#!/usr/bin/env bash
# 安装/更新 systemd 定时任务（需要 sudo；幂等，可反复执行）
#
#   bash scripts/install_systemd.sh
#
# 做四件事：
#   1) 把 systemd/*.{service,timer} 装到 /etc/systemd/system/
#   2) 启用并启动 xwlb-daily.timer（每天 21:00 触发）
#   3) 启用 xwlb-tunnel.service（autossh 隧道，随开机自启）
#   4) 打印下一次触发时间
set -euo pipefail

DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
SUDO=""
if [ "$(id -u)" -ne 0 ]; then SUDO="sudo"; fi

echo "== 1/4 安装单元文件 =="
for unit in xwlb-daily.service xwlb-daily.timer xwlb-tunnel.service; do
    $SUDO install -m 0644 "$DIR/systemd/$unit" "/etc/systemd/system/$unit"
    echo "   $unit"
done

echo "== 2/4 daemon-reload =="
$SUDO systemctl daemon-reload

echo "== 3/4 启用定时器 =="
$SUDO systemctl enable --now xwlb-daily.timer >/dev/null
echo "   xwlb-daily.timer 已启用"

echo "== 4/4 隧道服务 =="
if ss -ltn 2>/dev/null | grep -q '127.0.0.1:13306'; then
    if systemctl is-active --quiet xwlb-tunnel.service; then
        $SUDO systemctl restart xwlb-tunnel.service
        echo "   xwlb-tunnel.service 已重启"
    else
        echo "   ⚠️  13306 已被**非 systemd 托管**的 autossh 占用，暂不启用隧道服务。"
        echo "      想改由 systemd 托管（可开机自启、断了自动重连）请执行："
        echo "        pkill -f 'autossh.*13306' && sudo systemctl enable --now xwlb-tunnel.service"
    fi
else
    $SUDO systemctl enable --now xwlb-tunnel.service >/dev/null
    echo "   xwlb-tunnel.service 已启用"
fi

echo
echo "== 下一次触发时间 =="
systemctl list-timers xwlb-daily.timer --no-pager || true
echo
echo "查看日志:  journalctl -u xwlb-daily -f      （也可看 $DIR/main.log）"
echo "立即试跑:  sudo systemctl start xwlb-daily.service"
echo "临时停用:  sudo systemctl disable --now xwlb-daily.timer"