#!/bin/sh

#
# Copyright (C) 2019  Josh Habdas <jhabdas@protonmail.com>
#
# This file is part of After Dark.
#
# After Dark is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# After Dark is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

stop_help_server () {
   echo "Stopping help server if running ..."
   kill "$(ps aux | awk '/[h]ugo.*1414/ {print $2}')" 2>/dev/null || true
}

generate_help_docs () {
   stop_help_server
   echo "Generating help documentation ..."
   THEME_PATH=themes/after-dark
   meta_path="$THEME_PATH"/data/npm
   mkdir -p "$meta_path" && echo "$LATEST_META" | tr '\r\n' ' ' > "$meta_path"/latest.json
   cd "$THEME_PATH"/docs && mkdir themes && ln -s ../.. "$THEME_PATH"
   hugo new validate.md --kind validate 1>/dev/null
}

update_module () {
   meta_file=themes/"$1"/data/npm/latest.json
   if [ -f "$meta_file" ] ; then
      current_vers=$(sed -n 's/.*"version":"\([^"]*\).*/\1/p' < "$meta_file")
   else
      echo "Cannot detect version. Upgrade $1 anyway (y/n)? \c"
      read -r answer
      [ "$answer" = "${answer#[Yy]}" ] && exit 1
   fi
   LATEST_META=$(wget -qO - https://registry.npmjs.org/"$1"/latest)
   latest_vers=$(echo "$LATEST_META" | grep -oE "\"version\".*[^,]*," | cut -d ',' -f1 | cut -d ':' -f2 | tr -d '" ')
   if [ "$current_vers" ] ; then
      if [ "$current_vers" = "$latest_vers" ] ; then
         echo "Did not upgrade $1. Already using latest version." >&1; exit 0
      else
         echo "Upgrading $1 from $current_vers to $latest_vers ..."
      fi
   else
      echo "Upgrading $1 from unknown version to $latest_vers ..."
   fi
   rm -rf themes/"$1"/* # maintains dotfiles, e.g. git and env
   wget -qO - https://registry.npmjs.org/"$1"/-/"$1"-"$latest_vers".tgz | tar --strip-components=1 -xz -C themes/"$1"
   echo "Version $latest_vers downloaded to themes/$1"
   [ "$1" = "after-dark" ] && generate_help_docs
   echo "Upgrade complete! Please see CHANGELOG.md for changes."
}

set -e

update_module "after-dark"