// Erzeugt PWA-Icons aus dem echten App-Logo (logo_v3.svg) auf hellem Grund.
// Läuft manuell: `node scripts/generate-pwa-icons.mjs`
import sharp from "sharp";
import { readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname, join } from "node:path";

const root = join(dirname(fileURLToPath(import.meta.url)), "..");
const staticDir = join(root, "static");
const BG = "#f0f5f1"; // wald-50 (wie Header-Hintergrund)

const logoSvg = readFileSync(
  join(root, "..", "cms_content", "windwiderstand", "assets", "logo_v3.svg"),
  "utf8",
);

async function makeIcon(size, logoRatio, out) {
  const logoPx = Math.round(size * logoRatio);
  const logo = await sharp(Buffer.from(logoSvg), { density: 384 })
    .resize(logoPx, logoPx, { fit: "contain", background: { r: 0, g: 0, b: 0, alpha: 0 } })
    .png()
    .toBuffer();
  const pad = Math.round((size - logoPx) / 2);
  await sharp({ create: { width: size, height: size, channels: 4, background: BG } })
    .composite([{ input: logo, top: pad, left: pad }])
    .png()
    .toFile(join(staticDir, out));
  console.log("wrote", out, `${size}px`);
}

await makeIcon(192, 0.78, "icon-192.png");
await makeIcon(512, 0.78, "icon-512.png");
await makeIcon(512, 0.6, "icon-maskable-512.png"); // mehr Rand für Maskable-Safe-Zone
await makeIcon(180, 0.78, "apple-touch-icon.png");