#!/bin/bash
set -eu

# shellcheck source=start-utils
. ${SCRIPTS:-/}start-utils

requireVar VANILLA_VERSION
export TYPE=FABRIC
export SERVER=fabric-server-${VANILLA_VERSION}.jar

isDebugging && set -x

if [[ ! -e ${SERVER} ]]; then

  : ${FABRIC_INSTALLER:=}
  : ${FABRIC_INSTALLER_URL:=}
  : ${FABRIC_INSTALLER_VERSION:=${FABRICVERSION:-LATEST}}

  if [[ -z $FABRIC_INSTALLER && -z $FABRIC_INSTALLER_URL ]]; then
    log "Checking Fabric version information."
    if [[ ${FABRIC_INSTALLER_VERSION^^} = LATEST ]]; then
      FABRIC_INSTALLER_VERSION=$(maven-metadata-release https://maven.fabricmc.net/net/fabricmc/fabric-installer/maven-metadata.xml)
    fi

    FABRIC_INSTALLER="fabric-installer-${FABRIC_INSTALLER_VERSION}.jar"
    FABRIC_INSTALLER_URL="https://maven.fabricmc.net/net/fabricmc/fabric-installer/${FABRIC_INSTALLER_VERSION}/fabric-installer-${FABRIC_INSTALLER_VERSION}.jar"
  elif [[ -z $FABRIC_INSTALLER ]]; then
    FABRIC_INSTALLER="fabric-installer.jar"
  elif [[ ! -e $FABRIC_INSTALLER ]]; then
    log "ERROR: the given Fabric installer doesn't exist : $FABRIC_INSTALLER"
    exit 2
  fi

  if [[ ! -e $FABRIC_INSTALLER ]]; then
    log "Downloading $FABRIC_INSTALLER_URL ..."
    if ! get -o "$FABRIC_INSTALLER" "$FABRIC_INSTALLER_URL"; then
      log "Failed to download from given location $FABRIC_INSTALLER_URL"
      exit 2
    fi
  fi

  log "Installing Fabric ${VANILLA_VERSION} using $FABRIC_INSTALLER"

  tries=3
  set +e
  while ((--tries >= 0)); do
    java -jar $FABRIC_INSTALLER server \
      -mcversion $VANILLA_VERSION \
      -downloadMinecraft \
      -dir /data
    if [[ $? == 0 ]]; then
      break
    fi
  done
  set -e
  if (($tries < 0)); then
    log "Fabric failed to install after several tries." >&2
    exit 10
  fi

  mv fabric-server-launch.jar "${SERVER}"
fi

exec ${SCRIPTS:-/}start-setupWorld "$@"