#!/usr/bin/env bash

# How many seconds to sleep before starting the server again, unless it is explicitly specified
DEFAULT_SLEEP_SECONDS=3

function show_help {
  local cmd=$0
  # TODO accept list of servers as argument

  echo "Create a start loop for the proxy server and optionally start a number of paper servers with it"
  echo ""
  echo "Usage: $cmd [OPTIONS]"
  echo ""
  echo "OPTIONS:"
  echo "  -s --sleep <secs>  How many seconds to sleep after stopping the server"
  # TODO show server options
  echo "  -h --help          Show this message"

  exit
}

function main {
  # TODO create servers

  local sleep_seconds=$DEFAULT_SLEEP_SECONDS
  local help=false

  # Parse arguments
  local cmd=$0
  while [[ $# -gt 0 ]]; do
    local arg=$1
    case "$arg" in
      "--sleep" | "-s")
        sleep_seconds=$2
        shift 2
        ;;
      "--help" | "-h")
        help=true
        shift
        ;;
      *)
        err "Unknown argument: $arg"
        ;;
    esac
  done

  if $help; then
    show_help "$cmd"
  fi

  while true
  do
    echo "Starting proxy..."
    ./launch.sh
    echo "Sleeping for $sleep_seconds seconds..."
    sleep "$sleep_seconds"
  done
}

# Shows an error message and exits the program with code 1
#
# Usage: err <msg>
function err {
  echo "$1"
  exit 1
}

main "$@"