// Lädt die fünf Poly-Haven-Requisiten in 1k (gltf + zugehörige Texturen/`.bin`) nach
// public/models/props/raw/ und vereinfacht sie danach mit @gltf-transform/cli zu je einer
// kompakten .glb unter public/models/props/. Gleiches Muster wie textures.mjs, aber Modelle
// stehen unter dem Schlüssel "gltf" statt unter den Map-Namen ("Diffuse", "nor_gl", "arm"),
// und die 1k-Auflösung liefert neben der .gltf-Datei selbst noch eine `include`-Liste mit den
// referenzierten Texturen und der gemeinsamen `.bin`-Geometriedatei — ohne die kann
// gltf-transform die .gltf-Datei nicht öffnen.
import { execFileSync } from "node:child_process";
import { mkdir, writeFile } from "node:fs/promises";
import { dirname, join } from "node:path";

const UA = { "User-Agent": "leonida-assets/0.1 (local hobby project)" };
const SLUGS = ["street_lamp_02", "painted_wooden_bench", "metal_trash_can", "fire_hydrant", "concrete_road_barrier_02"];
const RAW_DIR = "public/models/props/raw";
const OUT_DIR = "public/models/props";

async function fetchTo(url, path) {
    const buf = Buffer.from(await (await fetch(url, { headers: UA })).arrayBuffer());
    await mkdir(dirname(path), { recursive: true });
    await writeFile(path, buf);
    return buf.length;
}

await mkdir(OUT_DIR, { recursive: true });
for (const slug of SLUGS) {
    const files = await (await fetch(`https://api.polyhaven.com/files/${slug}`, { headers: UA })).json();
    const entry = files.gltf?.["1k"]?.gltf;
    if (!entry) { console.warn(`${slug}: keine 1k-gltf-Datei gefunden`); continue; }

    const gltfPath = join(RAW_DIR, slug, `${slug}_1k.gltf`);
    const gltfSize = await fetchTo(entry.url, gltfPath);
    console.log(`${slug}_1k.gltf ${(gltfSize / 1e6).toFixed(2)} MB`);
    for (const [relPath, include] of Object.entries(entry.include ?? {})) {
        const size = await fetchTo(include.url, join(RAW_DIR, slug, relPath));
        console.log(`  ${relPath} ${(size / 1e6).toFixed(2)} MB`);
    }

    const outPath = join(OUT_DIR, `${slug}.glb`);
    execFileSync("npx", ["--yes", "@gltf-transform/cli@4.5.0", "optimize", gltfPath, outPath,
        "--texture-size", "512", "--simplify-error", "0.01", "--compress", "meshopt"], { stdio: "inherit" });
}