Source debconf library.
. /usr/share/debconf/confmodule

# Function for grabbing a parameter from an smb.conf file
smbconf_retr() {
	if [ -z "$1" ]; then
		return
	fi

	if [ -n "$2" ]; then
		local FILE="$2"
	fi

	if [ -z "$FILE" ]; then
		return
	fi

	sed -n -e"
		s/^[[:space:]]*\[global\]/\[global\]/i
		/^\[global\]/,/^[[:space:]]*\[/ {
			s/^[[:space:]]*$1[[:space:]]*=[[:space:]]*//pi
		}" $FILE \
	| tail -n 1
}

FILE=/etc/samba/smb.conf

db_title "Samba Server"

# We ask the question IFF the config contains complex options that could
# cause us to break the config.
if [ -f "$FILE" ] && grep -v dhcp.conf $FILE \
                     | grep -qEi '\\$|^[[:space:]]*include[[:space:]]*='
then
	db_input high samba-common/do_debconf || true
	db_go
else
	db_set samba-common/do_debconf true
fi

# If user doesn't want to use debconf to configure Samba the leave...
db_get samba-common/do_debconf || true
if [ "${RET}" = "false" ]; then
	exit 0
fi

# User wants to use debconf, let's continue...

# Adjust priority of the question about the workgroup name depending
# on whether a workgroup name has already being specified.
db_get samba-common/workgroup || true
if [ "${RET}" ]; then
	WGPRIORITY=medium
else
	WGPRIORITY=high
fi

# Preload any values from the existing smb.conf file
if [ -f $FILE ]; then
	WORKGROUP=`smbconf_retr workgroup`
	if [ "$WORKGROUP" ]; then
		db_set samba-common/workgroup "$WORKGROUP"
	fi

	ENCRYPT=`smbconf_retr "encrypt passwords"`
	if [ "$ENCRYPT" ]; then
		ENCRYPT=`echo $ENCRYPT | tr '[A-Z]' '[a-z]'`
		if [ "$ENCRYPT" = "yes" ]; then
			ENCRYPT=true
		elif [ "$ENCRYPT" = "no" ]; then
			ENCRYPT=false
		fi

		db_set samba-common/encrypt_passwords "$ENCRYPT"
	fi

	CHARSET=`smbconf_retr "character set"`
	CODEPAGE=`smbconf_retr "client code page"`
	UNIXCHARSET=`smbconf_retr "unix charset"`
	DOSCHARSET=`smbconf_retr "dos charset"`

	# If we're upgrading from an old version and there's no
	# 'passdb backend' setting, add one.
	if [ "$1" = "configure" -a -n "$2" ] \
	   && dpkg --compare-versions "$2" lt 2.99.cvs.20020713-2 \
	   && ! grep -q -i '^[[:space:]]*passdb backend[[:space:]]*=' $FILE
	then
		TMPFILE=/etc/samba/smb.conf.dpkg-tmp
		sed -e'
			s/^\([[:space:]]*\)\[global\]/\1\[global\]/i
			s/^\([[:space:]]*\)encrypt passwords/\1encrypt passwords/i
			/^[[:space:]]*\[global\]/,/^[[:space:]]*\[/ {
				/^[[:space:]]*encrypt passwords[[:space:]]*=/a \
   passdb backend = smbpasswd guest
			}' < $FILE > ${TMPFILE}
		chmod a+r ${TMPFILE}
		mv -f ${TMPFILE} /etc/samba/smb.conf
	fi
fi

# Get workgroup name
db_input $WGPRIORITY samba-common/workgroup || true
db_go

# Use encrypted passwords?
db_input medium samba-common/encrypt_passwords || true
db_go

# Handle migrating character sets
if [ -n "$CHARSET" -a -z "$UNIXCHARSET" ]
then
	UNIXCHARSET=`echo $CHARSET | sed -e's/iso-/ISO/i'`
	db_set samba-common/character_set "$UNIXCHARSET"
	# FIXME: should eventually be low.
	db_input medium samba-common/character_set || true
	db_go
fi

if [ -n "$CODEPAGE" -a -z "$DOSCHARSET" ]
then
	DOSCHARSET=CP`echo $CODEPAGE | sed -e's/[[:alpha:]]*//g'`
	db_set samba-common/codepage "$DOSCHARSET"
	# FIXME: should eventually be low.
	db_input medium samba-common/codepage || true
	db_go
fi

DHCPPRIORITY=medium
#if [ "$DEBCONF_RECONFIGURE" = 1 ] && [ -f /sbin/dhclient3 ]
if [ -f /sbin/dhclient3 ]
then
	DHCPPRIORITY=high
# TODO: see if we can detect that dhcp3-client is *going* to be installed,
# even if it isn't yet.
#elif dpkg-query -W --showformat='${Status}\n' dhcp3-client | grep ???
# unknown ok not-installed ? 
#	DHCPPRIORITY=high
fi

if [ ! -f $FILE ] || grep -q -i 'wins server' $FILE
then
	# check the values before and after; unset the 'applied' flag
	# if they don't match.
	db_get samba-common/dhcp || true
	OLDDHCP="$RET"
	db_input $DHCPPRIORITY samba-common/dhcp || true
	db_go
	db_get samba-common/dhcp || true
	if [ "$OLDDHCP" != "$RET" ]; then
		db_fset samba-common/dhcp applied false
	fi
fi
