#!/bin/bash
# 看隧道当前配置，并做一轮协议/连接数的对照实测。
set -u

echo "════════ 1. 隧道服务当前参数 ════════"
grep -E 'ExecStart' /etc/systemd/system/lanremote-tunnel.service | sed 's/^/  /'

echo
echo "════════ 2. cloudflared 版本 & 支持的参数 ════════"
cloudflared --version 2>&1 | head -1 | sed 's/^/  /'
echo "  --- 和丢包恢复相关的参数:"
cloudflared tunnel run --help 2>&1 | grep -E 'protocol|ha-connections|edge-ip-version|region|retries' | sed 's/^/    /'

echo
echo "════════ 3. 当前落点 ════════"
curl -s --max-time 5 http://127.0.0.1:20241/metrics 2>/dev/null \
    | grep 'server_locations.*} 1' | sed 's/^/  /'

echo
echo "════════ 4. 测一轮公网（12 次，记录耗时分布）════════"
times=()
ok=0
for i in $(seq 1 12); do
    out=$(curl -s -o /dev/null -w '%{http_code} %{time_total}' --max-time 25 \
          -H 'User-Agent: LanRemote/1.8.0' https://relay.xxmxxs.top/v1/health)
    code=$(echo "$out" | awk '{print $1}')
    ms=$(echo "$out" | awk '{printf "%d", $2*1000}')
    times+=("$ms")
    [ "$code" = "200" ] && ok=$((ok+1))
    printf "  %2d: HTTP %-4s %5sms\n" "$i" "$code" "$ms"
    sleep 1
done
echo "  可用 $ok/12"
echo "  耗时: $(printf '%s\n' "${times[@]}" | sort -n | awk '{a[NR]=$1} END {printf "最小 %dms  中位 %dms  最大 %dms", a[1], a[int(NR/2)+1], a[NR]}')"

echo
echo "════════ 5. 每个候选 edge IP 的可达性（挑最快的）════════"
python3 - <<'PY'
import socket, time
ips = ["198.41.192.47", "198.41.192.57", "198.41.192.67", "198.41.192.107",
       "198.41.192.167", "198.41.192.227", "198.41.200.23", "198.41.200.33",
       "198.41.200.43", "198.41.200.63", "198.41.200.113", "198.41.200.193"]
rows = []
for ip in ips:
    s = socket.socket(); s.settimeout(4)
    t = time.perf_counter()
    try:
        s.connect((ip, 7844))
        ms = (time.perf_counter() - t) * 1000
        rows.append((ms, ip, "通"))
    except OSError as e:
        rows.append((99999, ip, "不通"))
    finally:
        s.close()
rows.sort()
for ms, ip, st in rows:
    if st == "通":
        print("    %-16s %6.0f ms" % (ip, ms))
    else:
        print("    %-16s 不通" % ip)
good = [r for r in rows if r[2] == "通"]
print("    => %d/%d 可达，最快 %s" % (len(good), len(rows), good[0][1] if good else "无"))
PY

echo
echo "════════ 6. 隧道日志里 i/o timeout 的最近频率 ════════"
for kw in 'Registered tunnel connection' 'Lost connection' 'i/o timeout' 'context deadline'; do
    n=$(tail -800 /root/lanremote-relay/tunnel.log 2>/dev/null | grep -c "$kw")
    printf "  %-34s %s 次（最近 800 行）\n" "$kw" "$n"
done