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

STEAM_USER="steam"
STEAM_HOME="/home/steam"

STEAMCMD_DIR="${STEAM_HOME}/steamcmd"
ETS2_DIR="${STEAM_HOME}/ets2_sv"
ETS2_DOC_DIR="${STEAM_HOME}/ets2_doc"

ETS2_BIN_DIR="${ETS2_DIR}/bin/linux_x64"
SCRIPT_REPO="https://github.com/A-hxin/ets2_server.git"
TMP_SCRIPT_DIR="${ETS2_BIN_DIR}/server"

APP_ID="1948160"

echo "========================================"
echo "  ETS2 Dedicated Server 一键部署脚本"
echo "  System: Ubuntu"
echo "========================================"

if [ "$(id -u)" -ne 0 ]; then
  echo "请使用 root 权限执行："
  echo "sudo bash install_ets2_server.sh"
  exit 1
fi

echo
echo "一、创建 steam 用户"

if id "${STEAM_USER}" >/dev/null 2>&1; then
  echo "用户 ${STEAM_USER} 已存在，跳过创建"
else
  adduser \
    --system \
    --shell /bin/bash \
    --gecos 'Steam Service User' \
    --group \
    --disabled-password \
    --home "${STEAM_HOME}" \
    "${STEAM_USER}"

  echo "用户 ${STEAM_USER} 创建完成"
fi

echo
echo "二、创建工作目录"

mkdir -p "${STEAMCMD_DIR}" "${ETS2_DIR}" "${ETS2_DOC_DIR}"
chown -R "${STEAM_USER}:${STEAM_USER}" "${STEAM_HOME}"

echo "目录创建完成："
echo "${STEAMCMD_DIR}"
echo "${ETS2_DIR}"
echo "${ETS2_DOC_DIR}"

echo
echo "三、安装运行库"

dpkg --add-architecture i386 || true

apt update

apt install -y \
  curl \
  ca-certificates \
  tar \
  gzip \
  git \
  libc6:i386 \
  libstdc++6:i386 \
  libgcc-s1:i386 \
  libx11-6:i386 \
  libxext6:i386 \
  libxau6:i386 \
  libxdmcp6:i386 \
  libncurses5:i386 \
  libncursesw5:i386 \
  libcurl4:i386 \
  zlib1g:i386 \
  libbz2-1.0:i386 \
  libtinfo6:i386

echo
echo "四、下载 SteamCMD"

sudo -u "${STEAM_USER}" bash -c "
  cd '${STEAMCMD_DIR}' &&
  curl -sqL 'https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz' | tar zxvf -
"

chmod +x "${STEAMCMD_DIR}/steamcmd.sh" || true

echo
echo "五、安装 / 更新 ETS2 Dedicated Server"

sudo -u "${STEAM_USER}" bash -c "
  cd '${STEAMCMD_DIR}' &&
  '${STEAMCMD_DIR}/steamcmd.sh' \
    +force_install_dir '${ETS2_DIR}' \
    +login anonymous \
    +app_update '${APP_ID}' validate \
    +quit
"

echo
echo "六、安装 server.sh 管理脚本"

mkdir -p "${ETS2_BIN_DIR}"

rm -rf "${TMP_SCRIPT_DIR}"

sudo -u "${STEAM_USER}" git clone "${SCRIPT_REPO}" "${TMP_SCRIPT_DIR}"

if [ -f "${TMP_SCRIPT_DIR}/server.sh" ]; then
  mv "${TMP_SCRIPT_DIR}/server.sh" "${ETS2_BIN_DIR}/server.sh"
  chmod +x "${ETS2_BIN_DIR}/server.sh"
  rm -rf "${TMP_SCRIPT_DIR}"
else
  echo "错误：没有找到 server.sh"
  exit 1
fi

echo
echo "七、创建必要目录并设置权限"

mkdir -p "${ETS2_BIN_DIR}/logs"
mkdir -p "${ETS2_DOC_DIR}/Euro Truck Simulator 2"

chown -R "${STEAM_USER}:${STEAM_USER}" "${ETS2_BIN_DIR}"
chown -R "${STEAM_USER}:${STEAM_USER}" "${ETS2_DOC_DIR}"

chmod -R 775 "${ETS2_BIN_DIR}"
chmod -R 775 "${ETS2_DOC_DIR}"

echo
echo "八、创建快捷命令"

ln -sfn "${ETS2_BIN_DIR}/server.sh" /usr/local/bin/ets2_sv
chmod +x /usr/local/bin/ets2_sv

echo
echo "九、是否立即执行一次 server.sh 初始化？"

if [ -t 0 ]; then
  read -rp "是否现在执行一次？可能会进入服务器运行状态 [y/N]: " RUN_ONCE
  case "${RUN_ONCE}" in
    y|Y|yes|YES)
      echo "正在以 steam 用户执行 server.sh..."
      sudo -u "${STEAM_USER}" bash "${ETS2_BIN_DIR}/server.sh"
      ;;
    *)
      echo "已跳过首次执行"
      ;;
  esac
else
  echo "非交互环境，跳过首次执行"
fi

echo
echo "========================================"
echo "部署完成"
echo
echo "服务器目录："
echo "${ETS2_DIR}"
echo
echo "配置目录："
echo "${ETS2_DOC_DIR}/Euro Truck Simulator 2"
echo
echo "管理脚本："
echo "${ETS2_BIN_DIR}/server.sh"
echo
echo "快捷命令："
echo "ets2_sv"
echo
echo "如需设置 steam 用户密码："
echo "sudo passwd steam"
echo
echo "如需切换到 steam 用户："
echo "su - steam"
echo "========================================"