// SPDX-FileCopyrightText: 2026 Milovann Yanatchkov
// SPDX-License-Identifier: MIT

// cdn-to-bare.mjs — esbuild onResolve plugin.
// Rewrites three.js CDN URL imports to bare specifiers at bundle time, so the
// bimr-web bundle is resolved by the import map in index.html at runtime.
// Source keeps absolute CDN URLs (required by the standalone viewer repo).

const THREE_VERSION = "0.177.0";
const THREE_CDN = `https://cdn.jsdelivr.net/npm/three@${THREE_VERSION}`;
const THREE_CORE = `${THREE_CDN}/build/three.module.js`;
const THREE_ADDONS = `${THREE_CDN}/examples/jsm/`;

export const cdnToBare = {
  name: "cdn-to-bare",
  setup(build) {
    build.onResolve({ filter: new RegExp(`^${THREE_CDN.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}`) }, (args) => {
      if (args.path === THREE_CORE) {
        return { path: "three", external: true };
      }
      if (args.path.startsWith(THREE_ADDONS)) {
        return { path: `three/addons/${args.path.slice(THREE_ADDONS.length)}`, external: true };
      }
      return { path: args.path, external: true };
    });
  },
};