#!/usr/bin/env node
/**
 * useLiveRefetch（挂起/补刷/合并）+ 应用单例（URL 拼装、登出停流）的执行级验证。
 * 用法：cd frontend && node scripts/verify-live-refetch.mjs
 *
 * 量具：esbuild 把真 TS + 真 vue 打成一个临时 bundle（vue 必须**打进同一份**，
 * 否则脚本里的 ref 与 bundle 里的 watch 分属两个 vue 实例、依赖收集是断的）。
 */
import { build } from "esbuild";
import assert from "node:assert/strict";
import path from "node:path";
import { fileURLToPath, pathToFileURL } from "node:url";
import fs from "node:fs/promises";
import os from "node:os";

const here = path.dirname(fileURLToPath(import.meta.url));
const root = path.resolve(here, "..");
const modulePath = path.join(root, "src/composables/useLiveRefetch.ts").replaceAll("\\", "/");
// 单例（orderStream / stopOrderStream）按 Interfaces 住在 orderStreamInstance.ts —— 它不在
// useLiveRefetch.ts 的导出里，所以要显式再导一份进 bundle。
const instancePath = path.join(root, "src/utils/orderStreamInstance.ts").replaceAll("\\", "/");

// Auth 链会读 localStorage/sessionStorage：装壳（模块 import 期不读，保险起见先装）
const makeStore = () => {
  const map = new Map();
  return {
    getItem: k => (map.has(k) ? map.get(k) : null),
    setItem: (k, v) => map.set(k, String(v)),
    removeItem: k => map.delete(k),
    clear: () => map.clear()
  };
};
const localStore = makeStore();
globalThis.localStorage = localStore;
globalThis.sessionStorage = makeStore();

// 单例那条腿要用真 `new EventSource(...)`：换成假件，把 URL 抓下来
const eventSources = [];
globalThis.EventSource = class {
  constructor(url) {
    this.url = url;
    this.closed = false;
    this.listeners = new Map();
    eventSources.push(this);
  }
  addEventListener(type, fn) {
    if (!this.listeners.has(type)) this.listeners.set(type, []);
    this.listeners.get(type).push(fn);
  }
  close() {
    this.closed = true;
  }
};

const tmp = await fs.mkdtemp(path.join(os.tmpdir(), "verify-live-refetch-"));
const bundle = path.join(tmp, "bundle.mjs");

await build({
  stdin: {
    contents: `
      export * from ${JSON.stringify(modulePath)};
      export * from ${JSON.stringify(instancePath)};
      export { ref, nextTick } from "vue";
    `,
    resolveDir: root, // 从 frontend/ 解析：vue 与 "@/..." 都从这里走
    sourcefile: "verify-entry.mjs",
    loader: "js"
  },
  outfile: bundle,
  bundle: true,
  format: "esm",
  platform: "neutral",
  target: "node22",
  logLevel: "error",
  alias: { "@": path.join(root, "src") },
  define: {
    "import.meta.env.VITE_APP_BASE_API": JSON.stringify("/api/v1"),
    __VUE_OPTIONS_API__: "false",
    __VUE_PROD_DEVTOOLS__: "false",
    __VUE_PROD_HYDRATION_MISMATCH_DETAILS__: "false"
  }
});

const { useLiveRefetch, orderStream, stopOrderStream, ref, nextTick } = await import(pathToFileURL(bundle).href);

const sleep = ms => new Promise(r => setTimeout(r, ms));

function fakeStream() {
  const subs = new Map();
  const resyncs = new Set();
  let unsubscribed = 0;
  return {
    subscribe(channel, fn) {
      if (!subs.has(channel)) subs.set(channel, new Set());
      subs.get(channel).add(fn);
      return () => {
        subs.get(channel)?.delete(fn);
        unsubscribed += 1;
      };
    },
    onResync(fn) {
      resyncs.add(fn);
      return () => resyncs.delete(fn);
    },
    stop() {},
    isRunning: () => true,
    emit(channel) {
      for (const fn of subs.get(channel) || []) fn();
    },
    fireResync() {
      for (const fn of resyncs) fn();
    },
    get channels() {
      return [...subs.keys()].sort();
    },
    get unsubscribed() {
      return unsubscribed;
    }
  };
}

let failed = 0;
async function check(name, fn) {
  try {
    await fn();
    console.log("  PASS  " + name);
  } catch (e) {
    failed += 1;
    console.error("  FAIL  " + name + "\n        " + (e && e.message));
  }
}

const OPTS = { debounceMs: 5 };

await check("订阅给定的三个通道", async () => {
  const stream = fakeStream();
  let calls = 0;
  const dispose = useLiveRefetch(["lsy_order", "lsy_refund", "har_order"], () => { calls += 1; }, { ...OPTS, stream });

  assert.deepEqual(stream.channels, ["har_order", "lsy_order", "lsy_refund"]);
  dispose();
});

await check("本通道的帧 → 合并窗口后刷一次；别的通道不触发", async () => {
  const stream = fakeStream();
  let calls = 0;
  const dispose = useLiveRefetch(["lsy_order"], () => { calls += 1; }, { ...OPTS, stream });

  stream.emit("lsy_refund");
  await sleep(20);
  assert.equal(calls, 0, "没订阅的通道不许刷");

  stream.emit("lsy_order");
  assert.equal(calls, 0, "合并窗口内不许同步刷（同一次写入会来好几帧）");
  await sleep(20);
  assert.equal(calls, 1);

  dispose();
});

await check("窗口内多帧（含重连补拉）只刷一次", async () => {
  const stream = fakeStream();
  let calls = 0;
  const dispose = useLiveRefetch(["lsy_order"], () => { calls += 1; }, { ...OPTS, stream });

  stream.emit("lsy_order");
  stream.emit("lsy_order");
  stream.fireResync();
  await sleep(20);

  assert.equal(calls, 1, "一次写入的多帧 + 一次重连补拉，合并成一次重拉");
  dispose();
});

await check("busy 期间挂起，回安全态立刻补刷一次", async () => {
  const stream = fakeStream();
  const busy = ref(false);
  let calls = 0;
  const dispose = useLiveRefetch(["lsy_order"], () => { calls += 1; }, { ...OPTS, stream, busy });

  busy.value = true;
  await nextTick();

  stream.emit("lsy_order");
  stream.emit("lsy_order");
  await sleep(20);
  assert.equal(calls, 0, "用户正在勾选/弹窗里操作，列表不许在脚下跳");

  busy.value = false;
  await nextTick();
  assert.equal(calls, 1, "回到安全态立刻补刷（不等下一个信号）");

  await sleep(20);
  assert.equal(calls, 1, "补刷只做一次（pending 要清掉）");

  // 补刷把 pending 消费掉之后，下一轮 busy 翻转（期间**没有**新信号）不许再刷一次。
  // 没有这一段的话，「pending 永远不清」与「pending 用完即清」两种实现读数完全相同。
  busy.value = true;
  await nextTick();
  busy.value = false;
  await nextTick();
  await sleep(20);
  assert.equal(calls, 1, "上一轮的 pending 已被消费：这一轮没有信号，一次都不该刷");
  dispose();
});

await check("busy 翻转但期间没有信号 → 一次都不刷", async () => {
  const stream = fakeStream();
  const busy = ref(false);
  let calls = 0;
  const dispose = useLiveRefetch(["lsy_order"], () => { calls += 1; }, { ...OPTS, stream, busy });

  busy.value = true;
  await nextTick();
  busy.value = false;
  await nextTick();
  await sleep(20);

  assert.equal(calls, 0, "没漏东西就白拉一次 = 每次关弹窗都打一次接口");
  dispose();
});

await check("busy 期间的重连补拉也挂起", async () => {
  const stream = fakeStream();
  const busy = ref(true);
  let calls = 0;
  const dispose = useLiveRefetch(["lsy_order"], () => { calls += 1; }, { ...OPTS, stream, busy });
  await nextTick();

  stream.fireResync();
  await sleep(20);
  assert.equal(calls, 0);

  busy.value = false;
  await nextTick();
  assert.equal(calls, 1);
  dispose();
});

await check("refetch 抛错 / reject 都不冒泡，后续帧仍能刷", async () => {
  const stream = fakeStream();
  let calls = 0;
  const dispose = useLiveRefetch(
    ["lsy_order"],
    () => {
      calls += 1;
      if (calls === 1) throw new Error("同步炸");
      if (calls === 2) return Promise.reject(new Error("异步炸"));
      return Promise.resolve();
    },
    { ...OPTS, stream }
  );

  stream.emit("lsy_order");
  await sleep(20);
  stream.emit("lsy_order");
  await sleep(20);
  stream.emit("lsy_order");
  await sleep(20);

  assert.equal(calls, 3, "三次都该真的调下去（异常被吞掉，不影响下一次）");
  dispose();
});

await check("dispose：退订全部通道、清掉未到期的合并、不再刷", async () => {
  const stream = fakeStream();
  let calls = 0;
  const dispose = useLiveRefetch(["lsy_order", "lsy_refund"], () => { calls += 1; }, { ...OPTS, stream });

  stream.emit("lsy_order");
  dispose();
  assert.equal(stream.unsubscribed, 2, "两个通道都要退订");

  await sleep(20);
  assert.equal(calls, 0, "dispose 时未到期的合并必须被清掉（页面已经卸载了）");

  stream.emit("lsy_order");
  await sleep(20);
  assert.equal(calls, 0);
});

await check("单例：URL 现取令牌拼装 + 登出停流", async () => {
  // Storage.get 会 JSON.parse，所以按 Storage.set 的写法存（带引号的 JSON 串）
  localStore.setItem("remember_me", "true");
  localStore.setItem("access_token", JSON.stringify("tok-123"));

  assert.equal(orderStream(), orderStream(), "必须是同一个实例");

  const off = orderStream().subscribe("lsy_order", () => {});
  assert.equal(eventSources.length, 1);
  assert.equal(eventSources[0].url, "/api/v1/payment/stream/orders?token=tok-123");

  stopOrderStream();
  assert.equal(eventSources[0].closed, true, "登出停流必须真的关连接（token 已清，重连只会被 403 挡回）");

  off();
});

console.log(failed === 0 ? "\n全部通过" : `\n${failed} 条失败`);
if (failed > 0) process.exit(1);