#!/bin/sh

set -e
data_files="UnicodeData.txt CaseFolding.txt EastAsianWidth.txt"
emoji_files="emoji-data.txt"
files="'$data_files $emoji_files'"

UNIDIR_DEFAULT=src/unicode
DOWNLOAD_URL_BASE_DEFAULT='http://unicode.org/Public'

if test "$1" = '--help' ; then
  echo 'Usage:'
  echo "  $0[ TARGET_DIRECTORY[ URL_BASE]]"
  echo
  echo "Downloads files $files to TARGET_DIRECTORY."
  echo "Each file is downloaded from URL_BASE/\$filename."
  echo
  echo "Default target directory is $PWD/${UNIDIR_DEFAULT}."
  echo "Default URL base is ${DOWNLOAD_URL_BASE_DEFAULT}."
  exit 0
fi

UNIDIR=${1:-$UNIDIR_DEFAULT}
DOWNLOAD_URL_BASE=${2:-$DOWNLOAD_URL_BASE_DEFAULT}

for filename in $data_files ; do
  curl -L -o "$UNIDIR/$filename" "$DOWNLOAD_URL_BASE/UNIDATA/$filename"
  git -C "$UNIDIR" add "$filename"
done

for filename in $emoji_files ; do
  curl -L -o "$UNIDIR/$filename" "$DOWNLOAD_URL_BASE/UNIDATA/emoji/$filename"
  git -C "$UNIDIR" add "$filename"
done

git -C "$UNIDIR" commit -m "feat: update unicode tables" .