import assert from 'node:assert/strict';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import test from 'node:test';
import { analyzeCss, broadBusinessSelectors, verifyGlobalCssAbsent } from './verify-css-governance.mjs';

test('AST metrics ignore formatting and count selectors and important declarations', () => {
  assert.deepEqual(analyzeCss('.page { color: red !important; }\n.page a, .page button { display: block; }'), {
    rules: 2,
    selectors: 3,
    declarations: 2,
    important: 1,
    selectorList: ['.page', '.page a', '.page button'],
  });
});

test('broad business tag selectors are rejected while rooted selectors are allowed', () => {
  assert.deepEqual(broadBusinessSelectors('button { color: red; } .report-page button { color: blue; }'), ['button']);
});

test('formatting changes do not affect AST growth metrics', () => {
  assert.deepEqual(analyzeCss('.page{color:red}'), analyzeCss('.page {\n  color: red;\n}\n'));
});

test('global.css cannot be recreated after migration', () => {
  const directory = fs.mkdtempSync(path.join(os.tmpdir(), 'cmpp-css-gate-'));
  fs.mkdirSync(path.join(directory, 'src/styles'), { recursive: true });
  assert.doesNotThrow(() => verifyGlobalCssAbsent(directory));
  fs.writeFileSync(path.join(directory, 'src/styles/global.css'), '.new-page {}');
  assert.throws(() => verifyGlobalCssAbsent(directory), /禁止重新创建/);
  fs.rmSync(directory, { recursive: true, force: true });
});