/* UI-Test Auth-Gate (jsdom) gegen einen echten Server.
 *
 * Lauf:  NODE_PATH=<...>/node_modules node tests/test_ui_auth.js
 */
const path = require("path");
const BASE = path.join(__dirname, "..");
const { JSDOM } = require("jsdom");
const { spawn } = require("child_process");
const fs = require("fs");
const http = require("http");

const STATE = "/tmp/tp_state_ui_auth";
const PORT = 8237;
const BASE_URL = `http://127.0.0.1:${PORT}`;

let pass = 0, fail = 0;
function check(name, cond, detail = "") {
  if (cond) { pass++; console.log("  ok  " + name); }
  else { fail++; console.log("FAIL  " + name + "  " + detail); }
}
const sleep = ms => new Promise(r => setTimeout(r, ms));

function api(method, p, body, token) {
  return new Promise((resolve, reject) => {
    const data = body ? JSON.stringify(body) : null;
    const req = http.request(BASE_URL + p, {
      method,
      headers: Object.assign(data ? {
        "Content-Type": "application/json",
        "Content-Length": Buffer.byteLength(data),
      } : {}, token ? { Authorization: "Bearer " + token } : {}),
    }, res => {
      let d = "";
      res.on("data", c => d += c);
      res.on("end", () => resolve({ status: res.statusCode, body: JSON.parse(d || "{}") }));
    });
    if (data) req.write(data);
    req.end();
    req.on("error", reject);
  });
}

async function loadApp(html, appJs, token) {
  const dom = new JSDOM(html, { runScripts: "dangerously", url: BASE_URL + "/" });
  const { window } = dom;
  window.errors = [];
  window.addEventListener("error", e => window.errors.push(e.message || String(e)));
  window.fetch = (url, opts) => fetch(BASE_URL + url, opts);
  if (token) window.localStorage.setItem("tp_token", token);
  window.eval(appJs);
  return window;
}

async function main() {
  fs.rmSync(STATE, { recursive: true, force: true });
  fs.mkdirSync(STATE, { recursive: true });
  const server = spawn("python3", [path.join(BASE, "server.py")], {
    env: { ...process.env, TRAINING_STATE_DIR: STATE, PORT: String(PORT) },
    cwd: BASE, stdio: "ignore",
  });
  try {
    for (let i = 0; i < 60; i++) {
      try { await api("GET", "/api/meta"); break; }
      catch (_) { await sleep(200); }
    }
    const html = fs.readFileSync(path.join(BASE, "index.html"), "utf8")
      .replace(/<script src="\/app.js"><\/script>/, "");
    const appJs = fs.readFileSync(path.join(BASE, "app.js"), "utf8");

    // --- Szenario 0: Ersteinrichtungs-Wizard (offener Modus) ---------------
    const winSetup = await loadApp(html, appJs, null);
    await sleep(1000);
    const sgate = () => winSetup.document.querySelector("#setup-gate");
    check("Setup: Gate im offenen Modus sichtbar",
      !!sgate() && !sgate().hidden);
check("Setup: Sprache kommt zuerst",
      sgate().querySelector(".wizard-title")
      && sgate().querySelector(".wizard-title").textContent === "Sprache festlegen");
    Array.from(sgate().querySelectorAll(".day-btn"))
      .find(b => b.textContent === "English").click();
    await sleep(200);
    check("Setup: Wizard wechselt auf Englisch",
      Array.from(sgate().querySelectorAll(".wizard-nav .btn"))
        .some(b => b.textContent === "Next"));
    Array.from(sgate().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Next").click();
    await sleep(200);
    check("Setup: Darstellung kommt als zweites",
      sgate().querySelector(".wizard-title").textContent === "Appearance"
      && !!sgate().querySelector(".accent-row")
      && !!sgate().querySelector(".toggle-row"));
    Array.from(sgate().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Next").click();
    await sleep(200);
    const setupOptions = () => Array.from(sgate().querySelectorAll(".setup-option"));
    check("Setup: zwei gleichwertige Optionen",
      setupOptions().some(b => b.textContent.includes("Multi-user mode"))
      && setupOptions().some(b => b.textContent.includes("Single-user mode")));
    check("Setup: Mehrbenutzer-Infotext",
      setupOptions().some(b => b.textContent.includes("administrator")
        && b.textContent.toLowerCase().includes("single user")));
    setupOptions().find(b => b.textContent.includes("Multi-user mode")).click();
    await sleep(150);
    check("Setup: Formular nach Mehrbenutzermodus-Klick",
      !!sgate().querySelector("input#setup-user")
      && !!sgate().querySelector("input#setup-pass"));
    // User wird erst beim Abschliessen erstellt (nicht beim Tippen)
    sgate().querySelector("#setup-user").value = "alex";
    sgate().querySelector("#setup-pass").value = "geheim";
    sgate().querySelector("#setup-user")
      .dispatchEvent(new winSetup.window.Event("input", { bubbles: true }));
    sgate().querySelector("#setup-pass")
      .dispatchEvent(new winSetup.window.Event("input", { bubbles: true }));
    await sleep(150);
    check("Setup: User wird erst beim Abschliessen erstellt",
      (await api("GET", "/api/meta")).body.users === 0);
    // Einzelmodus waehlen -> abschliessen (User wird NICHT erstellt)
    setupOptions().find(b => b.textContent.includes("Single-user mode")).click();
    Array.from(sgate().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Finish setup").click();
    await sleep(400);
    check("Setup: Gate zu + setupDone + Sprache persistiert",
      sgate().hidden
      && (await api("GET", "/api/settings")).body.setupDone === true
      && (await api("GET", "/api/settings")).body.language === "en");

    const reg = await api("POST", "/api/register", { username: "alex", password: "geheim" });
    check("API: Register", reg.status === 200 && !!reg.body.token, reg.body);
    // Admin ist automatisch eingestellt (kein Onboarding), Sprache fuer Tests auf Deutsch
    await api("PUT", "/api/settings", { language: "de" }, reg.body.token);

    // --- Szenario 1: ohne Token -> Auth-Gate, Inline-Fehler, Login in-place ---
    const winNoToken = await loadApp(html, appJs, null);
    await sleep(1200);
    const gate = () => winNoToken.document.querySelector("#auth-gate");
    check("ohne Token: Auth-Gate sichtbar",
      gate() && !gate().hidden && winNoToken.document.body.classList.contains("no-auth"));
    check("ohne Token: Login-Formular + Felder",
      !!gate().querySelector('input#auth-user')
      && !!gate().querySelector('input#auth-pass')
      && !!gate().querySelector(".btn-primary"));
    check("ohne Token: Login-Screen in Server-Sprache",
      Array.from(gate().querySelectorAll(".btn"))
        .some(b => b.textContent === "Anmelden")
      && gate().querySelector(".auth-sub").textContent.includes("Anmelden, um deine Trainingsdaten zu sehen"));
    // falsches Kennwort -> Inline-Fehler
    gate().querySelector('input#auth-user').value = "alex";
    gate().querySelector('input#auth-pass').value = "falsch";
    Array.from(gate().querySelectorAll(".btn")).find(b => b.textContent === "Anmelden").click();
    await sleep(500);
    const authErr = gate().querySelector(".auth-error");
    check("ohne Token: Inline-Fehler bei falschem Kennwort",
      authErr && !authErr.hidden
      && authErr.textContent.includes("Kennwort inkorrekt"),
      authErr && authErr.textContent);
    // korrektes Kennwort -> Login wechselt OHNE Reload in-place
    gate().querySelector('input#auth-pass').value = "geheim";
    Array.from(gate().querySelectorAll(".btn")).find(b => b.textContent === "Anmelden").click();
    let loggedIn = false;
    for (let i = 0; i < 60; i++) {
      const og = winNoToken.document.querySelector("#setup-gate");
      if (og && !og.hidden && winNoToken.document.body.classList.contains("no-auth")) {
        loggedIn = true; // Onboarding-Gate erscheint -> Anmeldung war erfolgreich
        break;
      }
      if (winNoToken.document.querySelectorAll(".act-card").length === 3
          && winNoToken.document.querySelector("#logout-btn") === null) {
        loggedIn = true;
        break;
      }
      await sleep(100);
    }
    check("Login: wechselt ohne Reload in den eingeloggten Zustand", loggedIn);
    check("Login: Admin ohne Onboarding direkt in Heute-Ansicht",
      winNoToken.document.querySelector("#setup-gate").hidden
      && winNoToken.document.querySelectorAll(".act-card").length === 3);
    check("Login: kein Auth-Gate mehr",
      winNoToken.document.querySelector("#auth-gate").hidden);

    // --- Szenario 2: frisches Fenster mit Token -> direkt eingeloggt ------
    const winTok = await loadApp(html, appJs, reg.body.token);
    await sleep(1200);
    let tokOk = false;
    for (let i = 0; i < 50; i++) {
      if (winTok.document.querySelectorAll(".act-card").length === 3) {
        tokOk = true;
        break;
      }
      await sleep(100);
    }
    check("mit Token: Heute-Ansicht geladen (kein Onboarding mehr)", tokOk);
    check("mit Token: kein Auth-Gate", winTok.document.querySelector("#auth-gate").hidden);

    // --- Szenario 3: Einstellungen mit Konto- und Benutzer-Bereich --------
    winTok.document.querySelector('.tab[data-view="settings"]').click();
    let secTitles = [];
    for (let i = 0; i < 40; i++) {
      secTitles = Array.from(winTok.document.querySelectorAll(".data-section h3"))
        .map(h => h.textContent);
      if (secTitles.includes("Konto") && secTitles.includes("Benutzer")) break;
      await sleep(100);
    }
    check("Einstellungen: Konto-Bereich (Kennwort aendern)",
      secTitles.includes("Konto")
      && Array.from(winTok.document.querySelectorAll(".data-section"))
        .some(s => s.querySelector("h3").textContent === "Konto"
          && !!s.querySelector('input[placeholder="Aktuelles Kennwort"]')
          && !!s.querySelector('input[placeholder="Neues Kennwort"]')
          && Array.from(s.querySelectorAll(".btn"))
            .some(b => b.textContent === "Abmelden")));
    check("Einstellungen: nur ein Benutzer -> Hinweis statt Liste", await (async () => {
      for (let i = 0; i < 40; i++) {
        if (Array.from(winTok.document.querySelectorAll(".user-row"))
          .some(r => r.textContent.includes("einzige"))) return true;
        await sleep(100);
      }
      return false;
    })());
    // Zweiten Benutzer anlegen -> Liste zeigt ihn, Admin bleibt draussen
    const createdB = await api("POST", "/api/users",
      { username: "berta", password: "geheim" }, reg.body.token);
    check("API: Owner legt Berta an", createdB.status === 200, createdB.body);
    winTok.document.querySelector('.tab[data-view="today"]').click();
    winTok.document.querySelector('.tab[data-view="settings"]').click();
    await sleep(400);
    const rows = () => Array.from(winTok.document.querySelectorAll(".user-row"));
    check("Einstellungen: Berta in Liste, Admin nicht aufgelistet",
      rows().length === 1 && rows()[0].textContent.includes("berta")
      && !rows().some(r => r.textContent.includes("alex")));
    check("Einstellungen: Kennwort-Knopf pro Benutzer",
      Array.from(rows()[0].querySelectorAll(".btn"))
        .some(b => b.textContent === "Kennwort ändern"));

    // Berta (normaler User) durchlaeuft einmaliges Onboarding (Sprache zuerst)
    const loginB = await api("POST", "/api/login",
      { username: "berta", password: "geheim" });
    const winB = await loadApp(html, appJs, loginB.body.token);
    await sleep(1200);
    const bg = () => winB.document.querySelector("#setup-gate");
    check("Berta: Onboarding erscheint (einmalig)",
      bg() && !bg().hidden);
    Array.from(bg().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Weiter").click();
    await sleep(150);
    Array.from(bg().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Einrichtung abschließen").click();
    await sleep(400);
    check("Berta: nach Onboarding Heute-Ansicht",
      bg().hidden && winB.document.querySelectorAll(".act-card").length === 3);

    // --- Szenario 4: API-Login-Faelle --------------------------------------
    check("API: Login mit falschem Passwort -> 401",
      (await api("POST", "/api/login", { username: "alex", password: "falsch" })).status === 401);
    check("API: Login korrekt -> Token",
      (await api("POST", "/api/login", { username: "alex", password: "geheim" })).status === 200);

    const errs = winNoToken.errors.concat(winTok.errors);
    if (errs.length) {
      console.log("JS-Fehler:", errs.slice(0, 5).join(" | "));
      fail += errs.length;
    }
  } finally {
    server.kill("SIGTERM");
  }
  console.log(`\n${pass} ok, ${fail} fail`);
  process.exit(fail ? 1 : 0);
}

main().catch(e => { console.error(e); process.exit(1); });