{% extends "base.html" %}
{% block title %}{{ profile_user.username }} 的明信片{% endblock %}
{% block nav %}{% endblock %}
{% block content %}
<div class="section-header">
    <h1>📮 {{ profile_user.username }} 的明信片</h1>
</div>

{% set has_content = (sent_all|length + received_all|length) > 0 %}
{% if not has_content %}
<div class="empty-state">
    <p>暂无展示内容</p>
</div>
{% else %}

<div class="tabs" id="tabs">
    <button class="tab active" onclick="switchTab('sent')">发出 ({{ sent_all|length }})</button>
    <button class="tab" onclick="switchTab('received')">收到 ({{ received_all|length }})</button>
</div>

<div id="tab-sent" class="tab-panel">
{% if mode == 'flat' %}
    <div class="showcase-grid">
    {% for pc in sent_all %}
        <div class="showcase-card" data-front="{{ pc.image_front or '' }}" data-number="{{ pc.card_number }}" onclick="openLightbox(this)">
            {% if pc.image_front %}
            <img src="{{ pc.image_front }}" alt="" class="showcase-card-img" loading="lazy">
            {% else %}
            <div class="showcase-card-img placeholder-img">📷</div>
            {% endif %}
            <div class="showcase-card-body">
                <strong>{{ pc.card_number }}</strong>
                <div class="showcase-card-meta">
                    <span>{{ pc.country|flag }} {{ pc.country or '' }}</span>
                    {% if pc.send_time %}<span>{{ pc.send_time.strftime('%Y-%m-%d') }}</span>{% endif %}
                </div>
            </div>
        </div>
    {% endfor %}
    </div>
{% else %}
    {% for g in profile_groups %}
    {% if g.sent %}
    <h3 style="margin:1rem 0 .75rem;font-size:.95rem;color:var(--text-muted)">{{ g.profile.nickname }}</h3>
    <div class="showcase-grid">
        {% for pc in g.sent %}
        <div class="showcase-card" data-front="{{ pc.image_front or '' }}" data-number="{{ pc.card_number }}" onclick="openLightbox(this)">
            {% if pc.image_front %}
            <img src="{{ pc.image_front }}" alt="" class="showcase-card-img" loading="lazy">
            {% else %}
            <div class="showcase-card-img placeholder-img">📷</div>
            {% endif %}
            <div class="showcase-card-body">
                <strong>{{ pc.card_number }}</strong>
                <div class="showcase-card-meta">
                    <span>{{ pc.country|flag }} {{ pc.country or '' }}</span>
                    {% if pc.send_time %}<span>{{ pc.send_time.strftime('%Y-%m-%d') }}</span>{% endif %}
                </div>
            </div>
        </div>
        {% endfor %}
    </div>
    {% endif %}
    {% endfor %}
{% endif %}
</div>

<div id="tab-received" class="tab-panel" style="display:none">
{% if mode == 'flat' %}
    <div class="showcase-grid">
    {% for pc in received_all %}
        <div class="showcase-card" data-front="{{ pc.image_front or '' }}" data-number="{{ pc.card_number }}" onclick="openLightbox(this)">
            {% if pc.image_front %}
            <img src="{{ pc.image_front }}" alt="" class="showcase-card-img" loading="lazy">
            {% else %}
            <div class="showcase-card-img placeholder-img">📷</div>
            {% endif %}
            <div class="showcase-card-body">
                <strong>{{ pc.card_number }}</strong>
                <div class="showcase-card-meta">
                    <span>{{ pc.country|flag }} {{ pc.country or '' }}</span>
                    {% if pc.receive_time %}<span>{{ pc.receive_time.strftime('%Y-%m-%d') }}</span>{% endif %}
                </div>
            </div>
        </div>
    {% endfor %}
    </div>
{% else %}
    {% for g in profile_groups %}
    {% if g.received %}
    <h3 style="margin:1rem 0 .75rem;font-size:.95rem;color:var(--text-muted)">{{ g.profile.nickname }}</h3>
    <div class="showcase-grid">
        {% for pc in g.received %}
        <div class="showcase-card" data-front="{{ pc.image_front or '' }}" data-number="{{ pc.card_number }}" onclick="openLightbox(this)">
            {% if pc.image_front %}
            <img src="{{ pc.image_front }}" alt="" class="showcase-card-img" loading="lazy">
            {% else %}
            <div class="showcase-card-img placeholder-img">📷</div>
            {% endif %}
            <div class="showcase-card-body">
                <strong>{{ pc.card_number }}</strong>
                <div class="showcase-card-meta">
                    <span>{{ pc.country|flag }} {{ pc.country or '' }}</span>
                    {% if pc.receive_time %}<span>{{ pc.receive_time.strftime('%Y-%m-%d') }}</span>{% endif %}
                </div>
            </div>
        </div>
        {% endfor %}
    </div>
    {% endif %}
    {% endfor %}
{% endif %}
</div>
{% endif %}

<div id="lightbox" class="lightbox" onclick="closeLightbox(event)">
    <button class="lightbox-close" onclick="closeLightbox(event)">&times;</button>
    <button class="lightbox-prev" onclick="navLightbox(-1,event)">&#10094;</button>
    <button class="lightbox-next" onclick="navLightbox(1,event)">&#10095;</button>
    <div class="lightbox-content" onclick="event.stopPropagation()">
        <img id="lightbox-img" src="" alt="">
        <div id="lightbox-caption" class="lightbox-caption"></div>
    </div>
</div>

<script>
function switchTab(name) {
    document.querySelectorAll('.tab').forEach(function(t) { t.classList.remove('active'); });
    document.querySelectorAll('.tab-panel').forEach(function(p) { p.style.display = 'none'; });
    event.currentTarget.classList.add('active');
    document.getElementById('tab-' + name).style.display = '';
}

var lightboxItems = [];
var lightboxIdx = 0;

function buildLightboxItems() {
    lightboxItems = [];
    var visible = document.querySelectorAll('.tab-panel:not([style*="display:none"]) .showcase-card[data-front]');
    visible.forEach(function(card) {
        var front = card.getAttribute('data-front');
        var number = card.getAttribute('data-number');
        if (front) lightboxItems.push({src: front, number: number});
    });
}

function openLightbox(el) {
    buildLightboxItems();
    var front = el.getAttribute('data-front');
    if (!front) return;
    var number = el.getAttribute('data-number');
    for (var i = 0; i < lightboxItems.length; i++) {
        if (lightboxItems[i].number === number) { lightboxIdx = i; break; }
    }
    showLightboxItem();
    document.getElementById('lightbox').classList.add('active');
    document.body.style.overflow = 'hidden';
}

function showLightboxItem() {
    if (!lightboxItems.length) return;
    var item = lightboxItems[lightboxIdx];
    document.getElementById('lightbox-img').src = item.src;
    document.getElementById('lightbox-caption').textContent = item.number + ' (' + (lightboxIdx+1) + '/' + lightboxItems.length + ')';
}

function closeLightbox(e) {
    if (e) e.stopPropagation();
    document.getElementById('lightbox').classList.remove('active');
    document.body.style.overflow = '';
}

function navLightbox(dir, e) {
    if (e) e.stopPropagation();
    if (!lightboxItems.length) return;
    lightboxIdx = (lightboxIdx + dir + lightboxItems.length) % lightboxItems.length;
    showLightboxItem();
}

document.addEventListener('keydown', function(e) {
    var lb = document.getElementById('lightbox');
    if (!lb || !lb.classList.contains('active')) return;
    if (e.key === 'Escape') closeLightbox();
    else if (e.key === 'ArrowLeft') navLightbox(-1);
    else if (e.key === 'ArrowRight') navLightbox(1);
});
</script>
{% endblock %}