{% extends "base.html" %}

{% block title %}Kundenverwaltung{% endblock %}

{% macro sortable_header(label, field, current_sort, current_order) %}
<th>
    {% if current_sort == field %}
        <a href="{{ url_for('customers', sort=field, order='desc' if current_order == 'asc' else 'asc', search=search, page=1) }}" 
           class="server-sortable">
    {% else %}
        <a href="{{ url_for('customers', sort=field, order='asc', search=search, page=1) }}" 
           class="server-sortable">
    {% endif %}
        {{ label }}
        <span class="sort-indicator{% if current_sort == field %} active{% endif %}">
            {% if current_sort == field %}
                {% if current_order == 'asc' %}↑{% else %}↓{% endif %}
            {% else %}
                ↕
            {% endif %}
        </span>
    </a>
</th>
{% endmacro %}

{% block content %}
<div class="container py-5">
    <div class="d-flex justify-content-between align-items-center mb-4">
        <h2>Kundenverwaltung</h2>
        <div>
            <a href="/" class="btn btn-secondary">📊 Dashboard</a>
            <a href="/create" class="btn btn-primary">➕ Neue Lizenz</a>
            <a href="/batch" class="btn btn-primary">🔑 Batch-Lizenzen</a>
            <div class="btn-group">
                <button type="button" class="btn btn-info dropdown-toggle" data-bs-toggle="dropdown" aria-expanded="false">
                    📥 Export
                </button>
                <ul class="dropdown-menu">
                    <li><a class="dropdown-item" href="/export/customers?format=excel">📊 Excel (.xlsx)</a></li>
                    <li><a class="dropdown-item" href="/export/customers?format=csv">📄 CSV (.csv)</a></li>
                </ul>
            </div>
        </div>
    </div>

    <!-- Suchformular -->
    <div class="card mb-3">
        <div class="card-body">
            <form method="get" action="/customers" id="customerSearchForm" class="row g-3 align-items-end">
                <div class="col-md-10">
                    <label for="search" class="form-label">🔍 Suchen</label>
                    <input type="text" class="form-control" id="search" name="search" 
                           placeholder="Kundenname oder E-Mail..." 
                           value="{{ search }}" autofocus>
                </div>
                <div class="col-md-2">
                    <a href="/customers" class="btn btn-outline-secondary w-100">Zurücksetzen</a>
                </div>
            </form>
            {% if search %}
            <div class="mt-2">
                <small class="text-muted">Suchergebnisse für: <strong>{{ search }}</strong></small>
                <a href="/customers" class="btn btn-sm btn-outline-secondary ms-2">✖ Suche zurücksetzen</a>
            </div>
            {% endif %}
        </div>
    </div>

    <div class="card">
        <div class="card-body">
            <div class="table-responsive">
                <table class="table table-hover">
                    <thead>
                        <tr>
                            {{ sortable_header('ID', 'id', sort, order) }}
                            {{ sortable_header('Name', 'name', sort, order) }}
                            {{ sortable_header('E-Mail', 'email', sort, order) }}
                            {{ sortable_header('Erstellt am', 'created_at', sort, order) }}
                            {{ sortable_header('Lizenzen (Aktiv/Gesamt)', 'licenses', sort, order) }}
                            <th>Aktionen</th>
                        </tr>
                    </thead>
                    <tbody>
                        {% for customer in customers %}
                        <tr>
                            <td>{{ customer[0] }}</td>
                            <td>{{ customer[1] }}</td>
                            <td>{{ customer[2] or '-' }}</td>
                            <td>{{ customer[3].strftime('%d.%m.%Y %H:%M') }}</td>
                            <td>
                                <span class="badge bg-info">{{ customer[5] }}/{{ customer[4] }}</span>
                            </td>
                            <td>
                                <div class="btn-group btn-group-sm" role="group">
                                    <a href="/customer/edit/{{ customer[0] }}" class="btn btn-outline-primary">✏️ Bearbeiten</a>
                                    {% if customer[4] == 0 %}
                                    <form method="post" action="/customer/delete/{{ customer[0] }}" style="display: inline;" onsubmit="return confirm('Kunde wirklich löschen?');">
                                        <button type="submit" class="btn btn-outline-danger">🗑️ Löschen</button>
                                    </form>
                                    {% else %}
                                    <button class="btn btn-outline-danger" disabled title="Kunde hat Lizenzen">🗑️ Löschen</button>
                                    {% endif %}
                                </div>
                            </td>
                        </tr>
                        {% endfor %}
                    </tbody>
                </table>
                
                {% if not customers %}
                <div class="text-center py-5">
                    {% if search %}
                    <p class="text-muted">Keine Kunden gefunden für: <strong>{{ search }}</strong></p>
                    <a href="/customers" class="btn btn-secondary">Alle Kunden anzeigen</a>
                    {% else %}
                    <p class="text-muted">Noch keine Kunden vorhanden.</p>
                    <a href="/create" class="btn btn-primary">Erste Lizenz erstellen</a>
                    {% endif %}
                </div>
                {% endif %}
            </div>
            
            <!-- Pagination -->
            {% if total_pages > 1 %}
            <nav aria-label="Seitennavigation" class="mt-3">
                <ul class="pagination justify-content-center">
                    <!-- Erste Seite -->
                    <li class="page-item {% if page == 1 %}disabled{% endif %}">
                        <a class="page-link" href="{{ url_for('customers', page=1, search=search, sort=sort, order=order) }}">Erste</a>
                    </li>
                    
                    <!-- Vorherige Seite -->
                    <li class="page-item {% if page == 1 %}disabled{% endif %}">
                        <a class="page-link" href="{{ url_for('customers', page=page-1, search=search, sort=sort, order=order) }}">←</a>
                    </li>
                    
                    <!-- Seitenzahlen -->
                    {% for p in range(1, total_pages + 1) %}
                        {% if p >= page - 2 and p <= page + 2 %}
                        <li class="page-item {% if p == page %}active{% endif %}">
                            <a class="page-link" href="{{ url_for('customers', page=p, search=search, sort=sort, order=order) }}">{{ p }}</a>
                        </li>
                        {% endif %}
                    {% endfor %}
                    
                    <!-- Nächste Seite -->
                    <li class="page-item {% if page == total_pages %}disabled{% endif %}">
                        <a class="page-link" href="{{ url_for('customers', page=page+1, search=search, sort=sort, order=order) }}">→</a>
                    </li>
                    
                    <!-- Letzte Seite -->
                    <li class="page-item {% if page == total_pages %}disabled{% endif %}">
                        <a class="page-link" href="{{ url_for('customers', page=total_pages, search=search, sort=sort, order=order) }}">Letzte</a>
                    </li>
                </ul>
                <p class="text-center text-muted">
                    Seite {{ page }} von {{ total_pages }} | Gesamt: {{ total }} Kunden
                </p>
            </nav>
            {% endif %}
        </div>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script>
// Live Search für Kunden
document.addEventListener('DOMContentLoaded', function() {
    const searchForm = document.getElementById('customerSearchForm');
    const searchInput = document.getElementById('search');
    
    // Debounce timer für Suchfeld
    let searchTimeout;
    
    // Live-Suche mit 300ms Verzögerung
    searchInput.addEventListener('input', function() {
        clearTimeout(searchTimeout);
        searchTimeout = setTimeout(() => {
            searchForm.submit();
        }, 300);
    });
});
</script>
{% endblock %}