// 用最小 DOM 桩把「跳转动画」这条链路真的跑一遍：主进程下发参数 → 呈现时间层 → 数字 / 表盘
//   node test/renderer-clock-anim.dom-test.js
// 桩终究不是真浏览器：它能证明「缓动从哪里出发、落在哪里、被打断时连不连续」，
// 证明不了「滚起来顺不顺眼」——那部分只能在 Windows 上肉眼确认。

const fs = require('fs');
const path = require('path');
const vm = require('vm');
const root = path.join(__dirname, '..');
const read = (p) => fs.readFileSync(path.join(root, p), 'utf8');

let passed = 0; const failures = [];
const check = (n, ok, d) => { if (ok) { passed++; console.log(`PASS  ${n}${d ? `  [${d}]` : ''}`); } else { failures.push(n); console.log(`FAIL  ${n}${d ? `  [${d}]` : ''}`); } };

function makeEl(id) {
  return {
    id, textContent: '', hidden: false, style: {}, dataset: {}, children: [], attrs: {}, handlers: {},
    classList: { add() {}, remove() {}, toggle() {}, contains: () => false },
    appendChild(c) { this.children.push(c); },
    setAttribute(k, v) { this.attrs[k] = v; },
    getAttribute(k) { return this.attrs[k]; },
    getBoundingClientRect: () => ({ width: 520, height: 280, top: 0, left: 0 }),
    addEventListener(type, fn) { (this.handlers[type] ||= []).push(fn); },
    setPointerCapture() {}, releasePointerCapture() {}
  };
}

const els = new Map();
const byId = (id) => { if (!els.has(id)) els.set(id, makeEl(id)); return els.get(id); };
const body = makeEl('body');

const RealDate = Date;
const T0 = new RealDate(2026, 8, 14, 3, 0, 0, 0).getTime(); // 03:00:00.000
const MIN = 60 * 1000;
let fakeNow = T0;

class FakeDate extends RealDate {
  constructor(...a) { if (a.length === 0) super(fakeNow); else super(...a); }
  static now() { return fakeNow; }
}

// 主进程下发的参数就是这个形状；这里照原样造
const snap = (baseMs, baseRealMs, rate, style = 'digital') => ({
  baseMs, baseRealMs, rate, lastRate: rate, style, paused: rate === 0,
  clockWindowOpen: true, alwaysOnTop: { clock: true, control: false }
});

let rafCb = null;
let stateCb = null;

const sandbox = {
  console,
  Date: FakeDate,
  requestAnimationFrame: (cb) => { rafCb = cb; return 1; },
  ResizeObserver: class { observe() {} },
  getComputedStyle: () => ({}),
  addEventListener: () => {},
  document: {
    body,
    getElementById: byId,
    querySelectorAll: () => [],
    createElementNS: () => makeEl('svg-node')
  },
  window: {}
};
sandbox.window = sandbox;
sandbox.window.clockApi = {
  getState: () => Promise.resolve(snap(T0, T0, 1)),
  onState: (cb) => { stateCb = cb; },
  setRate: () => Promise.resolve({}), fastForward: () => Promise.resolve({}),
  setTime: () => Promise.resolve({}), setStyle: () => Promise.resolve({}),
  togglePause: () => Promise.resolve({}), setAlwaysOnTop: () => Promise.resolve({}),
  toggleClockWindow: () => Promise.resolve({}), closeClockWindow: () => Promise.resolve({}),
  closeControlWindow: () => Promise.resolve({}), getBoundsSync: () => null, setBounds: () => {}
};

const ctx = vm.createContext(sandbox);
try {
  for (const file of ['renderer/resize.js', 'renderer/presented-time.js', 'renderer/clock.js']) {
    vm.runInContext(read(file), ctx, { filename: file });
  }
  check('渲染进程脚本加载无异常', true);
} catch (e) {
  check('渲染进程脚本加载无异常', false, e.message);
  console.log('\n致命：渲染进程脚本无法加载'); process.exit(1);
}

// —— 读数小工具 ——
const frame = () => rafCb();                                  // 渲染一帧（真实时间就是 fakeNow）
const advance = (ms) => { fakeNow += ms; rafCb(); };
const shown = () => Number(body.dataset.displayMs);
const text = () => byId('digitalTime').textContent;
const rot = (el) => Number(/rotate\(([-\d.eE]+)/.exec(el.attrs.transform)[1]);
const targetOf = (s, now) => s.baseMs + (now - s.baseRealMs) * s.rate;

// 与 clock.js 同一套角度公式：秒针按毫秒连续走
function anglesFor(ms) {
  const d = new RealDate(ms);
  const seconds = d.getSeconds() + d.getMilliseconds() / 1000;
  const minutes = d.getMinutes() + seconds / 60;
  const hours = (d.getHours() % 12) + minutes / 60;
  return { hour: hours * 30, minute: minutes * 6, second: seconds * 6 };
}

// 三根指针是否都严格由「当前呈现时间」推出来（差 0.05° 以内 ≈ 0.1ms 的误差）
function handsMatchPresented() {
  const expect = anglesFor(shown());
  return Math.abs(rot(byId('hourHand')) - expect.hour) < 0.05 &&
    Math.abs(rot(byId('minuteHand')) - expect.minute) < 0.05 &&
    Math.abs(rot(byId('secondHand')) - expect.second) < 0.05;
}

setTimeout(() => {
  console.log('--- 平时不动画 ---');
  frame();
  check('初始显示 03:00:00', text() === '03:00:00', text());
  advance(1000);
  check('走 1 秒就是 1 秒（动画层不拖后腿）', text() === '03:00:01', text());

  console.log('--- 快进 +30 分钟：数字滚过去 ---');
  const before = shown();
  stateCb(snap(before + 30 * MIN, fakeNow, 1)); // 主进程 shift：以此刻的显示时间为准整体平移
  frame();
  check('跳变当帧数字还在旧值上（从这里开始滚）',
    shown() === before && text() === '03:00:01', `${text()} / ${shown() - before}`);
  advance(175);
  const mid = shown();
  check('半程时数字落在两者之间', mid > before && mid < before + 30 * MIN, `${Math.round(mid - before)}ms`);
  check('半程时数字确实换过（不是干等）', text() !== '03:00:01' && text() !== '03:30:01', text());
  advance(175);
  check('350ms 后落在 +30 分钟那一刻', shown() === before + 30 * MIN + 350,
    `${shown() - (before + 30 * MIN + 350)}ms`);
  check('落地后显示 03:30:01', text() === '03:30:01', text());

  console.log('--- 小跳变直接跳 ---');
  const smallBase = shown();
  stateCb(snap(smallBase + 1000, fakeNow, 1));
  frame();
  check('+1 秒：当帧就直接到新值，不缓动', shown() === smallBase + 1000, `${shown() - smallBase}ms`);

  console.log('--- 改倍率不是跳变 ---');
  const rateBase = shown();
  stateCb(snap(rateBase, fakeNow, 60));
  frame();
  check('切 ×60：当帧显示时间不变（没有动画）', shown() === rateBase, `${shown() - rateBase}ms`);
  advance(100);
  check('切 ×60：之后立刻按新倍率走', shown() === rateBase + 6000, `${shown() - rateBase}ms`);

  console.log('--- 表盘：指针从同一个呈现时间扫过去 ---');
  const T11 = new RealDate(2026, 8, 14, 11, 0, 0, 0).getTime();
  const digitalBefore = shown();
  stateCb(snap(T11, fakeNow, 1, 'analog'));
  frame();
  check('切表盘 + 跳变当帧：指针仍指在旧时间上', Math.abs(rot(byId('hourHand')) - anglesFor(digitalBefore).hour) < 0.05,
    `${rot(byId('hourHand'))}° vs 目标 ${anglesFor(T11).hour}°`);
  check('当帧还没到 11 点', Math.abs(rot(byId('hourHand')) - 330) > 1, `${rot(byId('hourHand'))}°`);
  advance(175);
  check('半程时三根指针都由当前呈现时间推出', handsMatchPresented(),
    `时针 ${rot(byId('hourHand')).toFixed(2)}°`);
  advance(175);
  check('落地后时针指向 11 点整（330°）', Math.abs(rot(byId('hourHand')) - 330) < 0.05, `${rot(byId('hourHand'))}°`);
  check('落地后三根指针依然与呈现时间一致', handsMatchPresented());

  console.log('--- 跨 12 点：往前扫，不倒着转一圈 ---');
  // 11:00 → 次日 01:00（跨过 12 点），缓动过程中时间必须单调向前
  const T01 = new RealDate(2026, 8, 15, 1, 0, 0, 0).getTime();
  stateCb(snap(T01, fakeNow, 1, 'analog'));
  const samples = [];
  let handsAligned = true;
  for (let i = 0; i <= 7; i += 1) {
    if (i > 0) fakeNow += 50;
    rafCb();
    samples.push(shown());
    if (!handsMatchPresented()) handsAligned = false;
  }
  check('缓动全程三根指针都由当前呈现时间推出（含跨 12 点那几帧）', handsAligned);
  let monotonic = true;
  for (let i = 1; i < samples.length; i++) if (samples[i] <= samples[i - 1]) monotonic = false;
  check('缓动全程呈现时间单调向前（角度按公式跟随，所以不会倒着转一圈）', monotonic,
    `${samples[0]} → ${samples[samples.length - 1]}`);
  advance(350);
  check('跨 12 点后落在次日 01:00', Math.abs(rot(byId('hourHand')) % 360 - 30) < 1, `${rot(byId('hourHand'))}°`);

  console.log('--- 缓动中又跳一次：从当前呈现值重新出发 ---');
  stateCb(snap(shown() + 30 * MIN, fakeNow, 1, 'digital'));
  advance(100);
  const midFlight = shown();
  const retargetTo = shown() + MIN; // 主进程在模型目标上再 +1 分钟
  stateCb(snap(retargetTo, fakeNow, 1, 'digital'));
  frame();
  check('重定向当帧不弹回跳变前的旧值', shown() === midFlight, `${shown() - midFlight}ms`);
  advance(350);
  check('重定向后落在新目标上', shown() === targetOf(snap(retargetTo, fakeNow - 350, 1), fakeNow),
    `${shown()} vs ${targetOf(snap(retargetTo, fakeNow - 350, 1), fakeNow)}`);

  console.log('--- 暂停不缓动 ---');
  const pausedAt = shown();
  stateCb(snap(pausedAt, fakeNow, 0));
  frame();
  check('暂停当帧就是暂停时刻的准确时间', shown() === pausedAt, `${shown() - pausedAt}ms`);
  advance(5000);
  check('暂停后画面纹丝不动', shown() === pausedAt, `${shown() - pausedAt}ms`);

  // 缓动没结束时按暂停：不能挂着走不完的中间值
  stateCb(snap(pausedAt + 30 * MIN, fakeNow, 1));
  advance(100);
  const inFlight = shown();
  check('恢复后先正常滚起来', inFlight > pausedAt && inFlight < pausedAt + 30 * MIN, `${Math.round(inFlight - pausedAt)}ms`);
  stateCb(snap(pausedAt + 30 * MIN, fakeNow, 0));
  frame();
  check('缓动中按暂停：立刻落到暂停时刻的准确值', shown() === pausedAt + 30 * MIN, `${shown() - (pausedAt + 30 * MIN)}ms`);
  advance(5000);
  check('暂停后继续保持该值', shown() === pausedAt + 30 * MIN);

  console.log('');
  if (!failures.length) { console.log(`跳转动画链路：全部通过 ${passed}/${passed}`); process.exit(0); }
  console.log(`通过 ${passed}，失败 ${failures.length}：${failures.join('；')}`); process.exit(1);
}, 30);