// 单档分发里真的能切歌吗——选项在 ≠ 切得动。
//
// 这是用户报的那件事的终局判据：single-hsr-xilian 有两首，面板上给了下拉之后，
// 选第二首必须真的换掉 <audio> 的源。
import { withPage, sleep } from "../cdp.mjs";

const BASE = process.argv[2] ?? "http://127.0.0.1:5173";
const name = (src: unknown) => (src ? decodeURIComponent(String(src).split("/").pop() ?? "") : "(空)");

let failures = 0;
const check = (ok: unknown, label: string, detail?: unknown) => {
  if (!ok) failures++;
  console.log(`  ${ok ? "✓" : "✗"} ${label}${detail !== undefined ? `  → ${String(detail)}` : ""}`);
};

await withPage({ width: 1280, height: 720, profile: "tools/.cache/edge-single-bgm" }, async ({ send, evaluate, exceptions }) => {
  await send("Page.navigate", { url: `${BASE}/release/single-hsr-xilian/` });
  await sleep(3500);

  const src = () => evaluate(`(function(){ var a = document.getElementById("background-music"); return a ? a.src : null; })()`);
  const bgm = (v) => evaluate(`window.wallpaperPropertyListener.applyUserProperties({ bgm: { value: ${JSON.stringify(v)} } })`);

  const initial = await src();
  check(name(initial) === "zaiduheni.flac", "默认是第一首「再度和你」", name(initial));

  // 「昔涟」在自增 id 里是 "3"（kv37 的「版本 PV」占 "1"，xilian 两首是 "2"/"3"）
  await bgm("3");
  await sleep(500);
  const afterSwitch = await src();
  check(name(afterSwitch) === "xilian-src.flac", "选「昔涟」→ 音源真的换了", name(afterSwitch));

  await bgm("2");
  await sleep(500);
  const back = await src();
  check(name(back) === "zaiduheni.flac", "再选回「再度和你」→ 换回来", name(back));

  check(exceptions.length === 0, "0 未捕获异常", exceptions.slice(0, 2).join(" | ") || "无");
});

console.log(failures === 0 ? "\n单档切歌：通过" : `\n单档切歌：失败 ${failures} 处`);
process.exit(failures === 0 ? 0 : 1);