#!/bin/bash

# delay starting after 2 failed runs
delay_after=2
# reset delay counter after 60 seconds
delay_reset_after=60
# delay for 30 seconds
delay=30

times_ran=0

cleanup() {
  if [ -n "$pid" ]; then
    echo "killed... $pid" >&2
    kill $pid
  fi
  exit
}

trap cleanup 2 15

while :; do
	case $1 in
		--delay)
			if [[ ! $2 ]]; then
				echo "Missing argument to --delay" >&2
				exit 1
			fi

			delay=$2
			shift 2
			continue
			;;
		--reset-after)
			if [[ ! $2 ]]; then
				echo "Missing argument to --reset-after" >&2
				exit 1
			fi

			delay_reset_after=$2
			shift 2
			continue
			;;
		--delay-after)
			if [[ ! $2 ]]; then
				echo "Missing argument to --delay-after" >&2
				exit 1
			fi

			delay_after=$2
			shift 2
			continue
			;;
		--help|-h)
			echo "usage: ${0##*/} [options] [--] <command ...>"
			echo ''
			echo 'Options:'
			echo '  --help, -h   this help'
			echo '  --delay <number>        amount of delay after enoguh failed runs'
			echo '  --delay-after <number>  amount of runs after which we wait'
			echo '  --reset-after <number>  reset the failed counter after this time'
			exit 0
			;;
		--)
			shift
			break
			;;
		*)
			break
			;;
	esac
	shift
done

command=("$@")

while :; do
  times_ran=$(($times_ran+1))
  if [ $times_ran -gt $delay_after ]; then
    echo "sleeping for $delay seconds after $(($times_ran-1)) runs in $delay_reset_after seconds" >&2
    sleep $delay
  fi

  time_started=`date +%s`
  echo -n "running... " >&2

  ${command[@]} &
  pid=$!
  echo PID: $pid >&2
  wait $pid
  pid=""

  # reset counter if run long enough
  if [ $(($time_started+$delay_reset_after)) -lt `date +%s` ]; then
    times_ran=0
  fi
done