{% extends 'school/base_school.html' %}
{% load static %}

{% block title %}Announcements | STD Lab{% endblock %}
{% block page_title %}Broadcast Announcements{% endblock %}

{% block content %}
<div class="card" style="max-width: 800px; margin: 0 auto;">
    <div style="display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 30px;">
        <div>
            <h2 style="font-size: 1.5rem; font-weight: 800; color: #0f172a;">Broadcast Hub</h2>
            <p style="color: #64748b; font-size: 0.9rem;">Send priority SMS notifications to selected classes.</p>
        </div>
        <div style="text-align: right; background: #f8fafc; padding: 10px 20px; border-radius: 12px; border: 1px solid #e2e8f0;">
            <p style="font-size: 0.7rem; font-weight: 800; color: #6366f1; text-transform: uppercase;">Usage Quota</p>
            <h3 style="font-size: 1.2rem; font-weight: 900; color: #1e293b;">{{ remaining }} <span style="font-size: 0.8rem; color: #94a3b8; font-weight: 600;">Left this month</span></h3>
        </div>
    </div>

    {% if messages %}
        {% for message in messages %}
            <div style="padding: 15px; border-radius: 12px; margin-bottom: 20px; background: {% if message.tags == 'success' %}#f0fdf4; color: #166534; border: 1px solid #bbf7d0;{% else %}#fef2f2; color: #991b1b; border: 1px solid #fecaca;{% endif %}; font-weight: 600;">
                {{ message }}
            </div>
        {% endfor %}
    {% endif %}

    <form method="POST" style="display: flex; flex-direction: column; gap: 25px;">
        {% csrf_token %}
        
        <div>
            <label style="display: block; font-size: 0.85rem; font-weight: 800; color: #1e293b; margin-bottom: 10px;">Select Target Classes</label>
            <div style="display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; background: #f8fafc; padding: 20px; border-radius: 16px; border: 1px solid #e2e8f0;">
                {% for class in classes %}
                <label style="display: flex; align-items: center; gap: 10px; cursor: pointer; padding: 8px; border-radius: 8px; transition: 0.2s;">
                    <input type="checkbox" name="classes" value="{{ class.id }}" style="width: 18px; height: 18px; accent-color: #6366f1;">
                    <span style="font-size: 0.9rem; font-weight: 700; color: #334155;">{{ class.name }}</span>
                </label>
                {% endfor %}
            </div>
        </div>

        <div>
            <div style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px;">
                <label style="font-size: 0.85rem; font-weight: 800; color: #1e293b;">Message Content (English Only)</label>
                <span id="wordCount" style="font-size: 0.75rem; font-weight: 800; color: #64748b;">0 / 30 Words</span>
            </div>
            <textarea name="message" id="messageArea" rows="5" placeholder="Type your announcement here..." style="width: 100%; padding: 18px; border-radius: 16px; border: 1px solid #e2e8f0; font-size: 0.95rem; font-family: inherit; resize: vertical; background: #fff; transition: 0.3s; color: #1e293b;" required></textarea>
            <p style="font-size: 0.7rem; color: #94a3b8; font-weight: 600; margin-top: 8px;"><i class="fas fa-info-circle"></i> Max 30 words. Special characters and non-English characters may reduce quota.</p>
        </div>

        <button type="submit" id="submitBtn" style="padding: 18px; background: #0f172a; color: #fff; border-radius: 16px; border: none; font-size: 1rem; font-weight: 800; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 12px; transition: 0.3s; box-shadow: 0 10px 25px rgba(15, 23, 42, 0.15);" {% if not remaining %}disabled style="opacity: 0.5; cursor: not-allowed;"{% endif %}>
            <i class="fas fa-paper-plane"></i> Broadcast SMS
        </button>
    </form>
</div>

<script>
    const area = document.getElementById('messageArea');
    const badge = document.getElementById('wordCount');
    const btn = document.getElementById('submitBtn');

    area.addEventListener('input', function() {
        const text = this.value.trim();
        const words = text === '' ? 0 : text.split(/\s+/).length;
        
        badge.innerText = `${words} / 30 Words`;
        
        if (words > 30) {
            badge.style.color = '#ef4444';
            btn.disabled = true;
            btn.style.opacity = '0.5';
        } else {
            badge.style.color = '#64748b';
            {% if remaining %}
            btn.disabled = false;
            btn.style.opacity = '1';
            {% endif %}
        }
    });

    area.style.outline = 'none';
    area.addEventListener('focus', () => area.style.borderColor = '#6366f1');
    area.addEventListener('blur', () => area.style.borderColor = '#e2e8f0');
</script>
{% endblock %}