import { describe, it, expect, afterEach } from "vitest";
import { buildEnvContext, 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("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;
    }
  });
});