#!/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