#!/bin/bash

. /start-utils

export FTB_BASE_DIR=/data/FeedTheBeast
legacyJavaFixerUrl=http://ftb.cursecdn.com/FTB2/maven/net/minecraftforge/lex/legacyjavafixer/1.0/legacyjavafixer-1.0.jar
export TYPE=FEED-THE-BEAST

FTB_SERVER_MOD=${FTB_SERVER_MOD:-$CF_SERVER_MOD}

log "Looking for Feed-The-Beast / CurseForge server modpack."
if [[ -z $FTB_SERVER_MOD ]]; then
    log "Environment variable FTB_SERVER_MOD not set."
    log "Set FTB_SERVER_MOD to the file name of the FTB server modpack."
    log "(And place the modpack in the /data directory.)"
    exit 2
fi

entryScriptExpr="-name ServerStart.sh -o -name ServerStartLinux.sh -o -name LaunchServer.sh"

if [[ -d ${FTB_BASE_DIR} ]]; then
  startScriptCount=$(find ${FTB_BASE_DIR} $entryScriptExpr |wc -l)
  if [[ $startScriptCount > 1 ]]; then
    log "Conflicting FTB/CurseForge packages have been installed. Please cleanup ${FTB_BASE_DIR}"
    exit 2
  fi
else
  startScriptCount=0
fi

# only download and install if a mod pack isn't already installed
# also check for the start script rather than just the folder
# this allows saving just the world separate from the rest of the data directory
if [[ $startScriptCount = 0 ]]; then
  srv_modpack=${FTB_SERVER_MOD}
  if isURL ${srv_modpack}; then
      case $srv_modpack in
        https://www.feed-the-beast.com/*/download|https://www.curseforge.com/minecraft/modpacks/*/download/*/file)
          ;;
        https://www.curseforge.com/minecraft/modpacks/*/download/*)
          srv_modpack=${srv_modpack}/file;;
        https://www.feed-the-beast.com/*)
          srv_modpack=${srv_modpack}/download;;
      esac
      file=$(basename $(dirname $srv_modpack))
      downloaded=/data/${file}.zip
      if [ ! -e $downloaded ]; then
        log "Downloading FTB modpack...
  $srv_modpack -> $downloaded"
        curl -sSL -o $downloaded $srv_modpack
      fi
      srv_modpack=$downloaded
  fi
  if [[ ${srv_modpack:0:5} == "data/" ]]; then
      # Prepend with "/"
      srv_modpack=/${srv_modpack}
  fi
  if [[ ! ${srv_modpack:0:1} == "/" ]]; then
      # If not an absolute path, assume file is in "/data"
      srv_modpack=/data/${srv_modpack}
  fi
  if [[ ! -f ${srv_modpack} ]]; then
      log "FTB server modpack ${srv_modpack} not found."
      exit 2
  fi
  if [[ ! ${srv_modpack: -4} == ".zip" ]]; then
      log "FTB server modpack ${srv_modpack} is not a zip archive."
      log "Please set FTB_SERVER_MOD to a file with a .zip extension."
      exit 2
  fi

  log "Unpacking FTB server modpack ${srv_modpack} ..."
  mkdir -p ${FTB_BASE_DIR}
  unzip -o ${srv_modpack} -d ${FTB_BASE_DIR} | awk '{printf "."} END {print ""}'
fi

if [[ $(find ${FTB_BASE_DIR} $entryScriptExpr | wc -l) = 0 ]]; then

    # Allow up to 2 levels since some modpacks have a top-level directory named
    # for the modpack
    forgeJar=$(find ${FTB_BASE_DIR} -maxdepth 2 -name 'forge*.jar' -a -not -name 'forge*installer')
    if [[ "$forgeJar" ]]; then
      export FTB_BASE_DIR=$(dirname "${forgeJar}")
      log "No entry script found, so building one for ${forgeJar}"
      cat > "${FTB_BASE_DIR}/ServerStart.sh" <<EOF
#!/bin/sh
. ./settings-local.sh
java \${JAVA_PARAMETERS} -Xmx\${MAX_RAM} -jar $(basename "${forgeJar}") nogui
EOF
      chmod +x "${FTB_BASE_DIR}/ServerStart.sh"
    else
      log "Please make sure you are using the server version of the FTB modpack!"
      exit 2
    fi
fi

scriptCount=$(find "${FTB_BASE_DIR}" $entryScriptExpr | wc -l)
if [[ $scriptCount = 0 ]]; then
    log "Please make sure you are using the server version of the FTB modpack!"
    exit 2
elif [[ $scriptCount > 1 ]]; then
    log "Ambigous startup scripts in FTB modpack!"
    log "found:"
    find ${FTB_BASE_DIR} $entryScriptExpr
    exit 2
fi

export FTB_SERVER_START=$(find "${FTB_BASE_DIR}" $entryScriptExpr)

export FTB_DIR=$(dirname "${FTB_SERVER_START}")
chmod a+x "${FTB_SERVER_START}"
grep fml.queryResult=confirm ${FTB_SERVER_START} > /dev/null || \
    sed -i 's/-jar/-Dfml.queryResult=confirm -jar/' "${FTB_SERVER_START}"
sed -i 's/.*read.*Restart now/#\0/' "${FTB_SERVER_START}"
legacyJavaFixerPath="${FTB_DIR}/mods/legacyjavafixer.jar"

if isTrue ${FTB_LEGACYJAVAFIXER} && [ ! -e "${legacyJavaFixerPath}" ]; then
  log "Installing legacy java fixer to ${legacyJavaFixerPath}"
  curl -sSL -o "${legacyJavaFixerPath}" ${legacyJavaFixerUrl}
fi

if [ -e "${FTB_DIR}/FTBInstall.sh" ]; then
  pushd "${FTB_DIR}"
  sh FTBInstall.sh
  popd
elif [ -e "${FTB_DIR}/Install.sh" ]; then
  pushd "${FTB_DIR}"
  sh Install.sh
  popd
fi

# Continue to Final Setup
exec /start-finalSetup01World $@