#!/usr/bin/env bash

set -e

SSK_DIR="../SignalServiceKit/src"

pushd $SSK_DIR
CURRENT_SSK_BRANCH=$(git status|awk 'NR==1{print $3}')
if [ $CURRENT_SSK_BRANCH != "master" ]
then
  if [[ $* == *--non-master* ]]
  then
    echo "[!] Note - generating from non-master SSK."
  else
    echo "[!] Error - SSK must be on master to be sure we're generating up-to-date strings, or use '--non-master'."
    exit 1
  fi
fi
popd

TARGETS="Signal/src ${SSK_DIR}"
TMP="$(mktemp -d)"
STRINGFILE="Signal/translations/en.lproj/Localizable.strings"

BIN_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
REPO_ROOT=$BIN_DIR/../../..
cd $REPO_ROOT

for TARGET_DIR in $TARGETS
do

if [ ! -d $TARGET_DIR ]; then
  echo "Unable to find required directory: ${TARGET_DIR}."
  exit 1
fi

done

# Search directories for .m & .h files and collect string definitions with genstrings
find $TARGETS -name "*.m" -print0 -o -name "*.h" -print0 -o -name "*.swift" -print0 | xargs -0 genstrings -o $TMP

# We have to convert the new .strings files to UTF-8 in order to deal with them
# STRINGFILE is already UTF-8.
OLDUTF8=$(cat $STRINGFILE)
NEWUTF8=$(iconv -f UTF-16 -t UTF-8 $TMP/Localizable.strings)

# Let's merge the old with the new .strings file:
#	1. Select old string definition lines
#	2. Setup field separators
#	3. Read old string definitions as associative array
#	4. In new file, if possible, insert old definition
#	5. Add separator and semicolon only for string definition lines
#	6. Convert output back to UTF-16 to final location
echo "$OLDUTF8" | grep -Eo '^".*"' | \
	awk 'BEGIN {FS = "[ ]*=[ ]*"; OFS = ""} \
		NR == FNR {a[$1] = $2; next} \
		{$2 = ($1 in a ? a[$1] : $2); \
		if($2 ~ /"[;]*$/){$2 = " = "$2}; \
		if($2 ~ /"$/){$2 = $2";"}; \
		print}' - <(echo "$NEWUTF8") > $STRINGFILE