#!/bin/bash
# I, Ian Kelling, follow the GNU license recommendations at
# https://www.gnu.org/licenses/license-recommendations.en.html. They
# recommend that small programs, < 300 lines, be licensed under the
# Apache License 2.0. This file contains or is part of one or more small
# programs. If a small program grows beyond 300 lines, I plan to switch
# its license to GPL.

# Copyright 2024 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


set -e; . /usr/local/lib/bash-bear; set +e

try() {
  "$@" || printf "warning: failed %s\n" "$*"
}

while true; do
  while read -r line ; do
    mark=$(printf "%s\n" "$line" | jq -r 'select (.change == "focus") | .container.marks[0]') ||:
    if [[ $mark && $mark != null ]]; then
      echo $mark > /tmp/last-obs-i3-mark
      if [[ ! -e /tmp/no-obs-auto-scene-switch ]]; then
        p=$(cat /p/obs-ws-pass)
        try obs-cmd -w obsws://localhost:4455/$p scene switch $mark
      fi
    fi
    # debugging
    #printf "%s\n" "$line" | jq


    # intentional process substitution to properly exit on kill
    # ||: avoids error messages
  done < <(i3-msg -t subscribe -m '[ "window" ]' ||:)
  sleep 5
done