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/**
* Quiz Engine - Renderiza questões na página
*/
function _renderQuestion(q) {
if (!q) return;
const body = document.getElementById('quiz-body');
if (!body) return;
const counter = document.getElementById('q-counter');
if (counter) {
counter.textContent = `${_qState.qIndex + 1} de ${_qState.questions.length}`;
}
const prog = document.getElementById('prog');
if (prog) {
const pct = ((_qState.qIndex + 1) / _qState.questions.length) * 100;
prog.style.width = pct + '%';
}
if (q.type === 'mc') {
body.innerHTML = `<div class="mc-area fade">
<p class="q-text">${md(q.text)}</p>
<div class="options">
${q.options
.map(
(o, i) => `<button class="opt" data-opt="${esc(o)}" data-answer="${esc(q.answer)}" onclick="selectOpt(this)" aria-label="Opção ${LETRAS[i]}: ${o}">
<span class="opt-letter">${LETRAS[i]}</span>
<span>${md(o)}</span>
</button>`
)
.join('')}
</div>
<div class="feedback-line" id="feedback" aria-live="polite" aria-atomic="true"><span class="feedback-dot"></span><span id="feedback-msg"></span></div>
${q.comment ? `<div class="comment-block" id="comment"><div class="comment-label">comentário</div><div>${md(q.comment)}</div></div>` : ''}
</div>`;
} else {
// Modo Flashcard para questões abertas
const isRevealed = _qState.flipped || false;
body.innerHTML = `<div class="flashcard-area fade">
<p class="q-text">${md(q.text)}</p>
<div class="flashcard-simple" id="flashcard">
${!isRevealed ? `<button class="btn btn-reveal" onclick="flipFlashcard()">Revelar Resposta</button>` : `<div class="ref-label">resposta de referência</div><div class="ref-content">${md(q.reference)}</div>`}
</div>
<div class="feedback-line" id="feedback" aria-live="polite" aria-atomic="true"><span class="feedback-dot"></span><span id="feedback-msg"></span></div>
${q.comment ? `<div class="comment-block" id="comment"><div class="comment-label">comentário</div><div>${md(q.comment)}</div></div>` : ''}
<div class="flashcard-btns" id="flashcard-btns">
<button class="btn btn-ok" onclick="markFlashcardOk()">✓ Acertei</button>
<button class="btn btn-bad" onclick="markFlashcardBad()">✗ Errei</button>
</div>
</div>`;
}
}
function selectOpt(btn) {
if (_qState.answered) return;
_qState.answered = true;
const chosen = btn.dataset.opt;
const correct = btn.dataset.answer;
btn.closest('.options').querySelectorAll('.opt').forEach((b) => {
b.disabled = true;
if (b.dataset.opt === correct) b.classList.add('correct');
else if (b === btn) b.classList.add('wrong');
else b.classList.add('revealed');
});
if (chosen === correct) {
_qState.acertos++;
setFeedback(true, 'Correto');
} else {
_qState.erros++;
setFeedback(false, 'Incorreto — a correta está destacada');
}
document.getElementById('comment')?.classList.add('show');
document.getElementById('btn-next').style.display = '';
}
function flipFlashcard() {
const card = document.getElementById('flashcard');
if (card) {
_qState.flipped = true;
_renderQuestion(_qState.questions[_qState.qIndex]);
}
}
function markFlashcardOk() {
_qState.answered = true;
_qState.acertos++;
setFeedback(true, 'Marcado como acertado');
document.getElementById('comment')?.classList.add('show');
document.getElementById('flashcard-btns').innerHTML = '';
document.getElementById('btn-next').style.display = '';
}
function markFlashcardBad() {
_qState.answered = true;
_qState.erros++;
setFeedback(false, 'Marcado como errado');
document.getElementById('comment')?.classList.add('show');
document.getElementById('flashcard-btns').innerHTML = '';
document.getElementById('btn-next').style.display = '';
}
function setFeedback(ok, msg) {
const fb = document.getElementById('feedback');
fb.className = 'feedback-line show ' + (ok ? 'ok' : 'bad');
document.getElementById('feedback-msg').textContent = msg;
}
function _buildResult() {
const { acertos, erros, questions } = _qState;
const total = questions.length;
const pct = total ? Math.round((acertos / total) * 100) : 0;
let nivel, detalhe;
if (pct >= 90) {
nivel = 'Excelente';
detalhe = 'Domínio consistente do conteúdo. Mantenha revisão periódica.';
} else if (pct >= 70) {
nivel = 'Bom';
detalhe = 'Base sólida com pontos a refinar. Revise os erros e releia os comentários.';
} else if (pct >= 50) {
nivel = 'Regular';
detalhe = 'Compreensão parcial, com lacunas importantes. Retome o material teórico.';
} else {
nivel = 'Insuficiente';
detalhe = 'Os conceitos centrais ainda não estão consolidados. Estude o tema e refaça.';
}
document.getElementById('res-pct').textContent = pct + '%';
document.getElementById('res-a').textContent = acertos;
document.getElementById('res-a2').textContent = acertos;
document.getElementById('res-e').textContent = erros;
document.getElementById('res-t').textContent = total;
document.getElementById('res-msg-body').innerHTML = `<strong>${nivel}</strong> — ${acertos} de ${total} (${pct}%). ${detalhe}`;
}
function _saveProgress(key) {
try {
localStorage.setItem(PROGRESS_PREFIX + key, JSON.stringify({
questions: _qState.questions,
qIndex: _qState.qIndex,
acertos: _qState.acertos,
erros: _qState.erros,
flipped: _qState.flipped,
}));
} catch (e) {}
}
function _loadProgress(key) {
try {
const s = localStorage.getItem(PROGRESS_PREFIX + key);
if (!s) return false;
const d = JSON.parse(s);
if (!d.questions || !d.questions.length) return false;
Object.assign(_qState, {
questions: d.questions,
qIndex: d.qIndex || 0,
acertos: d.acertos || 0,
erros: d.erros || 0,
flipped: d.flipped || false,
});
return true;
} catch (e) {
return false;
}
}
function _clearProgress(key) {
try {
localStorage.removeItem(PROGRESS_PREFIX + key);
} catch (e) {}
}
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