#!/usr/bin/env node
/**
 * qa-anime-sky — the anime style must leave the sky without bands.
 *
 * Anime's luminance bands turn the faint Milky Way into blotches, so
 * src/ui/visualEffects.js fades the glow out with the style. Headless against
 * a Vite dev server, the real anime style looks away from the Earth at the
 * Galactic Centre: at most 0.5 % of the sky (the stars) may reach the first
 * band.
 *
 * Usage: node scripts/qa-anime-sky.mjs [--url http://localhost:4333/]
 * Exit: 0 pass, 1 fail, 2 the anime style was not reached.
 */
import puppeteer from 'puppeteer';

const i = process.argv.indexOf('--url');
const URL_ =
  i > 0 && process.argv[i + 1] ? process.argv[i + 1] : 'http://localhost:4333/';

const browser = await puppeteer.launch({
  headless: 'new',
  args: ['--no-sandbox', '--ignore-gpu-blocklist'],
});
try {
  const page = await browser.newPage();
  page.on('pageerror', (e) => console.log('PAGEERR', String(e).slice(0, 300)));
  await page.setViewport({ width: 1000, height: 700 });
  await page.evaluateOnNewDocument(() =>
    localStorage.setItem('gev:first-run-mission:v1', 'suppressed'),
  );
  await page.goto(URL_, { waitUntil: 'domcontentloaded' });
  await page.waitForFunction(() => window.__godsEyeView?.viewer?.scene, {
    timeout: 120000,
  });
  await new Promise((r) => setTimeout(r, 12000));
  const r = await page.evaluate(async () => {
    const entry = performance
      .getEntriesByType('resource')
      .map((e) => e.name)
      .find((n) => /\.vite\/deps\/cesium\.js/.test(n));
    if (!entry)
      throw new Error(
        'run against the Vite dev server (needs .vite/deps/cesium.js)',
      );
    const C = await import(entry),
      g = window.__godsEyeView,
      v = g.viewer,
      s = v.scene;
    g.styleManager.setStyle('anime', { userInitiated: true });
    const t = v.clock.currentTime;
    await C.Transforms.preloadIcrfFixed(
      new C.TimeInterval({
        start: C.JulianDate.addDays(t, -1, new C.JulianDate()),
        stop: C.JulianDate.addDays(t, 1, new C.JulianDate()),
      }),
    );
    const m = C.Transforms.computeIcrfToFixedMatrix(t);
    const ra = C.Math.toRadians(266.4),
      dec = C.Math.toRadians(-29);
    const look = C.Matrix3.multiplyByVector(
      m,
      new C.Cartesian3(
        Math.cos(dec) * Math.cos(ra),
        Math.cos(dec) * Math.sin(ra),
        Math.sin(dec),
      ),
      new C.Cartesian3(),
    );
    const north = C.Matrix3.multiplyByVector(
      m,
      C.Cartesian3.UNIT_Z,
      new C.Cartesian3(),
    );
    const right = C.Cartesian3.normalize(
      C.Cartesian3.cross(look, north, new C.Cartesian3()),
      new C.Cartesian3(),
    );
    s.camera.cancelFlight();
    s.camera.setView({
      destination: C.Cartesian3.multiplyByScalar(look, 3e7, new C.Cartesian3()),
      orientation: {
        direction: look,
        up: C.Cartesian3.cross(right, look, new C.Cartesian3()),
      },
    });
    await new Promise((res) => setTimeout(res, 2500));
    s.requestRender();
    s.render();
    const gl = s.context._gl,
      w = gl.drawingBufferWidth,
      h = gl.drawingBufferHeight,
      px = new Uint8Array(w * h * 4);
    gl.readPixels(0, 0, w, h, gl.RGBA, gl.UNSIGNED_BYTE, px);
    let banded = 0;
    for (let i = 0; i < px.length; i += 4)
      if (0.299 * px[i] + 0.587 * px[i + 1] + 0.114 * px[i + 2] >= 51) banded++;
    let animeOn = false;
    for (let i = 0; i < s.postProcessStages.length; i++) {
      const stage = s.postProcessStages.get(i);
      if (stage.name === 'godsEyeView_anime')
        animeOn = stage.enabled && stage.uniforms.intensity > 0.99;
    }
    return {
      total: px.length / 4,
      banded,
      visibility: s.skyBox.milkyWayVisibility,
      animeOn,
    };
  });
  const tag = !r.animeOn
    ? 'UNREACHED'
    : r.banded <= 0.005 * r.total
      ? 'PASS'
      : 'FAIL';
  console.log(
    `${tag}: ${r.banded} of ${r.total} sky pixels at or above the first cel band (luma >= 0.2)\n     ${JSON.stringify(r)}`,
  );
  process.exitCode = tag === 'PASS' ? 0 : tag === 'FAIL' ? 1 : 2;
} finally {
  await browser.close();
}