// What the end-to-end tests import is declared: a package found only as the
// dependency of another (as @noble/hashes under polkadot-api) may vanish with it.
import { readdirSync, readFileSync } from 'node:fs';
import { builtinModules } from 'node:module';
import { join } from 'node:path';
import { describe, expect, it } from 'vitest';

const root = join(__dirname, '../..');
const pkg = JSON.parse(readFileSync(join(root, 'package.json'), 'utf8')) as {
  dependencies?: Record<string, string>;
  devDependencies?: Record<string, string>;
};
const declared = new Set([...Object.keys(pkg.dependencies ?? {}), ...Object.keys(pkg.devDependencies ?? {})]);

/** `@scope/name/sub.js` → `@scope/name`; `name/sub` → `name`. */
const packageOf = (spec: string) => spec.split('/').slice(0, spec.startsWith('@') ? 2 : 1).join('/');

describe('the end-to-end tests', () => {
  it('import only declared packages', () => {
    const dir = join(root, 'e2e');
    for (const file of readdirSync(dir).filter((f) => /\.(mjs|ts)$/.test(f))) {
      const text = readFileSync(join(dir, file), 'utf8');
      for (const [, spec] of text.matchAll(/^import[^'"]*['"]([^'"]+)['"]/gm)) {
        if (!spec || spec.startsWith('.') || spec.startsWith('node:') || builtinModules.includes(spec)) continue;
        expect(declared.has(packageOf(spec)), `${file}: ${spec}`).toBe(true);
      }
    }
  });
});