#!/usr/bin/env node
/**
 * captureScreens.mjs — retakes the screenshots in `src/data/screens.mjs`.
 *
 * PLAN.md §13 phase 9, D4 / D45.
 *
 *   node scripts/captureScreens.mjs                       # every web screen
 *   node scripts/captureScreens.mjs shard-status admin-users
 *   RG_DEMO=http://localhost:3000 node scripts/captureScreens.mjs
 *
 * ---------------------------------------------------------------------------------------
 * AN AUTHORING TOOL, LIKE buildBrandAssets.mjs — NOT A CHECK
 * ---------------------------------------------------------------------------------------
 * This never runs in CI and CI never needs it: its output is committed, because the site
 * must build from a clean checkout with no game server, no database and no browser. What
 * CI runs is `checkScreens.mjs`, which only reads the files this produced.
 *
 * It exists because D4 asks for real screenshots of a real deployment, and the way real
 * screenshots rot is that the recipe for taking them lives in somebody's memory. The rig
 * is written down in PLAN.md §13; the framing — route, viewport, scroll offset, whether to
 * sign in — is written down in `screens.mjs`; and this turns the two into files.
 *
 * ---------------------------------------------------------------------------------------
 * WHY puppeteer-core AND NOT puppeteer
 * ---------------------------------------------------------------------------------------
 * `puppeteer` downloads its own Chromium — a hundred-odd megabytes fetched on every clean
 * install of a repository that needs a browser once per redesign. `puppeteer-core` drives
 * a Chrome that is already on the machine, which every machine that can look at this site
 * has. Point `RG_CHROME` at it if it is somewhere unusual.
 *
 * ---------------------------------------------------------------------------------------
 * WHY IT SIGNS IN THROUGH THE API RATHER THAN THE LOGIN FORM
 * ---------------------------------------------------------------------------------------
 * The administration screens need a session, and typing into the login form is the part of
 * a browser script most likely to break on a redesign — a moved field, a renamed button, a
 * React input that ignores synthetic typing. The session cookie is the only thing actually
 * wanted, so this asks the API for one from inside the page and lets the browser store it.
 * If that call stops returning 200 the script says so and stops, rather than quietly
 * screenshotting a login screen twelve times.
 */

import { existsSync, mkdirSync, readdirSync } from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

import sharp from 'sharp';

import { screens, screensOf, WEB } from '../src/data/screens.mjs';

const HERE = path.dirname(fileURLToPath(import.meta.url));
const OUT = path.join(HERE, '..', 'public', 'screens');

const BASE = (process.env.RG_DEMO || 'http://localhost:3000').replace(/\/+$/, '');
const USER = process.env.RG_ADMIN_USER || 'demoadmin';
const PASS = process.env.RG_ADMIN_PASS || 'DemoReview!2026';

/** Where Chrome usually is, per platform. First hit wins; `RG_CHROME` beats all of them. */
const CHROME_CANDIDATES = [
  process.env.RG_CHROME,
  'C:/Program Files/Google/Chrome/Application/chrome.exe',
  'C:/Program Files (x86)/Google/Chrome/Application/chrome.exe',
  '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome',
  '/usr/bin/google-chrome',
  '/usr/bin/chromium',
].filter(Boolean);

const wanted = process.argv.slice(2).filter((arg) => !arg.startsWith('-'));
const todo = screensOf('web').filter((shot) => wanted.length === 0 || wanted.includes(shot.id));

if (todo.length === 0) {
  const known = screens.map((shot) => shot.id).join(', ');
  console.error(`Nothing to capture. Known ids: ${known}`);
  process.exit(1);
}

const chrome = CHROME_CANDIDATES.find((candidate) => existsSync(candidate));

if (!chrome) {
  console.error(
    'No Chrome found. Set RG_CHROME to the browser executable — this script drives an\n' +
      'installed Chrome rather than downloading one (see the header).',
  );
  process.exit(1);
}

const puppeteer = (await import('puppeteer-core')).default;

mkdirSync(OUT, { recursive: true });

const browser = await puppeteer.launch({
  executablePath: chrome,
  headless: 'new',
  defaultViewport: { ...WEB.viewport, deviceScaleFactor: WEB.scale },
  // Scrollbars are the browser's furniture, not the product's, and a colour profile that
  // is not sRGB makes the palette in a screenshot disagree with the palette on the page.
  args: ['--hide-scrollbars', '--force-color-profile=srgb'],
});

/**
 * One page per privilege level rather than signing in and out around each shot: signing
 * out is the step that gets forgotten, and a public page captured with an admin session
 * shows a navigation bar the public never sees.
 */
const anon = await browser.newPage();
const admin = await browser.newPage();

await admin.goto(BASE, { waitUntil: 'domcontentloaded' });

const status = await admin.evaluate(
  async (username, password) => {
    const res = await fetch('/api/v1/auth/login', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      credentials: 'include',
      body: JSON.stringify({ username, password }),
    });
    return res.status;
  },
  USER,
  PASS,
);

if (status !== 200) {
  console.error(
    `Could not sign in as "${USER}" at ${BASE} (HTTP ${status}).\n` +
      'Seed the demo first — see PLAN.md §13 phase 9 and scripts/seedDemo.mjs.',
  );
  await browser.close();
  process.exit(1);
}

let failures = 0;

for (const shot of todo) {
  const page = shot.admin ? admin : anon;
  const url = BASE + shot.route;

  try {
    await page.goto(url, { waitUntil: 'networkidle2', timeout: 30_000 });

    if (shot.scrollY) {
      await page.evaluate((y) => window.scrollTo(0, y), shot.scrollY);
    }

    // Live pages settle after their first paint: a shard panel fills in from an event
    // stream, a list re-sorts once its data lands. A second is cheap and the difference
    // between a screenshot of the product and a screenshot of its loading state.
    await new Promise((resolve) => setTimeout(resolve, 1200));

    const png = await page.screenshot({ type: 'png' });
    const file = path.join(OUT, `${shot.id}.webp`);

    // Quality 82 is where UI text stops visibly softening; the files land near 150 KB,
    // which is what makes a page with five of them still a page and not a download.
    await sharp(png).webp({ quality: 82 }).toFile(file);

    const meta = await sharp(file).metadata();

    if (meta.width !== WEB.width || meta.height !== WEB.height) {
      console.error(
        `  ! ${shot.id}: got ${meta.width}x${meta.height}, expected ${WEB.width}x${WEB.height}`,
      );
      failures++;
      continue;
    }

    console.log(`  + ${shot.id.padEnd(18)} ${shot.route.padEnd(20)} ${meta.width}x${meta.height}`);
  } catch (err) {
    console.error(`  ! ${shot.id}: ${err.message}`);
    failures++;
  }
}

await browser.close();

// A file left behind by a screen that has since been renamed or dropped is a file the
// site still ships and nothing points at. Say so; do not delete somebody's work silently.
if (wanted.length === 0) {
  const declared = new Set(screensOf('web').map((shot) => `${shot.id}.webp`));
  const phones = new Set(screensOf('phone').map((shot) => `${shot.id}.webp`));
  const orphans = readdirSync(OUT).filter((name) => !declared.has(name) && !phones.has(name));

  if (orphans.length > 0) {
    console.log(`\nNot declared in screens.mjs, left alone: ${orphans.join(', ')}`);
  }
}

console.log(`\n${todo.length - failures} captured, ${failures} failed.`);
process.exit(failures > 0 ? 1 : 0);