/*** 作用：@ui-arch/frame 内核冒烟——信号 / 副作用 / 计算值的语义断言（纯 JS，无需 DOM；跑 npm run smoke 执行） ***/
import { computed, effect, signal } from '../dist/signal.js';

let pass = 0;
let fail = 0;

/*** 断言：失败也继续跑完，最后统一给退出码（否则第一个红就看不到后面） ***/
const ok = (label, cond) => {
  if (cond) {
    pass += 1;
    console.log(`ok - ${label}`);
    return;
  }
  fail += 1;
  console.error(`NOT OK - ${label}`);
};

// —— 1. 信号的读写与同值短路 ——
const count = signal(0);
let hits = 0;
effect(() => {
  count();
  hits += 1;
});
ok('effect 创建时立即执行一次', hits === 1);
count(1);
ok('写值后重跑', hits === 2);
count(1);
ok('写入相同值不触发（Object.is 短路）', hits === 2);

// —— 2. 注销后不再重跑 ——
const live = signal('a');
let liveHits = 0;
const dispose = effect(() => {
  live();
  liveHits += 1;
});
live('b');
ok('注销前正常重跑', liveHits === 2);
dispose();
live('c');
ok('注销后写值不再重跑（dispose 必须真的摘订阅）', liveHits === 2);

// —— 3. 条件分支重追踪：上一轮读过、这一轮不读的信号不该再唤它 ——
const flag = signal(true);
const left = signal(0);
const right = signal(0);
let branchHits = 0;
effect(() => {
  branchHits += 1;
  if (flag()) left();
  else right();
});
const afterInit = branchHits;
flag(false);
ok('切分支本身触发一次重跑', branchHits === afterInit + 1);
const afterSwitch = branchHits;
left(9);
ok('切走后旧的依赖不再唤它（重追踪要清旧订阅）', branchHits === afterSwitch);
right(9);
ok('切走后新依赖仍唤它', branchHits === afterSwitch + 1);

// —— 4. computed：派生、链式、同值短路 ——
const price = signal(10);
const qty = signal(2);
const total = computed(() => price() * qty());
ok('computed 首次读即得派生值', total() === 20);
price(3);
ok('源变化后 computed 立即跟着变', total() === 6);
let derivedHits = 0;
effect(() => {
  total();
  derivedHits += 1;
});
const derivedBase = derivedHits;
qty(3);
ok('computed 变更会唤上层 effect（链式依赖成立）', derivedHits === derivedBase + 1);
ok('链式计算值正确', total() === 9);

// —— 5. 多订阅者：扇出与互不影响 ——
const fan = signal(0);
let a = 0;
let b = 0;
const disposeA = effect(() => {
  fan();
  a += 1;
});
effect(() => {
  fan();
  b += 1;
});
fan(1);
ok('一次写值唤全部订阅者', a === 2 && b === 2);
disposeA();
fan(2);
ok('注销一个订阅者不影响另一个', a === 2 && b === 3);

console.log(`\n${fail === 0 ? 'SMOKE OK' : 'SMOKE FAILED'}（${pass} 通过 / ${fail} 失败）`);
process.exit(fail === 0 ? 0 : 1);