#!/bin/bash

. ${SCRIPTS:-/}start-utils
isDebugging && set -x

if [ -n "$OPS" ]; then
  log "Updating ops"
  rm -f /data/ops.txt.converted
  echo $OPS | awk -v RS=, '{print}' > /data/ops.txt
fi
if isTrue "${OVERRIDE_OPS}"; then
  log "Recreating ops.json file at server startup"
  rm -f /data/ops.json
fi

if [ -n "$WHITELIST" ]; then
  log "Updating whitelist"
  rm -f /data/white-list.txt.converted
  echo $WHITELIST | awk -v RS=, '{print}' > /data/white-list.txt
fi
if isTrue "${OVERRIDE_WHITELIST}"; then
  log "Recreating whitelist.json file at server startup"
  rm -f /data/whitelist.json
fi

if [ -n "$ICON" ]; then
    if [ ! -e server-icon.png ] || [ "${OVERRIDE_ICON}" == "TRUE" ]; then
      log "Using server icon from $ICON..."
      # Not sure what it is yet...call it "img"
      curl -sSL -o /tmp/icon.img $ICON
      specs=$(identify /tmp/icon.img | awk '{print $2,$3}')
      if [ "$specs" = "PNG 64x64" ]; then
        mv /tmp/icon.img /data/server-icon.png
      else
        log "Converting image to 64x64 PNG..."
        convert /tmp/icon.img -resize 64x64! /data/server-icon.png
      fi
    fi
fi

if isTrue ${ENABLE_ROLLING_LOGS:-false}; then
  # Set up log configuration
  LOGFILE="/data/log4j2.xml"
  if [ ! -e "$LOGFILE" ]; then
    log "Creating log4j2.xml in ${LOGFILE}"
    cp /tmp/log4j2.xml "$LOGFILE"
  else
    log "log4j2.xml already created, skipping"
  fi
  JVM_OPTS="-Dlog4j.configurationFile=/data/log4j2.xml ${JVM_OPTS}"
fi

# Make sure files exist and are valid JSON (for pre-1.12 to 1.12 upgrades)
log "Checking for JSON files."
JSON_FILES=$(find /data -maxdepth 1 -name '*.json')
for j in $JSON_FILES; do
  if [[ $(cat "$j" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//') == "" ]]; then
    log "Fixing JSON $j"
    echo '[]' > $j
  fi
done

# Optional disable console
if versionLessThan 1.14 && [[ ${CONSOLE,,} = false ]]; then
  EXTRA_ARGS+=" --noconsole"
fi

# Optional disable GUI for headless servers
if [[ ${GUI} = false || ${GUI} = FALSE ]]; then
  EXTRA_ARGS+=" nogui"
fi

# put these prior JVM_OPTS at the end to give any memory settings there higher precedence
log "Setting initial memory to ${INIT_MEMORY:=${MEMORY}} and max to ${MAX_MEMORY:=${MEMORY}}"

expandedDOpts=
if [ -n "$JVM_DD_OPTS" ]; then
      for dopt in $JVM_DD_OPTS
      do
          expandedDOpts="${expandedDOpts} -D${dopt/:/=}"
      done
fi

if isTrue ${ENABLE_JMX}; then
  : ${JMX_PORT:=7091}
  JVM_OPTS="${JVM_OPTS}
  -Dcom.sun.management.jmxremote.local.only=false
  -Dcom.sun.management.jmxremote.port=${JMX_PORT}
  -Dcom.sun.management.jmxremote.rmi.port=${JMX_PORT}
  -Dcom.sun.management.jmxremote.authenticate=false
  -Dcom.sun.management.jmxremote.ssl=false
  -Dcom.sun.management.jmxremote.host=${JMX_BINDING:-0.0.0.0}
  -Djava.rmi.server.hostname=${JMX_HOST:-localhost}"

  log "JMX is enabled. Make sure you have port forwarding for ${JMX_PORT}"
fi

if isTrue "${USE_AIKAR_FLAGS}"; then
  # From https://mcflags.emc.gs/

  if (( $(normalizeMemSize "${MAX_MEMORY}") >= $(normalizeMemSize 12g) )); then
    log "Using Aikar's >12GB flags"
    G1NewSizePercent=40
    G1MaxNewSizePercent=50
    G1HeapRegionSize=16M
    G1ReservePercent=15
    InitiatingHeapOccupancyPercent=20
  else
    log "Using Aikar's flags"
    G1NewSizePercent=30
    G1MaxNewSizePercent=40
    G1HeapRegionSize=8M
    G1ReservePercent=20
    InitiatingHeapOccupancyPercent=15
  fi

  JVM_XX_OPTS="${JVM_XX_OPTS}
  -XX:+UseG1GC
  -XX:+ParallelRefProcEnabled
  -XX:MaxGCPauseMillis=200
  -XX:+UnlockExperimentalVMOptions
  -XX:+DisableExplicitGC
  -XX:+AlwaysPreTouch
  -XX:G1NewSizePercent=${G1NewSizePercent}
  -XX:G1MaxNewSizePercent=${G1MaxNewSizePercent}
  -XX:G1HeapRegionSize=${G1HeapRegionSize}
  -XX:G1ReservePercent=${G1ReservePercent}
  -XX:G1HeapWastePercent=5
  -XX:G1MixedGCCountTarget=4
  -XX:InitiatingHeapOccupancyPercent=${InitiatingHeapOccupancyPercent}
  -XX:G1MixedGCLiveThresholdPercent=90
  -XX:G1RSetUpdatingPauseTimePercent=5
  -XX:SurvivorRatio=32
  -XX:+PerfDisableSharedMem
  -XX:MaxTenuringThreshold=1
  -Dusing.aikars.flags=https://mcflags.emc.gs
  -Daikars.new.flags=true
  "
fi

if isTrue "${USE_LARGE_PAGES}"; then
  JVM_XX_OPTS="${JVM_XX_OPTS}
  -XX:+UseLargePagesInMetaspace
  "
fi

if isTrue "${USE_FLARE_FLAGS}"; then
  JVM_XX_OPTS="${JVM_XX_OPTS}
  -XX:+UnlockDiagnosticVMOptions
  -XX:+DebugNonSafepoints
  "
fi

if isTrue "${DEBUG_MEMORY}"; then
  log "Memory usage and availability (in MB)"
  uname -a
  free -m
fi

JVM_OPTS="-Xms${INIT_MEMORY} -Xmx${MAX_MEMORY} ${JVM_OPTS}"

function copyFilesForCurseForge() {
  # copy player modification files unconditionally since their
  # processing into json is additive anyway
  [ -f /data/ops.txt ] && cp -f /data/ops.txt "${FTB_DIR}/"
  [ -f /data/white-list.txt ] && cp -f /data/white-list.txt "${FTB_DIR}/"

  if [ ! -e "${FTB_DIR}/server-icon.png" -a -e /data/server-icon.png ]; then
    cp -f /data/server-icon.png "${FTB_DIR}/"
  fi

  cp -f /data/eula.txt "${FTB_DIR}/"
}

mcServerRunnerArgs="--stop-duration ${STOP_DURATION:-60}s"
if [[ ${TYPE} == "CURSE_INSTANCE" ]]; then
    if isTrue ${DEBUG_EXEC}; then
      set -x
    fi
    exec mc-server-runner ${mcServerRunnerArgs} \
      --cf-instance-file "${CURSE_INSTANCE_JSON}" \
      java $JVM_XX_OPTS $JVM_OPTS $expandedDOpts -jar _SERVERJAR_ "$@" $EXTRA_ARGS
elif [[ ${TYPE} == "CURSEFORGE" && "${SERVER}" ]]; then
  copyFilesForCurseForge

  cd "${FTB_DIR}"
  log "Starting CurseForge server in ${FTB_DIR}..."
  if isTrue ${DEBUG_EXEC}; then
    set -x
  fi
  exec mc-server-runner ${bootstrapArgs} ${mcServerRunnerArgs} java $JVM_XX_OPTS $JVM_OPTS $expandedDOpts -jar $(basename "${SERVER}") "$@" $EXTRA_ARGS
elif [[ ${TYPE} == "CURSEFORGE" ]]; then
  mcServerRunnerArgs="${mcServerRunnerArgs} --shell bash"

  copyFilesForCurseForge

  cat > "${FTB_DIR}/settings-local.sh" <<EOF
export MIN_RAM="${INIT_MEMORY}"
export MAX_RAM="${MAX_MEMORY}"
export JAVA_PARAMETERS="${JVM_XX_OPTS} -Xms${INIT_MEMORY} ${JVM_OPTS} $expandedDOpts"
EOF

  # patch CurseForge cfg file, if present
  if [ -f "${FTB_DIR}/settings.cfg" ]; then
    sed -i "s/MAX_RAM=[^;]*/MAX_RAM=${MAX_MEMORY}/" "${FTB_DIR}/settings.cfg"
  fi

  cd "${FTB_DIR}"
  log "Running FTB ${FTB_SERVER_START} in ${FTB_DIR} ..."

  finalArgs=(
    "${FTB_SERVER_START}"
  )

  if isTrue ${DEBUG_EXEC}; then
    set -x
  fi
  if isTrue ${EXEC_DIRECTLY:-false}; then
    "${finalArgs[@]}"
  else
    exec mc-server-runner ${mcServerRunnerArgs} "${finalArgs[@]}"
  fi
else
  # If we have a bootstrap.txt file... feed that in to the server stdin
  if [ -f /data/bootstrap.txt ]; then
    bootstrapArgs="--bootstrap /data/bootstrap.txt"
  fi

  log "Starting the Minecraft server..."

  finalArgs=(
    $JVM_XX_OPTS
    $JVM_OPTS
    $expandedDOpts
    -jar $SERVER
    "$@" $EXTRA_ARGS
  )

  if isTrue ${DEBUG_EXEC}; then
    set -x
  fi

  if isTrue ${EXEC_DIRECTLY:-false}; then
    exec java "${finalArgs[@]}"
  else
    exec mc-server-runner ${bootstrapArgs} ${mcServerRunnerArgs} java "${finalArgs[@]}"
  fi
fi