{% extends "base.html" %}

{% block title %}My Profile - PrepMate{% endblock %}

{% block content %}
<div class="container mt-4">
    <!-- Profile Header -->
    <div class="row mb-4">
        <div class="col-12 col-lg-3">
            <div class="d-flex align-items-start">
                {% if user_profile and user_profile.profile_picture_url %}
                <img src="{{ user_profile.profile_picture_url }}" 
                     alt="{{ user_profile.display_name }}" 
                     class="rounded-circle me-3"
                     style="width: 64px; height: 64px; object-fit: cover;">
                {% else %}
                <img src="https://archive.fosdem.org/2024/schedule/speaker/8MXH39/57d45efea75fcc9aceab1e6bbb44ea7f2362f8d9570b4a876e6c68b6deee5da3.png" 
                     alt="Default Avatar" 
                     class="rounded-circle me-3"
                     style="width: 64px; height: 64px; object-fit: cover;">
                {% endif %}
                <div class="flex-grow-1">
                    <h1 class="h3 mb-0">
                        {% if user_profile %}
                        {{ user_profile.display_name }}
                        {% else %}
                        My Profile
                        {% endif %}
                    </h1>
                    <p class="text-muted mb-0">
                        {% if user_profile %}
                        @{{ user_profile.user_id }}
                        {% endif %}
                    </p>
                </div>
            </div>
        </div>
        <div class="col-12 col-lg-9 mt-3 mt-lg-0">
            <div class="card">
                <div class="card-header">
                    <h3 class="h6 mb-0">About Profile Facts</h3>
                </div>
                <div class="card-body">
                    <p class="small mb-1">
                        Add facts that PrepMate should remember across all conversations.
                    </p>
                    <p class="small mb-1">Examples:</p>
                    <ul class="small mb-0" style="padding-left: 1.2rem;">
                        <li>Software Engineer</li>
                        <li>2 children</li>
                        <li>Allergic to peanuts</li>
                    </ul>
                </div>
            </div>
        </div>
    </div>

    <!-- Facts Section with Chat-like Interface -->
    <div class="row">
        <div class="col-12">
            <div class="card" style="height: 600px; display: flex; flex-direction: column;">
                <div class="card-header">
                    <h2 class="h5 mb-0">
                        <i class="bi bi-person-badge"></i> Profile Facts
                    </h2>
                    <small class="text-muted">Add information about yourself that PrepMate should remember</small>
                </div>
                
                <!-- Facts List (scrollable) -->
                <div class="card-body flex-grow-1" style="overflow-y: auto;" id="factsContainer">
                    {% if facts %}
                        {% for fact in facts %}
                        <div class="mb-2 fact-message">
                            <div class="d-flex align-items-start">
                                <div class="flex-grow-1">
                                    <div class="fact-card p-2">
                                        <div class="d-flex justify-content-between align-items-center">
                                            <span class="flex-grow-1">{{ fact.content }}</span>
                                            <div class="d-flex align-items-center ms-3">
                                                <small class="text-muted me-2" style="font-size: 0.75rem;">{{ fact.created_at }}</small>
                                                <button type="button" 
                                                        class="btn btn-sm btn-link text-danger p-0"
                                                        onclick="deleteFact('{{ fact.message_id }}')"
                                                        title="Delete fact">
                                                    <i class="bi bi-trash" style="font-size: 0.875rem;"></i>
                                                </button>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                        {% endfor %}
                    {% else %}
                    <div class="empty-state h-100 d-flex flex-column justify-content-center align-items-center">
                        <i class="bi bi-lightbulb" style="font-size: 3rem; color: #6c757d;"></i>
                        <p class="mt-3 text-muted">No facts yet. Start adding information about yourself below!</p>
                        <p class="small text-muted mb-0">Examples: "I work as a software engineer" or "I have 2 children"</p>
                    </div>
                    {% endif %}
                </div>
                
                <!-- Add Fact Input (chat-like) -->
                <div class="card-footer bg-light">
                    <!-- Error Messages (T009: Feature 001-refine-memory-producer-logic) -->
                    {% with messages = get_flashed_messages(with_categories=true) %}
                        {% if messages %}
                            {% for category, message in messages %}
                                <div class="alert alert-{{ 'danger' if category == 'error' else category }} alert-dismissible fade show mb-2" role="alert">
                                    {{ message }}
                                    <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
                                </div>
                            {% endfor %}
                        {% endif %}
                    {% endwith %}
                    
                    <form method="POST" action="{{ url_for('profile.add_fact') }}" id="addFactForm" onsubmit="handleSubmit(event); return false;">
                        <div class="input-group">
                            <textarea class="form-control" 
                                      id="factContent" 
                                      name="content" 
                                      rows="1" 
                                      maxlength="500"
                                      placeholder="Add a fact about yourself..."
                                      required
                                      style="resize: none;">{{ preserved_content or '' }}</textarea>
                            <button type="submit" class="btn btn-primary" id="submitBtn">
                                <i class="bi bi-send-fill" id="submitIcon"></i>
                                <span class="spinner-border spinner-border-sm d-none" id="submitSpinner" role="status" aria-hidden="true"></span>
                            </button>
                        </div>
                        <div class="d-flex justify-content-between align-items-center mt-2">
                            <small class="text-muted">
                                <i class="bi bi-info-circle"></i>
                                Press Enter to add (Shift+Enter for new line)
                            </small>
                            <small class="char-counter" id="charCounter">{{ (preserved_content|length) if preserved_content else 0 }} / 500</small>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- T019: Include message-cache.js for optimistic UI updates -->
<script src="{{ url_for('static', filename='js/message-cache.js') }}"></script>

<script>
// T020: Initialize cache on page load with session_id
{% if user_profile and user_profile.session_id %}
const SESSION_ID = '{{ user_profile.session_id }}';
messageCache.init(SESSION_ID);
{% endif %}

// Auto-resize textarea as user types
const textarea = document.getElementById('factContent');
const charCounter = document.getElementById('charCounter');
const factsContainer = document.getElementById('factsContainer');
const submitBtn = document.getElementById('submitBtn');
const submitIcon = document.getElementById('submitIcon');
const submitSpinner = document.getElementById('submitSpinner');

if (textarea) {
    // Auto-resize textarea
    textarea.addEventListener('input', function() {
        this.style.height = 'auto';
        this.style.height = Math.min(this.scrollHeight, 120) + 'px';
        
        // Update character counter
        charCounter.textContent = this.value.length + ' / 500';
        
        // Change color when approaching limit
        if (this.value.length > 450) {
            charCounter.classList.add('text-danger');
        } else {
            charCounter.classList.remove('text-danger');
        }
    });
    
    // Handle Enter key (submit) vs Shift+Enter (new line)
    textarea.addEventListener('keydown', function(e) {
        if (e.key === 'Enter' && !e.shiftKey) {
            e.preventDefault();
            if (this.value.trim().length > 0) {
                document.getElementById('addFactForm').submit();
            }
        }
    });
    
    // Initialize height for preserved content (T009)
    if (textarea.value.length > 0) {
        textarea.style.height = 'auto';
        textarea.style.height = Math.min(textarea.scrollHeight, 120) + 'px';
    }
}

// Auto-scroll to bottom on page load if there are facts
if (factsContainer) {
    const hasFacts = factsContainer.querySelector('.fact-message');
    if (hasFacts) {
        factsContainer.scrollTop = factsContainer.scrollHeight;
    }
}

// T021: Handle form submission with optimistic UI update
async function handleSubmit(event) {
    event.preventDefault();
    
    if (submitBtn.disabled) {
        return false;
    }
    
    const content = textarea.value.trim();
    if (!content) {
        return false;
    }
    
    // Disable button and show spinner
    submitBtn.disabled = true;
    submitIcon.classList.add('d-none');
    submitSpinner.classList.remove('d-none');
    
    try {
        // Add optimistic message to cache (displays immediately)
        await messageCache.addOptimisticMessage(content, 'user', 'fact');
        
        // Clear textarea
        textarea.value = '';
        textarea.style.height = 'auto';
        charCounter.textContent = '0 / 500';
        charCounter.classList.remove('text-danger');
        
        // Re-enable button
        submitBtn.disabled = false;
        submitIcon.classList.remove('d-none');
        submitSpinner.classList.add('d-none');
        
    } catch (error) {
        console.error('Error adding fact:', error);
        submitBtn.disabled = false;
        submitIcon.classList.remove('d-none');
        submitSpinner.classList.add('d-none');
        alert('Failed to add fact. Please try again.');
    }
    
    return false;
}

// Delete fact function
function deleteFact(messageId) {
    if (confirm('Are you sure you want to delete this fact?')) {
        const form = document.createElement('form');
        form.method = 'POST';
        form.action = '/profile/facts/delete/' + messageId;
        
        document.body.appendChild(form);
        form.submit();
    }
}

// T022: Render messages with sync status indicators
function renderMessages() {
    const messages = messageCache.getAllMessages();
    const container = factsContainer;
    
    // Clear existing facts (except empty state)
    const emptyState = container.querySelector('.empty-state');
    container.innerHTML = '';
    
    if (messages.length === 0) {
        if (emptyState) {
            container.appendChild(emptyState);
        } else {
            container.innerHTML = `
                <div class="empty-state h-100 d-flex flex-column justify-content-center align-items-center">
                    <i class="bi bi-lightbulb" style="font-size: 3rem; color: #6c757d;"></i>
                    <p class="mt-3 text-muted">No facts yet. Start adding information about yourself below!</p>
                    <p class="small text-muted mb-0">Examples: "I work as a software engineer" or "I have 2 children"</p>
                </div>
            `;
        }
        return;
    }
    
    // Render each message
    messages.forEach(message => {
        const messageDiv = document.createElement('div');
        messageDiv.className = 'mb-2 fact-message';
        messageDiv.dataset.messageId = message.id || message.tempId;
        
        // Add pending/failed classes
        if (message.syncStatus === 'pending' || message.syncStatus === 'syncing') {
            messageDiv.classList.add('message-pending');
        } else if (message.syncStatus === 'failed') {
            messageDiv.classList.add('message-failed');
        }
        
        const timestamp = message.timestamp 
            ? new Date(message.timestamp).toLocaleString() 
            : new Date(message.clientTimestamp).toLocaleString();
        
        // Render sync indicator
        let syncIndicatorHTML = '';
        if (message.syncStatus === 'pending' || message.syncStatus === 'syncing') {
            syncIndicatorHTML = '<span class="sync-indicator pending" title="Syncing..." aria-label="Message syncing with server">⏳</span>';
        } else if (message.syncStatus === 'failed') {
            syncIndicatorHTML = `
                <button class="sync-indicator failed retry-btn" 
                        onclick="retryMessage('${message.tempId}')" 
                        title="Sync failed. Click to retry."
                        aria-label="Sync failed. Click to retry sending message">
                    ⚠️ Retry
                </button>
            `;
        } else if (message.syncStatus === 'confirmed') {
            syncIndicatorHTML = '<span class="sync-indicator confirmed" title="Synced" aria-label="Message successfully synced">✓</span>';
        }
        
        messageDiv.innerHTML = `
            <div class="d-flex align-items-start">
                <div class="flex-grow-1">
                    <div class="fact-card p-2">
                        <div class="d-flex justify-content-between align-items-center">
                            <span class="flex-grow-1">${escapeHtml(message.content)}</span>
                            <div class="d-flex align-items-center ms-3">
                                ${syncIndicatorHTML}
                                <small class="text-muted ms-2 me-2" style="font-size: 0.75rem;">${timestamp}</small>
                                ${message.id ? `
                                <button type="button" 
                                        class="btn btn-sm btn-link text-danger p-0"
                                        onclick="deleteFact('${message.id}')"
                                        title="Delete fact">
                                    <i class="bi bi-trash" style="font-size: 0.875rem;"></i>
                                </button>
                                ` : ''}
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        `;
        
        container.appendChild(messageDiv);
    });
    
    // Auto-scroll to bottom
    container.scrollTop = container.scrollHeight;
}

// Helper: Escape HTML to prevent XSS
function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

// Retry failed message
async function retryMessage(tempId) {
    try {
        await messageCache.retryFailedMessage(tempId);
    } catch (error) {
        console.error('Error retrying message:', error);
        alert('Failed to retry. Please try again.');
    }
}

// T023: Listen to cache:message-added event and re-render
document.addEventListener('cache:message-added', (event) => {
    console.log('Message added:', event.detail);
    renderMessages();
});

// T024: Listen to cache:message-confirmed event and update indicator
document.addEventListener('cache:message-confirmed', (event) => {
    console.log('Message confirmed:', event.detail);
    renderMessages();
});

// Listen to cache:message-failed event
document.addEventListener('cache:message-failed', (event) => {
    console.log('Message failed:', event.detail);
    renderMessages();
});

// Initial render from cache on page load
{% if user_profile and user_profile.session_id %}
// Wait for DOM to be ready
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initializeFacts);
} else {
    initializeFacts();
}

// Load server-rendered facts into cache on first load
function initializeFacts() {
    const cache = messageCache.getCache();
    
    // Only load server facts if cache is empty (first visit)
    if (cache.confirmedMessages.length === 0) {
        {% if facts %}
        // Load existing facts from server into cache
        const serverFacts = [
            {% for fact in facts %}
            {
                id: '{{ fact.message_id }}',
                content: {{ fact.content|tojson }},
                role: 'user',
                type: 'fact',
                timestamp: '{{ fact.created_at }}',
                created_at: '{{ fact.created_at }}',
                syncStatus: 'confirmed'
            }{% if not loop.last %},{% endif %}
            {% endfor %}
        ];
        
        // Add to cache
        cache.confirmedMessages = serverFacts;
        cache.lastFetchTimestamp = new Date().toISOString();
        messageCache.saveCacheToBrowser();
        {% endif %}
    }
    
    // Now render from cache
    renderMessages();
}
{% endif %}
</script>
{% endblock %}