cloudflare-domain-manager/apps/api/src/services/vps-tracker-sync.ts

import { resolve4 } from "node:dns/promises";
import type { CfdmBindingSyncItem, ServiceBindingView } from "@cfdm/shared";
import { isIpLiteral } from "@cfdm/shared";
import type { Db } from "@cfdm/db";
import { repos, getAppSettingsSecrets, touchVpsTrackerSync } from "@cfdm/db";

function fqdnToDisplay(hostname: string, zoneName: string): string {
  if (hostname === "@" || !hostname.trim()) return zoneName;
  return `${hostname}.${zoneName}`;
}

function normalizeCnameHost(target: string, zoneName: string): string {
  const trimmed = target.trim().toLowerCase().replace(/\.$/, "");
  if (!trimmed) return "";
  if (trimmed.includes(".")) return trimmed;
  return `${trimmed}.${zoneName.toLowerCase()}`;
}

type BindingIpIndex = {
  byFqdn: Map<string, ServiceBindingView>;
};

function buildBindingIndex(bindings: ServiceBindingView[]): BindingIpIndex {
  const byFqdn = new Map<string, ServiceBindingView>();
  for (const b of bindings) {
    const fqdn = fqdnToDisplay(b.hostname, b.zone_name).toLowerCase();
    byFqdn.set(fqdn, b);
  }
  return { byFqdn };
}

/** Локальная цепочка CNAME → A (по bindings в CFDM), без внешнего DNS. */
function resolveIpsLocally(
  index: BindingIpIndex,
  startFqdn: string,
  depth = 0,
  seen = new Set<string>(),
): string[] {
  const key = startFqdn.toLowerCase().replace(/\.$/, "");
  if (!key || depth > 8 || seen.has(key)) return [];
  seen.add(key);

  const binding = index.byFqdn.get(key);
  if (!binding) return [];

  if (binding.target_ips.some(isIpLiteral)) {
    return binding.target_ips.filter(isIpLiteral);
  }

  const cname = binding.cname_target?.trim();
  if (!cname) return [];

  const next = normalizeCnameHost(cname, binding.zone_name);
  return resolveIpsLocally(index, next, depth + 1, seen);
}

async function resolveIpsViaDns(hostname: string): Promise<string[]> {
  const host = hostname.trim().toLowerCase().replace(/\.$/, "");
  if (!host) return [];
  try {
    // resolve4 следует по CNAME до A-записей
    return await resolve4(host);
  } catch {
    return [];
  }
}

/**
 * IP для матчинга в VPS Tracker:
 * 1) A/AAAA binding (только литералы IP — не CNAME hostname из dns_record.content)
 * 2) локальная CNAME-цепочка по другим bindings
 * 3) origin A/AAAA из dns_records CFDM
 * 4) IP сервиса
 * 5) публичный DNS — последний и обычно вреден (CF anycast при proxied)
 */
export async function resolveBindingIpsForSync(
  binding: ServiceBindingView,
  serviceIps: string[],
  index: BindingIpIndex,
  db?: Db,
): Promise<string[]> {
  const directIps = binding.target_ips.filter(isIpLiteral);
  if (directIps.length > 0) {
    return [...directIps];
  }

  const cname = binding.cname_target?.trim();
  if (cname) {
    const targetFqdn = normalizeCnameHost(cname, binding.zone_name);
    const local = resolveIpsLocally(index, targetFqdn).filter(isIpLiteral);
    if (local.length > 0) return local;

    if (db) {
      const fromTable = repos.listOriginIpsForFqdn(db, targetFqdn).filter(isIpLiteral);
      if (fromTable.length > 0) return fromTable;
    }
  }

  const fromService = serviceIps.filter(isIpLiteral);
  if (fromService.length > 0) return [...fromService];

  if (cname) {
    const targetFqdn = normalizeCnameHost(cname, binding.zone_name);
    const viaDns = (await resolveIpsViaDns(targetFqdn)).filter(isIpLiteral);
    if (viaDns.length > 0) return viaDns;
  }

  return [];
}

function cnameTargetForSync(binding: ServiceBindingView): string | undefined {
  const raw = binding.cname_target?.trim();
  if (!raw) return undefined;
  const normalized = normalizeCnameHost(raw, binding.zone_name);
  return normalized || undefined;
}

export async function buildServiceSyncBindingsAsync(
  db: Db,
  serviceId: number,
  deletedBindingIds: number[] = [],
): Promise<CfdmBindingSyncItem[]> {
  const service = repos.getService(db, serviceId);
  const serviceIps = repos.listServiceIps(db, serviceId);
  const allBindings = repos.listAllBindings(db);
  const index = buildBindingIndex(allBindings);
  const bindings = repos.listBindingsByService(db, serviceId);

  const items: CfdmBindingSyncItem[] = [];
  for (const binding of bindings) {
    const ips = await resolveBindingIpsForSync(binding, serviceIps, index, db);
    items.push({
      bindingId: binding.id,
      serviceId: service.id,
      serviceName: service.name,
      serviceSlug: service.slug,
      fqdn: fqdnToDisplay(binding.hostname, binding.zone_name),
      zoneName: binding.zone_name,
      hostname: binding.hostname,
      ips,
      cnameTarget: cnameTargetForSync(binding),
    });
  }

  for (const bindingId of deletedBindingIds) {
    items.push({
      bindingId,
      serviceId: service.id,
      serviceName: service.name,
      serviceSlug: service.slug,
      fqdn: "",
      zoneName: "",
      hostname: "",
      ips: [],
      deleted: true,
    });
  }

  return items;
}

export async function buildAllSyncBindings(
  db: Db,
): Promise<CfdmBindingSyncItem[]> {
  const bindings = repos.listAllBindings(db);
  const index = buildBindingIndex(bindings);
  const serviceIpCache = new Map<number, string[]>();

  const items: CfdmBindingSyncItem[] = [];
  for (const binding of bindings) {
    let serviceIps = serviceIpCache.get(binding.service_id);
    if (!serviceIps) {
      serviceIps = repos.listServiceIps(db, binding.service_id);
      serviceIpCache.set(binding.service_id, serviceIps);
    }
    const ips = await resolveBindingIpsForSync(binding, serviceIps, index, db);
    items.push({
      bindingId: binding.id,
      serviceId: binding.service_id,
      serviceName: binding.service_name,
      serviceSlug: binding.service_slug,
      fqdn: fqdnToDisplay(binding.hostname, binding.zone_name),
      zoneName: binding.zone_name,
      hostname: binding.hostname,
      ips,
      cnameTarget: cnameTargetForSync(binding),
    });
  }
  return items;
}

export async function syncServiceToVpsTracker(
  db: Db,
  serviceId: number,
  deletedBindingIds: number[] = [],
): Promise<void> {
  const config = getAppSettingsSecrets(db);
  if (!config.vpsTrackerSyncEnabled) return;

  const baseUrl = config.vpsTrackerUrl.replace(/\/$/, "");
  const token = config.vpsTrackerIntegrationToken;
  if (!baseUrl || !token) return;

  const bindings = await buildServiceSyncBindingsAsync(
    db,
    serviceId,
    deletedBindingIds,
  );
  if (bindings.length === 0) return;

  try {
    const res = await fetch(`${baseUrl}/api/integrations/cfdm/sync-bindings`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${token}`,
      },
      body: JSON.stringify({ bindings }),
    });
    if (res.ok) {
      touchVpsTrackerSync(db);
    } else {
      console.warn(
        `VPS Tracker sync failed (${res.status}): ${await res.text()}`,
      );
    }
  } catch (err) {
    console.warn(
      "VPS Tracker sync error:",
      err instanceof Error ? err.message : err,
    );
  }
}

export async function syncAllToVpsTracker(db: Db): Promise<{
  ok: boolean;
  count: number;
  error?: string;
}> {
  const config = getAppSettingsSecrets(db);
  if (!config.vpsTrackerSyncEnabled) {
    return { ok: false, count: 0, error: "Синхронизация выключена в CFDM" };
  }

  const baseUrl = config.vpsTrackerUrl.replace(/\/$/, "");
  const token = config.vpsTrackerIntegrationToken;
  if (!baseUrl) {
    return { ok: false, count: 0, error: "Укажите URL VPS Tracker" };
  }
  if (!token) {
    return { ok: false, count: 0, error: "Укажите integration token" };
  }

  const bindings = await buildAllSyncBindings(db);

  try {
    const res = await fetch(`${baseUrl}/api/integrations/cfdm/sync-bindings`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${token}`,
      },
      body: JSON.stringify({ bindings, fullSync: true }),
    });
    if (!res.ok) {
      const detail = await res.text();
      return {
        ok: false,
        count: 0,
        error: `VPS Tracker ${baseUrl} ответил HTTP ${res.status}: ${detail}`,
      };
    }
    touchVpsTrackerSync(db);
    return { ok: true, count: bindings.length };
  } catch (err) {
    const raw = err instanceof Error ? err.message : "Ошибка сети";
    return {
      ok: false,
      count: 0,
      error: `Не удалось отправить данные в VPS Tracker (${baseUrl}): ${raw}`,
    };
  }
}

export async function pingVpsTracker(db: Db): Promise<{
  ok: boolean;
  error?: string;
}> {
  const config = getAppSettingsSecrets(db);
  const baseUrl = config.vpsTrackerUrl.replace(/\/$/, "");
  const token = config.vpsTrackerIntegrationToken;
  if (!baseUrl) return { ok: false, error: "Укажите URL VPS Tracker" };
  if (!token) return { ok: false, error: "Укажите integration token" };

  try {
    const res = await fetch(`${baseUrl}/api/integrations/cfdm/ping`, {
      method: "POST",
      headers: { Authorization: `Bearer ${token}` },
    });
    if (!res.ok) {
      return {
        ok: false,
        error: `HTTP ${res.status}: ${await res.text()}`,
      };
    }
    return { ok: true };
  } catch (err) {
    return {
      ok: false,
      error: err instanceof Error ? err.message : "Ошибка сети",
    };
  }
}