/*
 * Description: Static and helper regression tests for MXPIC EDA frontend/backend integration contracts.
 * Inside functions: N/A - assertion-based test/module script.
 * Developer : Qin Yue @ 2026
 * Organization : OptiHK Limited
 */
const assert = require('assert');
const fs = require('fs');
const path = require('path');

const root = path.resolve(__dirname, '..');
const serverPy = fs.readFileSync(path.join(root, 'backend', 'server.py'), 'utf8');
const canvasHtml = fs.readFileSync(path.join(root, 'frontend', 'canvas.html'), 'utf8');

assert(
  serverPy.includes('EXPORT_ROOT'),
  'server should build GDS exports into a temporary export root'
);
assert(
  serverPy.includes("@app.route('/api/exports/<export_id>/<filename>'"),
  'server should expose an authenticated export download route'
);
assert(
  serverPy.includes('download_url'),
  'Build GDS response should include download_url'
);
assert(
  serverPy.includes('cleanup_expired_exports'),
  'server should clean exports older than the retention period'
);
assert(
  canvasHtml.includes('download_url'),
  'frontend should read download_url from Build GDS response'
);
assert(
  canvasHtml.includes('document.createElement') && canvasHtml.includes('.download'),
  'frontend should trigger a browser download for generated GDS'
);