/* Generate favicon PNGs + manifest icons from favicon.svg (re-runnable).
 *
 * Usage (frontend container, Chromium already installed for screenshots):
 *   npm run icons
 *
 * Renders the SVG at each target size (crisp native rasterization) into
 * public/. apple-touch-icon keeps the solid kirchenblau background (iOS
 * fills transparency black). The 512 icon doubles as maskable: the glyph
 * stays inside the inner 80% safe zone.
 */

import { readFileSync } from "node:fs";
import { join, dirname } from "node:path";
import { fileURLToPath } from "node:url";
import { chromium } from "playwright";

const root = join(dirname(fileURLToPath(import.meta.url)), "..");
const svg = readFileSync(join(root, "public", "favicon.svg"), "utf-8");
const dataUrl = `data:image/svg+xml,${encodeURIComponent(svg)}`;

const targets = [
  ["favicon-32x32.png", 32],
  ["apple-touch-icon.png", 180],
  ["icon-192.png", 192],
  ["icon-512.png", 512],
];

const browser = await chromium.launch();
try {
  const page = await browser.newPage();
  for (const [file, size] of targets) {
    await page.setViewportSize({ width: size, height: size });
    await page.setContent(
      `<body style="margin:0"><img src="${dataUrl}" width="${size}" height="${size}"/></body>`,
    );
    await page.locator("img").screenshot({
      path: join(root, "public", file),
      omitBackground: true,
    });
    console.log(`wrote public/${file}`);
  }
} finally {
  await browser.close();
}