export async function prepareEmbeddedRelations(page) {
  // Grafo sintético de lectura para L04.3. Solo lo ejecuta el cliente MCP de pruebas.
  const f = page.adoption;
  const companyId = f.detail.company.id;
  const inventory = f.inventory;
  const resources = f.snapshots[`/resources/${companyId}`].resources;
  const actorId = inventory.assets[0].history[0].actorId;
  const asset = inventory.assets.find((a) => a.id === page.embedded.asset);
  const domain = resources.find((r) => r.directory);
  const smb = resources.find((r) => r.networkShare);
  let sequence = 1000;

  const uuid = () => `019a4300-0000-7000-b000-${String(++sequence).padStart(12, "0")}`;

  const shares = Array.from({ length: 50 }, (_, i) => {
    const result = structuredClone(smb);
    const name = `L043-SHARE-${String(i + 1).padStart(2, "0")} · Administración Peña`;
    const address = result.networkShare.address
      .replace(result.networkShare.host, asset.values.name)
      .replace(result.networkShare.shareName, `L043-area-${i + 1}`);
    const old = result.networkShare.address;

    result.id = uuid();
    result.values.name = name;
    result.values.characteristics = Object.fromEntries(
      Object.entries(result.values.characteristics).map(([key, value]) => [
        key,
        value === old ? address : value === smb.networkShare.host ? asset.values.name : value,
      ])
    );
    result.networkShare = {
      ...result.networkShare,
      address,
      normalizedAddress: address.toLowerCase(),
      host: asset.values.name,
      shareName: `L043-area-${i + 1}`,
    };
    result.history = [{ ...result.history[0], id: uuid(), values: structuredClone(result.values) }];

    return result;
  });

  resources.push(...shares);

  const reference = (providerId, id) => ({
    providerId,
    entityType: providerId === "assets" ? "assets:asset" : "resources:resource",
    id,
    companyId,
  });

  const summary = (ref, name, subtitle) => ({
    status: "resolved",
    summary: { reference: ref, name, subtitle },
  });

  const publications = shares.map((r) => ({
    id: uuid(),
    companyId,
    assetId: asset.id,
    resourceId: r.id,
    predecessorId: null,
    startedAt: "2026-03-01T10:00:00.000Z",
    startedBy: actorId,
    endedAt: null,
    endedBy: null,
  }));
  const history = shares.slice(0, 25).map((r) => ({
    id: uuid(),
    companyId,
    assetId: asset.id,
    resourceId: r.id,
    predecessorId: null,
    startedAt: "2026-02-01T10:00:00.000Z",
    startedBy: actorId,
    endedAt: "2026-02-10T10:00:00.000Z",
    endedBy: actorId,
  }));
  const computers = inventory.assets
    .filter((a) => a.values.status === "operational" && a.specification.templateName === "Portátil")
    .slice(0, 50);
  const memberships = computers.map((a) => ({
    typeId: "assets:directory-membership",
    origin: { kind: "record", id: uuid() },
    source: reference("assets", a.id),
    target: reference("resources", domain.id),
    stateCode: "active",
    roleCode: "member",
  }));

  const publicationView = (p) => ({
    typeId: "assets:network-share-publication",
    origin: { kind: "record", id: p.id },
    source: reference("assets", p.assetId),
    target: reference("resources", p.resourceId),
    stateCode: p.endedAt ? "ended" : "active",
  });

  const summaries = (items, fromAsset) =>
    items.map((item) => {
      const ref = fromAsset ? item.target : item.source;
      const entity = (fromAsset ? resources : inventory.assets).find((e) => e.id === ref.id);

      return summary(
        ref,
        entity.values.name,
        fromAsset
          ? (entity.networkShare?.address ?? entity.directory?.normalizedDns ?? "")
          : entity.specification.templateName
      );
    });

  const slice = (items, cursor, size = 20) => {
    const offset = cursor ? items.findIndex((x) => (x.origin?.id ?? x.id) === cursor) + 1 : 0;
    const values = items.slice(offset, offset + size);

    return {
      items: values,
      nextCursor:
        offset + size < items.length ? (values.at(-1).origin?.id ?? values.at(-1).id) : null,
    };
  };

  page.embeddedData = {
    shares,
    domain: domain.id,
    publications,
    memberships,
    requests: [],
    fault: null,
    held: null,
    removed: null,
    publicationResponse: null,
    directoryResponse: null,
    releases: [],
  };
  page.embedded.release = () => page.embeddedData.release?.();
  const endpoint = `${page.adoptionOrigin}/api/asset-network-share-publications/${companyId}`;

  async function publicationResponse(route, _url, params) {
    const d = page.embeddedData;

    const fromAsset = params.get("anchorType") === "assets:asset";
    const anchor = params.get("anchorId");
    const periods = (
      params.get("includeEnded") === "true" ? [...history, ...publications] : publications
    ).filter((p) => (fromAsset ? p.assetId : p.resourceId) === anchor && p.id !== d.removed);
    const pg = slice(periods, params.get("cursor"), Number(params.get("pageSize")));
    const items = pg.items.map(publicationView);
    const response = {
      page: { items, nextCursor: pg.nextCursor },
      summaries: summaries(items, fromAsset),
      publications: pg.items,
    };

    d.publicationResponse = response;
    if (d.fault === "publications") {
      return route.fulfill({ status: 503, json: { code: "INTERNAL_ERROR" } });
    }
    if (d.fault === "denied") {
      return route.fulfill({ status: 403, json: { code: "FORBIDDEN" } });
    }
    if (d.fault === "hold-publications") {
      await new Promise((resolve) => {
        d.release = resolve;
        d.releases.push(resolve);
      });
    }

    return route.fulfill({ json: response });
  }

  async function optionResponse(route, url, params) {
    const d = page.embeddedData;
    const kind = url.pathname.endsWith("/asset-options") ? "asset" : "share";
    const search = params.get("search") ?? "";
    const cursor = params.get("cursor");
    const items = (
      kind === "asset"
        ? inventory.assets
            .filter((a) => a.values.status === "operational")
            .map((a) => ({
              id: a.id,
              name: a.values.name,
              templateName: a.specification.templateName,
              status: a.values.status,
            }))
        : shares.map((r) => ({ id: r.id, name: r.values.name, address: r.networkShare.address }))
    ).filter((x) =>
      `${x.name} ${x.address ?? ""}`.toLowerCase().includes(search.trim().toLowerCase())
    );
    const response = slice(items, cursor);

    if (d.fault === "options") {
      return route.fulfill({ status: 503, json: { code: "INTERNAL_ERROR" } });
    }
    if (search === "ANTIGUA") {
      d.held = true;
      await new Promise((resolve) => {
        d.release = resolve;
        d.releases.push(resolve);
      });
      // Una respuesta antigua contiene una opción distinguible, aunque su petición haya sido cancelada.
      response.items = [
        { id: shares[0].id, name: "RESPUESTA ANTIGUA", address: shares[0].networkShare.address },
      ];
    }
    try {
      await route.fulfill({ json: response });
    } catch (error) {
      if (!(String(error).includes("intercepted") || String(error).includes("Target page"))) {
        throw error;
      }
      d.requests.push({ aborted: search });
    }
  }

  await page.route(`${endpoint}/**`, async (route) => {
    if (route.request().method() !== "GET") {
      return route.fallback();
    }
    const url = new URL(route.request().url());

    page.embeddedData.requests.push({
      path: url.pathname,
      query: Object.fromEntries(url.searchParams),
    });

    return url.pathname.endsWith("/relationships")
      ? publicationResponse(route, url, url.searchParams)
      : optionResponse(route, url, url.searchParams);
  });
  await page.route(
    `${page.adoptionOrigin}/api/asset-directory-memberships/${companyId}/**`,
    async (route) => {
      if (route.request().method() !== "GET") {
        return route.fallback();
      }
      const url = new URL(route.request().url());
      const p = url.searchParams;

      page.embeddedData.requests.push({ path: url.pathname, query: Object.fromEntries(p) });
      if (url.pathname.endsWith("/eligibility")) {
        const id = url.pathname.split("/").at(-2);
        const candidate = inventory.assets.find((asset) => asset.id === id);
        const template = candidate?.specification.templateName;

        return route.fulfill({
          json: {
            operational: candidate?.values.status === "operational",
            computer: ["Portátil", "PC de sobremesa"].includes(template),
            server: template === "Servidor",
          },
        });
      }
      if (!url.pathname.endsWith("/relationships")) {
        return route.fallback();
      }
      const fromAsset = p.get("anchorType") === "assets:asset";
      const anchor = p.get("anchorId");
      const pg = slice(
        memberships.filter((m) => (fromAsset ? m.source.id : m.target.id) === anchor),
        p.get("cursor"),
        Number(p.get("pageSize"))
      );
      const response = { page: pg, summaries: summaries(pg.items, fromAsset) };

      page.embeddedData.directoryResponse = response;

      return route.fulfill({ json: response });
    }
  );

  return {
    shares: shares.length,
    publications: publications.length,
    memberships: memberships.length,
  };
}