{% extends "base.html" %}
{% block title %}Question — {{ settings.APP_NAME }}{% endblock %}

{% block content %}
<div class="container page-content">
    <div id="questionDetail"></div>
</div>
{% endblock %}

{% block extra_js %}
<script>
const questionId = {{ question_id }};
const currentUserId = {{ user.id if user else 'null' }};

async function loadQuestion() {
    const res = await fetch(`/api/questions/${questionId}`);
    if (!res.ok) { document.getElementById('questionDetail').innerHTML = '<h2>Question not found</h2>'; return; }
    const q = await res.json();
    document.title = q.title + ' — {{ settings.APP_NAME }}';

    document.getElementById('questionDetail').innerHTML = `
        <div class="question-detail">
            <div class="q-detail-header">
                ${q.field ? `<span class="pub-field-badge" style="background:${q.field.color}">${q.field.name}</span>` : ''}
                <div class="q-detail-tags">${(q.tags || []).map(t => `<span class="tag">${t.name}</span>`).join('')}</div>
            </div>
            <h1>${escapeHtml(q.title)}</h1>

            <div class="q-detail-body-row">
                <div class="vote-controls">
                    <button class="vote-btn" onclick="voteQuestion(1)">▲</button>
                    <span class="vote-count" id="qVoteCount">${q.vote_count}</span>
                    <button class="vote-btn" onclick="voteQuestion(-1)">▼</button>
                </div>
                <div class="q-detail-body">
                    <div class="q-body-text">${escapeHtml(q.body).replace(/\\n/g, '<br>')}</div>
                    <div class="q-author-card">
                        <div class="author-avatar">${q.author.full_name[0]}</div>
                        <div class="author-info">
                            <a href="/profile/${q.author.username}" class="author-name">
                                ${escapeHtml(q.author.full_name)}
                                ${q.author.is_verified ? '<span class="verified-badge">✓</span>' : ''}
                            </a>
                            ${q.author.affiliation ? `<div class="author-affiliation">${escapeHtml(q.author.affiliation.designation)}, ${escapeHtml(q.author.affiliation.institution)}</div>` : ''}
                        </div>
                        <span class="q-date">${new Date(q.created_at).toLocaleDateString()}</span>
                    </div>
                    <div class="q-stats">
                        <span>👁 ${q.view_count} views</span>
                        <span>💬 ${q.answer_count} answers</span>
                    </div>
                </div>
            </div>

            <hr>
            <h2>${q.answers.length} Answer${q.answers.length !== 1 ? 's' : ''}</h2>

            <div class="answers-list">
                ${q.answers.map(a => `
                    <div class="answer ${a.is_accepted ? 'answer-accepted' : ''}">
                        <div class="vote-controls">
                            <button class="vote-btn" onclick="voteAnswer(${a.id}, 1)">▲</button>
                            <span class="vote-count">${a.vote_count}</span>
                            <button class="vote-btn" onclick="voteAnswer(${a.id}, -1)">▼</button>
                            ${a.is_accepted ? '<div class="accepted-mark" title="Accepted answer">✓</div>' : ''}
                        </div>
                        <div class="answer-body">
                            <div class="answer-text">${escapeHtml(a.body).replace(/\\n/g, '<br>')}</div>
                            <div class="q-author-card">
                                <div class="author-avatar">${a.author.full_name[0]}</div>
                                <div class="author-info">
                                    <a href="/profile/${a.author.username}" class="author-name">
                                        ${escapeHtml(a.author.full_name)}
                                        ${a.author.is_verified ? '<span class="verified-badge">✓</span>' : ''}
                                    </a>
                                    ${a.author.affiliation ? `<div class="author-affiliation">${escapeHtml(a.author.affiliation.designation)}, ${escapeHtml(a.author.affiliation.institution)}</div>` : ''}
                                </div>
                                <span class="q-date">${new Date(a.created_at).toLocaleDateString()}</span>
                            </div>
                            ${currentUserId === q.author.id && !a.is_accepted ? `<button class="btn btn-sm btn-outline" onclick="acceptAnswer(${a.id})">Accept Answer</button>` : ''}
                        </div>
                    </div>
                `).join('')}
            </div>

            ${currentUserId ? `
                <div class="answer-form-section">
                    <h3>Your Answer</h3>
                    <form id="answerForm">
                        <textarea id="answerBody" required rows="6" class="form-control" placeholder="Write your answer..."></textarea>
                        <button type="submit" class="btn btn-primary">Post Answer</button>
                    </form>
                </div>
            ` : '<p><a href="/login">Log in</a> to answer this question.</p>'}
        </div>
    `;

    const answerForm = document.getElementById('answerForm');
    if (answerForm) {
        answerForm.addEventListener('submit', async (e) => {
            e.preventDefault();
            const body = document.getElementById('answerBody').value;
            const res = await fetch(`/api/questions/${questionId}/answers`, {
                method: 'POST',
                headers: {'Content-Type': 'application/json'},
                body: JSON.stringify({ body }),
            });
            if (res.ok) location.reload();
        });
    }
}

async function voteQuestion(value) {
    if (!currentUserId) { window.location.href = '/login'; return; }
    const res = await fetch(`/api/questions/${questionId}/vote?value=${value}`, { method: 'POST' });
    if (res.ok) {
        const data = await res.json();
        document.getElementById('qVoteCount').textContent = data.vote_count;
    }
}

async function voteAnswer(answerId, value) {
    if (!currentUserId) { window.location.href = '/login'; return; }
    await fetch(`/api/questions/answers/${answerId}/vote?value=${value}`, { method: 'POST' });
    location.reload();
}

async function acceptAnswer(answerId) {
    await fetch(`/api/questions/answers/${answerId}/accept`, { method: 'POST' });
    location.reload();
}

loadQuestion();
</script>
{% endblock %}