#!/bin/bash
# 部署双实例版 watchdog（带预演和备份）
set -u

RELAY=/root/lanremote-relay
STAMP=$(date +%s)

echo "════════ 1. 备份现在的 watchdog ════════"
cp -a "$RELAY/watchdog.sh" "$RELAY/watchdog.sh.bak.$STAMP"
cp -a "$RELAY/watchdog.state" "$RELAY/watchdog.state.bak.$STAMP" 2>/dev/null || true
echo "  $RELAY/watchdog.sh.bak.$STAMP"
echo "  旧版行数: $(wc -l < "$RELAY/watchdog.sh")"

echo
echo "════════ 2. 装新版 ════════"
install -m 755 /tmp/wd_v4.sh "$RELAY/watchdog.sh"
echo "  新版行数: $(wc -l < "$RELAY/watchdog.sh")"
bash -n "$RELAY/watchdog.sh" && echo "  语法 OK"

echo
echo "════════ 3. 预演（DRY_RUN=1，不会真重启）════════"
echo "  当前实际状态:"
for p in 20241 20242; do
    n=$(curl -s --max-time 4 http://127.0.0.1:$p/metrics 2>/dev/null | grep '^cloudflared_tunnel_ha_connections' | awk '{print $2}')
    echo "    端口 $p: ${n:-无响应}"
done
echo "  预演输出:"
DRY_RUN=1 bash "$RELAY/watchdog.sh" 2>&1 | sed 's/^/    /'

echo
echo "════════ 4. 真跑一次（当前一切正常，应该什么都不做）════════"
bash "$RELAY/watchdog.sh" 2>&1 | sed 's/^/    /'
echo "  退出码: $?"

echo
echo "════════ 5. 状态文件 ════════"
cat "$RELAY/watchdog.state" 2>/dev/null | sed 's/^/    /'

echo
echo "════════ 6. 确认 timer 还在跑 ════════"
systemctl is-active lanremote-watchdog.timer | sed 's/^/  timer: /'
systemctl list-timers lanremote-watchdog.timer --no-pager 2>/dev/null | head -3 | sed 's/^/  /'

echo
echo "════════ 7. 等一轮 timer 触发，看日志 ════════"
sleep 30
tail -6 "$RELAY/watchdog.log" | sed 's/^/  /'

echo
echo "  备份路径: $RELAY/watchdog.sh.bak.$STAMP"