#!/bin/bash

function config {
  if [[ ! -s $1 ]]; then
    echo "Specify a valid properties file."
    exit 1
  fi

  if [[ -s /usr/share/dom4/current ]]; then
    game=$(</usr/share/dom4/current)
    new=$(basename $1 .properties)
    read -r -n 2 -p "A game named $game already exists. Set up to host $new instead? [Y/n] " ovr
    if [[ $ovr != Y ]]; then
      exit 0
    fi
  fi

  echo "Copying properties file"

  cp $1 /usr/share/dom4/config

  mapfile=$(grep -oP "mapfile\s+\K.+" $1)
  mapname=$(basename $mapfile .map)

  echo "Copying $mapname map files"

  mkdir -p /usr/share/dom4/maps

  USER_HOME=$(getent passwd $SUDO_USER | cut -d: -f6)
  cp "$USER_HOME/dominions4/maps/$mapname."* /usr/share/dom4/maps

  # Set name as current hosted game
  echo $(basename $1 .properties) > /usr/share/dom4/current

  cat <<EOF

Done. Start the service to let players upload their pretenders.

  sudo systemctl start dom4-server.service

Once all pretenders have been uploaded, stop the service and set the game to ready.

  sudo dom4 ready
EOF
}

function ready {
  if [[ ! -s /usr/share/dom4/current ]]; then
    echo "No current game found. Use dom4 config to load game configuration."
    exit 1
  fi

  game=$(</usr/share/dom4/current)
  players=$(ls -1 /usr/share/dom4/savedgames/$game | wc -l)

  if grep -qE "uploadtime|uploadmaxp" /usr/share/dom4/config/$game.properties ; then
    echo "Upload flag already set. Start the service with systemctl."
    exit 1
  fi

  echo "Setting start flag for $game ($players players)"

  echo "uploadmaxp $players" >> "/usr/share/dom4/config/$game.properties"

  cat <<EOF

Flag set. Start the dom4-server service to begin the game.

  sudo systemctl start dom4-server.service

You may wish to enable it as well to ensure it restarts on boot.
EOF
}

function delete {
  if [[ -z $1 ]]; then
    echo "Specify a game name to delete."
    exit 0
  fi

  if [[ $1 = "default" ]]; then
    echo "Not deleting the default config."
    exit 0
  fi

  game=$(</usr/share/dom4/current)

  if [[ $game = $1 ]]; then
    read -r -n 2 -p "$game is currently being hosted. Really delete? [Y/n] " ovr
    if [[ $ovr != Y ]]; then
      exit 0
    fi

    rm /usr/share/dom4/current
  fi

  # leave the mapfile in case something else is using it
  rm /usr/share/dom4/config/$1.properties
  rm -rf /usr/share/dom4/savedgames/$1
}

if [[ $EUID -ne 0 && ! -z $1 ]]; then
   echo "This script must be run as root or via sudo."
   exit 1
fi

case $1 in
  config)
    config "${@:2}"
    ;;

  ready)
    ready "${@:2}"
    ;;

  delete)
    delete "${@:2}"
    ;;

  "")
    cat <<EOF
Get an example template to modify in your editor of choice:

  cp /usr/share/dom4/config/default.properties mygame.properties

Load a game config file:

  sudo dom4 config path/to/mygame.properties

Set start flag for current game after all pretenders have been uploaded, prior to running service:

  sudo dom4 ready

Delete a game:

  sudo dom4 delete mygame

Start the service:

  sudo systemctl start dom4-server.service

Stop the service:

  sudo systemctl stop dom4-server.service

Troubleshooting:

If the service isn't running, figure out what's going wrong:

  systemctl status dom4-server.service
EOF
    ;;
esac