import { writeFileSync } from "node:fs";

const cdpPort = process.env.CDP_PORT ?? "9225";
const baseUrl = process.env.SITE_URL ?? "http://127.0.0.1:4323";
const pages = await fetch(`http://127.0.0.1:${cdpPort}/json/list`).then((response) => response.json());
const page = pages.find((entry) => entry.type === "page");
if (!page) throw new Error(`CDP ${cdpPort} 没有可用页面`);

const socket = new WebSocket(page.webSocketDebuggerUrl);
await new Promise((resolve, reject) => {
  socket.addEventListener("open", resolve, { once: true });
  socket.addEventListener("error", reject, { once: true });
});

let nextId = 0;
const pending = new Map();
const exceptions = [];
socket.addEventListener("message", (event) => {
  const message = JSON.parse(event.data);
  if (message.id && pending.has(message.id)) {
    const { resolve, reject } = pending.get(message.id);
    pending.delete(message.id);
    if (message.error) reject(new Error(message.error.message));
    else resolve(message.result);
  }
  if (message.method === "Runtime.exceptionThrown") {
    exceptions.push(message.params.exceptionDetails.exception?.description ?? message.params.exceptionDetails.text);
  }
});

const command = (method, params = {}) => new Promise((resolve, reject) => {
  const id = ++nextId;
  pending.set(id, { resolve, reject });
  socket.send(JSON.stringify({ id, method, params }));
});
const pause = (milliseconds) => new Promise((resolve) => setTimeout(resolve, milliseconds));
const evaluate = async (expression) => {
  const result = await command("Runtime.evaluate", { expression, returnByValue: true, awaitPromise: true });
  if (result.exceptionDetails) throw new Error(result.exceptionDetails.exception?.description ?? result.exceptionDetails.text);
  return result.result.value;
};
const navigate = async (path) => {
  await command("Page.navigate", { url: `${baseUrl}${path}` });
  for (let attempt = 0; attempt < 70; attempt += 1) {
    await pause(100);
    if (await evaluate("document.readyState === 'complete'")) return;
  }
  throw new Error(`${path} 加载超时`);
};
const screenshot = async (path) => {
  const result = await command("Page.captureScreenshot", {
    format: "png",
    captureBeyondViewport: false,
  });
  writeFileSync(path, Buffer.from(result.data, "base64"));
};

await command("Page.enable");
await command("Runtime.enable");
await command("Emulation.setDeviceMetricsOverride", {
  width: 1440,
  height: 1100,
  deviceScaleFactor: 1,
  mobile: false,
});
await navigate("/agents/");
await screenshot("/tmp/llm-atlas-agents-desktop.png");

const overview = await evaluate(`(() => ({
  title: document.querySelector("h1")?.textContent.trim(),
  sections: document.querySelectorAll(".article-section").length,
  tocLinks: document.querySelectorAll(".side-rail a").length,
  paperLinks: document.querySelectorAll(".paper-chain a").length,
  labTabs: document.querySelectorAll("[data-agent-tab]").length,
  labPanels: document.querySelectorAll("[data-agent-panel]").length,
  navLinks: document.querySelectorAll(".top-nav a").length,
  documentOverflow: document.documentElement.scrollWidth - document.documentElement.clientWidth,
}))()`);

const loop = await evaluate(`(() => {
  const root = document.querySelector("[data-agent-lab]");
  const read = () => ({
    status: root.querySelector("[data-loop-status]").textContent.trim(),
    observation: root.querySelector("[data-loop-observation]").textContent.trim(),
    recovery: root.querySelector("[data-loop-recovery]").textContent.trim(),
    finalState: root.querySelector("[data-loop-final]").textContent.trim(),
    takeaway: root.querySelector("[data-loop-takeaway]").textContent.trim(),
  });
  const initial = read();
  root.querySelector('[data-loop-mode="direct"]').click();
  root.querySelector('[data-loop-fault="schema"]').click();
  root.querySelector("[data-loop-next]").click();
  root.querySelector("[data-loop-next]").click();
  return { initial, directSchema: read() };
})()`);

const contract = await evaluate(`(() => {
  const root = document.querySelector("[data-agent-lab]");
  root.querySelector('[data-agent-tab="contract"]').click();
  root.querySelector('[data-contract-case="wrongstate"]').click();
  return {
    syntax: root.querySelector('[data-contract-score="syntax"]').textContent.trim(),
    execution: root.querySelector('[data-contract-score="execution"]').textContent.trim(),
    finalState: root.querySelector('[data-contract-score="final"]').textContent.trim(),
    takeaway: root.querySelector("[data-contract-takeaway]").textContent.trim(),
    visiblePanel: root.querySelector("[data-agent-panel]:not([hidden])").dataset.agentPanel,
  };
})()`);

const reliability = await evaluate(`(() => {
  const root = document.querySelector("[data-agent-lab]");
  root.querySelector('[data-agent-tab="reliability"]').click();
  const k = root.querySelector("[data-rel-k]");
  const read = () => ({
    passAt: root.querySelector("[data-rel-pass-at]").textContent.trim(),
    passHat: root.querySelector("[data-rel-pass-hat]").textContent.trim(),
    sideRisk: root.querySelector("[data-rel-side]").textContent.trim(),
    takeaway: root.querySelector("[data-rel-takeaway]").textContent.trim(),
  });
  const initial = read();
  k.value = "2";
  k.dispatchEvent(new Event("input", { bubbles: true }));
  const k2 = read();
  k.value = "8";
  k.dispatchEvent(new Event("input", { bubbles: true }));
  root.querySelector('[data-rel-idempotent="false"]').click();
  const nonIdempotent = read();
  return { initial, k2, nonIdempotent };
})()`);

const rl = await evaluate(`(() => {
  const root = document.querySelector("[data-agent-lab]");
  root.querySelector('[data-agent-tab="rl"]').click();
  const read = () => ({
    utilization: root.querySelector("[data-rl-util]").textContent.trim(),
    lostWork: root.querySelector("[data-rl-lost]").textContent.trim(),
    modelState: root.querySelector("[data-rl-model-state]").textContent.trim(),
    worldState: root.querySelector("[data-rl-world-state]").textContent.trim(),
    takeaway: root.querySelector("[data-rl-takeaway]").textContent.trim(),
  });
  const full = read();
  root.querySelector('[data-rl-mode="wait"]').click();
  const wait = read();
  const firstTab = root.querySelector('[data-agent-tab="loop"]');
  firstTab.focus();
  firstTab.dispatchEvent(new KeyboardEvent("keydown", { key: "End", bubbles: true }));
  return {
    full,
    wait,
    keyboardSelected: root.querySelector('[data-agent-tab][aria-selected="true"]').dataset.agentTab,
    keyboardVisible: root.querySelector("[data-agent-panel]:not([hidden])").dataset.agentPanel,
  };
})()`);

await evaluate(`document.querySelector("[data-agent-lab]").scrollIntoView({ block: "start", behavior: "instant" })`);
await pause(180);
await screenshot("/tmp/llm-atlas-agents-lab-desktop.png");

await navigate("/");
const home = await evaluate(`(() => ({
  releaseCards: document.querySelectorAll(".release-card").length,
  firstRelease: document.querySelector(".release-card h2").textContent.trim(),
  firstHref: document.querySelector(".release-card").getAttribute("href"),
  paperCount: document.querySelector(".hero-stats div:nth-child(3) b").textContent.trim(),
  navLinks: document.querySelectorAll(".top-nav a").length,
}))()`);

await navigate("/papers/");
const papers = await evaluate(`(() => {
  const button = [...document.querySelectorAll("[data-filter]")].find((node) => node.textContent.trim() === "Agent");
  button?.click();
  return {
    total: document.querySelectorAll("[data-paper]").length,
    agentVisible: document.querySelectorAll("[data-paper]:not([hidden])").length,
    hasAgentFilter: Boolean(button),
  };
})()`);

await command("Emulation.setDeviceMetricsOverride", {
  width: 390,
  height: 844,
  deviceScaleFactor: 1,
  mobile: true,
});
await navigate("/agents/");
const mobile = await evaluate(`(() => {
  const root = document.querySelector("[data-agent-lab]");
  root.scrollIntoView({ block: "start", behavior: "instant" });
  const toggle = document.querySelector("#menu-toggle");
  toggle?.click();
  return {
    documentOverflow: document.documentElement.scrollWidth - document.documentElement.clientWidth,
    menuVisible: getComputedStyle(toggle).display !== "none",
    menuOpen: toggle.getAttribute("aria-expanded"),
    mobileLinks: document.querySelectorAll("#mobile-nav a").length,
    tabs: root.querySelectorAll("[data-agent-tab]").length,
    offenders: [...document.querySelectorAll("body *")]
      .filter((node) => node.getBoundingClientRect().right > document.documentElement.clientWidth + 1)
      .slice(0, 12)
      .map((node) => ({
        tag: node.tagName,
        className: typeof node.className === "string" ? node.className : "",
        right: Math.round(node.getBoundingClientRect().right),
        width: Math.round(node.getBoundingClientRect().width),
      })),
  };
})()`);
await pause(180);
await screenshot("/tmp/llm-atlas-agents-mobile.png");

const report = { overview, loop, contract, reliability, rl, home, papers, mobile, exceptions };
console.log(JSON.stringify(report, null, 2));

const numeric = (value) => Number.parseFloat(value);
const failures = [];
if (!overview.title.includes("可靠行动")) failures.push("章节标题异常");
if (overview.sections !== 28 || overview.tocLinks !== 28) failures.push("章节/目录数量异常");
if (overview.paperLinks !== 52) failures.push("正式论文链不是 52 个节点");
if (overview.labTabs !== 4 || overview.labPanels !== 4) failures.push("四联实验结构异常");
if (overview.navLinks !== 17 || home.navLinks !== 17 || mobile.mobileLinks !== 17) failures.push("全站导航未同步 Agent 专题");
if (overview.documentOverflow > 1 || mobile.documentOverflow > 1) failures.push("桌面或移动端存在横向溢出");
if (loop.initial.finalState !== "UNVERIFIED" || loop.directSchema.finalState !== "FAILED") failures.push("控制循环终局状态异常");
if (!loop.directSchema.observation.includes("ERROR schema") || loop.directSchema.recovery !== "FRAGILE") failures.push("Direct/schema 故障传播异常");
if (contract.syntax !== "100%" || contract.execution !== "100%" || contract.finalState !== "0%") failures.push("工具契约三层评分异常");
if (!contract.takeaway.includes("final-state") || contract.visiblePanel !== "contract") failures.push("工具契约终局验证解释异常");
if (numeric(reliability.initial.passAt) < 99.9 || Math.abs(numeric(reliability.initial.passHat) - 16.78) > 0.02) failures.push("pass@k / pass^k 初始计算异常");
if (numeric(reliability.initial.passAt) <= numeric(reliability.k2.passAt) || numeric(reliability.initial.passHat) >= numeric(reliability.k2.passHat)) failures.push("k 增长时两类可靠性没有反向变化");
if (reliability.nonIdempotent.sideRisk === "LOW") failures.push("非幂等写操作风险没有提升");
if (numeric(rl.wait.utilization) >= numeric(rl.full.utilization) || numeric(rl.wait.lostWork) <= numeric(rl.full.lostWork)) failures.push("wait-all 长尾/重算方向异常");
if (!rl.wait.takeaway.includes("wait-all") || rl.keyboardSelected !== "rl" || rl.keyboardVisible !== "rl") failures.push("长程 RL 解释或键盘导航异常");
if (home.releaseCards !== 12 || !home.firstRelease.includes("原生多模态") || home.firstHref !== "/multimodal/") failures.push("首页 Agent 首发入口异常");
if (home.paperCount !== "355" || papers.total !== 355 || !papers.hasAgentFilter || papers.agentVisible < 52) failures.push("论文库 Agent 标签或论文总数异常");
if (!mobile.menuVisible || mobile.menuOpen !== "true" || mobile.tabs !== 4) failures.push("移动端导航或实验异常");
if (exceptions.length) failures.push(`浏览器异常：${exceptions.join(" | ")}`);

if (failures.length) {
  console.error(`\nFAIL\n- ${failures.join("\n- ")}`);
  process.exitCode = 1;
} else {
  console.log("\nPASS agents browser regression");
}

socket.close();