// Test the page's update() logic: clock, phase, angle mapping, countdown wiring.
const fs = require('node:fs');
const assert = require('node:assert/strict');
const solar = require('../src/common/solar.js');

const ux = fs.readFileSync('src/pages/index/index.ux', 'utf8');
const script = ux.match(/<script>([\s\S]*?)<\/script>/)[1];
// strip imports, provide solar as global
const body = script.replace(/import\s+solar\s+from\s+'[^']*';?/, '');
const sandbox = { solar, setInterval: () => 0, clearInterval: () => {}, Date, Math, String, Number, console };
const vm = require('node:vm');
const ctx = vm.createContext(sandbox);
sandbox.spec = vm.runInContext('(' + body.replace('export default', '') + ')', ctx);
const spec = sandbox.spec;

function mk() {
  const o = Object.assign({}, JSON.parse(JSON.stringify(spec.private || {})));
  for (const k in spec) if (k !== 'private' && k !== 'computed') o[k] = spec[k].bind(o);
  o.$element = () => null;
  spec.onInit.call(o);
  return o;
}

// midday Paris: DAY, angle between -90 and +90, countdown mentions sunset
let c = mk();
let fixedNow = new Date('2026-09-09T12:00:00Z');
const realDate = Date;
class FakeDate extends realDate {
  constructor(...args) { super(...(args.length ? args : [fixedNow])); }
  static now() { return fixedNow.getTime(); }
}
sandbox.Date = FakeDate;
c.update();
assert.match(c.clock, /^\d{2}:\d{2}$/);
assert.equal(c.isDay, true, 'Paris noon is day');
assert.ok(c.sunAngle > -90 && c.sunAngle < 90, `day angle within upper arc, got ${c.sunAngle}`);
assert.match(c.countdown, /sunset in/);

// night: angle in lower arc, countdown mentions sunrise
fixedNow = new Date('2026-09-09T22:00:00Z');
c.update();
assert.equal(c.isDay, false, 'Paris 22:00Z is night');
assert.ok(c.sunAngle < -90 || c.sunAngle > 90, `night angle in lower arc, got ${c.sunAngle}`);
assert.match(c.countdown, /sunrise in/);

console.log('PAGE LOGIC PASS (day arc, night arc, countdowns)');