{% extends "base.html" %}

{% block title %}Admin | Rechnungsverwaltung{% endblock %}

{% block content %}
<section class="panel">
    <h1>Rechnungsverwaltung</h1>
    <p>Rechnungen fuer Nutzer erstellen, aktualisieren und loeschen.</p>
</section>

<section class="layout">
    <form method="post" class="form-card">
        <h3>Neue Rechnung</h3>
        <input type="hidden" name="action" value="create">
        <input type="text" name="username" placeholder="Benutzername" required>
        <input type="text" name="period" placeholder="Zeitraum (MM/YYYY)" required>
        <input type="text" name="amount_eur" placeholder="Betrag in EUR" required>
        <input type="text" name="due_date" placeholder="Faelligkeit (YYYY-MM-DD)">
        <input type="text" name="status" placeholder="Status (Offen, Bezahlt)">
        <button type="submit">Rechnung anlegen</button>
    </form>

    <div class="list">
        {% for item in invoices %}
        <article class="entry">
            <h3>{{ item.invoice_number }}</h3>
            <p><strong>Nutzer:</strong> {{ item.username }} | <strong>Zeitraum:</strong> {{ item.period }}</p>
            <p><strong>Betrag:</strong> {{ '%.2f'|format(item.amount_eur) }} EUR | <strong>Status:</strong> {{ item.status }} | <strong>Faellig:</strong> {{ item.due_date }}</p>
            <form method="post" class="inline-form">
                <input type="hidden" name="action" value="update">
                <input type="hidden" name="invoice_id" value="{{ item.id }}">
                <input type="text" name="amount_eur" value="{{ item.amount_eur }}" placeholder="Betrag">
                <input type="text" name="due_date" value="{{ item.due_date }}" placeholder="Faelligkeit">
                <input type="text" name="status" value="{{ item.status }}" placeholder="Status">
                <button type="submit">Aktualisieren</button>
            </form>
            <form method="post">
                <input type="hidden" name="action" value="delete">
                <input type="hidden" name="invoice_id" value="{{ item.id }}">
                <button type="submit" class="danger">Loeschen</button>
            </form>
        </article>
        {% else %}
        <article class="entry"><p>Noch keine Rechnungen vorhanden.</p></article>
        {% endfor %}
    </div>
</section>

<style>
.panel { margin-bottom: 1rem; }
.layout { display: grid; grid-template-columns: 320px 1fr; gap: 1rem; }
.form-card, .entry { background: #fff; border: 1px solid #d8e1e8; border-radius: 14px; padding: 1rem; }
.form-card { display: grid; gap: 0.6rem; align-self: start; }
.list { display: grid; gap: 0.8rem; }
.inline-form { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.45rem; margin-top: 0.6rem; }
input { width: 100%; border: 1px solid #c9d8e3; border-radius: 10px; padding: 0.52rem; font: inherit; }
button { border: 1px solid #0a4c74; background: linear-gradient(120deg, #0c5a86 0%, #08486c 100%); color: #fff; padding: 0.45rem 0.8rem; border-radius: 999px; font-weight: 700; }
button.danger { border-color: #d04a49; background: #fff; color: #922e2e; margin-top: 0.55rem; }
@media (max-width: 980px) { .layout { grid-template-columns: 1fr; } .inline-form { grid-template-columns: 1fr; } }
</style>
{% endblock %}