#!/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 change
# to a recommended GPL license.

# 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.


if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR


mute=true
volume_level=0

# mute / unmute instead of toggle.
if [[ $1 ]]; then
  case $1 in
    mute)
      mute=true
      ;;
    unmute)
      mute=false
      ;;
  esac
else

  muted=$(pactl get-source-mute @DEFAULT_SOURCE@ | awk '{print $2}' ||:)
  case $muted in
    no) : ;;
    yes) mute=false; volume_level=1 ;;
    *)
      i3-nagbar -m "FAILED TO GET PULSE MUTE STATE" -t error -f "pango:monospace 30"
      ;;
  esac
fi

# we double mute here because it could be useful, and I figured out how
# and feel like using what I know.

pactl set-source-mute @DEFAULT_SOURCE@ $mute

# note: condition duplicated in stream-clip, myi3statsus
if pgrep -fc '^ffmpeg.*icecast://source.*/fsf' >/dev/null; then
  out=$(echo Parsed_volume_1 volume $volume_level | zmqsend ||:)
  if [[ $out != "0 Success" ]]; then
    i3-nagbar -m "FAILED to set ffmpeg volume to $volume_level" -t error -f "pango:monospace 30"
  fi
fi