// Headless browser walkthrough. Usage: NODE_PATH=<dir with puppeteer-core> node tests/browser_e2e.js http://127.0.0.1:8795 [screenshot_dir]
const puppeteer = require("puppeteer-core");
const BASE = process.argv[2] || "http://127.0.0.1:8795";
const SHOTS = process.argv[3] || "";
const results = [];
const check = (name, ok, d = "") => { results.push(ok); console.log((ok ? "PASS " : "FAIL ") + name + (d ? `  [${d}]` : "")); };
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

(async () => {
  const browser = await puppeteer.launch({ executablePath: process.env.CHROME || "/usr/bin/google-chrome", headless: "new",
    args: ["--no-sandbox", "--disable-gpu", "--user-data-dir=/tmp/am-pptr-profile"] });
  const page = await browser.newPage();
  await page.setViewport({ width: 1280, height: 860 });
  const errors = []; page.on("pageerror", (e) => errors.push(e.message));
  await page.goto(BASE + "/", { waitUntil: "networkidle0" });
  await page.waitForSelector(".card", { timeout: 15000 });
  check("landing renders agent-chosen cards", (await page.$$(".card")).length >= 4);
  check("React app mounted in #root", await page.evaluate(() => !!document.querySelector("#root > .testbar") && !!document.querySelector("#root main#page #stage [data-component=cards]")));
  const badge = await page.$eval("#agentBadge", (n) => n.textContent);
  check("agent mode badge shown", /fallback|built-in|AI:|LLM/.test(badge), badge);

  // ask(): type into the chat popup and wait for the agent's reply (LLM replies take a few seconds)
  const ask = async (text) => {
    const n = (await page.$$(".msg.bot")).length;
    await page.type("#chatInput", text);
    await page.keyboard.press("Enter");
    await page.waitForFunction((n) => document.querySelectorAll(".msg.bot").length > n, { timeout: 60000 }, n);
    await sleep(300);
  };
  // chat search
  await page.click("#chatLauncher");
  await ask("show me bikes");
  const titles = await page.$$eval("#stage .card h3", (ns) => ns.map((n) => n.textContent));
  check("chat search renders bike cards", titles.length > 0 && titles.every((t) => /bike/i.test(t)), titles.join(" | "));
  if (SHOTS) { await sleep(600); await page.screenshot({ path: SHOTS + "/1-landing-chat-search.png" }); }

  const feeBps = (await (await fetch(BASE + "/api/status")).json()).fee_bps;
  const money = (c) => "$" + (c / 100).toFixed(2);

  // online checkout: first card that offers online payment
  const pick = await page.evaluate(() => {
    const c = [...document.querySelectorAll("#stage .card")].find((c) => c.querySelector("button.btn:not(.cash)"));
    return c && { id: c.dataset.listing, price: c.querySelector(".price").childNodes[0].textContent };
  });
  check("an online-payable listing is visible", !!pick, pick && pick.price);
  const priceC = Math.round(parseFloat(pick.price.slice(1)) * 100), feeC = Math.round(priceC * feeBps / 10000);
  await page.click(`.card[data-listing="${pick.id}"] button.btn:not(.cash)`);
  await page.waitForSelector("[data-component=checkout]", { timeout: 15000 });
  const fee = await page.$eval("[data-testid=fee]", (n) => n.textContent);
  const total = await page.$eval("[data-testid=total]", (n) => n.textContent);
  check(`checkout shows ${feeBps / 100}% fee and total`, fee === money(feeC) && total === money(priceC + feeC), `price ${pick.price} fee ${fee} total ${total}`);
  if (SHOTS) { await sleep(600); await page.screenshot({ path: SHOTS + "/2-checkout-fee.png" }); }
  await page.click("[data-component=checkout] button[type=submit]");
  await page.waitForSelector("[data-component=receipt]", { timeout: 15000 });
  const rfee = await page.$eval("[data-testid=receipt-fee]", (n) => n.textContent);
  check("test payment confirms, receipt shows fee", rfee === money(feeC), rfee);

  // cash meetup: first card offering cash
  await ask("show me everything");
  const cashId = await page.evaluate(() => { const c = [...document.querySelectorAll("#stage .card")].find((c) => c.querySelector("button.cash")); return c && c.dataset.listing; });
  await page.click(`.card[data-listing="${cashId}"] button.cash`);
  await page.waitForSelector("[data-component=cash-meetup]", { timeout: 15000 });
  const cfee = await page.$eval("[data-testid=cash-fee]", (n) => n.textContent);
  check("cash meetup shows $0 fee", cfee === "$0.00", cfee);
  if (SHOTS) { await sleep(600); await page.screenshot({ path: SHOTS + "/3-cash-meetup.png" }); }
  await page.click("[data-component=cash-meetup] button.cash");
  await page.waitForSelector("[data-component=receipt]", { timeout: 15000 });
  check("cash deal completed with $0 fee", (await page.$eval("[data-testid=receipt-fee]", (n) => n.textContent)) === "$0.00");

  // sell
  await page.click("nav [data-event=sell]");
  await page.waitForSelector("[data-component=listing-form]", { timeout: 15000 });
  await page.type("[name=title]", "Test-only bookshelf");
  await page.$eval("[name=price]", (n) => (n.value = ""));
  await page.type("[name=price]", "30");
  await page.type("[name=description]", "Fake listing created by the browser test");
  await page.click("[data-component=listing-form] button[type=submit]");
  await page.waitForFunction(() => [...document.querySelectorAll("#stage .card h3")].some((h) => h.textContent === "Test-only bookshelf"), { timeout: 15000 });
  check("listing form publishes a new card", true);

  // compare
  await ask("compare the two tutoring options");
  await page.waitForSelector("[data-component=compare]", { timeout: 15000 });
  check("compare view renders", (await page.$$("[data-component=compare] th")).length >= 3);

  // compare via card checkboxes + compare bar
  await ask("show me everything");
  await page.$$eval("#stage .card input[aria-label=compare]", (ns) => ns.slice(0, 2).forEach((n) => n.click()));
  const bar = await page.$eval(".cmpbar", (n) => ({ t: n.textContent, d: getComputedStyle(n).display }));
  await page.click(".cmpbar button");
  await page.waitForFunction(() => document.querySelectorAll("[data-component=compare] tr:first-child th").length === 3, { timeout: 15000 }).catch(() => {});
  check("compare bar: 2 selected -> compare view", bar.d === "flex" && /^2 selected/.test(bar.t) && (await page.$$("[data-component=compare] tr:first-child th")).length === 3, bar.t);

  // chat popup close / reopen
  await page.click("#chatClose");
  const closed = await page.evaluate(() => document.getElementById("chat").classList.contains("hidden") && getComputedStyle(document.getElementById("chatLauncher")).display !== "none");
  await page.click("#chatLauncher");
  const reopened = await page.evaluate(() => !document.getElementById("chat").classList.contains("hidden") && document.querySelectorAll("#log .msg").length > 5);
  check("chat popup closes and reopens with history", closed && reopened);

  check("no page JS errors", errors.length === 0, errors.join("; "));
  await browser.close();
  const passed = results.filter(Boolean).length;
  console.log(`\n${passed}/${results.length} passed`);
  process.exit(passed === results.length ? 0 : 1);
})().catch((e) => { console.error(e); process.exit(2); });