#!/bin/bash
# 确认 watchdog 能自动从服务配置里读出正确的端口
set -u

echo "════════ 1. 两个服务配置里的 --metrics ════════"
for svc in lanremote-tunnel lanremote-tunnel-h2; do
    p=$(systemctl cat "$svc" 2>/dev/null \
        | grep -oE '\-\-metrics[[:space:]]+[0-9.]+:[0-9]+' | head -1 \
        | grep -oE '[0-9]+$')
    echo "  $svc -> ${p:-（读不到）}"
done

echo
echo "════════ 2. 实际绑定的端口 ════════"
for p in $(pgrep cloudflared); do
    cg=$(cat /proc/$p/cgroup 2>/dev/null | head -1)
    svc=$(basename "$cg" 2>/dev/null | sed 's/\.service$//')
    port=$(ss -tlnp 2>/dev/null | grep "pid=$p" | grep -oE '2024[0-9]' | head -1)
    echo "  $svc -> ${port:-（没绑）}"
done

echo
echo "════════ 3. watchdog 预演（看它读到几个实例、什么端口）════════"
echo "  当前实际连接数:"
for port in 20241 20242; do
    n=$(curl -s --max-time 4 http://127.0.0.1:$port/metrics 2>/dev/null \
        | grep '^cloudflared_tunnel_ha_connections' | awk '{print $2}')
    echo "    端口 $port: ${n:-无响应}"
done
echo
echo "  预演输出（DRY_RUN=1）:"
DRY_RUN=1 bash /root/lanremote-relay/watchdog.sh 2>&1 | sed 's/^/    /'
echo "  （没有输出 = 一切正常，没触发任何重启 —— 这是对的）"

echo
echo "════════ 4. 构造一个"副实例掉线"的场景，看它认不认得出 ════════"
echo "  说明：不停真服务，直接把 watchdog 的端口指向一个没人听的端口来验证"
sed 's/:20242/:20299/' /root/lanremote-relay/watchdog.sh > /tmp/wd_fake.sh
DRY_RUN=1 bash /tmp/wd_fake.sh 2>&1 | sed 's/^/    /'
echo "  （期望：认出 lanremote-tunnel-h2 无响应，并只重启它）"