#!/usr/bin/env bash

## Default Values for config options
declare -A config

options_found=0
boxes_url="boxes.apixio.com"

config=(
  ["name"]="${name:-apx}"
  ["version"]="${version:-c7}"
  ["release"]="${release:-$(date +"%Y%m%d-%H%M")}"
  ["memory"]="${memory:-512}"
  ["size"]="${size:-61440}"
  ["packer_user"]="${packer_user:-root}"
  ["packer_password"]="${packer_password:-vagrant}"
)


executor() {
  if [[ "$1" == "build" ]]; then
    echo "Starting build with options:"

    for option in "${!config[@]}"
    do
      echo "$option = ${config[$option]}"
    done

    for option in "${!config[@]}"
    do
      args+=(-var "$option=${config[$option]}");
    done
      packer build "${args[@]}" "${config[name]}-${config[version]}.json"
      if (( "$upload" == 1 )); then
        ping -q -c2 "$boxes_url" &> /dev/null
        if (( "$?" == 0 )); then
          echo "Beginning upload to: $boxes_url"
        else
          echo "Host: $boxes_url is not available, skipping upload."
        fi
      fi

  fi

  if [[ "$1" == "show_help" ]]; then
    show_help
  fi

}

show_help() {
  scriptname="${0##*/}"
cat <<- EOF
  | $scriptname
  |-------------------------------------------------------------------
  | Options:              Usage
  | -a, --aws             Execute the aws builder
  | -b, --box             Build box <boxname>
  | -h, -?, --help        Display this help dialogue
  | -u, --upload          Upload the box to the box host
  | -v, --vbox            Execute the virtualbox builder

EOF
}

main() {
  while getopts ":abhuvV:" opt;
  do
    options_found=1
    case "$opt" in
      a)
        break
        ;;
      b)
        executor build
        ;;
      h)
        executor show_help
        ;;
      u)
        upload=1
        ;;
      v)
        virtual_box="true"
        ;;
      V)
        key="${OPTARG##=*}" val="${OPTARG#*=}"
        key="${OPTARG%%=*}" val="${OPTARG#*=}"

        if [[ "${config[$key]+isset}" ]]; then
          echo "Valid variable found: $key"
          echo "Setting $key to $val"
          declare "$key"="$val"
          echo "${key} has been set to ${config[$key]}"
        else
          echo -e "Invalid value specified: $key\n"
          echo "Value values are:"
          for value in "${!config[@]}"
          do
            echo "$value"
          done
        fi
        ;;

      \?)
        echo "Invalid option: -$OPTARG" >&2
        executor show_help
        ;;
      :)
        echo "Option -$OPTARG requires an argument." >&2
        break
    esac
  done

  if ((!options_found)); then
    echo "No valid options found"
  fi
}

main "$@"