import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { mkdtemp, rm } from "node:fs/promises";
import os from "node:os";
import path from "node:path";

const ORIGINAL_ENV = { ...process.env };

describe("storage fallback", () => {
  let tempDir: string;

  beforeEach(async () => {
    vi.resetModules();
    process.env = { ...ORIGINAL_ENV };
    delete process.env.BUILT_IN_FORGE_API_URL;
    delete process.env.BUILT_IN_FORGE_API_KEY;
    tempDir = await mkdtemp(path.join(os.tmpdir(), "tennis-storage-"));
    process.env.LOCAL_STORAGE_DIR = tempDir;
  });

  afterEach(async () => {
    process.env = { ...ORIGINAL_ENV };
    await rm(tempDir, { recursive: true, force: true });
  });

  it("stores files locally when remote storage is not configured", async () => {
    const { storagePut, storageGet } = await import("./storage");

    const stored = await storagePut("videos/test/sample.webm", Buffer.from("demo"));
    const loaded = await storageGet("videos/test/sample.webm");

    expect(stored).toEqual({
      key: "videos/test/sample.webm",
      url: "/uploads/videos/test/sample.webm",
    });
    expect(loaded).toEqual({
      key: "videos/test/sample.webm",
      url: "/uploads/videos/test/sample.webm",
    });
  });

  it("builds externally accessible URLs for local assets", async () => {
    process.env.APP_PUBLIC_BASE_URL = "https://te.hao.work/";
    const { toExternalAssetUrl } = await import("./storage");

    expect(toExternalAssetUrl("/uploads/videos/test/sample.webm")).toBe(
      "https://te.hao.work/uploads/videos/test/sample.webm"
    );
    expect(toExternalAssetUrl("https://cdn.example.com/demo.jpg")).toBe(
      "https://cdn.example.com/demo.jpg"
    );
  });
});