#!/bin/bash
# 测看门狗的重启路径。
#
# 做法：把失败计数预置成 2，再跑一次 —— 应该触发第 3 次并重启隧道。
# 然后验证它有没有把隧道救回来。
set -u

RELAY_DIR=/root/lanremote-relay

echo "===== 1. 测之前的状态 ====="
echo "  失败计数: $(cat $RELAY_DIR/watchdog.state 2>/dev/null || echo 0)"
URL_BEFORE=$(cat "$RELAY_DIR/public_url.txt" 2>/dev/null || echo "")
echo "  公网地址: ${URL_BEFORE:-（无）}"
echo "  隧道服务: $(systemctl is-active lanremote-tunnel)"
echo "  隧道重启次数: $(systemctl show lanremote-tunnel -p NRestarts | cut -d= -f2)"

echo
echo "===== 2. 确认公网确实不通 ====="
if [ -n "$URL_BEFORE" ]; then
    C=$(timeout 20 curl -4 -s -o /dev/null -w '%{http_code}' \
        "$URL_BEFORE/v1/health" 2>/dev/null)
    echo "  从设备访问自己的公网地址: HTTP ${C:-超时}"
fi

echo
echo "===== 3. 把失败计数预置成 2，再跑一次看门狗 ====="
echo 2 > "$RELAY_DIR/watchdog.state"
echo "  预置完成（再失败一次就该重启了）"
echo
systemctl start lanremote-watchdog.service
echo "  看门狗已跑"

echo
echo "===== 4. 等它重启并拿到新地址 ====="
sleep 45
echo "  看门狗日志："
tail -6 "$RELAY_DIR/watchdog.log" 2>/dev/null | sed 's/^/    /'

echo
echo "  隧道重启次数: $(systemctl show lanremote-tunnel -p NRestarts | cut -d= -f2)"
URL_AFTER=$(cat "$RELAY_DIR/public_url.txt" 2>/dev/null || echo "")
echo "  新公网地址: ${URL_AFTER:-（还没拿到）}"

echo
echo "===== 5. 验证新地址通不通 ====="
if [ -n "$URL_AFTER" ]; then
    OK=0
    for i in 1 2 3 4 5; do
        C=$(timeout 20 curl -4 -s -o /dev/null -w '%{http_code}' \
            "$URL_AFTER/v1/health" 2>/dev/null)
        printf "    第 %d 次: HTTP %s\n" "$i" "${C:-超时}"
        if [ "$C" = "200" ]; then OK=1; break; fi
        sleep 8
    done
    echo
    if [ "$OK" = "1" ]; then
        echo "  ✓ 看门狗把隧道救回来了"
        if [ "$URL_BEFORE" != "$URL_AFTER" ]; then
            echo "    地址变了: $URL_BEFORE"
            echo "           -> $URL_AFTER"
            echo "    （匿名隧道就这样，用户从 http://192.168.2.156:8080/url 查新地址）"
        fi
    else
        echo "  ✗ 新地址还是不通（这条线路对匿名隧道就是不友好）"
    fi
fi