#!/bin/bash
#
# Author   : Gaston Gonzalez
# Date     : 1 January 2025
# Purpose  : Utility for accessing the Bluetooth TNC on the BTECH
#            UV Pro.           

# TODO: read from file
CONF_FILE="${HOME}/.config/emcomm-tools/btech-uv-pro.json"
MAC="38:D2:00:00:ED:C8"

BT_DEVICE="/dev/rfcomm0"
AX25_PORT="pkt1200"
AX25_CONF_FILE="/etc/ax25/axports"

RED='\x1B[1;31m'
BLUE='\x1B[1;34m'
CYAN='\x1B[1;36m'
GREEN='\x1B[1;32m'
YELLOW='\x1B[1;33m'
NC='\x1B[0m'

function usage() {
  echo "Usage: $(basename $0) <command>"
  echo "  connect - Connect to radio via Bluetooth" 
  echo "  pair    - Pair radio via Bluetooth" 
  echo "  unpair  - Unpair radio via Bluetooth" 
}

if [ $# -ne 1 ]; then
  usage
  exit 1
fi

update_ax25_conf() {

    [ -z "$ET_USER_CONFIG" ] && ET_USER_CONFIG="${HOME}/.config/emcomm-tools/user.json"

    CALLSIGN=$(cat ${ET_USER_CONFIG} | jq -r .callsign)

    if [ "${CALLSIGN}" = "N0CALL" ]; then
      echo -e "${RED}No callsign set. Run et-user first.${NC}"
      exit 1
    fi

  GREP_OUT=$(grep ${AX25_PORT} ${AX25_CONF_FILE})
  if [ $? -eq 0 ]; then
    # Delete all existing pkt1200 entries. Note: we can't use sed here
    # since we do not have permission to create a temporary file with
    # inline replacement. ed modifies the file directly.
    printf "g/^pkt1200/d\nw\nq\n" | ed ${AX25_CONF_FILE} > /dev/null 2>&1

  fi

  echo -e "${BLUE}Adding AX25 port for ${CALLSIGN}${NC}"
  echo "pkt1200 ${CALLSIGN} 1200 255	2 1200 Packet" >> ${AX25_CONF_FILE}
}

stop_all_services() {

  PS_OUT=$(ps -ef | grep [k]issattach) 
  if [ $? -eq 0 ]; then
    echo -e "${BLUE}Killing kissattach process(es)...${NC}"
    sudo killall kissattach
  fi
 
  sleep 3

  PS_OUT=$(ps -ef | grep [r]fcomm) 
  if [ $? -eq 0 ]; then
    echo -e "${BLUE}Killing rfcomm process(es)...${NC}"
    sudo killall rfcomm
  fi

}

case $1 in
  connect)
    echo -e "${YELLOW}"
    echo -e "1. Turn on the BTECH UV PRO"
    echo -e "2. Menu > General Settings > KISS TNC = checked"
    read -p "3. Press [ENTER] when done."

    is_paired=$(bluetoothctl info ${MAC} | grep "Paired" | awk '{print $2}')
    if [ "${is_paired}" != "yes" ]; then
    echo -e "${RED}"
      et-log "UV Pro is not paired. Run: '$(basename $0) pair'"
      echo -e "${NC}"
      exit 1
    fi  
 
    echo -e "${GREEN}Found UV Pro with MAC address: ${MAC}" 
    stop_all_services

    update_ax25_conf 

    echo -e "${BLUE}Connecting to radio..." 
    sudo rfcomm connect /dev/rfcomm0 ${MAC} 1>/dev/null 2>&1 &

    sleep 10 && reset

    if [ -e /dev/rfcomm0 ]; then
      echo -e "${GREEN}UV Pro connected via Bluetooth serial${NC}" 
    else
      echo -e "${RED}UV Pro failed to connect via Bluetooth serial${NC}"
      exit 1
    fi

    echo -e "${BLUE}Connecting KISS interface using ${BT_DEVICE} and AX.25 port: ${AX25_PORT}${NC}"
    KISS_OUT=$(sudo kissattach ${BT_DEVICE} ${AX25_PORT})
    
    if [ $? -eq 0 ]; then
      echo -e "${GREEN}Packet port ready"
    else 
      echo -e "${RED}Failed to setup radio for packet.${NC}"
      exit 1
    fi

    KISS_OUT=$(sudo kissparms -c 1 -p ${AX25_PORT})

    echo -e "${YELLOW}"
    echo -e "SAMPLE COMMANDS                  DESCRIPTION                     "
    echo -e "-------------------------------  --------------------------------"
    echo -e "axcall pkt1200 <STATION>         Connect directly to a node      "
    echo -e "axcall pkt1200 <STATION> <DIGI>  Connect to node via a digipeater"
    echo -e "${NC}"

    ;;
  *)
    et-log "Invalid command."
    usage
    exit 1
  ;;
esac