/**
 * lib/camera 單元測試（塊 1）
 *
 * 驗證 buildStreamUrl：
 *   - jsdom（window 存在）+ 無 NEXT_PUBLIC_API_BASE → base = ""（同 origin），回相對路徑
 *   - cacheBust 以 `_t=` query 附加，且做 URL encode
 *   - 已含 query 的 URL 用 `&` 串接
 *   - 相對路徑補開頭斜線
 */
import { afterEach, describe, expect, it } from "vitest";

import { buildStreamUrl, CAMERA_STREAM_PATH } from "./camera";

const ORIGINAL = process.env.NEXT_PUBLIC_API_BASE;

afterEach(() => {
  if (ORIGINAL === undefined) delete process.env.NEXT_PUBLIC_API_BASE;
  else process.env.NEXT_PUBLIC_API_BASE = ORIGINAL;
});

describe("buildStreamUrl", () => {
  it("同 origin（無 env）回相對路徑，不含 cacheBust 時無 query", () => {
    delete process.env.NEXT_PUBLIC_API_BASE;
    expect(buildStreamUrl(CAMERA_STREAM_PATH)).toBe("/api/camera/stream");
  });

  it("附加 cacheBust 為 _t query 並 encode", () => {
    delete process.env.NEXT_PUBLIC_API_BASE;
    expect(buildStreamUrl("/api/camera/stream", "dev 1")).toBe(
      "/api/camera/stream?_t=dev%201",
    );
  });

  it("已含 query 時用 & 串接 cacheBust", () => {
    delete process.env.NEXT_PUBLIC_API_BASE;
    expect(buildStreamUrl("/api/camera/stream?x=1", "abc")).toBe(
      "/api/camera/stream?x=1&_t=abc",
    );
  });

  it("跨 origin（有 env）前綴 base URL", () => {
    process.env.NEXT_PUBLIC_API_BASE = "https://api.example.com";
    expect(buildStreamUrl("/api/camera/stream")).toBe(
      "https://api.example.com/api/camera/stream",
    );
  });

  it("相對路徑無開頭斜線時自動補上", () => {
    delete process.env.NEXT_PUBLIC_API_BASE;
    expect(buildStreamUrl("api/camera/stream")).toBe("/api/camera/stream");
  });
});