#!/bin/bash
# Auto-route iPhone HFP calls (the nodes exist only during a call):
#   uplink (what far-end hears)  <- micgate.out  (GATED mic only -> no self-echo)
#   far-end voice (bluez_input)  -> callmix       (recorded digitally, clean)
# and remove WirePlumber's default callrec_mix->uplink auto-link (that mix carried
# the ungated mic which picks up the far-end acoustically = echo).
export XDG_RUNTIME_DIR=/run/user/1000
MAC=B4_96_A5_42_BD_D6
PL(){ pw-link "$@" 2>/dev/null; }
while true; do
  # uplink sink node (has input_FL) present = a call is up
  UPPORT=$(pw-link -i 2>/dev/null | grep -m1 "bluez_output\.${MAC}.*:input_FL")
  if [ -n "$UPPORT" ]; then
    B=${UPPORT%%:*}
    I=$(pw-link -o 2>/dev/null | grep -m1 "bluez_input\.${MAC}.*:output_FL"); I=${I%%:*}
    if ! pw-link -l "$B" 2>/dev/null | grep -q micgate.out; then
      PL -d callrec_mix:capture_FL "$B:input_FL"; PL -d callrec_mix:capture_FR "$B:input_FR"
      PL micgate.out:output_FL "$B:input_FL"; PL micgate.out:output_FR "$B:input_FR"
      [ -n "$I" ] && { PL "$I:output_FL" callmix:playback_FL; PL "$I:output_FR" callmix:playback_FR; }
      logger -t aime-iphone-route "applied iPhone call routing ($B)"
    fi
  fi
  sleep 2
done