#!/bin/sh
QPKG_INSTALL_PATH=`/sbin/getcfg -f /etc/config/qpkg.conf CloudLink Install_Path`

# change dir to avoid no cwd error
cd $QPKG_INSTALL_PATH

# files to montir
ULINUX_CONFIG_FILE=/etc/config/uLinux.conf
QCLOUD_CONFIG_FILE=/etc/config/qid.conf
FILES_TO_MONITOR="$ULINUX_CONFIG_FILE $QCLOUD_CONFIG_FILE"

# get current QID_STATUS & VLINK_STATUS
QID_STATUS=`/sbin/getcfg -f $QCLOUD_CONFIG_FILE "QNAP ID Service" STATUS -d ""`
VLINK_STATUS=`/sbin/getcfg -f $QCLOUD_CONFIG_FILE "QNAP VLink Service" STATUS -d Disable`
OLD_QID_STATUS=$QID_STATUS
OLD_VLINK_STATUS=$VLINK_STATUS

# get current web config
WEB_ACCESS_PORT=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "System" "Web Access Port" -d "8080"`
SECURE_WEB_ACCESS_PORT=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "Stunnel" "Port" -d "443"`
FORCE_SSL=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "System" "Force SSL" -d "0"`
REGION=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "System" "REGION" -d ""`

print_web_config()
{
    echo "current web config: port=$WEB_ACCESS_PORT, \
secure_port: $SECURE_WEB_ACCESS_PORT, force_ssl: $FORCE_SSL, \
region: $REGION"
}

get_qid_vlink_status()
{
    # get sign-in status
    QID_STATUS=`/sbin/getcfg -f $QCLOUD_CONFIG_FILE "QNAP ID Service" STATUS -d ""`

    # get vlink enabled
    VLINK_STATUS=`/sbin/getcfg -f $QCLOUD_CONFIG_FILE "QNAP VLink Service" STATUS -d Disable`
}

operate_agents()
{
    echo "$1 tunnel agent"
    $QPKG_INSTALL_PATH/bin/tunnel_agent_ctl.sh $1 daemon
}

check_config()
{
    # if sign-in & cloudlink enabled, try to start tunnel_agent
    if [ "$QID_STATUS" == "3" ] && [ "$VLINK_STATUS" == "Enable" ]; then
        # get web config
        NEW_WEB_ACCESS_PORT=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "System" "Web Access Port" -d "8080"`
        NEW_SECURE_WEB_ACCESS_PORT=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "Stunnel" "Port" -d "443"`
        NEW_FORCE_SSL=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "System" "Force SSL" -d "0"`
        NEW_REGION=`/sbin/getcfg -f $ULINUX_CONFIG_FILE "System" "REGION" -d ""`

        # if web config is different, try to stop & start
        if [ "$WEB_ACCESS_PORT" != "$NEW_WEB_ACCESS_PORT" ] || \
            [ "$SECURE_WEB_ACCESS_PORT" != "$NEW_SECURE_WEB_ACCESS_PORT" ] || \
            [ "$FORCE_SSL" != "$NEW_FORCE_SSL" ] || \
            [ "$REGION" != "$NEW_REGION" ] || \
            [ "$OLD_QID_STATUS" != "$QID_STATUS" ] || \
            [ "$OLD_VLINK_STATUS" != "$VLINK_STATUS" ]; then
            # log
            echo "stop tunnel agent"

            # store config
            WEB_ACCESS_PORT=$NEW_WEB_ACCESS_PORT
            SECURE_WEB_ACCESS_PORT=$NEW_SECURE_WEB_ACCESS_PORT
            FORCE_SSL=$NEW_FORCE_SSL
            REGION=$NEW_REGION

            # stop for restart
            operate_agents stop

            # print current config
            print_web_config

            # start agent
            operate_agents start
        fi
    else
        operate_agents stop
    fi
}

flush_analytic_data_when_necessary()
{
    TIMESTAMP=`date +%s`

    # check analytic tool
    if [ ! -x '/usr/local/bin/qanalytic_tool' ]; then
        return
    fi

    # check timestamp
    if [ "y$NEXT_TIMESTAMP" == "y" ]; then
        NEXT_TIMESTAMP=`expr $TIMESTAMP + 43200 + $RANDOM % 43200`
        return
    fi
    if [ $TIMESTAMP -lt $NEXT_TIMESTAMP ]; then
        return
    fi

    # flush
    /usr/local/bin/qanalytic_tool flush -p myqnapcloud > /dev/null 2>&1

    # update last timestamp
    NEXT_TIMESTAMP=`expr $TIMESTAMP + 43200 + $RANDOM % 43200`
}

# print current config
print_web_config

# start monitoring
# not use -m here to avoid gettings a lot of events when star/stop agent
echo "start monitoring $FILES_TO_MONITOR ..."
while true
do
    FILE_MODIFIED=`/usr/sbin/inotifywait -e close_write -e create -e delete_self -e moved_to --format '%w' -t 600 $FILES_TO_MONITOR`

    # check if got event
    if [ "$?" != "0" ]; then
        flush_analytic_data_when_necessary
        continue
    fi

    # not know why, if get empty, it's uLinux
    if [ "$FILE_MODIFIED" == "" ]; then
        FILE_MODIFIED=$ULINUX_CONFIG_FILE
    fi

    # log
    echo "$FILE_MODIFIED modified, check if need to restart tunnel agent..."

    # process depends on modified file
    get_qid_vlink_status
    check_config

    # a hack to fix the QC-2779 bug
    OLD_QID_STATUS=$QID_STATUS
    OLD_VLINK_STATUS=$VLINK_STATUS
    get_qid_vlink_status
    while [ "$OLD_QID_STATUS $OLD_VLINK_STATUS" != "$QID_STATUS $VLINK_STATUS" ]; do
        check_config
        OLD_QID_STATUS=$QID_STATUS
        OLD_VLINK_STATUS=$VLINK_STATUS
        get_qid_vlink_status
    done
done