import { runOverlaySmoke } from "./browser_overlays.js";
import { runRaceSetupSmoke } from "./browser_race_setup.js";
import { runRaceDaySmoke } from "./browser_race_day.js";
import { runRaceDayStartSequencesSmoke } from "./browser_race_day_start_sequences.js";
import { runTeamMembershipSmoke } from "./browser_team_membership.js";
import { runEventManagerTabsSmoke } from "./browser_event_manager_tabs.js";
import { runEventScheduleSmoke } from "./browser_event_schedule.js";
import { runSettingsTabsSmoke } from "./browser_settings_tabs.js";
import { runGuideTabsSmoke } from "./browser_guide_tabs.js";
import { runAuthSmoke } from "./browser_auth.js";
import { runObsPopupSmoke } from "./browser_obs_popup.js";
import { runDecoderReconnectSmoke } from "./browser_decoder_reconnect.js";
import assert from "node:assert/strict";
import { spawn } from "node:child_process";
import { existsSync, mkdtempSync, rmSync } from "node:fs";
import { createServer } from "node:net";
import { tmpdir } from "node:os";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const project = dirname(dirname(fileURLToPath(import.meta.url)));
const chrome = [process.env.CHROME_PATH, "/usr/bin/google-chrome", "/usr/bin/chromium", "/usr/bin/chromium-browser", "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome", ...[process.env.PROGRAMFILES, process.env["PROGRAMFILES(X86)"], process.env.LOCALAPPDATA].filter(Boolean).flatMap(base => [join(base, "Google", "Chrome", "Application", "chrome.exe"), join(base, "Microsoft", "Edge", "Application", "msedge.exe")])].find(path => path && existsSync(path));
if (!chrome) throw new Error("Chrome/Chromium/Edge not found. Set CHROME_PATH to the browser executable.");
const temporary = mkdtempSync(join(tmpdir(), "racecore-browser-"));
const children = [];
let socket;
const pause = ms => new Promise(resolve => setTimeout(resolve, ms));
async function waitFor(check, label, timeout = 15000) {
  const until = Date.now() + timeout;
  while (Date.now() < until) {
    try { if (await check()) return; } catch {}
    await pause(100);
  }
  throw new Error("Timed out: " + label);
}
async function freePort() {
  const server = createServer();
  await new Promise((resolve, reject) => { server.once("error", reject); server.listen(0, "127.0.0.1", resolve); });
  const port = server.address().port;
  await new Promise(resolve => server.close(resolve));
  return port;
}
function launch(command, args, options = {}) {
  const child = spawn(command, args, { cwd: project, stdio: "ignore", ...options });
  children.push(child);
  child.on("error", error => { console.error(error.message); });
  return child;
}
try {
  const port = await freePort();
  const debugPort = await freePort();
  const base = `http://127.0.0.1:${port}`;
  launch(process.execPath, ["server.js"], { env: { ...process.env, HOST: "127.0.0.1", PORT: String(port), RC_TIMING_DATA_DIR: join(temporary, "data"), RC_TIMING_PID_FILE: "" } });
  await waitFor(async () => (await fetch(base + "/api/health")).ok, "isolated server");
  const initial = { classes: [{ id: "test_class", name: "Test Class" }], drivers: [], cars: [], events: [], sessions: [], resultsBySession: {}, settings: { language: "en", autoReconnect: false, backendUrl: base, raceAudio: { enabled: false } }, training: {} };
  const seedResponse = await fetch(base + "/api/state", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(initial) });
  assert.equal(seedResponse.ok, true);
  launch(chrome, ["--headless", "--disable-gpu", "--no-first-run", "--no-default-browser-check", "--disable-background-networking", ...(process.env.RC_BROWSER_NO_SANDBOX === "1" ? ["--no-sandbox"] : []), `--user-data-dir=${join(temporary, "browser")}`, `--remote-debugging-port=${debugPort}`, "about:blank"]);
  let target;
  await waitFor(async () => { target = (await (await fetch(`http://127.0.0.1:${debugPort}/json/list`)).json()).find(page => page.type === "page"); return target; }, "headless browser");
  socket = new WebSocket(target.webSocketDebuggerUrl);
  await new Promise((resolve, reject) => { socket.addEventListener("open", resolve, { once: true }); socket.addEventListener("error", reject, { once: true }); });
  let nextId = 0;
  const requests = new Map();
  const errors = [];
  const dialogs = [];
  socket.addEventListener("message", event => {
    const message = JSON.parse(event.data);
    if (message.id) {
      const request = requests.get(message.id);
      requests.delete(message.id);
      if (message.error) request?.reject(new Error(message.error.message)); else request?.resolve(message.result);
    } else if (message.method === "Runtime.exceptionThrown") errors.push(message.params.exceptionDetails.text + ": " + (message.params.exceptionDetails.exception?.description || ""));
    // A native confirm()/alert() blocks the page's JS thread until dismissed. Nothing in a
    // headless run can click it, so every scenario would hang forever on the first one;
    // auto-accept and record it so an unexpected dialog still surfaces as a finding.
    else if (message.method === "Page.javascriptDialogOpening") {
      dialogs.push({ type: message.params.type, message: message.params.message });
      send("Page.handleJavaScriptDialog", { accept: true });
    }
  });
  function send(method, params = {}) {
    return new Promise((resolve, reject) => { const id = ++nextId; requests.set(id, { resolve, reject }); socket.send(JSON.stringify({ id, method, params })); });
  }
  async function evaluate(expression) {
    const result = await send("Runtime.evaluate", { expression, returnByValue: true, awaitPromise: true });
    if (result.exceptionDetails) throw new Error(result.exceptionDetails.exception?.description || result.exceptionDetails.text);
    return result.result.value;
  }
  // A synthetic element.click() from Runtime.evaluate does not count as a trusted user
  // gesture, so Chrome's popup blocker silently drops any window.open() it triggers.
  // Dispatching real input events is required for scenarios that open a popup window.
  async function realClick(selector) {
    // scrollIntoView first: Input.dispatchMouseEvent uses viewport coordinates, so a
    // button below the fold (the default headless window is short) would otherwise get
    // "clicked" at a point outside the visible page and silently hit nothing.
    const box = await evaluate(`(() => { const el = document.querySelector(${JSON.stringify(selector)}); if (!el) return null; el.scrollIntoView({ block: "center" }); const r = el.getBoundingClientRect(); return JSON.stringify({ x: r.x + r.width / 2, y: r.y + r.height / 2, w: r.width, h: r.height }); })()`);
    if (!box) throw new Error("realClick: element not found for " + selector);
    const { x, y, w, h } = JSON.parse(box);
    if (!w || !h) throw new Error("realClick: element has zero size for " + selector);
    await send("Input.dispatchMouseEvent", { type: "mousePressed", x, y, button: "left", clickCount: 1 });
    await send("Input.dispatchMouseEvent", { type: "mouseReleased", x, y, button: "left", clickCount: 1 });
  }
  await send("Runtime.enable");
  await send("Page.enable");
  await send("Network.enable");
  await send("Network.setBlockedURLs", { urls: ["*fonts.googleapis.com*", "*fonts.gstatic.com*"] });
  const status = () => evaluate('document.getElementById("syncStatus")?.dataset.state');
  async function navigate(view, form) {
    await send("Page.navigate", { url: base + "/?view=" + view });
    try {
      await waitFor(async () => await evaluate(`Boolean(document.getElementById(${JSON.stringify(form)})) && document.getElementById("syncStatusDetail")?.textContent.includes("Data loaded")`), view + " hydrated");
    } catch (error) {
      throw new Error(error.message + "\n" + JSON.stringify({ errors, page: await evaluate("document.body.innerText.slice(0, 1800)") }));
    }
  }
  async function fill(form, fields) {
    await evaluate(`(() => { const form = document.getElementById(${JSON.stringify(form)}); for (const [name,value] of Object.entries(${JSON.stringify(fields)})) { const field=form.elements.namedItem(name); if (!field) throw new Error("Missing field "+name); field.value=value; field.dispatchEvent(new Event("input", {bubbles:true})); } })()`);
  }
  const savedState = async () => (await (await fetch(base + "/api/state")).json()).state;
  for (const [view, prefix, collection, fields] of [
    ["classes", "class", "classes", { name: "Browser Class" }],
    ["drivers", "driver", "drivers", { name: "Browser Driver", classId: "test_class", transponder: "123456", club: "Test Club" }],
    ["cars", "car", "cars", { name: "Browser Car", transponder: "654321", brand: "Test Brand" }],
  ]) {
    await navigate(view, prefix + "Form");
    await fill(prefix + "Form", fields);
    await evaluate(`document.getElementById("${prefix}Form").requestSubmit()`);
    await waitFor(async () => (await savedState())[collection]?.some(item => item.name === fields.name), "create " + prefix);
    const item = (await savedState())[collection].find(item => item.name === fields.name);
    await evaluate(`document.getElementById(${JSON.stringify(prefix + "-edit-" + item.id)}).click()`);
    await fill(prefix + "EditForm", { name: fields.name + " Updated" });
    // Two version polls must not replace the active editor or its draft.
    await pause(10500);
    assert.equal(await evaluate(`document.getElementById("${prefix}EditForm").elements.namedItem("name").value`), fields.name + " Updated");
    await evaluate(`document.getElementById("${prefix}EditSave").click()`);
    await waitFor(async () => (await savedState())[collection]?.some(row => row.id === item.id && row.name === fields.name + " Updated"), "edit " + prefix);
    await navigate(view, prefix + "Form");
    assert.ok(await evaluate(`document.getElementById("view").textContent.includes(${JSON.stringify(fields.name + " Updated")})`));
    console.log("PASS create/edit/reload and draft retention: " + collection);
  }
  await runRaceSetupSmoke({ evaluate, navigate, fill, savedState, waitFor, pause });
  await runTeamMembershipSmoke({ evaluate, navigate, fill, savedState, waitFor, pause, base });
  await runEventManagerTabsSmoke({ evaluate, navigate, savedState, waitFor, base });
  await runEventScheduleSmoke({ evaluate, navigate, fill, savedState, waitFor, base });
  await runSettingsTabsSmoke({ evaluate, navigate });
  await runGuideTabsSmoke({ evaluate, navigate });
  await runAuthSmoke({ evaluate, navigate, fill, savedState, waitFor });
  await runRaceDaySmoke({ evaluate, navigate, fill, savedState, waitFor, pause, base, dialogs });
  await runRaceDayStartSequencesSmoke({ evaluate, navigate, waitFor, pause, base, dialogs });
  await runObsPopupSmoke({ evaluate, navigate, fill, savedState, waitFor, pause, base, debugPort, dialogs, realClick });
  await runDecoderReconnectSmoke({ evaluate, navigate, savedState, waitFor, pause, base });
  await navigate("classes", "classForm");
  await send("Network.emulateNetworkConditions", { offline: true, latency: 0, downloadThroughput: -1, uploadThroughput: -1 });
  await fill("classForm", { name: "Offline Draft" });
  await evaluate('document.getElementById("classForm").requestSubmit()');
  await waitFor(async () => (await status()) === "error", "visible save failure");
  assert.ok(!(await savedState()).classes.some(item => item.name === "Offline Draft"));
  await send("Network.emulateNetworkConditions", { offline: false, latency: 0, downloadThroughput: -1, uploadThroughput: -1 });
  await evaluate('document.getElementById("syncStatusRetry").click()');
  await waitFor(async () => (await savedState()).classes.some(item => item.name === "Offline Draft"), "retry persisted draft");
  await waitFor(async () => (await status()) === "saved", "confirmed saved status");
  await navigate("settings", "settingsForm");
  await evaluate(`(async () => {
    const panel = document.getElementById("decoderDiagnostics");
    if (!panel) throw new Error("Missing decoder diagnostics");
    panel.open = true;
    const field = document.querySelector('#settingsForm [name="wsUrl"]');
    field.value = "ws://draft.example:9000";
    const { decoderDiagnostics } = await import("/src/decoder_diagnostics.js");
    decoderDiagnostics.frame("main", "diagnostic sample");
    await new Promise(resolve => setTimeout(resolve, 1200));
    if (!panel.textContent.includes("diagnostic sample")) throw new Error("Diagnostics did not update");
    if (field.value !== "ws://draft.example:9000") throw new Error("Diagnostics reset settings draft");
  })()`);
  console.log("PASS decoder diagnostics update without resetting settings draft");
  await runOverlaySmoke({ evaluate });
  const mobileState = await savedState();
  const mobileToken = "browser-mobile-profile-token-1234567890";
  mobileState.training ||= {};
  mobileState.training.shares = [{ driverId: mobileState.drivers[0].id, token: mobileToken, enabled: true }];
  const mobileSave = await fetch(base + "/api/state", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(mobileState) });
  assert.ok(mobileSave.ok);
  await send("Page.navigate", { url: base + "/public-training/" + mobileToken + "?lang=sv" });
  await waitFor(async () => await evaluate('document.getElementById("publicTrainingConnection")?.dataset.state === "current"'), "mobile profile loaded");
  await evaluate('window.mobileContentBeforeFailure = document.getElementById("publicTrainingRoot").firstElementChild');
  await send("Network.emulateNetworkConditions", { offline: true, latency: 0, downloadThroughput: -1, uploadThroughput: -1 });
  await waitFor(async () => await evaluate('document.getElementById("publicTrainingConnection")?.dataset.state === "failed"'), "mobile connection warning");
  assert.ok(await evaluate('window.mobileContentBeforeFailure === document.getElementById("publicTrainingRoot").firstElementChild'));
  await send("Network.emulateNetworkConditions", { offline: false, latency: 0, downloadThroughput: -1, uploadThroughput: -1 });
  await evaluate('document.getElementById("publicTrainingRetry").click()');
  await waitFor(async () => await evaluate('document.getElementById("publicTrainingConnection")?.dataset.state === "current"'), "mobile retry recovered");
  console.log("PASS mobile offline status preserves profile nodes and retry recovers");
  assert.deepEqual(errors, []);
  if (dialogs.length) console.log("NOTE auto-accepted native dialog(s):", JSON.stringify(dialogs));
  console.log("PASS offline save failure, local draft retention, retry and confirmed saved status");
} finally {
  socket?.close();
  for (const child of children.reverse()) {
    if (child.exitCode !== null || child.signalCode !== null) continue;
    const exited = new Promise(resolve => child.once("exit", resolve));
    child.kill();
    await Promise.race([exited, pause(2000)]);
    if (child.exitCode === null && child.signalCode === null) { child.kill("SIGKILL"); await Promise.race([exited, pause(1000)]); }
  }
  rmSync(temporary, { recursive: true, force: true, maxRetries: 5, retryDelay: 200 });
}