#!/usr/bin/env bash

#PARAMETER 1: directory
#PARAMETER 2: binary file

_bin_path=$1
_bin_file=$2

_instant_crash_count=0
_restart_count=0

if [ "$#" -ne 2 ]; then
    echo "Usage:    $0 path filename"
    echo "Example:  $0 $HOME/azeroth-server/bin worldserver"
    exit 1
fi

while true
do
    if [ ! -f "$_bin_path/$_bin_file" ]; then
        echo "$_bin_path/$_bin_file doesn't exists!"
        exit 1
    fi

    STARTING_TIME=$(date +%s)

    cd "$_bin_path" && "./$_bin_file" # &>/dev/null;
    _exit_code=$?

    echo "exit code: $_exit_code"
    # stop restarter on SIGKILL (disabled for now)
    # 128 + 9 (SIGKILL)
    #if [ $_exit_code -eq 137 ]; then
    #	echo "$_bin_file has been killed"
    #    exit 0
    #fi

    echo "$_bin_file terminated, restarting..."

    ENDING_TIME=$(date +%s)
    DIFFERENCE=$(( $ENDING_TIME - $STARTING_TIME ))

    ((_restart_count++))
    echo "$_bin_file Terminated after $DIFFERENCE seconds, termination count: : $_restart_count"

    if [ $DIFFERENCE -lt 10 ]; then
        # increment instant crash if runtime is lower than 10 seconds 
        ((_instant_crash_count++))
    else
        _instant_crash_count=0 # reset count
    fi

    if [ $_instant_crash_count -gt 5 ]; then
        echo "$_bin_file Restarter exited. Infinite crash loop prevented. Please check your system"
        exit 1
    fi
done