/* UI-Integrationstest (jsdom) gegen einen echten Server-Subprozess.
 *
 * Lauf:  node tests/test_ui.js        (jsdom muss installierbar sein, z.B.
 *       NODE_PATH=/pfad/zu/node_modules node tests/test_ui.js)
 *
 * Der Test laeuft im offenen Modus (frische DB ohne Benutzer).
 */
const path = require("path");
const BASE = path.join(__dirname, "..");

let jsdom;
try {
  jsdom = require("jsdom");
} catch (_) {
  console.error("jsdom fehlt. Installieren: npm install jsdom@22.1.0 (z.B. in /tmp/tp_test) und mit NODE_PATH=<dort>/node_modules starten.");
  process.exit(2);
}
const { JSDOM } = jsdom;

const { spawn } = require("child_process");
const fs = require("fs");
const http = require("http");

const STATE = "/tmp/tp_state_ui";
const PORT = 8233;
const BASE_URL = `http://127.0.0.1:${PORT}`;

let pass = 0, fail = 0;
let jsErrors = [];
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));

async function waitFor(dom, fn, timeout = 4000) {
  const t0 = Date.now();
  while (Date.now() - t0 < timeout) {
    if (fn(dom)) return true;
    await sleep(80);
  }
  return false;
}

function apiGet(p) {
  return new Promise((resolve, reject) => {
    http.get(BASE_URL + p, res => {
      let d = "";
      res.on("data", c => d += c);
      res.on("end", () => resolve(JSON.parse(d)));
    }).on("error", reject);
  });
}

function cleanState() {
  fs.rmSync(STATE, { recursive: true, force: true });
  fs.mkdirSync(STATE, { recursive: true });
}

async function main() {
  cleanState();
  const server = spawn("python3", [path.join(BASE, "server.py")], {
    env: { ...process.env, TRAINING_STATE_DIR: STATE, PORT: String(PORT) },
    cwd: BASE, stdio: "ignore",
  });
  let window;
  try {
    for (let i = 0; i < 60; i++) {
      try { await apiGet("/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");

    const dom = new JSDOM(html, { runScripts: "dangerously", url: BASE_URL + "/" });
    window = dom.window;
    window.errors = [];
    jsErrors = window.errors;
    window.addEventListener("error", e => window.errors.push(e.message || String(e)));
    window.fetch = (url, opts) => fetch(BASE_URL + url, opts);
    window.eval(appJs);

    check("init: 3 Aktivitaets-Karten", await waitFor(dom, d =>
      d.window.document.querySelectorAll(".act-card").length === 3));

    // --- Ersteinrichtungs-Wizard abschliessen (Einzelmodus) ----------------
    const gate = () => window.document.querySelector("#setup-gate");
    await waitFor(dom, d => !d.window.document.querySelector("#setup-gate").hidden);
    check("Setup: Sprache kommt zuerst", await waitFor(dom, d =>
      gate().querySelector(".wizard-title")
      && gate().querySelector(".wizard-title").textContent === "Sprache festlegen"));
    check("Setup: Fortschrittsleiste oben",
      gate().querySelectorAll(".wp-step").length === 3
      && gate().querySelectorAll(".wp-step.is-current").length === 1
      && gate().querySelectorAll(".wp-step.is-done").length === 0);
    Array.from(gate().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Weiter").click();
    await waitFor(dom, d => gate().querySelector(".accent-row"));
    check("Setup: Fortschritt aktualisiert",
      gate().querySelectorAll(".wp-step.is-done").length === 1
      && gate().querySelectorAll(".wp-step.is-current").length === 1);
    Array.from(gate().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Weiter").click();
    await waitFor(dom, d => gate().querySelectorAll(".setup-option").length === 2);
    const setupOptions = () => Array.from(gate().querySelectorAll(".setup-option"));
    check("Setup: zwei gleichwertige Optionen",
      setupOptions().some(b => b.textContent.includes("Mehrbenutzermodus"))
      && setupOptions().some(b => b.textContent.includes("Einzelmodus")));
    setupOptions().find(b => b.textContent.includes("Einzelmodus")).click();
    Array.from(gate().querySelectorAll(".wizard-nav .btn"))
      .find(b => b.textContent === "Einrichtung abschließen").click();
    check("Setup: Gate geschlossen nach Wizard", await waitFor(dom, d =>
      d.window.document.querySelector("#setup-gate").hidden));

    const gymCard = () => window.document.querySelectorAll(".act-card")[0];
    gymCard().querySelector(".btn-primary").click();
    check("gym: Session gestartet", await waitFor(dom, d =>
      d.window.document.querySelectorAll(".act-card")[0].querySelectorAll(".set-row").length > 0));

    const firstBlock = () => gymCard().querySelector(".ex-block");
    const chk1 = () => firstBlock().querySelectorAll(".set-check")[0];
    check("Set-Button mit Label 'Set' + Box",
      chk1().querySelector(".set-check-label").textContent === "Set"
      && !!chk1().querySelector(".set-check-box"));
    check("Set-Button: Box leer (nicht abgehakt)", chk1().querySelector(".set-check-box").textContent === "");
    firstBlock().querySelectorAll(".set-check")[2].click();
    check("Set-Kette: 1..3 aktiv mit Haken", await waitFor(dom, d => {
      const c = d.window.document.querySelectorAll(".act-card")[0].querySelectorAll(".set-check");
      return c[0].classList.contains("is-done") && c[2].classList.contains("is-done")
        && !c[3].classList.contains("is-done")
        && c[0].querySelector(".set-check-box").textContent === "✓";
    }));
    const wIn = () => firstBlock().querySelectorAll(".set-row")[0].querySelector(".field-input");
    wIn().value = "18,5";
    wIn().dispatchEvent(new window.Event("input", { bubbles: true }));
    const wBefore = wIn().value;
    chk1().click();
    check("Set-Klick veraendert Gewicht nicht", wIn().value === wBefore);
    firstBlock().querySelectorAll(".set-check")[2].click();

    const picker = () => gymCard().querySelector(".ex-picker");
    const pullEx = "Pull/Latzug / Klimmzug-Maschine";
    picker().value = pullEx;
    picker().dispatchEvent(new window.Event("change", { bubbles: true }));
    check("Uebung aus anderem Tag hinzugefuegt", await waitFor(dom, d => {
      const blocks = d.window.document.querySelectorAll(".act-card")[0].querySelectorAll(".ex-block");
      const last = blocks[blocks.length - 1];
      return last.querySelector(".ex-name").textContent === "Latzug / Klimmzug-Maschine";
    }));
    const blocks = () => gymCard().querySelectorAll(".ex-block");
    const addedBlock = blocks()[blocks().length - 1];
    const rmBtn = addedBlock.querySelector(".ex-remove");
    check("Entfernen-Knopf fuer hinzugefuegte Uebung", !!rmBtn);
    rmBtn.click();
    check("Uebung entfernt", await waitFor(dom, d =>
      !Array.from(d.window.document.querySelectorAll(".act-card")[0].querySelectorAll(".ex-block"))
        .some(b => b.querySelector(".ex-name").textContent === "Latzug / Klimmzug-Maschine")));

    gymCard().querySelector(".session-head .btn-primary").click();
    check("abschliessen: Karte zurueck auf Start", await waitFor(dom, d => {
      const c = d.window.document.querySelectorAll(".act-card")[0];
      return !!c.querySelector(".start-box");
    }));
    let done = await apiGet("/api/sessions?status=done");
    check("Verlauf (API): 1 abgeschlossene Session", done.length === 1);

    window.document.querySelector('.tab[data-view="history"]').click();
    await waitFor(dom, d => d.window.document.querySelectorAll(".hist-card").length === 1);
    const histCard = () => window.document.querySelector(".hist-card");
    check("Verlauf: Haken-Box zeigt Abhak-Status",
      !!histCard().querySelector(".set-done-box")
      && histCard().querySelector(".set-done-box").textContent === "✓");
    check("Verlauf: Abgehaktes Set mit Gewicht", await waitFor(dom, d =>
      d.window.document.querySelector(".hist-sets").textContent.includes("18,5")));

    window.document.querySelector('.tab[data-view="settings"]').click();
    await waitFor(dom, d => !!d.window.document.querySelector(".accent-row"));
    check("Einstellungen: Theme-Buttons",
      Array.from(window.document.querySelectorAll("#view-settings .day-picker .day-btn"))
        .filter(b => ["Dunkel", "System", "Hell"].includes(b.textContent)).length === 3);
    check("Einstellungen: Akzent-Swatches", window.document.querySelectorAll(".accent-swatch").length >= 5);
    check("Einstellungen: Toggles + Selects",
      window.document.querySelectorAll("#view-settings .toggle-input").length === 4
      && window.document.querySelectorAll("#view-settings .settings-select-row").length === 2);

    const themeBtns = () => Array.from(window.document.querySelectorAll("#view-settings .day-picker .day-btn"));
    // OLED-Toggle bei dunklem Theme -> reines Schwarz
    Array.from(window.document.querySelectorAll("#view-settings .toggle-row"))
      .find(r => r.querySelector("strong").textContent === "OLED-Dark")
      .querySelector(".toggle-input").click();
    await waitFor(dom, d => d.window.document.documentElement.dataset.theme === "oled");
    check("OLED-Toggle: dunkles Theme wird pure black",
      window.document.documentElement.dataset.theme === "oled");
    themeBtns().find(b => b.textContent === "Hell").click();
    await waitFor(dom, d => d.window.document.documentElement.dataset.theme === "light");
    check("Theme 'Hell' gesetzt", window.document.documentElement.dataset.theme === "light");

    const swatches = () => Array.from(window.document.querySelectorAll(".accent-swatch"));
    swatches().find(s => s.getAttribute("aria-label") === "Akzent green").click();
    await waitFor(dom, d => d.window.document.documentElement.dataset.accent === "green");
    check("Akzent 'green' gesetzt", window.document.documentElement.dataset.accent === "green");

    const toggles = () => Array.from(window.document.querySelectorAll(".toggle-row"));
    const tipRow = toggles().find(r => r.querySelector("strong").textContent === "Übungs-Hinweise");
    tipRow.querySelector(".toggle-input").click();
    await waitFor(dom, d => d.window.document.querySelector("#view-today").classList.contains("no-tips"));
    check("showTips aus: no-tips Klasse", window.document.querySelector("#view-today").classList.contains("no-tips"));

    const resetRow = toggles().find(r => r.querySelector("strong").textContent === "Letztes Training vorbefüllen");
    resetRow.querySelector(".toggle-input").click();
    // Auf Server-Zustand warten (DOM-Check war falsch: [0] ist der OLED-Toggle)
    let arOk = false;
    for (let i = 0; i < 80; i++) {
      if ((await apiGet("/api/settings")).autoReset === true) { arOk = true; break; }
      await sleep(100);
    }
    check("Einstellung 'Letztes Training' serverseitig aktiv", arOk);

    window.document.querySelector('.tab[data-view="today"]').click();
    gymCard().querySelector(".btn-primary").click();
    // Auto-Reset serverseitig pruefen (deterministisch statt DOM-Timing)
    let autoOk = false;
    for (let i = 0; i < 120; i++) {
      const act = await apiGet("/api/sessions?status=active");
      if (act.length && act[0].entries.length === 1
          && act[0].entries[0].weight === "18,5") { autoOk = true; break; }
      await sleep(100);
    }
    check("Auto-Reset: 1 gefuellter Satz geladen", autoOk);
    await waitFor(dom, d => d.window.document.querySelectorAll(".act-card")[0]
      .querySelectorAll(".set-row").length > 0, 9000);
    check("Auto-Reset: Satz nicht abgehakt",
      gymCard().querySelector(".ex-block .set-check").querySelector(".set-check-box").textContent === "");
    check("Auto-Reset: 'Alles zuruecksetzen'-Knopf da",
      !!gymCard().querySelector(".session-head .btn[title*='letzte']"));
    check("Hinweiszeile ausgeblendet",
      !gymCard().querySelector(".ex-block .ex-hint"));

    // --- Uebungen per Drag & Drop sortieren --------------------------------
    gymCard().querySelectorAll(".ex-block")[0]
      .dispatchEvent(new window.Event("dragstart", { bubbles: true }));
    const target = gymCard().querySelectorAll(".ex-block")[1];
    target.dispatchEvent(new window.Event("drop", { bubbles: true }));
    check("Uebungen: Drag & Drop sortiert",
      Array.from(gymCard().querySelectorAll(".ex-block"))[0]
        .querySelector(".ex-name").textContent !== "Bankdrücken KH (je Hand)");

    // --- Wochen-Uebersicht ---------------------------------------------------
    window.document.querySelector('.tab[data-view="history"]').click();
    await waitFor(dom, d => d.window.document.querySelectorAll(".hist-card").length >= 1);
    Array.from(window.document.querySelectorAll(".day-picker .day-btn"))
      .find(b => b.textContent === "Woche").click();
    check("Wochen-Uebersicht: Raster mit 7 Tagen",
      await waitFor(dom, d => d.window.document.querySelectorAll(".week-day").length === 7));

  } finally {
    server.kill("SIGTERM");
  }
  if (jsErrors && jsErrors.length) {
    console.log("JS-Fehler im Browser:", jsErrors.slice(0, 5).join(" | "));
    fail += jsErrors.length;
  }
  console.log(`\n${pass} ok, ${fail} fail`);
  process.exit(fail ? 1 : 0);
}

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