import test from "node:test";
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 } from "node:net";
import { get as httpGet } from "node:http";
import { tmpdir } from "node:os";
import path from "node:path";
import { fileURLToPath } from "node:url";

const projectDir = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const serverEntry = path.join(projectDir, "dist", "server.cjs");

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

function waitForServer(child) {
  return new Promise((resolve, reject) => {
    const timeout = setTimeout(() => reject(new Error("Testserver startete nicht rechtzeitig.")), 10_000);
    const onData = (chunk) => {
      if (chunk.toString().includes("Server running")) {
        clearTimeout(timeout);
        child.stdout.off("data", onData);
        resolve();
      }
    };
    child.stdout.on("data", onData);
    child.once("exit", (code) => {
      clearTimeout(timeout);
      reject(new Error(`Testserver endete vorzeitig mit Code ${code}.`));
    });
  });
}

async function stopServer(child) {
  if (child.exitCode !== null) return;
  child.kill("SIGTERM");
  await once(child, "close");
}

function getWithHost(baseUrl, host) {
  return new Promise((resolve, reject) => {
    const request = httpGet(baseUrl, { headers: { host } }, (response) => {
      let body = "";
      response.setEncoding("utf8");
      response.on("data", (chunk) => { body += chunk; });
      response.on("end", () => resolve({ status: response.statusCode, body }));
    });
    request.on("error", reject);
  });
}

test("production hardening and public routing", async (t) => {
  await t.test("production refuses to start without secrets", async () => {
    const dataDir = await mkdtemp(path.join(tmpdir(), "author-missing-secrets-"));
    const env = { ...process.env, NODE_ENV: "production", DATA_DIR: dataDir };
    delete env.ADMIN_PASSWORD;
    delete env.SESSION_SECRET;
    const child = spawn(process.execPath, [serverEntry], { cwd: projectDir, env, stdio: ["ignore", "pipe", "pipe"] });
    let stderr = "";
    child.stderr.on("data", (chunk) => { stderr += chunk; });
    const [code] = await once(child, "close");
    assert.equal(code, 1);
    assert.match(stderr, /ADMIN_PASSWORD, SESSION_SECRET/);
    await rm(dataDir, { recursive: true, force: true });
  });

  await t.test("sessions, rate limits, domains and uploads work securely", async () => {
    const dataDir = await mkdtemp(path.join(tmpdir(), "author-server-test-"));
    const port = await freePort();
    const baseUrl = `http://127.0.0.1:${port}`;
    const child = spawn(process.execPath, [serverEntry], {
      cwd: projectDir,
      env: {
        ...process.env,
        NODE_ENV: "production",
        PORT: String(port),
        DATA_DIR: dataDir,
        ADMIN_PASSWORD: "test-password-12345",
        SESSION_SECRET: "test-session-secret-12345678901234567890",
      },
      stdio: ["ignore", "pipe", "pipe"],
    });

    try {
      await waitForServer(child);

      let response = await fetch(`${baseUrl}/api/admin/session`);
      assert.equal(response.status, 401);

      response = await fetch(`${baseUrl}/api/admin/login`, {
        method: "POST",
        headers: { "content-type": "application/json", origin: baseUrl },
        body: JSON.stringify({ password: "test-password-12345" }),
      });
      assert.equal(response.status, 200);
      const setCookie = response.headers.get("set-cookie") || "";
      assert.match(setCookie, /HttpOnly/i);
      assert.match(setCookie, /Secure/i);
      assert.match(setCookie, /SameSite=Strict/i);
      assert.doesNotMatch(setCookie, /test-password/);
      const cookie = setCookie.split(";")[0];

      response = await fetch(`${baseUrl}/api/admin/session`, { headers: { cookie } });
      assert.equal(response.status, 200);

      response = await fetch(`${baseUrl}/api/admin/author-data`);
      assert.equal(response.status, 401);

      response = await fetch(`${baseUrl}/api/admin/author-data`, { headers: { cookie } });
      assert.equal(response.status, 200);
      const adminData = await response.json();
      adminData.erotica.customSectionLinks = [
        { label: "Zum befreundeten Pseudonym", url: "https://example-pseudonym.test/" },
      ];
      response = await fetch(`${baseUrl}/api/admin/save-profile`, {
        method: "POST",
        headers: { "content-type": "application/json", origin: baseUrl, cookie },
        body: JSON.stringify({ profileKey: "erotica", profileData: adminData.erotica, expectedRevision: adminData.revision }),
      });
      assert.equal(response.status, 200);
      const firstSave = await response.json();

      response = await fetch(`${baseUrl}/api/admin/save-profile`, {
        method: "POST",
        headers: { "content-type": "application/json", origin: baseUrl, cookie },
        body: JSON.stringify({ profileKey: "erotica", profileData: adminData.erotica, expectedRevision: adminData.revision }),
      });
      assert.equal(response.status, 409);

      response = await fetch(`${baseUrl}/api/admin/save-profile`, {
        method: "POST",
        headers: { "content-type": "application/json", origin: baseUrl, cookie },
        body: JSON.stringify({
          profileKey: "erotica",
          profileData: { ...adminData.erotica, customSectionLinks: [{ label: "Unsicher", url: "javascript:alert(1)" }] },
          expectedRevision: firstSave.revision,
        }),
      });
      assert.equal(response.status, 400);

      const publicResponse = await getWithHost(`${baseUrl}/api/author-data?path=/clara`, "annieslone.de");
      assert.equal(publicResponse.status, 200);
      const publicData = JSON.parse(publicResponse.body);
      assert.deepEqual(Object.keys(publicData).sort(), ["legalDocuments", "profile", "theme"]);
      assert.equal(publicData.profile.name, "Annie Slone");
      assert.equal(publicData.theme, "velvet");
      assert.equal(publicData.profile.customDomain, undefined);
      assert.equal(publicData.profile.customPath, undefined);
      assert.deepEqual(publicData.profile.customSectionLinks, [
        { label: "Zum befreundeten Pseudonym", url: "https://example-pseudonym.test/" },
      ]);
      assert.equal(publicResponse.body.includes("Clara Finch"), false);
      assert.equal(publicResponse.body.includes("Renee Heart"), false);
      assert.equal(publicResponse.body.includes("Daniel Hesse"), false);

      let routedPage = await getWithHost(`${baseUrl}/`, "annieslone.de");
      assert.match(routedPage.body, /<title>Annie Slone/);
      routedPage = await getWithHost(`${baseUrl}/`, "www.annieslone.de");
      assert.match(routedPage.body, /<title>Annie Slone/);
      routedPage = await getWithHost(`${baseUrl}/`, "blog.annieslone.de");
      assert.match(routedPage.body, /<title>Daniel Hesse/);

      const validPng = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=";
      const upload = (fileName, base64Data) => fetch(`${baseUrl}/api/admin/upload-file`, {
        method: "POST",
        headers: { "content-type": "application/json", origin: baseUrl, cookie },
        body: JSON.stringify({ fileName, base64Data }),
      });

      response = await upload("cover.png", validPng);
      assert.equal(response.status, 201);
      const uploaded = await response.json();
      assert.match(uploaded.url, /^\/uploads\/[a-z0-9-]+\.png$/);
      assert.equal(uploaded.mimeType, "image/png");

      response = await upload("fake.png", "data:image/png;base64,SGVsbG8=");
      assert.equal(response.status, 415);
      response = await upload("wrong.jpg", validPng);
      assert.equal(response.status, 415);

      response = await fetch(`${baseUrl}${uploaded.url}`);
      assert.equal(response.status, 200);
      assert.equal(response.headers.get("x-content-type-options"), "nosniff");
      assert.match(response.headers.get("cache-control") || "", /immutable/);

      adminData.erotica.avatarUrl = uploaded.url;
      response = await fetch(`${baseUrl}/api/admin/save-profile`, {
        method: "POST",
        headers: { "content-type": "application/json", origin: baseUrl, cookie },
        body: JSON.stringify({ profileKey: "erotica", profileData: adminData.erotica, expectedRevision: firstSave.revision }),
      });
      assert.equal(response.status, 200);
      const referencedSave = await response.json();

      response = await fetch(`${baseUrl}/api/admin/uploads/${path.basename(uploaded.url)}`, {
        method: "DELETE",
        headers: { origin: baseUrl, cookie },
      });
      assert.equal(response.status, 409);

      adminData.erotica.avatarUrl = "";
      response = await fetch(`${baseUrl}/api/admin/save-profile`, {
        method: "POST",
        headers: { "content-type": "application/json", origin: baseUrl, cookie },
        body: JSON.stringify({ profileKey: "erotica", profileData: adminData.erotica, expectedRevision: referencedSave.revision }),
      });
      assert.equal(response.status, 200);

      response = await fetch(`${baseUrl}/api/admin/uploads/${path.basename(uploaded.url)}`, {
        method: "DELETE",
        headers: { origin: baseUrl, cookie },
      });
      assert.equal(response.status, 200);
      response = await fetch(`${baseUrl}${uploaded.url}`);
      assert.equal(response.status, 404);

      response = await fetch(`${baseUrl}/api/admin/logout`, { method: "POST", headers: { origin: baseUrl, cookie } });
      assert.equal(response.status, 200);
      response = await fetch(`${baseUrl}/api/admin/session`, { headers: { cookie } });
      assert.equal(response.status, 401);

      const attempts = [];
      for (let index = 0; index < 6; index += 1) {
        const attempt = await fetch(`${baseUrl}/api/admin/login`, {
          method: "POST",
          headers: { "content-type": "application/json", origin: baseUrl },
          body: JSON.stringify({ password: "wrong-password" }),
        });
        attempts.push(attempt.status);
      }
      assert.deepEqual(attempts, [401, 401, 401, 401, 401, 429]);

      response = await fetch(`${baseUrl}/`);
      assert.equal(response.headers.get("x-frame-options"), "DENY");
      assert.ok(response.headers.get("content-security-policy"));
    } finally {
      await stopServer(child);
      await rm(dataDir, { recursive: true, force: true });
    }
  });
});