#!/bin/bash

# kill qbittorrent (required due to the fact qbittorrent cannot cope with dynamic changes to port)
if [[ "${qbittorrent_running}" == "true" ]]; then

    # note its not currently possible to change port and/or ip address whilst running, thus the sigterm
    echo "[info] Sending SIGTERM (-15) to 'tmux: server' (will terminate qbittorrent) due to port/ip change..."

    # SIGTERM used here as SIGINT does not kill the process
    pkill -SIGTERM "tmux\: server"

    # make sure 'qbittorrent main' process DOESNT exist before re-starting
    while pgrep -x "qbittorrent main" &> /dev/null
    do

        sleep 0.5s

    done

fi

echo "[info] Removing any qBittorrent session lock files left over from the previous run..."
rm -f /config/qbittorrent/session/*.lock

echo "[info] Attempting to start qBittorrent..."

if [[ "${VPN_ENABLED}" == "yes" ]]; then

	if [[ "${VPN_PROV}" == "pia" && -n "${VPN_INCOMING_PORT}" ]]; then

        /usr/bin/qbittorrent-nox --daemon --webui-port=8080 --profile=/config/qbittorrent 
        # webui is on port http://localhost:8080 username admin, password adminadmin

		# run tmux attached to qBittorrent (daemonized, non-blocking), specifying listening interface and port
		/usr/bin/script /home/nobody/typescript --command "/usr/bin/tmux new-session -d -s rt -n qbittorrent /usr/bin/qbittorrent -b ${vpn_ip} -p ${VPN_INCOMING_PORT}-${VPN_INCOMING_PORT} -o ip=${external_ip} -o dht_port=${VPN_INCOMING_PORT}"

		# set qbittorrent port to current vpn port (used when checking for changes on next run)
		qbittorrent_port="${VPN_INCOMING_PORT}"

	else

		# run tmux attached to qBittorrent (daemonized, non-blocking), specifying listening interface
		/usr/bin/script /home/nobody/typescript --command "/usr/bin/tmux new-session -d -s rt -n qbittorrent /usr/bin/qbittorrent -b ${vpn_ip} -o ip=${external_ip}"

	fi

	# set qbittorrent ip to current vpn ip (used when checking for changes on next run)
	qbittorrent_ip="${vpn_ip}"

else

	# run tmux attached to qBittorrent (daemonized, non-blocking)
	/usr/bin/script /home/nobody/typescript --command "/usr/bin/tmux new-session -d -s rt -n qbittorrent /usr/bin/qbittorrent"

fi

# make sure process qbittorrent DOES exist
retry_count=30
while true; do

    if ! pgrep -x "qbittorrent main" > /dev/null; then

        retry_count=$((retry_count-1))
        if [ "${retry_count}" -eq "0" ]; then

            echo "[warn] Wait for qBittorrent process to start aborted"
            break

        else

            if [[ "${DEBUG}" == "true" ]]; then
                echo "[debug] Waiting for qBittorrent process to start..."
            fi

            sleep 1s

        fi

    else

        echo "[info] qBittorrent process started"
        break

    fi

done

echo "[info] Waiting for qBittorrent process to start listening on port 5000..."

while [[ $(netstat -lnt | awk '$6 == "LISTEN" && $4 ~ ".5000"') == "" ]]; do
    sleep 0.1
done

echo "[info] qBittorrent process listening"