/**
 * Rewrites `import.meta` so Babel can compile Vite source to CommonJS for Jest.
 *
 * `import.meta` is only legal inside a real ES module; babel-jest compiles to
 * CJS, so every file that reads `import.meta.env` (api/doormile/client.js,
 * lib/distance.js) is a hard parse error without this.
 *
 * It resolves to `globalThis.__VITE_IMPORT_META__` — a plain object the test
 * setup seeds and individual tests can override, which is the seam that lets a
 * test exercise `VITE_DOORMILE_URL` / `VITE_OSRM_URL` overrides at all.
 */
module.exports = function importMetaPlugin({ types: t }) {
  return {
    name: 'transform-import-meta-for-jest',
    visitor: {
      MetaProperty(path) {
        if (path.node.meta.name !== 'import' || path.node.property.name !== 'meta') return;
        path.replaceWith(
          t.logicalExpression(
            '||',
            t.memberExpression(t.identifier('globalThis'), t.identifier('__VITE_IMPORT_META__')),
            t.objectExpression([t.objectProperty(t.identifier('env'), t.objectExpression([]))])
          )
        );
      },
    },
  };
};