import assert from "node:assert/strict";
import { spawn } from "node:child_process";
import { once } from "node:events";
import { mkdtemp, rm } from "node:fs/promises";
import { createServer as createNetServer } from "node:net";
import { tmpdir } from "node:os";
import { dirname, join, resolve } from "node:path";
import test from "node:test";
import { fileURLToPath } from "node:url";

const foundryRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");

test("Design Profile owns design-only page fragments while Page Library stays read-only", async () => {
  const runtimeDir = await mkdtemp(join(tmpdir(), "nodedc-foundry-design-profile-"));
  const port = await freePort();
  const foundry = spawn(process.execPath, ["server/catalog-server.mjs"], {
    cwd: foundryRoot,
    env: {
      ...process.env,
      NODE_ENV: "development",
      HOST: "127.0.0.1",
      PORT: String(port),
      FOUNDRY_RUNTIME_DIR: runtimeDir,
      NODEDC_FOUNDRY_AUTH_REQUIRED: "false",
    },
    stdio: ["ignore", "pipe", "pipe"],
  });

  try {
    await waitForService(port, foundry);
    const base = `http://127.0.0.1:${port}`;
    const profileResponse = await fetch(`${base}/api/design-profiles/default`);
    assert.equal(profileResponse.status, 200);
    const profile = await profileResponse.json();
    const fragment = profile.layout.pageTypes["map@0.1.0"];
    assert.equal(fragment.templateId, "map");
    assert.equal(fragment.templateVersion, "0.1.0");
    assert.equal("camera" in fragment, false);
    assert.equal("pinBindings" in fragment, false);
    assert.equal("dataProductBindings" in fragment, false);

    const pageLibraryMutation = await fetch(`${base}/api/page-layouts/map`, {
      method: "PUT",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({}),
    });
    assert.equal(pageLibraryMutation.status, 405);
    assert.equal((await pageLibraryMutation.json()).error, "page_library_read_only");

    const forbiddenFragment = await fetch(`${base}/api/design-profiles/default`, {
      method: "PUT",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({
        name: profile.name,
        layout: {
          ...profile.layout,
          pageTypes: {
            ...profile.layout.pageTypes,
            "map@0.1.0": { ...fragment, camera: { longitude: 0, latitude: 0 } },
          },
        },
      }),
    });
    assert.equal(forbiddenFragment.status, 400);
    assert.equal((await forbiddenFragment.json()).error, "design_profile_page_fragment_contains_runtime");

    const savedProfileResponse = await fetch(`${base}/api/design-profiles/default`, {
      method: "PUT",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({
        name: profile.name,
        layout: {
          ...profile.layout,
          pageTypes: {
            ...profile.layout.pageTypes,
            "map@0.1.0": {
              ...fragment,
              settings: { ...fragment.settings, buildingsOpacity: 0.74 },
            },
          },
        },
      }),
    });
    assert.equal(savedProfileResponse.status, 200);
    const savedProfile = await savedProfileResponse.json();
    assert.equal(savedProfile.version, "0.6.1");
    assert.equal(savedProfile.layout.pageTypes["map@0.1.0"].settings.buildingsOpacity, 0.74);

    const applicationResponse = await fetch(`${base}/api/applications`, {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ name: "Profile merge test", slug: "profile-merge-test", templateId: "map", templateVersion: "0.1.0" }),
    });
    assert.equal(applicationResponse.status, 201);
    const application = await applicationResponse.json();
    application.pages[0].designOverrides = { map: { settings: { buildingsOpacity: 0.5 } } };
    const applicationSaveResponse = await fetch(`${base}/api/applications/${application.id}`, {
      method: "PUT",
      headers: { "content-type": "application/json" },
      body: JSON.stringify(application),
    });
    assert.equal(applicationSaveResponse.status, 200);
    const savedApplication = await applicationSaveResponse.json();
    assert.deepEqual(savedApplication.pages[0].designOverrides, { map: { settings: { buildingsOpacity: 0.5 } } });
  } finally {
    foundry.kill("SIGTERM");
    await Promise.race([once(foundry, "exit"), new Promise((resolveWait) => setTimeout(resolveWait, 2_000))]);
    if (foundry.exitCode === null) foundry.kill("SIGKILL");
    await rm(runtimeDir, { recursive: true, force: true });
  }
});

async function freePort() {
  const server = createNetServer();
  server.listen(0, "127.0.0.1");
  await once(server, "listening");
  const address = server.address();
  assert(address && typeof address === "object");
  const port = address.port;
  server.close();
  await once(server, "close");
  return port;
}

async function waitForService(port, child) {
  let output = "";
  child.stderr.on("data", (chunk) => { output += String(chunk); });
  for (let attempt = 0; attempt < 100; attempt += 1) {
    if (child.exitCode !== null) throw new Error(`foundry_exited:${child.exitCode}:${output}`);
    try {
      const response = await fetch(`http://127.0.0.1:${port}/healthz`);
      if (response.ok) return;
    } catch { /* service is still starting */ }
    await new Promise((resolveWait) => setTimeout(resolveWait, 50));
  }
  throw new Error(`foundry_start_timeout:${output}`);
}