// 验收「构建开关在热更新重建里保持」。
//
// 上一版这个验证是**空的**：调试服因为参数不认识根本没起来，于是"没重建"被当成了"重建后开关还在"。
// 所以这里第一件事就是断言服务真的活着——一个不检查前置条件的验证等于没有验证。
//
// 用法：node tools/checks/verify-dev-flags.mts [base]
// 前提：调试服以 --with-sim 启动，且产物里本来就带模拟器。

import { appendFileSync, readdirSync, existsSync, readFileSync, writeFileSync } from "node:fs";
import { join } from "node:path";
import { sleep } from "../cdp.mjs";

const BASE = process.argv[2] ?? "http://127.0.0.1:5173";
const CSS = "src/styles/index.css";
const RELEASES = "dist/releases";

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

const simulatorCount = () => {
  let n = 0;
  for (const dir of readdirSync(RELEASES)) {
    if (existsSync(join(RELEASES, dir, "scripts", "wallpaper-engine.js"))) n += 1;
  }
  return n;
};

const original = readFileSync(CSS, "utf8");
try {
  console.log("=== ① 前置条件：调试服真的活着 ===");
  let alive = false;
  try {
    const res = await fetch(`${BASE}/`);
    alive = res.status === 200;
  } catch {
    alive = false;
  }
  check(alive, "调试服响应 GET /", alive ? BASE : "连不上——后面所有结论都不成立");
  if (!alive) throw new Error("调试服没起来，验证无意义");

  const before = simulatorCount();
  check(before > 0, "重建前产物里带模拟器", `${before} 个分发`);
  if (before === 0) throw new Error("产物里没有模拟器，请先 node tools/build.ts --with-sim");

  console.log("\n=== ② 保存一次源文件，等热更新重建 ===");
  appendFileSync(CSS, `\n/* dev-flags probe ${Date.now()} */\n`);
  // 用"被改的 CSS 已经能被取到新内容"作为重建完成的判据，而不是干等固定秒数。
  let rebuilt = false;
  const deadline = Date.now() + 30000;
  while (Date.now() < deadline) {
    await sleep(400);
    try {
      const text = await (await fetch(`${BASE}/release/collection-all/styles/index.css`)).text();
      if (/dev-flags probe/.test(text)) {
        rebuilt = true;
        break;
      }
    } catch {
      // 重建中偶尔取不到，继续等
    }
  }
  check(rebuilt, "重建完成（调试服已能取到新的 CSS）");

  console.log("\n=== ③ 开关是否保持 ===");
  const after = simulatorCount();
  check(after === before, "--with-sim 在热更新重建后仍然生效", `${before} → ${after}`);
} finally {
  writeFileSync(CSS, original);
  await sleep(3000);
  console.log("\n源文件已还原");
}

console.log(failures === 0 ? "构建开关保持：通过" : `构建开关保持：失败 ${failures} 处`);
process.exit(failures === 0 ? 0 : 1);