#! /bin/bash

set -o errexit
shopt -s nullglob

if test "$1" = "--help" ; then
    echo "Upstream translation update tool works in top directory of unpacked source code."
    echo "Usage: $0 [translation_directory] [translation_domain] [command to create pot file]"
fi

# Update all known mechanisms to add language:
function linguas_update {
	if test -f LINGUAS -o -f ../po/LINGUAS ; then
	    if test -f LINGUAS ; then
		if sed '/^#/d' <LINGUAS | grep -q '[a-zA-Z0-9] [a-z]' ; then
		    echo "Adding $LNG to LINGUAS in to a list in single-line list mode."
		    sed -i "s/^[^#].* [a-z].*\$/& $LNG/" LINGUAS
		else
		    echo "Adding $LNG to LINGUAS."
		    echo $LNG >>LINGUAS
		fi
	    else
		echo "Not adding $LNG to LINGUAS - secondary domain, global LINGUAS."
	    fi
	else
	    if test -f $OLDPWD/configure.ac ; then
		if grep -q 'ALL_LINGUAS=' $OLDPWD/configure.ac ; then
		    echo "Adding $LNG to configure.ac."
		    sed -i 's/ALL_LINGUAS="/&'$LNG' /;s/\(ALL_LINGUAS=\)\([^"]\|$\)/\1"'$LNG' "\2/' $OLDPWD/configure.ac
		fi
	    fi
	    if test -f $OLDPWD/configure.in ; then
		if grep -q 'ALL_LINGUAS=' $OLDPWD/configure.in ; then
		    echo "Adding $LNG to configure.in."
		    sed -i 's/ALL_LINGUAS="/&'$LNG' /;s/\(ALL_LINGUAS=\)\([^"]\|$\)/\1"'$LNG' "\2/' $OLDPWD/configure.in
		fi
	    fi
	    if test -f $OLDPWD/configure ; then
		if grep -q 'ALL_LINGUAS=' $OLDPWD/configure ; then
		    echo "Adding $LNG to configure."
		    sed -i 's/ALL_LINGUAS="/&'$LNG' /;s/\(ALL_LINGUAS=\)\([^"]\|$\)/\1"'$LNG' "\2/' $OLDPWD/configure
		fi
	    fi
	fi
}

DIR=${1:-po}
DOMAIN=$2

cd $DIR

if test -z "$3" ; then
    if test -z "$DOMAIN" ; then
	intltool-update --pot
    else
	intltool-update --gettext-package=$DOMAIN --pot
    fi
else
    eval $3
fi

POT_NOT_UNIQUE=false
NO_POT=true
for POT in *.pot ; do
    MISSING=true
    if $POT_NOT_UNIQUE ; then
	echo "ERROR: Directory $DIR contains more than one .pot file."
	exit 1
    fi
    POT_NOT_UNIQUE=true
    DOMAIN=${POT%.pot}

    # STRING_COLLECT_MODE is a special mode used during string
    # collection. STRING_COLLECT_DIR must be set as well.
    if test "$STRING_COLLECT_MODE" = 1 ; then
	mkdir $STRING_COLLECT_DIR/$DOMAIN
	cp -a $POT $STRING_COLLECT_DIR/$DOMAIN
	cp -a *.po $STRING_COLLECT_DIR/$DOMAIN
    else
	if test -d @DATADIR@/translation-update-upstream ; then
	    if test -d @DATADIR@/translation-update-upstream/po/$DOMAIN ; then
		for PO_PATH in @DATADIR@/translation-update-upstream/po/$DOMAIN/*.po ; do
		    PO=${PO_PATH##*/}
		    LNG=${PO%.po}
		    if test -f $PO ; then
		    	if test "$SKIP_TUU" = true ; then
				echo "SKIP_TUU is set. Skipping update of $PO."
				continue
			fi
			echo "Updating $PO using translation-update-upstream."
			echo "(You can skip update by setting environment variable SKIP_TUU=true.)"
			# PO_PATH is first: Update any string, even if it was already translated.
			# Swap $PO_PATH and $PO to disable this behavior.
			msgcat --use-first $PO_PATH $PO -o $PO.new
			# Return .po file notes that are not present in the update file.
			msgmerge --no-fuzzy-matching --compendium=$PO_PATH -o $PO.new2 $PO.new $POT
			# And finally, synthesize header that not change every time.
			if @LIBEXECDIR@/translation-update-upstream/msgheadermerge $PO $PO.new2 $PO.header --mergemode ; then
			    msgcat --use-first $PO.header $PO.new2 -o $PO
			    rm $PO.new $PO.new2 $PO.header
			else
			    rm $PO.new $PO.new2
			    echo "WARNING: Update of $PO for $DOMAIN is older than data in package. Skipping."
			fi
		    else
			echo "Adding $PO from translation-update-upstream."
			cp -a $PO_PATH $PO
			linguas_update
		    fi
		done
		MISSING=false
	    fi
	    if test -d @DATADIR@/translation-update-upstream/po-mandatory/$DOMAIN ; then
		for PO_PATH in @DATADIR@/translation-update-upstream/po-mandatory/$DOMAIN/*.po ; do
		    PO=${PO_PATH##*/}
		    LNG=${PO%.po}
		    if test -f $PO ; then
			if test "$SKIP_TUU" = true ; then
				echo "SKIP_TUU is set. Skipping update of $PO."
				continue
			fi
			echo "Updating $PO using translation-update-upstream mandatory source."
			echo "(You can skip update by setting environment variable SKIP_TUU=true.)"
			# PO_PATH is first: Update any string, even if it was already translated.
			# Swap $PO_PATH and $PO to disable this behavior.
			msgcat --use-first $PO_PATH $PO -o $PO.new
			# Return .po file notes that are not present in the update file.
			msgmerge --no-fuzzy-matching --compendium=$PO_PATH -o $PO.new2 $PO.new $POT
			# And finally, synthesize header that not change every time.
			if ! @LIBEXECDIR@/translation-update-upstream/msgheadermerge $PO $PO.new2 $PO.header --mergemode --continue ; then
			    echo "WARNING: Mandatory update of $PO for $DOMAIN is older than data in package or upstream snapshot. Using anyway!"
			fi
			msgcat --use-first $PO.header $PO.new2 -o $PO
			rm $PO.new $PO.new2 $PO.header
		    else
			echo "Adding $PO from translation-update-upstream mandatory source."
			cp -a $PO_PATH $PO
			linguas_update
		    fi
		done
		MISSING=false
	    fi
	    if $MISSING ; then
		echo "WARNING: Missing $DOMAIN in translation-update-upstream configuration! No updates available."
	    fi
	else
	    echo "ERROR: Package translation-update-upstream is not installed. Please update your BuildRequires!"
	    exit 1
	fi
    fi
    NO_POT=false
done
if $NO_POT ; then
    echo "ERROR: Pot file was not created. Please fix or set command line arguments properly!"
    exit 1
fi