#!/bin/bash -e

set -o pipefail

ACTION=$1
BINARY="/opt/factorio/bin/x64/factorio"
MAP_FILE="mapfile.zip"

case ${ACTION} in
  "init")
    echo "Initializing files in case they do not exist: map-gen-settings.json / server-settings.json"
    [ -e map-gen-settings.json ] || cp /opt/defaults/map-gen-settings.json map-gen-settings.json
    [ -e server-settings.json ] || cp /opt/defaults/server-settings.json server-settings.json
    ;;
  "create")
    echo "Creating map at ${MAP_FILE} with settings from map-gen-settings.json"
    [ -e map-gen-settings.json ] || cp /opt/defaults/map-gen-settings.json map-gen-settings.json
    exec ${BINARY} --map-gen-settings map-gen-settings.json --create ${MAP_FILE}
    ;;
  "start")
    echo "Starting game from map file ${MAP_FILE} with settings from server-settings.json"

    if ! [ -e ${MAP_FILE} ]; then
      echo "Error: There is no map file at ${MAP_FILE}. Use 'create' or put a map file at that location."
      exit 1
    fi

    [ -e server-settings.json ] || cp /opt/defaults/server-settings.json server-settings.json
    exec ${BINARY} --server-settings server-settings.json --start-server ${MAP_FILE}
    ;;
  "help")
    echo "Usage: docker run quay.io/luzifer/factorio [init | create | start]"
    echo
    echo "Alternative: docker run quay.io/luzifer/factorio <factorio server options>"
    ;;
  *)
    exec ${BINARY} "$@"
    ;;
esac