#!/bin/sh

# Make sure the user has a sufficiently recent version of mono on the PATH
MINIMUM_MONO_VERSION="4.2"

make_version() {
  echo "$1" | tr '.' '\n' | head -n 4 | xargs printf "%03d%03d%03d%03d";
}

mono_missing_or_old() {
  command -v mono >/dev/null 2>&1 || return 0
  MONO_VERSION=$(mono --version | head -n1 | cut -d' ' -f5)
  [ "$(make_version "${MONO_VERSION}")" -lt "$(make_version "${MINIMUM_MONO_VERSION}")" ] && return 0
  return 1
}

if mono_missing_or_old; then
  ERROR_MESSAGE="{MODNAME} requires Mono ${MINIMUM_MONO_VERSION} or greater.\nPlease install Mono using your system package manager."
  if command -v zenity > /dev/null; then
    zenity --no-wrap --error --title "{MODNAME}" --text "${ERROR_MESSAGE}" 2> /dev/null
  elif command -v kdialog > /dev/null; then
    kdialog --title "{MODNAME}" --error "${ERROR_MESSAGE}"
  else
    printf "${ERROR_MESSAGE}"
  fi
  exit 1
fi

# Some distros and self-compiled mono installations don't set up
# the SSL required for http web queries. If we detect that these
# are missing we can try and create a local sync as a fallback.
if [ ! -d "/usr/share/.mono/certs" ] && [ ! -d "~/.config/.mono/certs" ]; then
  if [ -f "/etc/pki/tls/certs/ca-bundle.crt" ]; then
    cert-sync --quiet --user /etc/pki/tls/certs/ca-bundle.crt
  elif [ -f "/etc/ssl/certs/ca-certificates.crt" ]; then
    cert-sync --quiet --user /etc/ssl/certs/ca-certificates.crt
  fi
fi

# Run the game or server
HERE="$(dirname "$(readlink -f "${0}")")"
export PATH="${HERE}"/usr/bin/:"${PATH}"
export XDG_DATA_DIRS="${HERE}"/usr/share/:"${XDG_DATA_DIRS}"

if [ -n "$1" ] && [ "$1" = "--server" ]; then
  exec "openra-{MODID}-server" "$@"
else
  exec "openra-{MODID}" "$@"
fi