#!/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

obs-interlude() {
  p=$(cat /p/obs-ws-pass)
  if [[ -e /tmp/no-obs-auto-scene-switch ]]; then
    rm -f /tmp/no-obs-auto-scene-switch
    if [[ -s /tmp/last-obs-i3-mark ]]; then
      mark=$(cat /tmp/last-obs-i3-mark)
      obs-cmd -w obsws://localhost:4455/$p scene switch $mark
    fi
  else
    touch /tmp/no-obs-auto-scene-switch
    obs-cmd -w obsws://localhost:4455/$p scene switch interlude
  fi

}

ffmpeg-interlude() {
  f=/tmp/iank-ffmpeg-interlude-toggle

  # interlude off
  if [[ -e $f ]]; then

    rm -f $f
    # note: get _6 from looking for "parsed" ffmpeg debug output.
    zsend -b tcp://127.0.0.1:5557 Parsed_drawbox_6 t 0
    zsend -b tcp://127.0.0.1:5557 Parsed_drawtext_7 reinit "text=''"

  else

    # I started an attempt to track if I was muted before an interlude,
    # but decided against it. Seems easier to handle unmuting with
    # whatever normal process I have for it.
    #
    # muted=$(pactl get-source-mute @DEFAULT_SOURCE@ | awk '{print $2}')

    zsend Parsed_volume_1 volume 0
    zsend -b tcp://127.0.0.1:5557 Parsed_drawbox_6 t fill
    zsend -b tcp://127.0.0.1:5557 Parsed_drawtext_7 reinit "text='$(date "+%H\:%M %Z") - Be right back'"
    touch $f
  fi
}

zsend() {
  local out
  if [[ $1 == -b ]]; then
    zmq_args=("$1" "$2")
    shift 2
  fi
  out=$(printf "%s\n" "$*" | zmqsend ${zmq_args[@]} ||:)
  if [[ $out != "0 Success" ]]; then
    i3-nagbar -m "FAILED zmqsend: $*" -t error -f "pango:monospace 30"
  fi
}


if pgrep '^obs$' &>/dev/null; then
  obs-interlude
else
  ffmpeg-interlude
fi