#!/bin/bash
# 看 watchdog 到底按什么节奏在重启，以及是不是过度重启
set -u

echo "════════ 1. watchdog 最近 30 行 ════════"
tail -30 /root/lanremote-relay/watchdog.log 2>/dev/null | sed 's/^/  /'

echo
echo "════════ 2. 本次开机以来所有"重启隧道"记录 ════════"
grep -E '重启 \[' /root/lanremote-relay/watchdog.log 2>/dev/null | tail -25 | sed 's/^/  /'

echo
echo "════════ 3. 重启的间隔（判断是不是过频）════════"
grep -E '重启 \[' /root/lanremote-relay/watchdog.log 2>/dev/null \
    | grep -oE '^\[[0-9-]+ [0-9:]+' | sed 's/\[//' \
    | awk '{
        cmd = "date -d \"" $0 "\" +%s"
        cmd | getline ts; close(cmd)
        if (prev) printf "  %s  (+%d 秒)\n", $0, ts - prev
        else printf "  %s\n", $0
        prev = ts
    }' | tail -25

echo
echo "════════ 4. 每次重启的原因分类 ════════"
grep -E '重启 \[' /root/lanremote-relay/watchdog.log 2>/dev/null \
    | sed -E 's/^\[[0-9-]+ [0-9:]+\] //' \
    | sed -E 's/（距上次 [0-9]+ 秒）//' \
    | sed -E 's/\|/ | /g' \
    | awk -F'——' '{print $1}' | sed 's/[0-9]\+ 次/N 次/' \
    | sort | uniq -c | sort -rn | head -12 | sed 's/^/  /'

echo
echo "════════ 5. 服务重启计数（systemd 层面）════════"
for svc in lanremote-tunnel lanremote-tunnel-h2; do
    n=$(journalctl -u "$svc" --since '3 hours ago' --no-pager 2>/dev/null | grep -c 'Starting')
    echo "  $svc 最近 3 小时启动 $n 次"
done

echo
echo "════════ 6. 最近 1 小时的完整 watchdog 活动 ════════"
awk '/\[10-07 (1[78]):/' /root/lanremote-relay/watchdog.log 2>/dev/null | tail -25 | sed 's/^/  /'

echo
echo "════════ 7. 当前状态 ════════"
echo "  watchdog: $(systemctl is-active lanremote-watchdog.timer)"
echo "  状态文件: $(cat /root/lanremote-relay/watchdog.state 2>/dev/null | tr '\n' ' ')"
echo "  上次重启: $(date -d @$(cat /root/lanremote-relay/watchdog.last_restart 2>/dev/null || echo 0) '+%Y-%m-%d %H:%M:%S' 2>/dev/null)"
echo "  现在: $(date '+%Y-%m-%d %H:%M:%S')"
echo "  连接数: quic=$(curl -s --max-time 4 http://127.0.0.1:20241/metrics 2>/dev/null | grep ha_connections | awk '{print $2}') http2=$(curl -s --max-time 4 http://127.0.0.1:20242/metrics 2>/dev/null | grep ha_connections | awk '{print $2}')"
echo "  长测进度: 健康 $(wc -l < /root/long2h_health.tsv) 条, 轮询 $(wc -l < /root/rp_poll30.tsv) / 30"