{% extends "base.html" %}

{% load static %}

{% block title %}Two-Factor Authentication - Stream Processor{% endblock %}

{% block page_title %}
    <div class="flex items-center">
        <i class="fas fa-shield-alt mr-3 text-primary-600"></i>
        Two-Factor Authentication
    </div>
{% endblock %}

{% block extra_head %}
<style>
    
    .security-icon {
        width: 80px;
        height: 80px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 2rem;
        color: white;
        font-size: 2rem;
    }
    
    .token-input {
        width: 100%;
        padding: 1.5rem;
        border: 2px solid #e2e8f0;
        border-radius: 12px;
        font-size: 1.5rem;
        text-align: center;
        letter-spacing: 0.5rem;
        font-family: 'Courier New', monospace;
        font-weight: bold;
        transition: all 0.3s ease;
        background: #f8fafc;
        margin-bottom: 1.5rem;
    }
    
    .token-input:focus {
        outline: none;
        border-color: #667eea;
        background: white;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }
    
    .verify-btn {
        width: 100%;
        padding: 1rem;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border: none;
        border-radius: 12px;
        font-size: 1.1rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
        margin-bottom: 1rem;
    }
    
    .verify-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
    }
    
    .backup-link {
        display: inline-block;
        color: #667eea;
        text-decoration: none;
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
        border: 1px solid #667eea;
        border-radius: 8px;
        transition: all 0.3s ease;
        margin-top: 1rem;
    }
    
    .backup-link:hover {
        background: #667eea;
        color: white;
    }
    
    .error-message {
        background: #fee2e2;
        border: 1px solid #fecaca;
        color: #dc2626;
        padding: 1rem;
        border-radius: 8px;
        margin-bottom: 1.5rem;
    }
    
    .info-box {
        background: #eff6ff;
        border: 1px solid #bfdbfe;
        color: #1e40af;
        padding: 1rem;
        border-radius: 8px;
        margin-bottom: 1.5rem;
        font-size: 0.9rem;
    }
    
    .countdown {
        font-size: 0.8rem;
        color: #6b7280;
        margin-top: 1rem;
    }
    
    .loading {
        display: none;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }
    
    .verify-btn.loading .btn-text {
        opacity: 0;
    }
    
    .verify-btn.loading .loading {
        display: block;
    }
</style>
{% endblock %}

{% block content %}
<div class="min-h-screen bg-gray-50 py-8">
    <div class="max-w-md mx-auto px-4 sm:px-6 lg:px-8">
        <!-- Header -->
        <div class="bg-white shadow rounded-lg mb-6">
            <div class="px-6 py-4 border-b border-gray-200">
                <div class="flex items-center justify-center">
                    <div class="flex-shrink-0">
                        <div class="w-12 h-12 bg-blue-100 rounded-full flex items-center justify-center">
                            <i class="fas fa-shield-alt text-blue-600 text-xl"></i>
                        </div>
                    </div>
                    <div class="ml-4 text-center">
                        <h1 class="text-lg font-medium text-gray-900">Two-Factor Authentication</h1>
                        <p class="text-sm text-gray-500">
                            Hi {{ user.get_full_name|default:user.username }}, please enter the 6-digit code from your authenticator app.
                        </p>
                    </div>
                </div>
            </div>
        </div>

        <!-- Main Content -->
        <div class="bg-white shadow rounded-lg">
            <div class="px-6 py-6">
        
                {% if messages %}
                    {% for message in messages %}
                        <div class="bg-red-50 border border-red-200 rounded-lg p-4 mb-4">
                            <div class="flex">
                                <div class="flex-shrink-0">
                                    <i class="fas fa-exclamation-triangle text-red-400"></i>
                                </div>
                                <div class="ml-3">
                                    <p class="text-sm text-red-700">{{ message }}</p>
                                </div>
                            </div>
                        </div>
                    {% endfor %}
                {% endif %}
                
                {% if form.non_field_errors %}
                    <div class="bg-red-50 border border-red-200 rounded-lg p-4 mb-4">
                        <div class="flex">
                            <div class="flex-shrink-0">
                                <i class="fas fa-exclamation-triangle text-red-400"></i>
                            </div>
                            <div class="ml-3">
                                {% for error in form.non_field_errors %}
                                    <p class="text-sm text-red-700">{{ error }}</p>
                                {% endfor %}
                            </div>
                        </div>
                    </div>
                {% endif %}
                
                <div class="bg-blue-50 border border-blue-200 rounded-lg p-4 mb-6">
                    <div class="flex">
                        <div class="flex-shrink-0">
                            <i class="fas fa-info-circle text-blue-400"></i>
                        </div>
                        <div class="ml-3">
                            <p class="text-sm text-blue-700">
                                Open your authenticator app and enter the current 6-digit code.
                            </p>
                        </div>
                    </div>
                </div>
                
                <form method="post" id="verifyForm">
                    {% csrf_token %}
                    
                    <div class="mb-4">
                        <input type="text" 
                               name="{{ form.token.name }}" 
                               id="{{ form.token.id_for_label }}"
                               class="w-full px-4 py-3 border border-gray-300 rounded-lg text-center text-xl font-mono tracking-widest focus:ring-2 focus:ring-blue-500 focus:border-blue-500{% if form.token.errors %} border-red-500{% endif %}"
                               placeholder="000000"
                               maxlength="6"
                               pattern="[0-9]{6}"
                               autocomplete="one-time-code"
                               required
                               autofocus>
                        
                        {% if form.token.errors %}
                            <div class="mt-2 text-sm text-red-600">
                                {% for error in form.token.errors %}
                                    {{ error }}
                                {% endfor %}
                            </div>
                        {% endif %}
                    </div>
                    
                    <button type="submit" class="w-full bg-blue-600 hover:bg-blue-700 text-white font-medium py-3 px-4 rounded-lg transition duration-150 ease-in-out mb-4" id="verifyBtn">
                        <span class="btn-text">
                            <i class="fas fa-check mr-2"></i>
                            Verify Code
                        </span>
                        <div class="loading hidden">
                            <i class="fas fa-spinner fa-spin"></i>
                        </div>
                    </button>
                </form>
        
                <div class="text-center">
                    <a href="{% url 'authentication:backup_code' %}" class="inline-flex items-center text-sm text-blue-600 hover:text-blue-800 transition duration-150 ease-in-out">
                        <i class="fas fa-key mr-2"></i>
                        Use a backup code instead
                    </a>
                </div>
                
                <div class="text-center mt-4">
                    <a href="{% url 'authentication:login' %}" class="inline-flex items-center text-sm text-gray-600 hover:text-gray-800 transition duration-150 ease-in-out">
                        <i class="fas fa-arrow-left mr-2"></i>
                        Return to login
                    </a>
                </div>
                
                <div class="countdown bg-yellow-50 border border-yellow-200 rounded-lg p-3 mt-4 text-center" id="countdown" style="display: none;">
                    <div class="flex items-center justify-center">
                        <i class="fas fa-clock text-yellow-600 mr-2"></i>
                        <span class="text-sm text-yellow-700">
                            Code expires in <span id="countdownTimer" class="font-medium">30</span> seconds
                        </span>
                    </div>
                </div>
    </div>
</div>

<script>
// Auto-format token input
document.getElementById('{{ form.token.id_for_label }}').addEventListener('input', function(e) {
    // Only allow numbers
    e.target.value = e.target.value.replace(/[^0-9]/g, '');
    
    // Auto-submit when 6 digits are entered
    if (e.target.value.length === 6) {
        setTimeout(() => {
            document.getElementById('verifyForm').submit();
        }, 500);
    }
});

// Form submission loading state
document.getElementById('verifyForm').addEventListener('submit', function() {
    const verifyBtn = document.getElementById('verifyBtn');
    verifyBtn.classList.add('loading');
    verifyBtn.disabled = true;
});

// Countdown timer (simulated)
let timeLeft = 30;
const timer = document.getElementById('timer');
const countdown = setInterval(() => {
    timeLeft--;
    timer.textContent = timeLeft;
    
    if (timeLeft <= 0) {
        clearInterval(countdown);
        timer.textContent = '0';
        document.getElementById('countdown').innerHTML = 
            '<i class="fas fa-exclamation-triangle mr-1 text-orange-500"></i>' +
            '<span class="text-orange-500">Code may have expired. Please try again.</span>';
    }
}, 1000);

// Keyboard shortcuts
document.addEventListener('keydown', function(e) {
    // Focus token input on any number key
    if (e.key >= '0' && e.key <= '9') {
        const tokenInput = document.getElementById('{{ form.token.id_for_label }}');
        if (document.activeElement !== tokenInput) {
            tokenInput.focus();
        }
    }
});
</script>
{% endblock %}