// tests/detect-captcha.test.js
// 测试 content.js 中的 detectCaptcha：各类验证码场景识别
// 通过 vm 在沙箱中加载 content.js，注入 mock document
// 运行：node --test tests/detect-captcha.test.js

const { describe, it, beforeEach } = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const path = require("node:path");
const vm = require("node:vm");

// 创建一个最小化的 mock document，支持 querySelector / querySelectorAll
// elements 是一个选择器 -> 元素对象的映射；querySelector 返回第一个匹配
function createMockDoc(elements) {
  return {
    querySelector(selector) {
      // 简化：把逗号分隔的选择器拆开，返回第一个命中的
      const parts = selector.split(",").map((s) => s.trim());
      for (const sel of parts) {
        if (elements[sel]) return elements[sel];
      }
      return null;
    },
    querySelectorAll(selector) {
      const parts = selector.split(",").map((s) => s.trim());
      const result = [];
      for (const sel of parts) {
        if (elements[sel]) result.push(elements[sel]);
      }
      return result;
    },
    body: {},
  };
}

// 加载 content.js 到 vm 沙箱，返回沙箱上下文
function loadContentJs(mockDoc) {
  const code = fs.readFileSync(path.join(__dirname, "..", "content.js"), "utf8");
  const sandbox = {
    URL: globalThis.URL,
    window: { location: { href: "https://example.com/login" } },
    document: mockDoc,
    chrome: {
      runtime: {
        onMessage: { addListener() {} },
      },
      // i18n mock：getMessage 返回 key 自身作为文案（fallback）
      i18n: { getMessage: (key) => key || "" },
      storage: {
        local: { get: async () => ({}), set: async () => {}, remove: async () => {} },
        session: { get: async () => ({}), set: async () => {}, remove: async () => {} },
      },
    },
    MutationObserver: class {
      observe() {}
    },
    setTimeout,
    clearTimeout,
    console,
  };
  // 让 utils.js 提供的 isDomainMatch / escapeHtml 在沙箱中可用
  sandbox.globalThis = sandbox;
  vm.createContext(sandbox);
  // 先加载 utils.js
  const utilsCode = fs.readFileSync(path.join(__dirname, "..", "utils.js"), "utf8");
  vm.runInContext(utilsCode, sandbox);
  vm.runInContext(code, sandbox);
  return sandbox;
}

describe("detectCaptcha", () => {
  let sandbox;

  beforeEach(() => {
    // 默认 mock：无任何验证码元素
    const doc = createMockDoc({});
    sandbox = loadContentJs(doc);
  });

  it("无验证码元素时返回 null", () => {
    assert.equal(sandbox.detectCaptcha(), null);
  });

  it("检测到 reCAPTCHA（.g-recaptcha）", () => {
    const doc = createMockDoc({
      ".g-recaptcha": { offsetParent: {} },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.ok(r);
    assert.equal(r.type, "reCAPTCHA");
    // reason 由 i18n 提供，测试环境 fallback 到 key，断言非空字符串
    assert.ok(typeof r.reason === "string" && r.reason.length > 0);
  });

  it("检测到 reCAPTCHA iframe", () => {
    const doc = createMockDoc({
      "iframe[src*='recaptcha']": { offsetParent: {} },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "reCAPTCHA");
  });

  it("检测到 hCaptcha", () => {
    const doc = createMockDoc({
      ".h-captcha": { offsetParent: {} },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "hCaptcha");
  });

  it("检测到滑块验证码（#slider）", () => {
    const doc = createMockDoc({
      "#slider": { offsetParent: {} },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "slider/captcha");
  });

  it("检测到图形验证码容器（.captcha）", () => {
    const doc = createMockDoc({
      ".captcha": { offsetParent: {} },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "slider/captcha");
  });

  it("检测到 geetest 极验验证码", () => {
    const doc = createMockDoc({
      ".geetest": { offsetParent: {} },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "slider/captcha");
  });

  it("检测到验证码输入框（name=captcha）", () => {
    const doc = createMockDoc({
      "input[name*='captcha' i]": { offsetParent: {}, type: "text" },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "captcha-input");
  });

  it("检测到 placeholder 含「验证码」的输入框", () => {
    const doc = createMockDoc({
      "input[placeholder*='验证码' i]": { offsetParent: {}, type: "text" },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "captcha-input");
  });

  it("hidden 类型的验证码输入框不被识别（忽略隐藏域）", () => {
    const doc = createMockDoc({
      "input[name*='captcha' i]": { offsetParent: {}, type: "hidden" },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r, null);
  });

  it("offsetParent 为 null 的滑块元素不可见，不被识别", () => {
    // 滑块/输入框分支会检查 offsetParent !== null，不可见元素不触发
    const doc = createMockDoc({
      "#slider": { offsetParent: null },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r, null);
  });

  it("reCAPTCHA 优先级高于滑块/输入框", () => {
    const doc = createMockDoc({
      ".g-recaptcha": { offsetParent: {} },
      "#slider": { offsetParent: {} },
      "input[name*='captcha' i]": { offsetParent: {}, type: "text" },
    });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.equal(r.type, "reCAPTCHA");
  });

  it("返回对象包含 reason 字段说明原因", () => {
    const doc = createMockDoc({ "#captcha": { offsetParent: {} } });
    const sb = loadContentJs(doc);
    const r = sb.detectCaptcha();
    assert.ok(r && typeof r.reason === "string" && r.reason.length > 0);
  });
});