# wait until pw-link port becomes available
# $1: port identifier
wait_for_port() {
  for _ in $(seq 1 10); do
    if pw-link -io 2>/dev/null | grep -Fq "$1"; then
      return 0
    fi
    sleep 1
  done
  echo "Timed out waiting for PipeWire port: $1" >&2
  return 1
}

# link two pipewire ports together. waits for htme to exist first.
# $1: output port
# $2: input port
link_ports() {
  wait_for_port "$1"
  wait_for_port "$2"

  # pw-link errors if a link already exists, but we don't want that to fail the script
  pw-link "$1" "$2" 2>/dev/null || true
}

# link clementine -> combine
link_ports "clementine:monitor_FL" "combine:playback_FL"
link_ports "clementine:monitor_FR" "combine:playback_FR"

# link element -> combine
link_ports "element:monitor_FL" "combine:playback_FL"
link_ports "element:monitor_FR" "combine:playback_FR"

# link game -> combine
link_ports "game:monitor_FL" "combine:playback_FL"
link_ports "game:monitor_FR" "combine:playback_FR"

# link combine -> usb_c_sink
link_ports "combine:monitor_FL" "$USB_C_SINK:playback_FL"
link_ports "combine:monitor_FR" "$USB_C_SINK:playback_FR"