#!/bin/sh

usage() {
echo "Usage: zrct [options] <operation>"
echo 'Set of operations for OpenRCT2 server management.
By default reads zsrct2.conf for config

Operations:
  start         start in screen instance in background
  startLocal    start the server in the current console
  console       prompt the screen instance (C-a + d to leave)
  backup        make a backup of current save
  getautosave   get latest autosave and sets it as active save
                -> auto backup of current save
                | alias: get
  update        recompile from latest source. Will overwrite previous server

Options:
  -h            display help
  -c <file>     use this file for config
  -s <save>     uses provided save file
  -S <server>   uses this server instance (folder)
'
}

save_backup () {
  echo "Backing up '$save_file' to $1.sv6.gz"
  cp "$save_file" "$backup_path/$1.sv6"
  gzip "$backup_path/$1.sv6"
}

unset save_file

config_file="zsrct2.conf"
while getopts ":hS:s:c:" opt;
do
  case $opt in
    h)
      usage
      exit 0
      ;;
    S)
      server_path=${OPTARG}
      ;;
    s)
      save_file=${OPTARG}
      ;;
    c)
      config_file=${OPTARG}
      ;;
    *)
      echo "Incorrect option: $OPTARG"
      exit
      ;;
  esac
done

if [ ! -f "$config_file" ]
then
  echo "Generating default config file"
	echo '# zsrct2 1.0 config file
SAVE_NAME=
SERVER_NAME=server
PORT=11753
SCREEN_NAME=OpenRCT2
SAVE_FOLDER=saves
BACKUP_FOLDER=saves/backup
DATA_FOLDER=data
SRC_FOLDER=src
' >> "$config_file" || exit 1
fi

save_name=$(grep "SAVE_NAME=" "$config_file" | cut -d '=' -f2-)
server_path=$(grep "SERVER_PATH=" "$config_file" | cut -d '=' -f2-)
port=$(grep "PORT=" "$config_file" | cut -d '=' -f2-)
screen_name=$(grep "SCREEN_NAME=" "$config_file" | cut -d '=' -f2-)
save_path=$(grep "SAVE_PATH=" "$config_file" | cut -d '=' -f2-)
backup_path=$(grep "BACKUP_PATH=" "$config_file" | cut -d '=' -f2-)
data_path=$(grep "DATA_PATH=" "$config_file" | cut -d '=' -f2-)
src_path=$(grep "SRC_PATH=" "$config_file" | cut -d '=' -f2-)

[ -z "$save_file" ] && save_file="$save_path/$save_name.sv6"

[ ! -d "$backup_path" ] && mkdir -p "$backup_path"
[ ! -d "$save_path" ] && mkdir -p "$save_path"
[ ! -d "$data_path" ] && mkdir -p "$data_path"

shift $((OPTIND-1))

if [ "$1" ]
  then
  if [ "$1" = "start" ]
  then
    screen -dmS "$screen_name" "$server_path/openrct2" host "$save_file" --user-data-path "$data_path" --port "$port" --headless

  elif [ "$1" = "startLocal" ]
  then
    "$server_path/openrct2" host "$save_file" --user-data-path "$data_path" --port "$port" --headless

  elif [ "$1" = "console" ]
  then
    screen -r "$screen_name"

  elif [ "$1" = "backup" ]
  then

    if [ -n "$2" ]
    then
      save_backup "$2"
    else
      save_backup "$save_name"_"$(date -u "+20%y-%m-%d_%H%M%S")"
    fi

  elif [ "$1" = "getautosave" ] || [ "$1" = "get" ]
  then
    autosave=$(ls -l "$data_path/save/autosave/" | grep autosave | tail -1 | tr -s ' ' | cut -d ' ' -f9-)
    mv "$save_file" "$backup_path/$(basename "$save_file")"_"$(date -u "+20%y-%m-%d_%H%M%S")"
    mv "$data_path/save/autosave/$autosave" "$save_file"

  elif [ "$1" = "update" ]
  then
    DISCORD_RPC=false DESKTOP_ENTRY=false CLEAN_SRC=false SRCDIR="$src_path" DESTDIR="$server_path" zrct2-install

  else
    usage
  fi
else
  usage
fi