{% extends "base.html" %}

{% block title %}Encode Message - Stegasoo{% endblock %}

{% block content %}
<div class="row justify-content-center">
    <div class="col-lg-8">
        <div class="card">
            <div class="card-header">
                <h5 class="mb-0"><i class="bi bi-lock-fill me-2"></i>Encode Secret Message</h5>
            </div>
            <div class="card-body">
                <form method="POST" enctype="multipart/form-data" id="encodeForm">
                    <div class="row">
                        <div class="col-md-6 mb-3">
                            <label class="form-label">
                                <i class="bi bi-image me-1"></i> Reference Photo
                            </label>
                            <input type="file" name="reference_photo" class="form-control" 
                                   accept="image/*" required>
                            <div class="form-text">
                                The secret photo both parties have (NOT transmitted)
                            </div>
                        </div>
                        
                        <div class="col-md-6 mb-3">
                            <label class="form-label">
                                <i class="bi bi-file-image me-1"></i> Carrier Image
                            </label>
                            <input type="file" name="carrier" class="form-control" 
                                   accept="image/*" required>
                            <div class="form-text">
                                The image to hide your message in (e.g., a meme)
                            </div>
                        </div>
                    </div>
                    
                    <div class="mb-3">
                        <label class="form-label">
                            <i class="bi bi-chat-left-text me-1"></i> Secret Message
                        </label>
                        <textarea name="message" class="form-control" rows="4" 
                                  placeholder="Enter your secret message here..." required></textarea>
                    </div>
                    
                    <div class="row">
                        <div class="col-md-8 mb-3">
                            <label class="form-label">
                                <i class="bi bi-chat-quote me-1"></i> {{ day_of_week }}'s Phrase
                            </label>
                            <input type="text" name="day_phrase" class="form-control" 
                                   placeholder="e.g., correct horse battery" required>
                            <div class="form-text">
                                Your 3-word phrase for today (from your phrase card)
                            </div>
                        </div>
                        
                        <div class="col-md-4 mb-3">
                            <label class="form-label">
                                <i class="bi bi-123 me-1"></i> PIN
                            </label>
                            <input type="password" name="pin" class="form-control" 
                                   placeholder="123456" maxlength="10">
                            <div class="form-text">
                                Your static 6-digit PIN
                            </div>
                        </div>
                    </div>
                    
                    <button type="submit" class="btn btn-primary btn-lg w-100" id="encodeBtn">
                        <i class="bi bi-lock me-2"></i>Encode & Download
                    </button>
                </form>
                
                <hr class="my-4">
                
                <div class="row text-center text-muted small">
                    <div class="col-4">
                        <i class="bi bi-shield-check fs-4 d-block mb-1 text-success"></i>
                        AES-256-GCM Encryption
                    </div>
                    <div class="col-4">
                        <i class="bi bi-shuffle fs-4 d-block mb-1 text-info"></i>
                        Random Pixel Embedding
                    </div>
                    <div class="col-4">
                        <i class="bi bi-eye-slash fs-4 d-block mb-1 text-warning"></i>
                        Undetectable by Analysis
                    </div>
                </div>
                
                <div class="alert alert-secondary mt-4 small">
                    <i class="bi bi-info-circle me-1"></i>
                    <strong>Limits:</strong> 
                    Carrier image max ~4 megapixels (2000×2000). 
                    Files max 5MB each. 
                    Message max 50KB.
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
document.getElementById('encodeForm').addEventListener('submit', function(e) {
    const btn = document.getElementById('encodeBtn');
    
    btn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Encoding...';
    btn.disabled = true;
    
    // Argon2 key derivation can take a few seconds
    // Reset button after encoding completes (file downloads don't navigate)
    setTimeout(function() {
        btn.innerHTML = '<i class="bi bi-check-circle me-2"></i>Done! Encode Another?';
        btn.disabled = false;
        btn.classList.remove('btn-primary');
        btn.classList.add('btn-success');
        
        // Reset to original state after a moment
        setTimeout(function() {
            btn.innerHTML = '<i class="bi bi-lock me-2"></i>Encode & Download';
            btn.classList.remove('btn-success');
            btn.classList.add('btn-primary');
        }, 2000);
    }, 4000);  // 4 seconds for Argon2 + embedding
});
</script>
{% endblock %}