#!/bin/bash

set -e -o pipefail
PROG="/usr/bin/tailscaled"
PROG_TMP="/tmp/tailscale.tgz"
PROG_TMP_FOLDER="/tmp/tailscale"
FORCE_INIT="0"
TAILSCALE_VER="1.48.1"
PROG_URL="https://pkgs.tailscale.com/stable/tailscale_${TAILSCALE_VER}_arm.tgz"

test -n "${OS_VERSION}" || source /etc/init.d/base

install() {
    if [ -f "${PROG}" ] && [ "${FORCE_INIT}" == "0" ];
    then
        /bin/true
    else
        if [ ! -f "/tmp/S98tailscale" ]
        then
            echo "Plese run:"
            echo "curl -L https://raw.githubusercontent.com/goldfix/motioneyeos_ext/main/src/S98tailscale -o /tmp/S98tailscale && bash /tmp/S98tailscale install"
            echo "to reinstall."
            exit 1
        fi
        mount -o remount,rw /
        mount -o remount,rw /boot

        rm -rf /usr/bin/tailscale*
        rm -rf /tmp/tailscale*
        cd /tmp
        curl -L ${PROG_URL} --output ${PROG_TMP}
        tar xvf ${PROG_TMP}
        mv /tmp/tailscale_${TAILSCALE_VER}_arm ${PROG_TMP_FOLDER}
        cp ${PROG_TMP_FOLDER}/tailscale /usr/bin/
        cp ${PROG_TMP_FOLDER}/tailscaled /usr/bin/
        rm -rf /tmp/tailscale*
        # rmmod tun
        # modprobe tun

        chmod ugo+rx /tmp/S98tailscale
        cp -a /tmp/S98tailscale /etc/init.d/
    fi
}

start() {
    msg_begin "Starting tailscale"
    modprobe tun
    ${PROG} --state=/usr/bin/tailscaled.state > /var/log/tailscaled.log 2>&1 &
    test $? == 0 && msg_done || msg_fail
    return 0
}

stop() {
    msg_begin "Stopping tailscale"
    killall -q $(basename ${PROG})
    msg_done
}

case "$1" in
    start)
        install
        start
        ;;

    stop)
        stop
        ;;

    restart)
        stop
        start
        ;;

    install)
        FORCE_INIT="1"
        install
        ;;
    *)
        echo "Usage: $0 {start|stop|restart|install}"
        exit 1
        ;;
esac

exit $?