<?php
require_once __DIR__ . '/../src/config.php';
require_once __DIR__ . '/../src/auth.php';
require_once __DIR__ . '/../src/db.php';
require_once __DIR__ . '/../src/invoice_functions.php';
require_once __DIR__ . '/../src/journal_functions.php';
require_once __DIR__ . '/../src/icons.php';
require_login();

$settings = get_settings();
$msg = '';
$error = '';

// Aktiver Tab
$tab = $_GET['tab'] ?? 'allgemein';
$journal_sub = $_GET['jsub'] ?? 'jahre';

// ---- POST-Aktionen ----
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $form = $_POST['form'] ?? '';

    // === ALLGEMEIN TAB ===
    if ($form === 'allgemein') {
        $data = [
            'company_name'    => $_POST['company_name'] ?? '',
            'company_address' => $_POST['company_address'] ?? '',
            'company_zip'     => $_POST['company_zip'] ?? '',
            'company_city'    => $_POST['company_city'] ?? '',
            'company_country' => $_POST['company_country'] ?? '',
            'tax_id'          => $_POST['tax_id'] ?? '',
            'vat_mode'        => $_POST['vat_mode'] ?? 'klein',
            'default_vat_rate'=> $_POST['default_vat_rate'] ?? 19.0,
            'payment_terms'   => $_POST['payment_terms'] ?? '',
            'footer_text'     => $_POST['footer_text'] ?? '',
            'logo_path'       => $settings['logo_path'] ?? null,
            'iban'            => $_POST['iban'] ?? '',
            'phone'           => $_POST['phone'] ?? '',
            'email'           => $_POST['email'] ?? '',
            'website'         => $_POST['website'] ?? '',
        ];

        if (!empty($_FILES['logo']['tmp_name'])) {
            $targetDir = __DIR__ . '/uploads/';
            if (!is_dir($targetDir)) {
                mkdir($targetDir, 0775, true);
            }
            $targetFile = $targetDir . 'logo.png';
            if (move_uploaded_file($_FILES['logo']['tmp_name'], $targetFile)) {
                $data['logo_path'] = 'uploads/logo.png';
            }
        }

        save_settings($data);
        $settings = get_settings();
        $msg = 'Einstellungen gespeichert.';
    }
    
    // === JOURNAL TAB ===
    // Jahr erstellen
    if ($form === 'year') {
        $y = (int)($_POST['year'] ?? 0);
        if ($y >= 2000 && $y <= 2099) {
            $existing = get_journal_year_by_year($y);
            if ($existing) {
                $error = "Jahr $y existiert bereits.";
            } else {
                create_journal_year($y, $_POST['notes'] ?? '');
                $msg = "Jahr $y erstellt.";
            }
        } else {
            $error = 'Ungültiges Jahr.';
        }
        $tab = 'journal';
    }

    // Jahr öffnen/schließen
    if ($form === 'toggle_year') {
        $id = (int)($_POST['id'] ?? 0);
        if ($id) {
            toggle_journal_year_closed($id);
            $msg = 'Jahresstatus geändert.';
        }
        $tab = 'journal';
    }

    // Lieferant speichern
    if ($form === 'supplier') {
        $id = !empty($_POST['id']) ? (int)$_POST['id'] : null;
        $data = [
            'name' => $_POST['name'] ?? '',
            'sort_order' => $_POST['sort_order'] ?? 0,
            'is_active' => isset($_POST['is_active']),
        ];
        if ($data['name']) {
            save_journal_supplier($id, $data);
            $msg = 'Lieferant gespeichert.';
        } else {
            $error = 'Name ist Pflichtfeld.';
        }
        $tab = 'journal';
    }

    // Lieferant löschen
    if ($form === 'delete_supplier') {
        delete_journal_supplier((int)$_POST['id']);
        $msg = 'Lieferant gelöscht.';
        $tab = 'journal';
    }

    // Wareneingang-Kategorie speichern
    if ($form === 'rev_cat') {
        $id = !empty($_POST['id']) ? (int)$_POST['id'] : null;
        $data = [
            'name' => $_POST['name'] ?? '',
            'category_type' => $_POST['category_type'] ?? 'wareneingang',
            'vat_rate' => $_POST['vat_rate'] ?? 19,
            'sort_order' => $_POST['sort_order'] ?? 0,
            'is_active' => isset($_POST['is_active']),
        ];
        if ($data['name']) {
            save_journal_revenue_category($id, $data);
            $msg = 'Kategorie gespeichert.';
        } else {
            $error = 'Name ist Pflichtfeld.';
        }
        $tab = 'journal';
    }

    // Wareneingang-/Erlös-Kategorie löschen
    if ($form === 'delete_rev_cat') {
        delete_journal_revenue_category((int)$_POST['id']);
        $msg = 'Kategorie gelöscht.';
        $tab = 'journal';
    }

    // Aufwandskategorie speichern
    if ($form === 'exp_cat') {
        $id = !empty($_POST['id']) ? (int)$_POST['id'] : null;
        $data = [
            'name' => $_POST['name'] ?? '',
            'side' => $_POST['side'] ?? 'soll',
            'sort_order' => $_POST['sort_order'] ?? 0,
            'is_active' => isset($_POST['is_active']),
        ];
        if ($data['name']) {
            save_journal_expense_category($id, $data);
            $msg = 'Aufwandskategorie gespeichert.';
        } else {
            $error = 'Name ist Pflichtfeld.';
        }
        $tab = 'journal';
    }

    // Aufwandskategorie löschen
    if ($form === 'delete_exp_cat') {
        delete_journal_expense_category((int)$_POST['id']);
        $msg = 'Aufwandskategorie gelöscht.';
        $tab = 'journal';
    }

    // Abzug speichern
    if ($form === 'ded_cat') {
        $id = !empty($_POST['id']) ? (int)$_POST['id'] : null;
        $data = [
            'name' => $_POST['name'] ?? '',
            'sort_order' => $_POST['sort_order'] ?? 0,
            'is_active' => isset($_POST['is_active']),
        ];
        if ($data['name']) {
            save_journal_deduction_category($id, $data);
            $msg = 'Abzug gespeichert.';
        } else {
            $error = 'Name ist Pflichtfeld.';
        }
        $tab = 'journal';
    }

    // Abzug löschen
    if ($form === 'delete_ded_cat') {
        delete_journal_deduction_category((int)$_POST['id']);
        $msg = 'Abzug gelöscht.';
        $tab = 'journal';
    }

    // Zusammenfassungsposten speichern
    if ($form === 'summary_item') {
        $id = !empty($_POST['id']) ? (int)$_POST['id'] : null;
        $data = [
            'name' => $_POST['name'] ?? '',
            'sort_order' => $_POST['sort_order'] ?? 0,
            'is_active' => isset($_POST['is_active']),
        ];
        if ($data['name']) {
            save_journal_summary_item($id, $data);
            $msg = 'Posten gespeichert.';
        } else {
            $error = 'Name ist Pflichtfeld.';
        }
        $tab = 'journal';
    }

    // Zusammenfassungsposten löschen
    if ($form === 'delete_summary_item') {
        delete_journal_summary_item((int)$_POST['id']);
        $msg = 'Posten gelöscht.';
        $tab = 'journal';
    }

    // === KONTO TAB ===
    // Benutzername ändern
    if ($form === 'change_username') {
        $new_username = trim($_POST['new_username'] ?? '');
        if (strlen($new_username) < 3) {
            $error = 'Benutzername muss mindestens 3 Zeichen haben.';
        } elseif (!update_username($_SESSION['user_id'], $new_username)) {
            $error = 'Benutzername existiert bereits.';
        } else {
            $msg = 'Benutzername geändert.';
        }
        $tab = 'konto';
    }

    // Passwort ändern
    if ($form === 'change_password') {
        $current_pw = $_POST['current_password'] ?? '';
        $new_pw = $_POST['new_password'] ?? '';
        $confirm_pw = $_POST['confirm_password'] ?? '';
        if (strlen($new_pw) < 6) {
            $error = 'Neues Passwort muss mindestens 6 Zeichen haben.';
        } elseif ($new_pw !== $confirm_pw) {
            $error = 'Passwörter stimmen nicht überein.';
        } elseif (!update_password($_SESSION['user_id'], $current_pw, $new_pw)) {
            $error = 'Aktuelles Passwort ist falsch.';
        } else {
            $msg = 'Passwort geändert.';
        }
        $tab = 'konto';
    }
}

// Journal-Daten laden
$years = get_journal_years();
$suppliers = get_journal_suppliers();
$we_cats = get_journal_revenue_categories('wareneingang');
$er_cats = get_journal_revenue_categories('erloese');
$exp_cats = get_journal_expense_categories();
$ded_cats = get_journal_deduction_categories();
$summary_items = get_journal_summary_items();
?>
<!doctype html>
<html lang="de">
<head>
    <meta charset="utf-8">
    <title>Einstellungen</title>
    <link rel="stylesheet" href="assets/style.css">
</head>
<body>
<header>
    <h1>PIRP</h1>
    <nav>
        <a href="<?= url_for('index.php') ?>"><?= icon_dashboard() ?>Dashboard</a>
        <a href="<?= url_for('invoices.php') ?>"><?= icon_invoices() ?>Rechnungen</a>
        <a href="<?= url_for('customers.php') ?>"><?= icon_customers() ?>Kunden</a>
        <a href="<?= url_for('expenses.php') ?>"><?= icon_expenses() ?>Ausgaben</a>
        <a href="<?= url_for('belegarchiv.php') ?>"><?= icon_archive() ?>Belege</a>
        <a href="<?= url_for('journal.php') ?>"><?= icon_journal() ?>Journal</a>
        <a href="<?= url_for('euer.php') ?>"><?= icon_euer() ?>EÜR</a>
        <a href="<?= url_for('settings.php') ?>" class="active"><?= icon_settings() ?>Einstellungen</a>
        <a href="<?= url_for('logout.php') ?>"><?= icon_logout() ?>Logout (<?= htmlspecialchars($_SESSION['username'] ?? '') ?>)</a>
        <span class="cmd-k-hint" onclick="document.dispatchEvent(new KeyboardEvent('keydown',{key:'k',ctrlKey:true}))"><kbd>Ctrl+K</kbd></span>
    </nav>
</header>
<main>
    <!-- Tab-Navigation -->
    <div class="settings-tabs">
        <a href="<?= url_for('settings.php?tab=allgemein') ?>" class="<?= $tab === 'allgemein' ? 'active' : '' ?>">Allgemein</a>
        <a href="<?= url_for('settings.php?tab=journal') ?>" class="<?= $tab === 'journal' ? 'active' : '' ?>">Journal</a>
        <a href="<?= url_for('settings.php?tab=konto') ?>" class="<?= $tab === 'konto' ? 'active' : '' ?>">Konto</a>
    </div>

    <?php if ($msg): ?><p class="success"><?= htmlspecialchars($msg) ?></p><?php endif; ?>
    <?php if ($error): ?><p class="error"><?= htmlspecialchars($error) ?></p><?php endif; ?>

    <?php if ($tab === 'allgemein'): ?>
    <!-- ==================== ALLGEMEIN TAB ==================== -->
    <section>
        <h2>Firmeneinstellungen</h2>
        <form method="post" enctype="multipart/form-data">
            <input type="hidden" name="form" value="allgemein">
            <label>Firmenname:
                <input type="text" name="company_name" value="<?= htmlspecialchars($settings['company_name'] ?? '') ?>">
            </label>

            <label>Adresse (mehrzeilig):
                <textarea name="company_address" rows="3"><?= htmlspecialchars($settings['company_address'] ?? '') ?></textarea>
            </label>

            <div class="flex-row">
                <label>PLZ:
                    <input type="text" name="company_zip" value="<?= htmlspecialchars($settings['company_zip'] ?? '') ?>">
                </label>
                <label>Ort:
                    <input type="text" name="company_city" value="<?= htmlspecialchars($settings['company_city'] ?? '') ?>">
                </label>
                <label>Land:
                    <input type="text" name="company_country" value="<?= htmlspecialchars($settings['company_country'] ?? '') ?>">
                </label>
            </div>

            <label>Steuernummer/USt-IdNr:
                <input type="text" name="tax_id" value="<?= htmlspecialchars($settings['tax_id'] ?? '') ?>">
            </label>

            <label>Umsatzsteuer-Modus:
                <select name="vat_mode">
                    <option value="klein" <?= ($settings['vat_mode'] ?? '') === 'klein' ? 'selected' : '' ?>>Kleinunternehmer</option>
                    <option value="normal" <?= ($settings['vat_mode'] ?? '') === 'normal' ? 'selected' : '' ?>>Normal</option>
                </select>
            </label>

            <label>Standard-USt-Satz (%):
                <input type="number" step="0.01" name="default_vat_rate" value="<?= htmlspecialchars($settings['default_vat_rate'] ?? '19.00') ?>">
            </label>

            <label>IBAN:
                <input type="text" name="iban" value="<?= htmlspecialchars($settings['iban'] ?? '') ?>">
            </label>

            <label>Telefon:
                <input type="text" name="phone" value="<?= htmlspecialchars($settings['phone'] ?? '') ?>">
            </label>

            <label>E-Mail:
                <input type="email" name="email" value="<?= htmlspecialchars($settings['email'] ?? '') ?>">
            </label>

            <label>Website:
                <input type="text" name="website" value="<?= htmlspecialchars($settings['website'] ?? '') ?>">
            </label>

            <label>Zahlungsbedingungen:
                <textarea name="payment_terms" rows="2"><?= htmlspecialchars($settings['payment_terms'] ?? '') ?></textarea>
            </label>

            <label>Fußtext:
                <textarea name="footer_text" rows="2"><?= htmlspecialchars($settings['footer_text'] ?? '') ?></textarea>
            </label>

            <label>Logo (PNG):
                <input type="file" name="logo" accept="image/png">
            </label>
            <?php if (!empty($settings['logo_path'])): ?>
                <p>Aktuelles Logo:<br>
                    <img src="<?= htmlspecialchars($settings['logo_path']) ?>" style="max-height:60px;"></p>
            <?php endif; ?>

            <button type="submit">Speichern</button>
        </form>
    </section>

    <?php elseif ($tab === 'journal'): ?>
    <!-- ==================== JOURNAL TAB ==================== -->

    <!-- Journal Sub-Tabs -->
    <div class="journal-settings-subtabs">
        <a href="<?= url_for('settings.php?tab=journal&jsub=jahre') ?>" class="<?= $journal_sub === 'jahre' ? 'active' : '' ?>">Jahre</a>
        <a href="<?= url_for('settings.php?tab=journal&jsub=einnahmen') ?>" class="<?= $journal_sub === 'einnahmen' ? 'active' : '' ?>">Einnahmen</a>
        <a href="<?= url_for('settings.php?tab=journal&jsub=ausgaben') ?>" class="<?= $journal_sub === 'ausgaben' ? 'active' : '' ?>">Ausgaben</a>
        <a href="<?= url_for('settings.php?tab=journal&jsub=stammdaten') ?>" class="<?= $journal_sub === 'stammdaten' ? 'active' : '' ?>">Sonstiges</a>
    </div>

    <?php if ($journal_sub === 'jahre'): ?>
    <!-- ========== JAHRE ========== -->
    <section>
        <h2>Journal-Jahre</h2>
        <p class="settings-help">Hier verwalten Sie die Buchungsjahre. Ein geschlossenes Jahr kann nicht mehr bearbeitet werden.</p>
        <div>
            <form method="post" class="flex-row" style="margin-bottom:12px;">
                <input type="hidden" name="form" value="year">
                <label>Jahr:
                    <input type="number" name="year" value="<?= date('Y') ?>" min="2000" max="2099" required style="max-width:100px;">
                </label>
                <label>Notizen:
                    <input type="text" name="notes" value="">
                </label>
                <label>&nbsp;
                    <button type="submit">Jahr erstellen</button>
                </label>
            </form>
            <?php if ($years): ?>
            <table class="list">
                <thead><tr><th>Jahr</th><th>Status</th><th>Notizen</th><th>Aktion</th></tr></thead>
                <tbody>
                <?php foreach ($years as $y): ?>
                <tr>
                    <td><strong><?= (int)$y['year'] ?></strong></td>
                    <td><?= $y['is_closed'] ? '<span class="badge badge-danger">Geschlossen</span>' : '<span class="badge badge-success">Offen</span>' ?></td>
                    <td><?= htmlspecialchars($y['notes'] ?? '') ?></td>
                    <td>
                        <form method="post" style="display:inline;">
                            <input type="hidden" name="form" value="toggle_year">
                            <input type="hidden" name="id" value="<?= $y['id'] ?>">
                            <button type="submit" class="secondary" style="padding:3px 8px;font-size:10px;">
                                <?= $y['is_closed'] ? 'Öffnen' : 'Schließen' ?>
                            </button>
                        </form>
                        <a href="<?= url_for('journal.php?year_id=' . $y['id']) ?>" style="margin-left:6px;font-size:10px;">Zum Journal</a>
                    </td>
                </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
            <?php else: ?>
            <p class="info">Noch keine Jahre angelegt. Erstellen Sie ein Jahr, um mit der Buchführung zu beginnen.</p>
            <?php endif; ?>
        </div>
    </section>

    <?php elseif ($journal_sub === 'einnahmen'): ?>
    <!-- ========== EINNAHMEN ========== -->

    <!-- Erlös-Kategorien -->
    <section>
        <h2>Erlös-Kategorien</h2>
        <p class="settings-help">Kategorien für Einnahmen/Erlöse (z.B. "Umsatz 7%", "Umsatz 19%"). Diese erscheinen als Spalten im Journal.</p>
        <div>
            <form method="post" class="flex-row" style="margin-bottom:12px;">
                <input type="hidden" name="form" value="rev_cat">
                <input type="hidden" name="category_type" value="erloese">
                <label>Name:
                    <input type="text" name="name" required placeholder="z.B. Umsatz 19%">
                </label>
                <label>MwSt %:
                    <input type="number" step="0.01" name="vat_rate" value="19" style="max-width:80px;">
                </label>
                <label>Sort.:
                    <input type="number" name="sort_order" value="0" style="max-width:60px;">
                </label>
                <label>
                    <input type="checkbox" name="is_active" checked> Aktiv
                </label>
                <label>&nbsp;
                    <button type="submit">Hinzufügen</button>
                </label>
            </form>
            <?php if ($er_cats): ?>
            <table class="list">
                <thead><tr><th>Name</th><th>MwSt</th><th>Sort.</th><th>Aktiv</th><th>Aktion</th></tr></thead>
                <tbody>
                <?php foreach ($er_cats as $cat): ?>
                <tr>
                    <td>
                        <form method="post" style="display:inline;" class="flex-row">
                            <input type="hidden" name="form" value="rev_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <input type="hidden" name="category_type" value="erloese">
                            <input type="text" name="name" value="<?= htmlspecialchars($cat['name']) ?>" style="max-width:150px;">
                    </td>
                    <td><input type="number" step="0.01" name="vat_rate" value="<?= htmlspecialchars($cat['vat_rate']) ?>" style="max-width:70px;"></td>
                    <td><input type="number" name="sort_order" value="<?= (int)$cat['sort_order'] ?>" style="max-width:50px;"></td>
                    <td><input type="checkbox" name="is_active" <?= $cat['is_active'] ? 'checked' : '' ?>></td>
                    <td>
                            <button type="submit" class="secondary" style="padding:3px 8px;font-size:10px;">Speichern</button>
                        </form>
                        <form method="post" style="display:inline;">
                            <input type="hidden" name="form" value="delete_rev_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <button type="submit" class="danger" style="padding:3px 8px;font-size:10px;" onclick="return confirm('Wirklich löschen?');">X</button>
                        </form>
                    </td>
                </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
            <?php endif; ?>
        </div>
    </section>

    <!-- Wareneingang-Kategorien -->
    <section>
        <h2>Wareneingang-Kategorien</h2>
        <p class="settings-help">Kategorien für Wareneinkauf (z.B. "WE 7%", "WE 19%"). Diese erscheinen als Spalten im Journal.</p>
        <div>
            <form method="post" class="flex-row" style="margin-bottom:12px;">
                <input type="hidden" name="form" value="rev_cat">
                <input type="hidden" name="category_type" value="wareneingang">
                <label>Name:
                    <input type="text" name="name" required placeholder="z.B. WE 19%">
                </label>
                <label>MwSt %:
                    <input type="number" step="0.01" name="vat_rate" value="19" style="max-width:80px;">
                </label>
                <label>Sort.:
                    <input type="number" name="sort_order" value="0" style="max-width:60px;">
                </label>
                <label>
                    <input type="checkbox" name="is_active" checked> Aktiv
                </label>
                <label>&nbsp;
                    <button type="submit">Hinzufügen</button>
                </label>
            </form>
            <?php if ($we_cats): ?>
            <table class="list">
                <thead><tr><th>Name</th><th>MwSt</th><th>Sort.</th><th>Aktiv</th><th>Aktion</th></tr></thead>
                <tbody>
                <?php foreach ($we_cats as $cat): ?>
                <tr>
                    <td>
                        <form method="post" style="display:inline;" class="flex-row">
                            <input type="hidden" name="form" value="rev_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <input type="hidden" name="category_type" value="wareneingang">
                            <input type="text" name="name" value="<?= htmlspecialchars($cat['name']) ?>" style="max-width:150px;">
                    </td>
                    <td><input type="number" step="0.01" name="vat_rate" value="<?= htmlspecialchars($cat['vat_rate']) ?>" style="max-width:70px;"></td>
                    <td><input type="number" name="sort_order" value="<?= (int)$cat['sort_order'] ?>" style="max-width:50px;"></td>
                    <td><input type="checkbox" name="is_active" <?= $cat['is_active'] ? 'checked' : '' ?>></td>
                    <td>
                            <button type="submit" class="secondary" style="padding:3px 8px;font-size:10px;">Speichern</button>
                        </form>
                        <form method="post" style="display:inline;">
                            <input type="hidden" name="form" value="delete_rev_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <button type="submit" class="danger" style="padding:3px 8px;font-size:10px;" onclick="return confirm('Wirklich löschen?');">X</button>
                        </form>
                    </td>
                </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
            <?php endif; ?>
        </div>
    </section>

    <?php elseif ($journal_sub === 'ausgaben'): ?>
    <!-- ========== AUSGABEN / ABZÜGE ========== -->

    <!-- Aufwandskategorien -->
    <section>
        <h2>Aufwandskategorien</h2>
        <p class="settings-help">Kategorien für Betriebsausgaben (z.B. "Miete", "Versicherung", "Telefon"). Diese erscheinen als Spalten im Journal und werden in der EÜR berücksichtigt.</p>
        <div>
            <form method="post" class="flex-row" style="margin-bottom:12px;">
                <input type="hidden" name="form" value="exp_cat">
                <label>Name:
                    <input type="text" name="name" required placeholder="z.B. Miete">
                </label>
                <label>Typ:
                    <select name="side" style="max-width:120px;">
                        <option value="soll">Soll</option>
                        <option value="soll_haben">Soll+Haben</option>
                    </select>
                </label>
                <label>Sort.:
                    <input type="number" name="sort_order" value="0" style="max-width:60px;">
                </label>
                <label>
                    <input type="checkbox" name="is_active" checked> Aktiv
                </label>
                <label>&nbsp;
                    <button type="submit">Hinzufügen</button>
                </label>
            </form>
            <?php if ($exp_cats): ?>
            <table class="list">
                <thead><tr><th>Name</th><th>Typ</th><th>Sort.</th><th>Aktiv</th><th>Aktion</th></tr></thead>
                <tbody>
                <?php foreach ($exp_cats as $cat): ?>
                <tr>
                    <td>
                        <form method="post" style="display:inline;" class="flex-row">
                            <input type="hidden" name="form" value="exp_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <input type="text" name="name" value="<?= htmlspecialchars($cat['name']) ?>" style="max-width:150px;">
                    </td>
                    <td>
                        <select name="side" style="max-width:100px;">
                            <option value="soll" <?= $cat['side'] === 'soll' ? 'selected' : '' ?>>Soll</option>
                            <option value="soll_haben" <?= $cat['side'] === 'soll_haben' ? 'selected' : '' ?>>Soll+Haben</option>
                        </select>
                    </td>
                    <td><input type="number" name="sort_order" value="<?= (int)$cat['sort_order'] ?>" style="max-width:50px;"></td>
                    <td><input type="checkbox" name="is_active" <?= $cat['is_active'] ? 'checked' : '' ?>></td>
                    <td>
                            <button type="submit" class="secondary" style="padding:3px 8px;font-size:10px;">Speichern</button>
                        </form>
                        <form method="post" style="display:inline;">
                            <input type="hidden" name="form" value="delete_exp_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <button type="submit" class="danger" style="padding:3px 8px;font-size:10px;" onclick="return confirm('Wirklich löschen?');">X</button>
                        </form>
                    </td>
                </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
            <?php endif; ?>
        </div>
    </section>

    <!-- Abzüge -->
    <section>
        <h2>Abzüge</h2>
        <p class="settings-help">Abzugskategorien (z.B. "Skonto", "Lotto"). Diese erscheinen als Haben-Spalten im Journal und werden in der EÜR berücksichtigt.</p>
        <div>
            <form method="post" class="flex-row" style="margin-bottom:12px;">
                <input type="hidden" name="form" value="ded_cat">
                <label>Name:
                    <input type="text" name="name" required placeholder="z.B. Skonto">
                </label>
                <label>Sort.:
                    <input type="number" name="sort_order" value="0" style="max-width:60px;">
                </label>
                <label>
                    <input type="checkbox" name="is_active" checked> Aktiv
                </label>
                <label>&nbsp;
                    <button type="submit">Hinzufügen</button>
                </label>
            </form>
            <?php if ($ded_cats): ?>
            <table class="list">
                <thead><tr><th>Name</th><th>Sort.</th><th>Aktiv</th><th>Aktion</th></tr></thead>
                <tbody>
                <?php foreach ($ded_cats as $cat): ?>
                <tr>
                    <td>
                        <form method="post" style="display:inline;" class="flex-row">
                            <input type="hidden" name="form" value="ded_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <input type="text" name="name" value="<?= htmlspecialchars($cat['name']) ?>" style="max-width:200px;">
                    </td>
                    <td><input type="number" name="sort_order" value="<?= (int)$cat['sort_order'] ?>" style="max-width:50px;"></td>
                    <td><input type="checkbox" name="is_active" <?= $cat['is_active'] ? 'checked' : '' ?>></td>
                    <td>
                            <button type="submit" class="secondary" style="padding:3px 8px;font-size:10px;">Speichern</button>
                        </form>
                        <form method="post" style="display:inline;">
                            <input type="hidden" name="form" value="delete_ded_cat">
                            <input type="hidden" name="id" value="<?= $cat['id'] ?>">
                            <button type="submit" class="danger" style="padding:3px 8px;font-size:10px;" onclick="return confirm('Wirklich löschen?');">X</button>
                        </form>
                    </td>
                </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
            <?php endif; ?>
        </div>
    </section>

    <?php elseif ($journal_sub === 'stammdaten'): ?>
    <!-- ========== STAMMDATEN ========== -->

    <!-- Lieferanten -->
    <section>
        <h2>Lieferanten</h2>
        <p class="settings-help">Lieferanten können bei Buchungen ausgewählt werden, um die Zuordnung zu erleichtern.</p>
        <div>
            <form method="post" class="flex-row" style="margin-bottom:12px;">
                <input type="hidden" name="form" value="supplier">
                <label>Name:
                    <input type="text" name="name" required placeholder="z.B. Metro">
                </label>
                <label>Sort.:
                    <input type="number" name="sort_order" value="0" style="max-width:60px;">
                </label>
                <label>
                    <input type="checkbox" name="is_active" checked> Aktiv
                </label>
                <label>&nbsp;
                    <button type="submit">Hinzufügen</button>
                </label>
            </form>
            <?php if ($suppliers): ?>
            <table class="list">
                <thead><tr><th>Name</th><th>Sort.</th><th>Aktiv</th><th>Aktion</th></tr></thead>
                <tbody>
                <?php foreach ($suppliers as $sup): ?>
                <tr>
                    <td>
                        <form method="post" style="display:inline;" class="flex-row">
                            <input type="hidden" name="form" value="supplier">
                            <input type="hidden" name="id" value="<?= $sup['id'] ?>">
                            <input type="text" name="name" value="<?= htmlspecialchars($sup['name']) ?>" style="max-width:200px;">
                    </td>
                    <td><input type="number" name="sort_order" value="<?= (int)$sup['sort_order'] ?>" style="max-width:50px;"></td>
                    <td><input type="checkbox" name="is_active" <?= $sup['is_active'] ? 'checked' : '' ?>></td>
                    <td>
                            <button type="submit" class="secondary" style="padding:3px 8px;font-size:10px;">Speichern</button>
                        </form>
                        <form method="post" style="display:inline;">
                            <input type="hidden" name="form" value="delete_supplier">
                            <input type="hidden" name="id" value="<?= $sup['id'] ?>">
                            <button type="submit" class="danger" style="padding:3px 8px;font-size:10px;" onclick="return confirm('Wirklich löschen?');">X</button>
                        </form>
                    </td>
                </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
            <?php endif; ?>
        </div>
    </section>

    <!-- Umsatz-Zusammenfassungsposten -->
    <section>
        <h2>Umsatz-Zusammenfassungsposten</h2>
        <p class="settings-help">Zusätzliche Posten für die monatliche Umsatzübersicht im Journal (z.B. "Reinigung", "RMV").</p>
        <div>
            <form method="post" class="flex-row" style="margin-bottom:12px;">
                <input type="hidden" name="form" value="summary_item">
                <label>Name:
                    <input type="text" name="name" required placeholder="z.B. Reinigung">
                </label>
                <label>Sort.:
                    <input type="number" name="sort_order" value="0" style="max-width:60px;">
                </label>
                <label>
                    <input type="checkbox" name="is_active" checked> Aktiv
                </label>
                <label>&nbsp;
                    <button type="submit">Hinzufügen</button>
                </label>
            </form>
            <?php if ($summary_items): ?>
            <table class="list">
                <thead><tr><th>Name</th><th>Sort.</th><th>Aktiv</th><th>Aktion</th></tr></thead>
                <tbody>
                <?php foreach ($summary_items as $item): ?>
                <tr>
                    <td>
                        <form method="post" style="display:inline;" class="flex-row">
                            <input type="hidden" name="form" value="summary_item">
                            <input type="hidden" name="id" value="<?= $item['id'] ?>">
                            <input type="text" name="name" value="<?= htmlspecialchars($item['name']) ?>" style="max-width:200px;">
                    </td>
                    <td><input type="number" name="sort_order" value="<?= (int)$item['sort_order'] ?>" style="max-width:50px;"></td>
                    <td><input type="checkbox" name="is_active" <?= $item['is_active'] ? 'checked' : '' ?>></td>
                    <td>
                            <button type="submit" class="secondary" style="padding:3px 8px;font-size:10px;">Speichern</button>
                        </form>
                        <form method="post" style="display:inline;">
                            <input type="hidden" name="form" value="delete_summary_item">
                            <input type="hidden" name="id" value="<?= $item['id'] ?>">
                            <button type="submit" class="danger" style="padding:3px 8px;font-size:10px;" onclick="return confirm('Wirklich löschen?');">X</button>
                        </form>
                    </td>
                </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
            <?php endif; ?>
        </div>
    </section>
    <?php endif; ?>

    <?php elseif ($tab === 'konto'): ?>
    <!-- ==================== KONTO TAB ==================== -->
    <?php $current_user = get_logged_in_user(); ?>

    <section>
        <h2>Benutzername ändern</h2>
        <div>
            <form method="post">
                <input type="hidden" name="form" value="change_username">
                <label>Aktueller Benutzername:
                    <input type="text" value="<?= htmlspecialchars($current_user['username'] ?? '') ?>" disabled>
                </label>
                <label>Neuer Benutzername:
                    <input type="text" name="new_username" required minlength="3" style="max-width:300px;">
                </label>
                <button type="submit">Benutzername ändern</button>
            </form>
        </div>
    </section>

    <section>
        <h2>Passwort ändern</h2>
        <div>
            <form method="post">
                <input type="hidden" name="form" value="change_password">
                <label>Aktuelles Passwort:
                    <input type="password" name="current_password" required style="max-width:300px;">
                </label>
                <label>Neues Passwort:
                    <input type="password" name="new_password" required minlength="6" style="max-width:300px;">
                </label>
                <label>Neues Passwort bestätigen:
                    <input type="password" name="confirm_password" required minlength="6" style="max-width:300px;">
                </label>
                <button type="submit">Passwort ändern</button>
            </form>
        </div>
    </section>

    <?php endif; ?>
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