#!/bin/bash

# FUNCTIONS
function setServerProp {
  local prop=$1
  local var=$2
  if [ -n "$var" ]; then
    # normalize booleans
    case ${var^^} in
      TRUE|FALSE)
        var=${var,,} ;;
    esac
    echo "Setting ${prop} to '${var}' in ${SERVER_PROPERTIES}"
    sed -i "/^${prop}\s*=/ c ${prop}=${var}" $SERVER_PROPERTIES
  else
    echo "Skip setting ${prop}"
  fi
}

# Deploy server.properties file
if [ ! -e $SERVER_PROPERTIES ]; then
  echo "Creating server.properties in ${SERVER_PROPERTIES}"
  cp /tmp/server.properties $SERVER_PROPERTIES

  if [[ ${TYPE} == "FEED-THE-BEAST" ]]; then
    export SERVER_PROPERTIES=${FTB_DIR}/server.properties
    echo "detected FTB, changing properties path to ${SERVER_PROPERTIES}"
    cp /tmp/server.properties $SERVER_PROPERTIES
  fi

  if [ -n "$WHITELIST" ]; then
    echo "Creating whitelist"
    setServerProp "whitelist" "true"
    setServerProp "white-list" "true"
  fi

  # If not provided, generate a reasonable default message-of-the-day,
  # which shows up in the server listing in the client
  if [ -z $MOTD ]; then
    # snapshot is the odd case where we have to look at version to identify that label
    if [[ ${ORIGINAL_TYPE} == "VANILLA" && ${VERSION} == "SNAPSHOT" ]]; then
      label=SNAPSHOT
    else
      label=${ORIGINAL_TYPE}
    fi

    # Convert label to title-case
    label=${label,,}
    label=${label^}
    MOTD="A ${label} Minecraft Server powered by Docker"
  fi

  setServerProp "server-port" "$SERVER_PORT"
  setServerProp "motd" "$MOTD"
  setServerProp "allow-nether" "$ALLOW_NETHER"
  setServerProp "announce-player-achievements" "$ANNOUNCE_PLAYER_ACHIEVEMENTS"
  setServerProp "enable-command-block" "$ENABLE_COMMAND_BLOCK"
  setServerProp "spawn-animals" "$SPAWN_ANIMALS"
  setServerProp "spawn-monsters" "$SPAWN_MONSTERS"
  setServerProp "spawn-npcs" "$SPAWN_NPCS"
  setServerProp "generate-structures" "$GENERATE_STRUCTURES"
  setServerProp "view-distance" "$VIEW_DISTANCE"
  setServerProp "hardcore" "$HARDCORE"
  setServerProp "max-build-height" "$MAX_BUILD_HEIGHT"
  setServerProp "force-gamemode" "$FORCE_GAMEMODE"
  setServerProp "hardmax-tick-timecore" "$MAX_TICK_TIME"
  setServerProp "enable-query" "$ENABLE_QUERY"
  setServerProp "query.port" "$QUERY_PORT"
  setServerProp "enable-rcon" "$ENABLE_RCON"
  setServerProp "rcon.password" "$RCON_PASSWORD"
  setServerProp "rcon.port" "$RCON_PORT"
  setServerProp "max-players" "$MAX_PLAYERS"
  setServerProp "max-world-size" "$MAX_WORLD_SIZE"
  setServerProp "level-name" "$LEVEL"
  setServerProp "level-seed" "$SEED"
  setServerProp "pvp" "$PVP"
  setServerProp "generator-settings" "$GENERATOR_SETTINGS"
  setServerProp "online-mode" "$ONLINE_MODE"
  setServerProp "allow-flight" "$ALLOW_FLIGHT"

  if [ -n "$LEVEL_TYPE" ]; then
    # normalize to uppercase
    LEVEL_TYPE=$( echo ${LEVEL_TYPE} | tr '[:lower:]' '[:upper:]' )
    echo "Setting level type to $LEVEL_TYPE"
    # check for valid values and only then set
    case $LEVEL_TYPE in
      DEFAULT|FLAT|LARGEBIOMES|AMPLIFIED|CUSTOMIZED|BIOMESOP|RTG)
        setServerProp "level-type" "$LEVEL_TYPE"
        ;;
      *)
        echo "Invalid LEVEL_TYPE: $LEVEL_TYPE"
        exit 1
        ;;
    esac
  fi

  if [ -n "$DIFFICULTY" ]; then
    case $DIFFICULTY in
      peaceful|0)
        DIFFICULTY=0
        ;;
      easy|1)
        DIFFICULTY=1
        ;;
      normal|2)
        DIFFICULTY=2
        ;;
      hard|3)
        DIFFICULTY=3
        ;;
      *)
        echo "DIFFICULTY must be peaceful, easy, normal, or hard."
        exit 1
        ;;
    esac
    setServerProp "difficulty" "$DIFFICULTY"
  fi

  if [ -n "$MODE" ]; then
    echo "Setting mode"
    MODE_LC=$( echo $MODE | tr '[:upper:]' '[:lower:]' )
    case $MODE_LC in
      0|1|2|3)
        ;;
      su*)
        MODE=0
        ;;
      c*)
        MODE=1
        ;;
      a*)
        MODE=2
        ;;
      sp*)
        MODE=3
        ;;
      *)
        echo "ERROR: Invalid game mode: $MODE"
        exit 1
        ;;
    esac
    setServerProp "gamemode" "$MODE"
  fi
else
  echo "server.properties already created, skipping"
fi

exec /start-minecraftFinalSetup $@