#!/bin/bash
#
# Author  : Gaston Gonzalez
# Date    : 5 November 2024
# Purpose : Wrapper script for starting ARDOP
#
# Preconditions:
# 1. Supported radio and audio interface are connected and properly detected
#
# Postconditions:
# 1. Audio settings updated
# 2. ARDOP modem started
#
# Assumptions:
# 1. The application using the ARDOP modem is responsible for keying the PTT.

ARDOP_PORT=8515

# 1. Check if the symlink was created by the udev rules
if [ -e /dev/et-audio ]; then

   # 2. Check that this device was properly tagged with the ET_AUDIO env variable with a udev rule
   APLAY_OUT=$(arecord -l | grep ET_AUDIO)
   if [ $? -eq 0 ]; then
     AUDIO_CARD=$(echo $APLAY_OUT | cut -d":" -f1 | awk '{print $2}')
     AUDIO_DEVICE=$(echo $APLAY_OUT | cut -d"," -f2 | cut -d":" -f1 | awk '{print $2}')
     ARDOP_AUDIO_DEVICE="plughw:${AUDIO_CARD},${AUDIO_DEVICE}"

     # 3. Update audio device
     et-log "Using '${ARDOP_AUDIO_DEVICE}' as audio device for ARDOP."

     # 4. Configure ALSA settings for sound card
     /opt/emcomm-tools/bin/et-audio update-config

   else
     et-log "Can't start ARDOP modem. No ET_AUDIO device detected."
     exit 1
   fi
else
  et-log "No ET_AUDIO device plugged in. No supported audio device plugged it."
  exit 1
fi

CMD="ardopcf ${ARDOP_PORT} ${ARDOP_AUDIO_DEVICE} ${ARDOP_AUDIO_DEVICE}"
et-log "Starting ARDOP with: '${CMD}'"
${CMD}