#!/usr/bin/env bash
set -euo pipefail

STEAMCMDDIR="${STEAMCMDDIR:-/opt/steamcmd}"
VALHEIMDIR="${VALHEIMDIR:-/opt/valheim}"
BACKUPDIR="${BACKUPDIR:-/backups}"
BEPINEX_URL="${BEPINEX_URL:-https://thunderstore.io/package/download/BepInExPack_Valheim/latest.zip}"

SERVER_NAME="${SERVER_NAME:-Valheim Server}"
WORLD_NAME="${WORLD_NAME:-Dedicated}"
SERVER_PASSWORD="${SERVER_PASSWORD:-changeme}"
PUBLIC="${PUBLIC:-1}"

install_valheim() {
  echo "[valheim] installing/updating via SteamCMD..."
  "${STEAMCMDDIR}/steamcmd.sh" +login anonymous \
    +force_install_dir "${VALHEIMDIR}" \
    +app_update 896660 validate \
    +quit
}

install_bepinex() {
  if [ -f "${VALHEIMDIR}/start_server_bepinex.sh" ]; then
    echo "[bepinex] already installed."
    return
  fi

  echo "[bepinex] downloading pack..."
  curl -L "${BEPINEX_URL}" -o /tmp/bepinex.zip
  unzip -q /tmp/bepinex.zip -d /tmp/bepinex
  cp -r /tmp/bepinex/* "${VALHEIMDIR}/"
  rm -rf /tmp/bepinex /tmp/bepinex.zip
}

backup_world() {
  echo "[backup] backing up world..."
  ts=$(date +"%Y-%m-%d_%H-%M-%S")
  mkdir -p "${BACKUPDIR}"
  cp "/config/worlds_local/${WORLD_NAME}.db" "${BACKUPDIR}/${WORLD_NAME}_${ts}.db"
  cp "/config/worlds_local/${WORLD_NAME}.fwl" "${BACKUPDIR}/${WORLD_NAME}_${ts}.fwl"
}

# Install/update
install_valheim
install_bepinex

# Background backup loop
while true; do
  sleep 3600
  backup_world
done &

cd "${VALHEIMDIR}"

echo "[valheim] starting server..."
exec ./start_server_bepinex.sh \
  -name "${SERVER_NAME}" \
  -port 2456 \
  -world "${WORLD_NAME}" \
  -password "${SERVER_PASSWORD}" \
  -public "${PUBLIC}"