#!/bin/bash

# don't do anything if ADTPro is already running
if [[ $(ps aux | grep [A]DTPro) ]]; then
    
    1&>2 echo "ADTPro server is already running."
    
else

    # look for eligible USB-to-serial adapter
    ttyUSB=
    # if lower USB port
    if [[ -c /dev/ttyUSBlower ]]; then
        ttyUSB=ttyUSBlower
    # if hub in lower port, use lowest numbered port on hub
    elif [[ $(ls -1 /dev/ttyUSBlower_hub* 2> /dev/null | wc -l) -gt 0 ]]; then
        ttyUSB=$(ls -1 /dev/ttyUSBlower_hub* 2> /dev/null | head -1 | cut -c 6-)
    # if hub in upper port with multiple adapters, use lowest numbered port on hub
    elif [[ $(ls -1 /dev/ttyUSBupper_hub* 2> /dev/null | wc -l) -gt 1 ]]; then
        ttyUSB=$(ls -1 /dev/ttyUSBupper_hub* 2> /dev/null | head -1 | cut -c 6-)
    fi
    
    if [[ $ttyUSB ]]; then
        echo -n "Please wait..."
        sudo nohup adtpro.sh headless serial &> /dev/null
        echo "ok."
    else
        1>&2 echo "No USB-to-serial adapter found in the lower USB port, or"
        1>&2 echo "  a hub on the lower USB port, or the lowest-numbered port"
        1>&2 echo "  of a hub on the upper USB port. Not starting ADTPro server."
    fi

fi