#!/bin/bash
# 隧道挂了，查原因并恢复。
set -u

RELAY_DIR=/root/lanremote-relay

echo "===== 1. 服务状态 ====="
systemctl status lanremote-tunnel --no-pager 2>&1 | head -10 | sed 's/^/  /'

echo
echo "===== 2. 进程 ====="
pgrep -a -f cloudflared | grep -v grep | sed 's/^/  /' || echo "  没有进程"

echo
echo "===== 3. 已注册的连接 ====="
grep -c 'Registered tunnel connection' "$RELAY_DIR/tunnel.log" 2>/dev/null | sed 's/^/  注册: /'
grep -c 'Connection terminated' "$RELAY_DIR/tunnel.log" 2>/dev/null | sed 's/^/  断开: /'
echo
echo "  最近的连接事件:"
grep -E 'Registered tunnel connection|Connection terminated|Unable to establish' \
    "$RELAY_DIR/tunnel.log" 2>/dev/null | tail -6 | sed 's/^/    /'

echo
echo "===== 4. 日志尾部 ====="
tail -8 "$RELAY_DIR/tunnel.log" 2>/dev/null | sed 's/^/  /'

echo
echo "===== 5. 到边缘的连通性 ====="
echo "  region1.v2.argotunnel.com 解析:"
getent ahostsv4 region1.v2.argotunnel.com | head -2 | sed 's/^/    /'
timeout 10 curl -4 -s -o /dev/null -w '    HTTP %{http_code}  %{time_total}s\n' \
    https://region1.v2.argotunnel.com 2>/dev/null || echo "    超时"
echo
echo "  UDP 7844 通吗（QUIC 用的端口）:"
timeout 8 bash -c 'echo > /dev/udp/198.41.200.113/7844' 2>/dev/null && echo "    能发出去" || echo "    发不出去"

echo
echo "===== 6. 重启隧道 ====="
systemctl restart lanremote-tunnel
rm -f "$RELAY_DIR/tunnel.log"
sleep 40
echo "  服务: $(systemctl is-active lanremote-tunnel)"
echo "  注册的连接: $(grep -c 'Registered tunnel connection' "$RELAY_DIR/tunnel.log" 2>/dev/null || echo 0)"
echo
echo "  日志尾部:"
tail -6 "$RELAY_DIR/tunnel.log" 2>/dev/null | sed 's/^/    /'

echo
echo "===== 7. 验证 ====="
OK=0
for i in $(seq 1 10); do
    C=$(timeout 20 curl -4 -s -o /dev/null -w '%{http_code}' \
        -H 'User-Agent: LanRemote/1.4.0' \
        https://relay.xxmxxs.top/v1/health 2>/dev/null)
    [ "$C" = "200" ] && { OK=$((OK + 1)); M="✓"; } || M="✗"
    printf "    %2d: %s HTTP %s\n" "$i" "$M" "${C:-超时}"
    sleep 3
done
echo "  成功 $OK / 10"