import { describe, it, expect, afterEach, vi } from "vitest";
import {
  buildEnvContext,
  collectHighEntropyHints,
  parseUtm,
  sanitizeUrl,
  pageContext,
} from "../src/context";

// userAgent 是 Navigator.prototype 上的 accessor；实例上 defineProperty 覆盖，delete 还原
function stubUA(ua: string) {
  Object.defineProperty(navigator, "userAgent", { value: ua, configurable: true });
}
afterEach(() => {
  delete (navigator as { userAgent?: string }).userAgent;
});

const UA_IPHONE_SAFARI =
  "Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (Version/17.0 Mobile/15E148 Safari/604.1";
const UA_TABLET =
  "Mozilla/5.0 (X11; Tablet; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36";
// 真实 iPad Safari UA 恒含 Mobile 串——规格修订：iPad/Tablet 先判，归"平板"
const UA_IPAD_REAL =
  "Mozilla/5.0 (iPad; CPU OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (Version/16.0 Mobile/15E148 Safari/604.1";
// Firefox Android 平板 UA：显式 "; Tablet;" 且含 Android 无 Mobile——旧顺序会误判手机
const UA_ANDROID_TABLET_FF =
  "Mozilla/5.0 (Android 13; Tablet; rv:121.0) Gecko/121.0 Firefox/121.0";
// iOS Firefox UA：FxiOS + 尾部恒含 Safari/604.1——Firefox 检测须先于 Safari
const UA_IOS_FIREFOX =
  "Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/121.0 Mobile/15E148 Safari/604.1";
const UA_WIN_CHROME =
  "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36";
const UA_WIN_EDGE =
  "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.0.0";
const UA_ANDROID_WECHAT =
  "Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.36 MicroMessenger/8.0.49";

describe("parseUtm", () => {
  it("只保留 utm_ 前缀参数", () => {
    expect(parseUtm("?utm_source=google&utm_medium=cpc&other=1&q=中文")).toEqual({
      utm_source: "google",
      utm_medium: "cpc",
    });
  });

  it("键值各截 100 字符", () => {
    const long = "x".repeat(150);
    const out = parseUtm(`?utm_${long}=${long}`);
    expect(Object.keys(out)).toHaveLength(1);
    const key = Object.keys(out)[0]!;
    expect(key).toHaveLength(100);
    expect(out[key]).toHaveLength(100);
  });

  it("无 utm 参数时返回空对象", () => {
    expect(parseUtm("?a=1&b=2")).toEqual({});
  });
});

describe("sanitizeUrl", () => {
  it("删除黑名单参数，保留其余（含空值），不误伤 monkey", () => {
    expect(sanitizeUrl("/p?email=a@b.com&token=x&id=3&utm_source=g&monkey=1")).toBe(
      "/p?id=3&utm_source=g&monkey=1",
    );
  });

  it("空值参数保留", () => {
    expect(sanitizeUrl("/p?empty=&id=1")).toBe("/p?empty=&id=1");
  });

  it("黑名单整键精确匹配（大小写不敏感），子串参数不删", () => {
    expect(sanitizeUrl("/p?Token=1&email=x@y.z&monkey=1&utoken=2")).toBe("/p?monkey=1&utoken=2");
  });

  it("全部被删时不残留 ?，无查询串时原样返回", () => {
    expect(sanitizeUrl("/p?token=1&password=2")).toBe("/p");
    expect(sanitizeUrl("/p/plain")).toBe("/p/plain");
  });
});

describe("buildEnvContext", () => {
  it("happy-dom 默认 UA：含全部必需键且 device_type 合法", () => {
    // 默认 UA: Mozilla/5.0 (X11; Win32 x64) AppleWebKit/537.36 ... HappyDOM/0.0.0
    const env = buildEnvContext();
    expect(env.device_type).toBe("PC"); // 默认 UA 无 Mobile/Android/iPhone/iPad/Tablet
    expect(["PC", "手机", "平板"]).toContain(env.device_type);
    expect(typeof env.os).toBe("string");
    expect(typeof env.browser).toBe("string");
    expect(typeof env.language).toBe("string");
    expect(env.language).toBe(navigator.language);
    expect(typeof env.timezone).toBe("string");
    expect(env.screen).toBe(`${screen.width}x${screen.height}`);
    expect(typeof env.hardware_concurrency).toBe("number"); // happy-dom 提供
    expect("connection" in env).toBe(false); // happy-dom 无 connection
  });

  it("iPhone UA → 手机 + iOS + Safari", () => {
    stubUA(UA_IPHONE_SAFARI);
    const env = buildEnvContext();
    expect(env.device_type).toBe("手机");
    expect(env.os).toBe("iOS");
    expect(env.browser).toBe("Safari");
  });

  it("Tablet UA（无 Mobile/Android/iPhone 串）→ 平板", () => {
    stubUA(UA_TABLET);
    expect(buildEnvContext().device_type).toBe("平板");
  });

  it("真实 iPad UA（含 Mobile 串）→ 平板：规格修订 iPad/Tablet 先于 Mobile 判", () => {
    stubUA(UA_IPAD_REAL);
    const env = buildEnvContext();
    expect(env.device_type).toBe("平板");
    expect(env.os).toBe("iOS");
    expect(env.browser).toBe("Safari");
  });

  it("Firefox Android 平板 UA（Android + '; Tablet;'）→ 平板", () => {
    stubUA(UA_ANDROID_TABLET_FF);
    const env = buildEnvContext();
    expect(env.device_type).toBe("平板");
    expect(env.os).toBe("Android");
    expect(env.browser).toBe("Firefox");
  });

  it("iOS Firefox UA（FxiOS + Safari 串）→ Firefox：FxiOS 先于 Safari 判", () => {
    stubUA(UA_IOS_FIREFOX);
    const env = buildEnvContext();
    expect(env.browser).toBe("Firefox");
    expect(env.device_type).toBe("手机");
    expect(env.os).toBe("iOS");
  });

  it("Windows Chrome UA → PC + Windows + Chrome", () => {
    stubUA(UA_WIN_CHROME);
    const env = buildEnvContext();
    expect(env.device_type).toBe("PC");
    expect(env.os).toBe("Windows");
    expect(env.browser).toBe("Chrome");
  });

  it("Edg UA（内嵌 Chrome 串）→ browser 为 Edge，验证 Edg 先于 Chrome", () => {
    stubUA(UA_WIN_EDGE);
    const env = buildEnvContext();
    expect(env.browser).toBe("Edge");
    expect(env.os).toBe("Windows");
  });

  it("微信 UA（内嵌 Chrome/Safari 串）→ browser 为 WeChat", () => {
    stubUA(UA_ANDROID_WECHAT);
    const env = buildEnvContext();
    expect(env.browser).toBe("WeChat");
    expect(env.device_type).toBe("手机");
    expect(env.os).toBe("Android");
  });
});

describe("buildEnvContext 扩展采集（移动端设备信息最大化）", () => {
  const restore: Array<() => void> = [];
  /** 实例属性覆盖 + 注册还原（navigator/screen/window 各 API 均 accessor，defineProperty 覆盖） */
  const stub = (obj: object, key: string, value: unknown) => {
    Object.defineProperty(obj, key, { value, configurable: true });
    restore.push(() => delete (obj as Record<string, unknown>)[key]);
  };
  /** 按查询串精确命中的 matchMedia 桩（orientation/color_scheme/standalone 共用） */
  const stubMatchMedia = (matched: string[] = []) => {
    vi.stubGlobal(
      "matchMedia",
      (q: string) => ({ matches: matched.includes(q), media: q }),
    );
  };
  afterEach(() => {
    restore.splice(0).forEach((fn) => fn());
    vi.unstubAllGlobals();
  });

  it("同步扩展键全量采集（dpr/视口/方向/触点/内存/语言/深浅色/standalone/网络/微信版本）", () => {
    stubUA(UA_ANDROID_WECHAT);
    stub(window, "devicePixelRatio", 3);
    stub(window, "innerWidth", 390);
    stub(window, "innerHeight", 844);
    stub(screen, "orientation", { type: "portrait-primary" });
    stub(navigator, "maxTouchPoints", 5);
    stub(navigator, "deviceMemory", 8);
    stub(navigator, "languages", ["zh-CN", "en", "ja"]);
    stub(navigator, "connection", {
      effectiveType: "4g",
      downlink: 10,
      rtt: 50,
      saveData: true,
    });
    stubMatchMedia(["(prefers-color-scheme: dark)"]); // orientation 走 screen.orientation，深色走桩

    const env = buildEnvContext();
    expect(env.device_pixel_ratio).toBe(3);
    expect(env.viewport).toBe("390x844");
    expect(env.orientation).toBe("portrait-primary"); // screen.orientation.type 优先
    expect(env.max_touch_points).toBe(5);
    expect(env.device_memory).toBe(8);
    expect(env.languages).toBe("zh-CN,en,ja");
    expect(env.color_scheme).toBe("dark");
    expect(env.standalone).toBe("0"); // 桩未命中 standalone 查询
    expect(env.network_downlink).toBe(10);
    expect(env.network_rtt).toBe(50);
    expect(env.save_data).toBe("1");
    expect(env.wechat_version).toBe("8.0.49"); // UA 的 MicroMessenger/8.0.49
  });

  it("screen.orientation 缺失 → matchMedia 兜底 portrait/landscape", () => {
    stubMatchMedia(["(orientation: portrait)"]);
    expect(buildEnvContext().orientation).toBe("portrait");
    stubMatchMedia([]); // portrait 不匹配 → landscape
    expect(buildEnvContext().orientation).toBe("landscape");
  });

  it("languages 超 100 截断；saveData 布尔转 1/0", () => {
    stub(navigator, "languages", ["a".repeat(60), "b".repeat(60)]);
    stub(navigator, "connection", { effectiveType: "3g", saveData: false });
    const env = buildEnvContext();
    expect(env.languages).toHaveLength(100);
    expect(env.save_data).toBe("0");
  });

  it("能力缺失环境：可选键不挂、不崩溃（无 matchMedia/触点/内存/连接）", () => {
    stubUA(UA_WIN_CHROME); // 无 MicroMessenger → 无 wechat_version
    stub(window, "matchMedia", undefined); // matchMedia 不可用
    stub(navigator, "maxTouchPoints", undefined);
    stub(navigator, "languages", undefined);
    const env = buildEnvContext();
    expect("orientation" in env).toBe(false); // screen.orientation 与 matchMedia 双缺
    expect("color_scheme" in env).toBe(false);
    expect("standalone" in env).toBe(false);
    expect("max_touch_points" in env).toBe(false);
    expect("languages" in env).toBe(false);
    expect("device_memory" in env).toBe(false);
    expect("network_downlink" in env).toBe(false);
    expect("save_data" in env).toBe(false);
    expect("wechat_version" in env).toBe(false);
    // 基础键照常（老环境只是缺扩展信号，主采集不受影响）
    expect(env.device_type).toBe("PC");
    expect(env.os).toBe("Windows");
  });
});

describe("collectHighEntropyHints（UA-CH 高熵提示）", () => {
  const restore: Array<() => void> = [];
  const stubUAD = (impl: (hints: string[]) => Promise<Record<string, unknown>>) => {
    Object.defineProperty(navigator, "userAgentData", {
      value: { getHighEntropyValues: impl },
      configurable: true,
    });
    restore.push(() => delete (navigator as { userAgentData?: unknown }).userAgentData);
  };
  afterEach(() => restore.splice(0).forEach((fn) => fn()));

  it("getHighEntropyValues → device_model/platform_version/architecture/bitness", async () => {
    stubUAD(async () => ({
      model: "Pixel 7",
      platformVersion: "13.0.0",
      architecture: "arm",
      bitness: "64",
      fullVersionList: [], // 未请求的键忽略
    }));
    expect(await collectHighEntropyHints()).toEqual({
      device_model: "Pixel 7",
      platform_version: "13.0.0",
      architecture: "arm",
      bitness: "64",
    });
  });

  it("型号超长截断（64/32/16/8 各档）", async () => {
    stubUAD(async () => ({
      model: "M".repeat(80),
      platformVersion: "P".repeat(40),
      architecture: "A".repeat(20),
      bitness: "B".repeat(10),
    }));
    const hints = await collectHighEntropyHints();
    expect(hints.device_model).toHaveLength(64);
    expect(hints.platform_version).toHaveLength(32);
    expect(hints.architecture).toHaveLength(16);
    expect(hints.bitness).toHaveLength(8);
  });

  it("空值键不挂（model 空串等）", async () => {
    stubUAD(async () => ({ model: "", platformVersion: undefined, architecture: null }));
    expect(await collectHighEntropyHints()).toEqual({});
  });

  it("无 userAgentData / getHighEntropyValues 抛异常 → 空对象不崩", async () => {
    expect(await collectHighEntropyHints()).toEqual({}); // happy-dom 默认无 userAgentData
    stubUAD(() => Promise.reject(new Error("denied")));
    expect(await collectHighEntropyHints()).toEqual({});
  });
});

describe("pageContext", () => {
  it("path 清洗 + utm 提取 + title 读取", async () => {
    await (window as any).happyDOM.setURL("http://localhost/p?token=1&utm_source=g");
    document.title = "测试页";
    const ctx = pageContext();
    expect(ctx.path).toBe("/p?utm_source=g"); // token 已删，utm_source 保留
    expect(ctx.title).toBe("测试页");
    expect(ctx.utm).toEqual({ utm_source: "g" });
    expect(ctx.referrer).toBe("");
    expect(ctx.referrer_domain).toBe("");
  });

  it("referrer_domain 提取 hostname，非法/空 referrer 降级空串", () => {
    const stub = (v: string) =>
      Object.defineProperty(document, "referrer", { value: v, configurable: true });
    try {
      stub("https://www.google.com/search?q=x");
      expect(pageContext().referrer_domain).toBe("www.google.com");
      stub("not a url");
      expect(pageContext().referrer_domain).toBe("");
      stub("");
      expect(pageContext().referrer_domain).toBe("");
    } finally {
      delete (document as { referrer?: string }).referrer;
    }
  });
});