// Bundle src/frost.ts (+ three@0.185.1 WebGPU/TSL, three-mesh-bvh) into one
// classic IIFE at assets/frost.js exposing `window.Frost`. Run `npm install && npm run build` after editing src/.
import "./tools/compile-preflight.mjs";
if (process.exitCode) process.exit(process.exitCode);
// CPU-only shader generation checks the portable interface budget, including motion vectors.
await import("./tools/run-shard-compile.mjs");
if (process.exitCode) process.exit(process.exitCode);
import { build } from "esbuild";
import { createRequire } from "node:module";
import { statSync } from "node:fs";

const require = createRequire(import.meta.url);
// The addons (SVGLoader, BufferGeometryUtils, GLTFLoader, three-mesh-bvh) import the classic `three` build; the
// app uses `three/webgpu`, which re-exports the core. Point the bare specifier at the WebGPU build so exactly one
// Three instance exists in the bundle (same alias as the experiment's vite.config.ts).
const threeWebgpu = require.resolve("three/webgpu");
const threeAlias = {
  name: "three-webgpu-alias",
  setup(b) {
    b.onResolve({ filter: /^three$/ }, () => ({ path: threeWebgpu }));
  },
};

await build({
  entryPoints: ["src/frost.ts"],
  bundle: true,
  format: "iife",
  globalName: "Frost",
  minify: true,
  sourcemap: false,
  target: ["es2022"],
  outfile: "assets/frost.js",
  plugins: [threeAlias],
  legalComments: "linked",
  logLevel: "info",
  banner: {
    js: "/* Frost: three@0.185.1 (MIT) + three-mesh-bvh@0.9.14 (MIT). Generated by build.mjs; edit src/ and rebuild. */",
  },
});
console.log(`assets/frost.js ${(statSync("assets/frost.js").size / 1024).toFixed(0)} KB`);

// Lightweight workspace uses classic WebGL only; math/geometry helpers share their source
// with the full WebGPU block without importing its renderer or simulation.
await build({
  entryPoints: ["src/motion/editor.ts"],
  bundle: true,
  format: "iife",
  minify: true,
  target: ["es2022"],
  outfile: "assets/motion.js",
  legalComments: "linked",
  logLevel: "info",
  plugins: [
    {
      name: "motion-three",
      setup(b) {
        b.onResolve({ filter: /^three\/webgpu$/ }, () => ({
          path: require.resolve("three").replace("three.cjs", "three.module.js"),
        }));
      },
    },
  ],
});