#!/bin/bash
# 装看门狗：systemd service + timer，每 5 分钟检查一次隧道。
set -u

RELAY_DIR=/root/lanremote-relay

echo "===== 1. 装脚本 ====="
chmod +x "$RELAY_DIR/watchdog.sh"
ls -la "$RELAY_DIR/watchdog.sh" | sed 's/^/  /'

echo
echo "===== 2. 一次性服务 ====="
cat > /etc/systemd/system/lanremote-watchdog.service <<EOF
[Unit]
Description=LanRemote 隧道看门狗（检查公网可达性）
After=lanremote-relay.service lanremote-tunnel.service

[Service]
Type=oneshot
ExecStart=/bin/bash $RELAY_DIR/watchdog.sh
MemoryMax=64M
StandardOutput=append:$RELAY_DIR/watchdog.log
StandardError=append:$RELAY_DIR/watchdog.log
EOF

echo
echo "===== 3. 每 5 分钟跑一次 ====="
cat > /etc/systemd/system/lanremote-watchdog.timer <<EOF
[Unit]
Description=每 5 分钟检查一次隧道

[Timer]
OnBootSec=3min
OnUnitActiveSec=5min
AccuracySec=30s
Unit=lanremote-watchdog.service

[Install]
WantedBy=timers.target
EOF

systemctl daemon-reload
systemctl enable lanremote-watchdog.timer >/dev/null 2>&1
systemctl start lanremote-watchdog.timer
echo "  已启用"

echo
echo "===== 4. 立刻跑一次看效果 ====="
systemctl start lanremote-watchdog.service
sleep 30
echo "  看门狗日志："
tail -5 "$RELAY_DIR/watchdog.log" 2>/dev/null | sed 's/^/    /' || echo "    （还没有输出）"

echo
echo "===== 5. 定时器状态 ====="
systemctl list-timers lanremote-watchdog.timer --no-pager 2>/dev/null | head -3 | sed 's/^/  /'

echo
echo "===== 6. 当前状态 ====="
echo "  看门狗记录: $(cat $RELAY_DIR/watchdog.state 2>/dev/null || echo '（还没写）')"
echo "  公网地址:   $(cat $RELAY_DIR/public_url.txt 2>/dev/null)"
echo "  隧道服务:   $(systemctl is-active lanremote-tunnel)"