#!/bin/bash
Script="${0} ${*}"

function usage {
    echo "Usage: ${0}  [--restart] [--stop] [--once] [--sleep_sec=<num_seconds>]"
    exit 1
}

for arg in "${@}"
do
    case ${arg} in
        --restart)
            Restart=Y
            shift
            ;;
        --stop)
            Stop="Y"
            shift
            ;;
        --once)
            Once="Y"
            shift
            ;;
        --sleep_sec=*)
            SleepSec="${arg#*=}"
            shift
            ;;
        -*|--*)
            usage
            ;;
        *)
            ;;
    esac
done

if [ "${SleepSec}" == "" ]
then
    SleepSec=5
fi

RootDir=/home/cvtt/prod
CfgSvcDir=${RootDir}/config_service

export PYTHONPATH="${RootDir}:${PYTHONPATH}"

Name=config_server
ServerPy="${RootDir}/cvttpy/apps/utils/config_server.py"
ServicePort=6789
ServiceDir=${CfgSvcDir}/data
LogDir=${RootDir}/logs

source ${HOME}/.pyenv/python3.10-venv/bin/activate
export PYTHONPATH="${RootDir}:${PYTHONPATH}"

Cmd="nohup"
Cmd="${Cmd} python3"
Cmd="${Cmd} ${ServerPy}"
Cmd="${Cmd} --port=${ServicePort}"
Cmd="${Cmd} --root=${ServiceDir}"
Cmd="${Cmd} --log_file=${LogDir}/%T.config_service.log"

function start_it {
    echo ${Cmd}
    eval ${Cmd} &
    sleep 10
}

function check_it {
    if !(timeout 3 curl -s localhost:${AdminPort}/ping > /dev/null)
    then
        echo "${Script} doesn't respond. restarting..."
        start_app
        pids=$(ps -ef | grep "port=${ServicePort}" | grep "root=${ServiceDir}" | grep -v grep | tr -s ' ' |cut  -d' '  -f2)
        echo pids=${pids}
        if [ "${pids}" != "" ]
        then
            kill -9 ${pids}
        fi
        start_it
    fi
}

function kill_it {
    pids=$(ps -ef |grep $(basename ${0}) |grep -v ${$} |grep -v grep |tr -s ' ' |cut  -d' '  -f2)

    if [ "${pids}" != "" ]
    then
        echo "Killing ${pids} ..."
        kill -9 ${pids}
    fi
    while (timeout 3 curl -s localhost:${AdminPort}/ping > /dev/null)
    do
        echo "Shutting down localhost:${AdminPort}/shutdown ..."
        timeout 10 curl -s localhost:${AdminPort}/shutdown
    done
}

if [ "${Stop}" == "Y"  ] ; then
    kill_it
    exit 0
fi

if [ "${Once}" == "Y"  ] ; then
    start_it
    exit 0
fi


if [ "${Restart}" == "Y"  ]
then
    kill_it
fi

start_it

while true
do
    check_it
    echo "${Script} is checked" | /usr/bin/ts '[%Y-%m-%d %H:%M:%S]'
    sleep ${SleepSec}
done