<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>{{ page_title | default(value="Tera Test") }}</title>
    {% if include_styles %}
    <style>
        body {
            font-family: {{ font_family | default(value="sans-serif") }};
            color: #333;
            line-height: 1.6;
        }
        .container {
            width: 80%;
            margin: 0 auto;
        }
        {% if dark_mode %}
        body {
            background-color: #222;
            color: #eee;
        }
        {% endif %}
    </style>
    {% endif %}
</head>
<body>
    <div class="container">
        {# Header Section with variable interpolation #}
        <header>
            <h1>{{ header_text | upper }}</h1>
            {% if subheader %}
                <h2>{{ subheader }}</h2>
            {% endif %}
        </header>

        {# Navigation example with for loop #}
        <nav>
            <ul>
                {% for item in navigation %}
                    <li class="{{ loop.index0 == current_page ? 'active' : '' }}">
                        <a href="{{ item.url }}">{{ item.title }}</a>
                    </li>
                {% endfor %}
            </ul>
        </nav>

        {# Main content section with various template features #}
        <main>
            {# Conditionals #}
            {% if user %}
                <section class="welcome">
                    <h2>Welcome back, {{ user.name }}!</h2>
                    <p>Last login: {{ user.last_login | date(format="%Y-%m-%d") }}</p>
                </section>
            {% elif visitor_count > 0 %}
                <section class="welcome">
                    <h2>Welcome, visitor!</h2>
                    <p>You are visitor number {{ visitor_count }}</p>
                </section>
            {% else %}
                <section class="welcome">
                    <h2>Welcome to our site!</h2>
                </section>
            {% endif %}

            {# Macro definition and usage #}
            {% macro render_item(item, featured=false) %}
                <div class="item {{ featured ? 'featured' : '' }}">
                    <h3>{{ item.title }}</h3>
                    <p>{{ item.description | truncate(length=100) }}</p>
                    {% if item.tags %}
                        <div class="tags">
                            {% for tag in item.tags %}
                                <span class="tag">{{ tag }}</span>
                            {% endfor %}
                        </div>
                    {% endif %}
                </div>
            {% endmacro render_item %}

            {# Items section with macro usage #}
            <section class="items">
                <h2>Items ({{ items | length }})</h2>

                {% for item in items %}
                    {{ self::render_item(item=item, featured=item.id == featured_id) }}

                    {% if not loop.last %}
                        <hr>
                    {% endif %}
                {% endfor %}
            </section>

            {# Raw content that shouldn't be processed #}
            {% raw %}
                <div class="example">
                    The syntax {{ variable }} will not be processed in raw blocks.
                    Neither will {% control %} structures.
                </div>
            {% endraw %}

            {# Includes #}
            {% include "partials/footer.tera" %}

            {# Inheritance example #}
            {% block content %}
                <p>This is the default content.</p>
            {% endblock content %}

            {# Set variables #}
            {% set text_color = dark_mode ? "#fff" : "#333" %}
            {% set items_count = items | length %}

            <div style="color: {{ text_color }}">
                We have {{ items_count }} items.
            </div>

            {# Filters with complex expressions #}
            <p>{{ "Hello, " ~ user.name | default(value="Guest") | upper }}</p>
            <p>{{ items | filter(attribute="featured", value=true) | length }} featured items</p>

            {# With statement #}
            {% with %}
                {% set local_var = "Only visible in this scope" %}
                <p>{{ local_var }}</p>
            {% endwith %}

            {# Mathematical operations #}
            <div class="math">
                <p>Price: ${{ price }}</p>
                <p>Tax ({{ tax_rate * 100 }}%): ${{ price * tax_rate }}</p>
                <p>Total: ${{ price * (1 + tax_rate) }}</p>
            </div>

            {# Boolean operations #}
            {% if user and user.is_admin or super_user %}
                <div class="admin-panel">Admin panel</div>
            {% endif %}
        </main>

        {# Footer section with filters and includes #}
        <footer>
            <p>&copy; {{ current_year }} {{ company_name | default(value="Our Company") }}</p>

            {% if debug %}
                <div class="debug-info">
                    <p>Render time: {{ render_time }}ms</p>
                    <p>Template version: {{ version }}</p>
                </div>
            {% endif %}
        </footer>
    </div>

    <script>
        const appData = {
            "user": {% if user %}{{ user | json_encode() }}{% else %}null{% endif %},
            "settings": {
                "theme": "{{ theme | default(value="light") }}",
                "notifications": {{ notifications_enabled | string | lower }}
            }
        };
    </script>
</body>
</html>
