'use strict';
const assert = require('node:assert');
const { shouldReadImage } = require('../lib/poll-guard');

let passed = 0;
function check(name, fn) {
  try { fn(); console.log('  ok -', name); passed++; }
  catch (e) { console.error('  FAIL -', name, e.message); process.exitCode = 1; }
}

check('纯文本时返回 false', () => {
  assert.strictEqual(shouldReadImage(['text/plain']), false);
  assert.strictEqual(shouldReadImage(['text/html']), false);
});

check('空数组返回 false', () => {
  assert.strictEqual(shouldReadImage([]), false);
});

check('空格式列表返回 false', () => {
  assert.strictEqual(shouldReadImage(['']), false);
});

check('纯图片返回 true', () => {
  assert.strictEqual(shouldReadImage(['image/png']), true);
  assert.strictEqual(shouldReadImage(['image/bmp']), true);
  assert.strictEqual(shouldReadImage(['image/jpeg']), true);
});

check('文本+图片混合返回 true', () => {
  assert.strictEqual(shouldReadImage(['text/plain', 'image/png']), true);
});

check('非数组容错', () => {
  assert.strictEqual(shouldReadImage(null), false);
  assert.strictEqual(shouldReadImage(undefined), false);
  assert.strictEqual(shouldReadImage('image/png'), false);
});

check('非字符串元素容错', () => {
  assert.strictEqual(shouldReadImage([null, 'image/png']), true);
  assert.strictEqual(shouldReadImage([42, 'text/plain']), false);
});

check('只匹配 image/ 开头，不被 text/image 之类误判', () => {
  assert.strictEqual(shouldReadImage(['text/image']), false);
});

// ---------- 主进程接入回归 ----------

const fs = require('node:fs');
const path = require('node:path');
const mainSrc = fs.readFileSync(path.join(__dirname, '..', 'main.js'), 'utf8');

check('main.js 已 require poll-guard', () => {
  assert.ok(
    /require\(\s*'\.\/lib\/poll-guard'\s*\)/.test(mainSrc),
    'main.js 没 require poll-guard'
  );
});

check('pollClipboard 在 readImage 前调用了 shouldReadImage', () => {
  // 抓出 pollClipboard 整个函数体
  const fn = mainSrc.match(/function pollClipboard[\s\S]*?\n\}/);
  assert.ok(fn, '找不到 pollClipboard');
  const idxGuard = fn[0].indexOf('shouldReadImage');
  const idxRead = fn[0].indexOf('readImage');
  assert.ok(idxGuard > 0, 'pollClipboard 没调用 shouldReadImage');
  assert.ok(idxRead > 0, 'pollClipboard 没调用 readImage');
  assert.ok(idxGuard < idxRead, 'shouldReadImage 必须在 readImage 之前出现');
});

console.log(`\n${passed} checks passed`);