#!/bin/bash

# FUNCTIONS
function setServerProp {
  local prop=$1
  local var=$2
  if [ -n "$var" ]; then
    echo "Setting $prop to $var"
    sed -i "/$prop\s*=/ c $prop=$var" /data/server.properties
  fi
}

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

  if [ -n "$WHITELIST" ]; then
    echo "Creating whitelist"
    sed -i "/whitelist\s*=/ c whitelist=true" /data/server.properties
    sed -i "/white-list\s*=/ c white-list=true" /data/server.properties
  fi

  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"

  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 $LEVEL_TYPE in
      DEFAULT|FLAT|LARGEBIOMES|AMPLIFIED|CUSTOMIZED|BIOMESOP|RTG)
        sed -i "/level-type\s*=/ c level-type=$LEVEL_TYPE" /data/server.properties
        ;;
      *)
        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
    echo "Setting difficulty to $DIFFICULTY"
    sed -i "/difficulty\s*=/ c difficulty=$DIFFICULTY" /data/server.properties
  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

    sed -i "/^gamemode\s*=/ c gamemode=$MODE" $SERVER_PROPERTIES
  fi
fi

exec /start-minecraftFinalSetup $@