#!/bin/bash
# 测"开机 -> 服务可用"要多久，看能不能缩短
set -u

echo "════════ 1. 系统启动耗时 ════════"
systemd-analyze 2>/dev/null | sed 's/^/  /'
echo
echo "  最慢的几项:"
systemd-analyze blame 2>/dev/null | head -12 | sed 's/^/  /'

echo
echo "════════ 2. 关键服务的启动时刻 ════════"
BOOT=$(date -d "$(uptime -s)" +%s 2>/dev/null || echo 0)
for svc in lanremote-nettune lanremote-relay lanremote-tunnel; do
    ts=$(systemctl show "$svc" -p ActiveEnterTimestampMonotonic --value 2>/dev/null)
    if [ -n "$ts" ] && [ "$ts" != "0" ]; then
        sec=$((ts / 1000000))
        printf "  %-24s 开机后 %s 秒\n" "$svc" "$sec"
    else
        printf "  %-24s （读不到）\n" "$svc"
    fi
done

echo
echo "════════ 3. 隧道是什么时候连上的 ════════"
grep -m3 'Registered tunnel connection' /root/lanremote-relay/tunnel.log 2>/dev/null \
    | sed 's/^/  /'
echo "  当前时间: $(date -u '+%Y-%m-%dT%H:%M:%SZ')"
echo "  日志里第一条注册时间戳对比一下就知道隔了多久"

echo
echo "════════ 4. 开机第一条日志到隧道可用，中间卡在哪 ════════"
journalctl -b --no-pager 2>/dev/null \
    | grep -E 'lanremote|cloudflared|Reached target network|Startup finished' \
    | head -20 | sed 's/^/  /'

echo
echo "════════ 5. network-online.target 花了多久 ════════"
journalctl -b --no-pager -u NetworkManager -u systemd-networkd 2>/dev/null \
    | grep -iE 'online|carrier|dhcp|connected' | head -8 | sed 's/^/  /'

echo
echo "════════ 6. 有没有办法提前（当前依赖链）════════"
systemctl show lanremote-tunnel -p After -p Wants -p Requires --value 2>/dev/null | sed 's/^/  /'

echo
echo "════════ 7. watchdog 间隔现在是多久 ════════"
grep -E 'OnUnitActiveSec|OnBootSec' /etc/systemd/system/lanremote-watchdog.timer 2>/dev/null | sed 's/^/  /'
systemctl cat lanremote-watchdog.timer 2>/dev/null | grep -E 'OnUnit|OnBoot' | sed 's/^/  /'