import { afterEach, describe, expect, it, vi } from "vitest";

// P2：真正断言——mock openapi-fetch，验证 client 用正确 baseUrl 初始化。
// createClient 在模块加载时被调用一次，故每个用例 resetModules + 重新 import。

const createClientMock = vi.fn(() => ({ GET: vi.fn(), POST: vi.fn() }));

vi.mock("openapi-fetch", () => ({
  default: createClientMock,
}));

afterEach(() => {
  vi.resetModules();
  vi.unstubAllEnvs();
  createClientMock.mockClear();
});

describe("api client baseUrl", () => {
  it("uses NEXT_PUBLIC_API_BASE when set", async () => {
    vi.stubEnv("NEXT_PUBLIC_API_BASE", "https://api.example.com");

    await import("./client");

    expect(createClientMock).toHaveBeenCalledTimes(1);
    expect(createClientMock).toHaveBeenCalledWith({
      baseUrl: "https://api.example.com",
    });
  });

  it("falls back to localhost when env unset", async () => {
    vi.stubEnv("NEXT_PUBLIC_API_BASE", undefined);

    await import("./client");

    expect(createClientMock).toHaveBeenCalledWith({
      baseUrl: "http://localhost:8000",
    });
  });

  it("exposes the constructed client as `api`", async () => {
    const mod = await import("./client");
    expect(mod.api).toBeDefined();
    expect(typeof mod.api.GET).toBe("function");
  });
});