// Guards the one architectural rule that the type system cannot express:
// assets/scripts/core must never import the Cocos engine. See docs/TECHNICAL.md.
import { readdirSync, readFileSync, statSync } from 'node:fs';
import { join } from 'node:path';

const ROOT = 'assets/scripts/core';
const FORBIDDEN = /from\s+['"](cc|cc\/env|db:\/\/)/;
const offenders = [];

function walk(dir) {
    for (const entry of readdirSync(dir)) {
        const p = join(dir, entry);
        if (statSync(p).isDirectory()) walk(p);
        else if (p.endsWith('.ts')) {
            const src = readFileSync(p, 'utf8');
            src.split('\n').forEach((line, i) => {
                if (FORBIDDEN.test(line)) offenders.push(`${p}:${i + 1}  ${line.trim()}`);
            });
        }
    }
}

walk(ROOT);
if (offenders.length) {
    console.error('core/ must not import the engine:\n' + offenders.join('\n'));
    process.exit(1);
}
console.log('core purity OK');