#!/usr/bin/env bash

[ "$(whoami)" != "root" ] && echo "Error: installation only works as root!" >&2 && exit 1

API_ENDPOINT="https://git.ccc-rheintal.ch/api/v1/repos/spacefreak/pbc"

TMPDIR=''
function cleanup_tmpdir() {
  [ -n "$TMPDIR" -a -d "$TMPDIR" ] && rm -r "$TMPDIR"
  trap - EXIT
}

function download_files() {
  local path rc
  local query_params=''
  [ -n "$GIT_TAG" ] && query_params="?ref=$GIT_TAG"

  while [ -n "$1" ]; do
    path=$1
    shift
    curl -s --output-dir "$TMPDIR/" --remote-name "$API_ENDPOINT/raw/$path$query_params"
    rc=$?
    if (( $rc != 0 )); then
      return $rc
    fi
  done
}

GIT_TAG=$(curl -s "$API_ENDPOINT/tags" | jq -r '.[] | .name' | sort --version-sort | tail -n 1)
if [ -n "$GIT_TAG" ]; then
  echo "Info: installing pbc version $GIT_TAG"
else
  echo "Warning: no Git tag found, installing from repository default branch" >&2
fi

TMPDIR=$(mktemp -d)
trap cleanup_tmpdir EXIT

! download_files config.example pbc && echo "Error downloading files!" >&2 && exit 10
chmod +x "$TMPDIR/pbc"

"$TMPDIR/pbc" install
rc=$?
if (( $? != 0 )); then
  echo "Error installing pbc requirements!" >&2
  exit $rc
fi

! mv "$TMPDIR/pbc" /usr/local/bin/pbc && echo 'Error moving file!' >&2 && exit 20

echo "Success!"