import { describe, expect, it } from "vitest";
import type { AutomationDriver } from "../../src/driver/types";
import { createEngine } from "../../src/engine/engine";
import { WindowsDriver } from "../../src/driver/windows/windows-driver";

describe("driver 平台自动选择（迁移指南五件小事 #2）", () => {
  it("win32 上惰性创建 WindowsDriver 且实例缓存", () => {
    const engine = createEngine();
    expect(engine.driver).toBeInstanceOf(WindowsDriver);
    expect(engine.driver).toBe(engine.driver);
  });

  it("非 win32 访问 driver 抛 platform_unsupported", () => {
    const engine = createEngine();
    const original = process.platform;
    Object.defineProperty(process, "platform", { value: "darwin", configurable: true });
    try {
      expect(() => engine.driver).toThrowError(/暂不支持桌面自动化驱动/);
    } finally {
      Object.defineProperty(process, "platform", { value: original, configurable: true });
    }
  });
});

describe("createEngine 注入（迁移阶段1-A1）", () => {
  const fakeDriver = (): AutomationDriver =>
    ({
      mouse: {},
      keyboard: {},
      window: {},
      screen: { size: async () => ({ x: 0, y: 0, width: 800, height: 600 }) },
      element: {}
    }) as unknown as AutomationDriver;

  it("createEngine 可注入自定义 driver", () => {
    const driver = fakeDriver();
    const engine = createEngine({ driver });
    expect(engine.driver).toBe(driver);
  });

  it("注入后不触发平台自动选择（darwin 上也可用）", () => {
    const driver = fakeDriver();
    const engine = createEngine({ driver });
    const original = process.platform;
    Object.defineProperty(process, "platform", { value: "darwin", configurable: true });
    try {
      expect(engine.driver).toBe(driver);
      expect(engine.driver.screen.size).toBeTruthy();
    } finally {
      Object.defineProperty(process, "platform", { value: original, configurable: true });
    }
  });

  it("两个引擎注入不同 driver 互不影响", () => {
    const driverA = fakeDriver();
    const driverB = fakeDriver();
    const engineA = createEngine({ driver: driverA });
    const engineB = createEngine({ driver: driverB });
    expect(engineA.driver).toBe(driverA);
    expect(engineB.driver).toBe(driverB);
    expect(engineA.driver).not.toBe(engineB.driver);
  });

  it("setDriver 可后置替换", () => {
    const engine = createEngine();
    const driver = fakeDriver();
    engine.setDriver(driver);
    expect(engine.driver).toBe(driver);
  });
});