#!/bin/sh

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 $1 anyway (y/n)? \c"
      read answer
      [ "$answer" = "${answer#[Yy]}" ] && exit 1
   fi
   LATEST_META=$(wget -qO - https://registry.npmjs.org/"$1"/latest)
   latest_vers=`sed -n 's/.*"version":"\([^"]*\).*/\1/p' <<< "$LATEST_META"`
   if [ "$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"