const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');

const source = fs.readFileSync('content/phplife-mail.js', 'utf8');

function extractFunction(name) {
  const markers = [`async function ${name}(`, `function ${name}(`];
  const start = markers
    .map((marker) => source.indexOf(marker))
    .find((index) => index >= 0);
  if (start < 0) {
    throw new Error(`missing function ${name}`);
  }

  let parenDepth = 0;
  let signatureEnded = false;
  let braceStart = -1;
  for (let i = start; i < source.length; i += 1) {
    const ch = source[i];
    if (ch === '(') {
      parenDepth += 1;
    } else if (ch === ')') {
      parenDepth -= 1;
      if (parenDepth === 0) {
        signatureEnded = true;
      }
    } else if (ch === '{' && signatureEnded) {
      braceStart = i;
      break;
    }
  }
  if (braceStart < 0) {
    throw new Error(`missing body for function ${name}`);
  }

  let depth = 0;
  let end = braceStart;
  for (; end < source.length; end += 1) {
    const ch = source[end];
    if (ch === '{') depth += 1;
    if (ch === '}') {
      depth -= 1;
      if (depth === 0) {
        end += 1;
        break;
      }
    }
  }

  return source.slice(start, end);
}

test('phplife mail parser extracts code and recipient from roundcube message view', () => {
  const bundle = [
    extractFunction('normalizeText'),
    extractFunction('parseRoundcubeTimestamp'),
    extractFunction('extractVerificationCodes'),
    extractFunction('getMessageDetailsFromDocument'),
  ].join('\n');

  const api = new Function(`${bundle}
return { getMessageDetailsFromDocument, parseRoundcubeTimestamp, extractVerificationCodes };
`)();

  const selectors = {
    'h2.subject': { textContent: 'Your ChatGPT code is 866785' },
    '.headers-table .header.from': { textContent: 'noreply@tm.openai.com' },
    '.headers-table .header.to': { textContent: 'n2026041807@a4sky.com' },
    '.headers-table .header.date': { textContent: '今天 12:30' },
    '#messagebody': {
      innerText: 'Enter this temporary verification code to continue: 866785. ChatGPT Log-in Code 866785',
      textContent: 'Enter this temporary verification code to continue: 866785. ChatGPT Log-in Code 866785',
    },
  };

  const fakeDocument = {
    querySelector(selector) {
      return selectors[selector] || null;
    },
    body: {
      innerText: '',
      textContent: '',
    },
  };

  const details = api.getMessageDetailsFromDocument(fakeDocument);

  assert.equal(details.subject, 'Your ChatGPT code is 866785');
  assert.equal(details.from, 'noreply@tm.openai.com');
  assert.equal(details.to, 'n2026041807@a4sky.com');
  assert.equal(details.codes[0], '866785');
  assert.equal(Number.isFinite(details.emailTimestamp), true);
});

test('phplife mail parser can read verification code directly from list row title', () => {
  const bundle = [
    extractFunction('normalizeText'),
    extractFunction('parseRoundcubeTimestamp'),
    extractFunction('extractVerificationCodes'),
    extractFunction('getRowText'),
    extractFunction('getRowDetails'),
  ].join('\n');

  const api = new Function(`${bundle}
return { getRowDetails };
`)();

  const subjectNode = {
    getAttribute(name) {
      return name === 'title' ? 'Your ChatGPT code is 866785' : '';
    },
    textContent: 'fallback subject',
  };
  const fromNode = { getAttribute() { return ''; }, textContent: 'noreply@tm.openai.com' };
  const toNode = { getAttribute() { return ''; }, textContent: 'n2026041807@a4sky.com' };
  const dateNode = { getAttribute() { return ''; }, textContent: '今天 12:30' };

  const fakeRow = {
    querySelector(selector) {
      if (selector === 'td.subject') return subjectNode;
      if (selector === 'td.fromto') return fromNode;
      if (selector === 'td.to') return toNode;
      if (selector === 'td.date') return dateNode;
      return null;
    },
    textContent: 'Your ChatGPT code is 866785 noreply@tm.openai.com n2026041807@a4sky.com 今天 12:30',
  };

  const details = api.getRowDetails(fakeRow);

  assert.equal(details.subject, 'Your ChatGPT code is 866785');
  assert.equal(details.codes[0], '866785');
});