#!/bin/bash
# 严格验证：chunked 修复之后，稳定性到底改善了没有。
#
# 之前（修之前）的实测基线：
#     QUIC  ha=1        48%
#     HTTP2 ha=1      35~65%
#     HTTP2 ha=2      60~75%
#     长轮询 60 次只成功 18 次（30%），而且是"跑着跑着全挂"
#
# 现在跑 5 分钟，看：
#     1. 公网可用率
#     2. 隧道断开次数
#     3. 日志里还有没有 502 / Unsolicited response
set -u

RELAY_DIR=/root/lanremote-relay
URL=https://relay.xxmxxs.top

echo "===== 起点状态 ====="
echo "  隧道: $(systemctl is-active lanremote-tunnel)"
echo "  连接数: $(curl -s --max-time 5 http://127.0.0.1:20241/metrics | grep '^cloudflared_tunnel_ha_connections' | awk '{print $2}')"

# 清空日志，从干净状态开始统计
: > "$RELAY_DIR/tunnel.log"
echo "  （已清空隧道日志，重新计数）"

echo
echo "===== 连续探 5 分钟（每 3 秒一次，共 100 次）====="
ok=0; bad=0
for i in $(seq 1 100); do
    c=$(timeout 12 curl -4 -s -o /dev/null -w '%{http_code}' \
        -H 'User-Agent: LanRemote/1.4.0' "$URL/v1/health" 2>/dev/null)
    c=${c:-000}
    if [ "$c" = "200" ]; then
        ok=$((ok + 1))
    else
        bad=$((bad + 1))
        printf "  [%3ds] 不通 %s\n" "$((i * 3))" "$c"
    fi
    sleep 3
done

echo
echo "===== 结果 ====="
echo "  公网可用 $ok/100 = $((ok))%"

echo
echo "  隧道统计（这 5 分钟内）："
echo "    注册 $(grep -c 'Registered tunnel connection' "$RELAY_DIR/tunnel.log" 2>/dev/null || echo 0) 次"
echo "    断开 $(grep -c 'Connection terminated' "$RELAY_DIR/tunnel.log" 2>/dev/null || echo 0) 次"
echo "    Lost edge $(grep -c 'Lost connection with the edge' "$RELAY_DIR/tunnel.log" 2>/dev/null || echo 0) 次"
echo "    Unsolicited（那条 400 污染）$(grep -c 'Unsolicited response' "$RELAY_DIR/tunnel.log" 2>/dev/null || echo 0) 次"
echo "    Bad request syntax $(grep -c 'Bad request syntax' "$RELAY_DIR/tunnel.log" 2>/dev/null || echo 0) 次"

echo
echo "  看门狗这段时间的动作："
tail -5 "$RELAY_DIR/watchdog.log" 2>/dev/null | sed 's/^/    /'

echo
echo "===== 对比修之前 ====="
echo "    修之前：48% ~ 70%（而且长轮询跑几十次就全挂）"
echo "    修之后：$ok%"
if [ "$ok" -ge 95 ]; then
    echo "    ✓ 达标（≥95%）"
elif [ "$ok" -ge 85 ]; then
    echo "    ~ 明显改善"
else
    echo "    ✗ 还没解决"
fi