#!/bin/bash
#
# script to fetch language files
#
OUTPUT_DIR=simutrans/text

# Parse input and provide basic help text.
OUTPUT_DIR="${1-${OUTPUT_DIR}}"
if [ $# -eq 0 ]; then
    echo "Getting translations for default location: $(pwd -P)/${OUTPUT_DIR}"
elif [ "${1}" = '-h' ] || [ "${1}" = '--help' ]; then
    echo "Usage"
    echo "====="
    echo "Download and extract to default location (relative to script):"
    echo "  $0"
    echo "Download and extract to a user defined location:"
    echo "  $0 output_path"
    echo
    echo "Note:"
    echo " If downloading into an existing simutrans installation make sure the path ends with: '/text'."
    exit 1
elif [ ! -e "${1}" ]; then
    echo "ERROR: User defined location (${OUTPUT_DIR}) does not exist."
    exit 1
else
    echo "Getting translations for user defined location: ${OUTPUT_DIR}"
fi

# get the translations for basis
# The first file is longer, but only because it contains SQL error messages
# - discard it after complete download (although parsing it would give us the archive's name):
#
# Use curl if available, else use wget
curl -q -h > /dev/null
if [ $? -eq 0 ]; then
    curl -q -L -d "version=0&choice=all&submit=Export%21" https://translator.simutrans.com/script/main.php?page=wrap > /dev/null || {
      echo "Error: generating file language_pack-Base+texts.zip failed (curl returned $?)" >&2;
      exit 3;
    }
    curl -q -L https://translator.simutrans.com/data/tab/language_pack-Base+texts.zip > language_pack-Base+texts.zip || {
      echo "Error: download of file language_pack-Base+texts.zip failed (curl returned $?)" >&2
      rm -f "language_pack-Base+texts.zip"
      exit 4
    }
else
    wget -q --help > /dev/null
    if [ $? -eq 0 ]; then
        wget -q --post-data "version=0&choice=all&submit=Export!"  --delete-after https://translator.simutrans.com/script/main.php?page=wrap || {
          echo "Error: generating file language_pack-Base+texts.zip failed (wget returned $?)" >&2;
          exit 3;
        }
        wget -q -N https://translator.simutrans.com/data/tab/language_pack-Base+texts.zip || {
          echo "Error: download of file language_pack-Base+texts.zip failed (wget returned $?)" >&2
          rm -f "language_pack-Base+texts.zip"
          exit 4
        }
    else
        echo "Error: Neither curl or wget are available on your system, please install either and try again!" >&2
        exit 6
    fi
fi
unzip -otv "language_pack-Base+texts.zip" -d "${OUTPUT_DIR}" || {
   echo "Error: file language_pack-Base+texts.zip seems to be defective" >&2
   rm -f "language_pack-Base+texts.zip"
   exit 5
}
unzip -o "language_pack-Base+texts.zip" -d "${OUTPUT_DIR}"
rm language_pack-Base+texts.zip
# remove Chris English (may become simple English ... )
rm -f "${OUTPUT_DIR}/ce.tab"
# Remove check test
#rm xx.tab
#rm -rf xx