#!/bin/bash
# 查为什么管理页 / 经隧道返回 502，但 /v1/health 正常。
#
# 502 = Cloudflare 拿不到源站响应。如果本地直接访问 / 也不行，
# 那就是中转渲染管理页有问题，跟隧道无关。
set -u

BASE=http://127.0.0.1:8080

echo "===== 1. 本地直接访问 / ====="
OUT=$(timeout 15 curl -s -w '\n%{http_code} %{size_download} %{time_total}' "$BASE/" 2>/dev/null)
CODE=$(echo "$OUT" | tail -1)
echo "  状态/大小/耗时: $CODE"
echo "  内容开头:"
echo "$OUT" | head -c 200 | sed 's/^/    /'
echo

echo "===== 2. 本地访问 /v1/health 对比 ====="
OUT2=$(timeout 15 curl -s -w '\n%{http_code} %{size_download} %{time_total}' "$BASE/v1/health" 2>/dev/null)
echo "  状态/大小/耗时: $(echo "$OUT2" | tail -1)"
echo

echo "===== 3. 本地访问 /?key=管理钥匙 ====="
KEY=$(cat /root/lanremote-relay/data/admin_key.txt 2>/dev/null)
OUT3=$(timeout 15 curl -s -w '\n%{http_code} %{size_download} %{time_total}' "$BASE/?key=$KEY" 2>/dev/null)
echo "  状态/大小/耗时: $(echo "$OUT3" | tail -1)"
echo "  内容开头:"
echo "$OUT3" | head -c 200 | sed 's/^/    /'
echo

echo "===== 4. 经隧道访问 / ====="
for i in 1 2 3; do
    OUT4=$(timeout 25 curl -4 -s -w '\n%{http_code} %{size_download} %{time_total}' \
           -H 'User-Agent: LanRemote/1.4.0' https://relay.xxmxxs.top/ 2>/dev/null)
    printf "  第 %d 次: %s\n" "$i" "$(echo "$OUT4" | tail -1)"
    sleep 3
done

echo
echo "===== 5. 经隧道访问 /v1/health ====="
for i in 1 2 3; do
    C=$(timeout 20 curl -4 -s -o /dev/null -w '%{http_code}' \
        -H 'User-Agent: LanRemote/1.4.0' https://relay.xxmxxs.top/v1/health 2>/dev/null)
    printf "  第 %d 次: HTTP %s\n" "$i" "${C:-超时}"
    sleep 2
done

echo
echo "===== 6. 中转日志尾部（有没有异常）====="
tail -15 /root/lanremote-relay/relay.log 2>/dev/null | sed 's/^/  /' || echo "  （没有日志）"

echo
echo "===== 7. 中转进程 ====="
systemctl is-active lanremote-relay
ps -o rss=,etime=,cmd= -p "$(systemctl show lanremote-relay -p MainPID | cut -d= -f2)" 2>/dev/null | sed 's/^/  /'

echo
echo "===== 8. 结论 ====="
LOCAL_CODE=$(timeout 15 curl -s -o /dev/null -w '%{http_code}' "$BASE/" 2>/dev/null)
TUNNEL_CODE=$(timeout 25 curl -4 -s -o /dev/null -w '%{http_code}' \
              -H 'User-Agent: LanRemote/1.4.0' https://relay.xxmxxs.top/ 2>/dev/null)
echo "  本地 / -> $LOCAL_CODE"
echo "  隧道 / -> $TUNNEL_CODE"
if [ "$LOCAL_CODE" = "200" ] && [ "$TUNNEL_CODE" != "200" ]; then
    echo "  -> 本地好的，隧道不行。管理页比 health 大，"
    echo "     可能是这条线路传大响应不稳定。"
elif [ "$LOCAL_CODE" != "200" ]; then
    echo "  -> 本地就不行，是中转的问题"
fi