#!/bin/bash

#----------------------------------------------------------------------------------------------------
#~ Name         : pushover
#~ Description  : Send notification to pushover
#~ Author       : Etienne Girault <etienne.girault@gmail.com>
#~
#~ Usage        : [-h] [-D] [-V]
#~ Usage        : [-a <application>]
#~ Usage        : -t <titre>
#~ Usage        : -m <message>
#~
#~ Options      : -h, --help ; Affiche l'aide
#~ Options      : -V, --version ; Affiche la version
#~ Options      : -D, --debug ; Mode debug
#~ Options      : -a, --application ; Nom de l'application
#~ Options      : -m, --message ; Message de la notification
#~ Options      : -t, --title ; Titre de la notification
#~ Options      : -p, --priority ; Priorité de la notification (-2, -1, 0 ou 1)
#~ Options      : -s, --sound ; Choix du son de la notification
#~ Options      : -d, --dry-run ; N'envoie pas la notification et la simule en sortie

#----------------------------------------------------------------------------------------------------
# Variables
#----------------------------------------------------------------------------------------------------
script_name="$(grep '^#~ Nom' "$0" | sed 's/^.*: //')"
script_version="$(grep '^#~ v' "$0" | tail -1 | sed -e 's/^#~ //' -e 's/ *\-.*$//')"

keyfile=keys

#----------------------------------------------------------------------------------------------------
# Functions
#----------------------------------------------------------------------------------------------------
print_script_name_version() { echo "$script_name $script_version" && sed -n '/^#~ Version/,$p' "$0" | grep '^#~' | sed 's/^#~ //'; }
print_script_description() { grep '^#~ Description' "$0" | sed 's/^.*: //'; }
print_script_usage() { grep '^#~ Usage' "$0" | sed -e 's/^.*: //' -e '1 s/^/Usage: '"$script_name"' /' -e '2,$ s/^/'"$(printf '%*s' "$(echo "Usage: $script_name" | wc -c)")"'/'; }
print_script_options() { echo "Options" &&  grep '^#~ Options' "$0" | sed -e 's/^.*://' -e 's/^ --/     --/' | column -ts \;; }
print_script_help() { echo "$script_name $script_version"  && print_script_description && print_script_usage && print_script_options; }

send_notification() {
  curl --silent \
       -F "token=$apptoken" \
       -F "user=$user_key" \
       -F "title=$title" \
       -F "message=$message" \
https://api.pushover.net/1/messages > /dev/null

     # -F "sound=$sound" \
     # -F "$priorityString" \
}

load_keys() {
  [[ $user_key ]] && save_user_key=$user_key
  [[ $apptoken ]] && save_apptoken=$apptoken
  if [[ -f "$keyfile" ]]; then
    . "$keyfile"
  else
    if [[ $apptoken == "" ]]; then
      echo "unable to load key file"
      exit 1
    fi
  fi
  [[ $save_user_key ]] && user_key=$save_user_key
  [[ $save_apptoken ]] && apptoken=$save_apptoken
}


choose_app() {
  apptoken=$(eval echo \$apptoken_$1)
  if [[ $apptoken == "" ]]; then
    return 1
  fi
}

simulate () {
  echo "Application:   $application"
  echo "Title:         $title"
  echo "Message:       $message"
  exit 
}

# Signals
trap 'exit 1' INT TERM

#----------------------------------------------------------------------------------------------------
# Options
#----------------------------------------------------------------------------------------------------
while getopts ":-:hVDf:a:m:t:p:s:d" OPTION; do
  case $OPTION in
    h)  print_script_help; exit;;
    V)  print_script_name_version; exit;;
    D)  set -x;;
    f)  keyfile="$OPTARG";;
    a)  application="$OPTARG";;
    m)  message="$OPTARG";;
    t)  title="$OPTARG";;
    d)  mode_simulation=0;;
    :)  ;;
    -)  case $OPTARG in
          help) print_script_help; exit;;
          version)  print_script_name_version; exit;;
          debug)  set -x;;
          application) token="";;                               # TODO
          message) message="";;                                 # TODO
          title) title="";;                                     # TODO
        esac ;;
    *)  ;;
  esac
done
shift $((OPTIND-1))

#----------------------------------------------------------------------------------------------------
# Start
#----------------------------------------------------------------------------------------------------

load_keys

[[ $apptoken ]] || choose_app "${application:=$(hostname -s)}"

[[ "$mode_simulation" ]] && simulate

send_notification


#----------------------------------------------------------------------------------------------------
# End
#----------------------------------------------------------------------------------------------------

#~ Version changelog
#~ v0.1     - Script creation
#~ v0.2     - Added chose app
#~ v0.3     - Added simulation
#~ v0.4     - Reworked how to get the apptoken
#~ v0.5     - Added load keys
#~ v0.5.1   - Load keys can now read from env
#~ v0.5.2   - Bug fix whith apptoken from env