{% extends 'familytouch/base.html' %}

{% block extra_css %}
<style>
    .chat-container {
        max-width: 900px;
        margin: 2rem auto;
        padding: 0 1rem;
        height: 100vh;
        display: flex;
        flex-direction: column;
    }

    .chat-header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 1.5rem;
        border-radius: 12px 12px 0 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 0;
    }

    .chat-header h1 {
        margin: 0;
        font-size: 1.5rem;
    }

    .chat-header-back {
        text-decoration: none;
        color: white;
        padding: 0.5rem 1rem;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 8px;
        transition: all 0.3s ease;
        border: none;
        cursor: pointer;
        font-weight: 600;
    }

    .chat-header-back:hover {
        background: rgba(255, 255, 255, 0.3);
    }

    .messages-area {
        background: white;
        flex: 1;
        overflow-y: auto;
        padding: 1.5rem;
        border: 1px solid #e0e0e0;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .message {
        display: flex;
        margin-bottom: 1rem;
    }

    .message.sent {
        justify-content: flex-end;
    }

    .message-bubble {
        max-width: 60%;
        padding: 1rem;
        border-radius: 12px;
        line-height: 1.5;
        word-wrap: break-word;
    }

    .message.sent .message-bubble {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border-bottom-right-radius: 4px;
    }

    .message.received .message-bubble {
        background: #f0f0f0;
        color: #333;
        border-bottom-left-radius: 4px;
    }

    .message-time {
        font-size: 0.75rem;
        opacity: 0.7;
        margin-top: 0.25rem;
        padding: 0 0.5rem;
    }

    .no-messages {
        text-align: center;
        color: #999;
        margin: auto;
    }

    .no-messages-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
        opacity: 0.5;
    }

    .chat-input-area {
        background: white;
        padding: 1.5rem;
        border: 1px solid #e0e0e0;
        border-radius: 0 0 12px 12px;
        display: flex;
        gap: 1rem;
    }

    .chat-input-area form {
        display: flex;
        gap: 1rem;
        width: 100%;
    }

    .chat-input-area textarea {
        flex: 1;
        padding: 0.75rem;
        border: 1px solid #ddd;
        border-radius: 8px;
        resize: vertical;
        font-family: inherit;
        font-size: 1rem;
        max-height: 100px;
    }

    .chat-input-area textarea:focus {
        outline: none;
        border-color: #667eea;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }

    .chat-send-btn {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border: none;
        padding: 0.75rem 1.5rem;
        border-radius: 8px;
        font-weight: 700;
        cursor: pointer;
        transition: all 0.3s ease;
        white-space: nowrap;
        height: fit-content;
        align-self: flex-end;
    }

    .chat-send-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
    }

    .chat-send-btn:active {
        transform: translateY(0);
    }

    @media (max-width: 768px) {
        .message-bubble {
            max-width: 85%;
        }

        .chat-container {
            height: auto;
            margin: 0;
            padding: 0;
            border-radius: 0;
        }

        .chat-header {
            border-radius: 0;
            padding: 1rem;
            flex-direction: column;
            align-items: flex-start;
            gap: 0.75rem;
        }

        .chat-header h1 {
            font-size: 1.3rem;
        }

        .chat-header-back {
            align-self: flex-start;
            width: 100%;
        }

        .chat-input-area {
            border-radius: 0;
            padding: 1rem;
        }

        .messages-area {
            padding: 1rem;
        }

        .message {
            margin-bottom: 0.75rem;
        }

        .chat-input-area form {
            flex-direction: column;
        }

        .chat-input-area textarea {
            max-height: 80px;
        }

        .chat-send-btn {
            width: 100%;
        }
    }

    @media (max-width: 480px) {
        .chat-container {
            height: 100vh;
        }

        .chat-header {
            padding: 0.75rem;
        }

        .chat-header h1 {
            font-size: 1.1rem;
        }

        .chat-header-back {
            font-size: 0.9rem;
            padding: 0.5rem;
        }

        .messages-area {
            padding: 0.75rem;
        }

        .message-bubble {
            max-width: 90%;
            padding: 0.75rem;
            font-size: 0.95rem;
        }

        .message.sent .message-bubble {
            margin-left: auto;
        }

        .message.received .message-bubble {
            margin-right: auto;
        }

        .message-time {
            font-size: 0.7rem;
        }

        .chat-input-area {
            padding: 0.75rem;
            gap: 0.5rem;
        }

        .chat-input-area textarea {
            padding: 0.5rem;
            font-size: 0.95rem;
            max-height: 60px;
        }

        .chat-send-btn {
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
        }

        .no-messages {
            font-size: 0.9rem;
        }

        .no-messages-icon {
            font-size: 2rem;
        }
    }
</style>
{% endblock %}

{% block content %}
<div class="chat-container">
    <div class="chat-header">
        <h1>
            {% if other_user.profile.user_type == 'family' %}👪{% else %}👨‍⚕️{% endif %}
            {{ other_user.get_full_name|default:other_user.username }}
        </h1>
        <a href="{% url 'familytouch:messages' %}" class="chat-header-back">← Back to Messages</a>
    </div>

    <div class="messages-area" id="messagesArea">
        {% if chat_messages %}
            {% for msg in chat_messages %}
                <div class="message {% if msg.sender == user %}sent{% else %}received{% endif %}">
                    <div>
                        <div class="message-bubble">{{ msg.content }}</div>
                        <div class="message-time">{{ msg.created_at|date:"M d, H:i" }}</div>
                    </div>
                </div>
            {% endfor %}
        {% else %}
            <div class="no-messages">
                <div class="no-messages-icon">💬</div>
                <p>No messages yet. Start the conversation!</p>
            </div>
        {% endif %}
    </div>

    <div class="chat-input-area">
        <form method="post" id="chatForm">
            {% csrf_token %}
            <textarea name="content" id="messageInput" placeholder="Type your message..." required rows="2"></textarea>
            <button type="submit" class="chat-send-btn" id="sendBtn">📤 Send</button>
        </form>
    </div>
</div>

<script>
    // Auto-scroll to bottom on load
    const messagesArea = document.getElementById('messagesArea');
    if (messagesArea) {
        messagesArea.scrollTop = messagesArea.scrollHeight;
    }
    
    // Focus on input field
    const messageInput = document.getElementById('messageInput');
    if (messageInput) {
        messageInput.focus();
    }
    
    // Handle Enter key (Shift+Enter for new line, Enter to send)
    messageInput.addEventListener('keydown', function(e) {
        if (e.key === 'Enter' && !e.shiftKey) {
            e.preventDefault();
            document.getElementById('chatForm').submit();
        }
    });
    
    // Disable button while submitting
    const chatForm = document.getElementById('chatForm');
    const sendBtn = document.getElementById('sendBtn');
    
    chatForm.addEventListener('submit', function() {
        sendBtn.disabled = true;
        sendBtn.textContent = '⏳ Sending...';
    });
    
    // Auto-expand textarea
    messageInput.addEventListener('input', function() {
        this.style.height = 'auto';
        this.style.height = (this.scrollHeight) + 'px';
    });
</script>
{% endblock %}