# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2018-present Team LibreELEC (https://libreelec.tv)

_get_file_already_downloaded() {
  [ ! -f "${PACKAGE}" -o ! -f "${STAMP_URL}" -o ! -f "${STAMP_SHA}" ] && return 1
  [ -n "${PKG_SHA256}" -a "$(cat ${STAMP_SHA} 2>/dev/null)" != "${PKG_SHA256}" ] && return 1
  return 0
}

# Latest file already present, exit now...
_get_file_already_downloaded && exit 0

lock_source_dir "${1}"

# Check again in case of concurrent access - if nothing needs to be downloaded, exit now...
_get_file_already_downloaded && exit 0

# At this point, we need to download something...
build_msg "CLR_GET" "GET" "${1} (archive)" "indent"

PACKAGE_MIRROR="${DISTRO_MIRROR}/${PKG_NAME}/${PKG_SOURCE_NAME}"
[ "${VERBOSE}" != "yes" ] && WGET_OPT=-q
WGET_CMD="wget --output-file=- --timeout=30 --tries=3 --passive-ftp --no-check-certificate -c ${WGET_OPT} --progress=bar:force --show-progress -O ${PACKAGE}"

# unset LD_LIBRARY_PATH to stop wget from using toolchain/lib and loading libssl.so/libcrypto.so instead of host libraries
unset LD_LIBRARY_PATH

rm -f "${STAMP_URL}" "${STAMP_SHA}"

NBWGET=10
while [ ${NBWGET} -gt 0 ]; do
  for url in "${PKG_URL}" "${PACKAGE_MIRROR}"; do
    rm -f "${PACKAGE}"
    if ${WGET_CMD} "${url}"; then
      CALC_SHA256=$(sha256sum "${PACKAGE}" | cut -d" " -f1)

      [ -z "${PKG_SHA256}" -o "${PKG_SHA256}" = "${CALC_SHA256}" ] && break 2

      build_msg "CLR_WARNING" "WARNING" "Incorrect checksum calculated on downloaded file: got ${CALC_SHA256} wanted ${PKG_SHA256}"
    fi
  done
  NBWGET=$((NBWGET - 1))
done

if [ ${NBWGET} -eq 0 ]; then
  die "\nCant't get ${1} sources : ${PKG_URL}\nTry later!"
else
  build_msg "CLR_INFO" "INFO" "Calculated checksum: ${CALC_SHA256}"
  echo "${PKG_URL}" > "${STAMP_URL}"
  echo "${CALC_SHA256}" > "${STAMP_SHA}"
fi
