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

$pdo = get_db();

$filter_type   = $_GET['type']       ?? 'all';    // all | rechnung | ausgabe | mahnung
$filter_from   = trim($_GET['from']  ?? '');
$filter_to     = trim($_GET['to']    ?? '');
$filter_q      = trim($_GET['q']     ?? '');
$invoice_id    = isset($_GET['invoice_id']) ? (int)$_GET['invoice_id'] : 0;

$belege = [];

// ---- Rechnungs-PDFs ----
if ($filter_type === 'all' || $filter_type === 'rechnung') {
    $base = "FROM invoices i JOIN customers c ON c.id = i.customer_id WHERE i.pdf_path IS NOT NULL";
    $params = [];
    if ($filter_from) { $base .= " AND i.invoice_date >= :from"; $params[':from'] = $filter_from; }
    if ($filter_to)   { $base .= " AND i.invoice_date <= :to";   $params[':to']   = $filter_to;   }
    if ($filter_q)    { $base .= " AND (i.invoice_number ILIKE :q OR c.name ILIKE :q2)";
                        $params[':q'] = '%' . $filter_q . '%'; $params[':q2'] = '%' . $filter_q . '%'; }
    try {
        $sql = "SELECT i.id, i.invoice_date AS beleg_date, i.invoice_number AS beleg_ref,
                       c.name AS kunde, i.total_gross AS betrag, i.pdf_path,
                       'rechnung' AS beleg_type, COALESCE(i.is_storno, FALSE) AS is_storno $base";
        $stmt = $pdo->prepare($sql);
        $stmt->execute($params);
    } catch (\PDOException $e) {
        // is_storno Spalte noch nicht migriert — Fallback ohne die Spalte
        $sql = "SELECT i.id, i.invoice_date AS beleg_date, i.invoice_number AS beleg_ref,
                       c.name AS kunde, i.total_gross AS betrag, i.pdf_path,
                       'rechnung' AS beleg_type, FALSE AS is_storno $base";
        $stmt = $pdo->prepare($sql);
        $stmt->execute($params);
    }
    $belege = array_merge($belege, $stmt->fetchAll(PDO::FETCH_ASSOC));
}

// ---- Ausgaben-Belege ----
if ($filter_type === 'all' || $filter_type === 'ausgabe') {
    $sql = "SELECT e.id, e.expense_date AS beleg_date, e.description AS beleg_ref,
                   '' AS kunde, e.amount AS betrag, e.attachment_path AS pdf_path,
                   'ausgabe' AS beleg_type, FALSE AS is_storno
            FROM expenses e
            WHERE e.attachment_path IS NOT NULL";
    $params = [];
    if ($filter_from) { $sql .= " AND e.expense_date >= :from"; $params[':from'] = $filter_from; }
    if ($filter_to)   { $sql .= " AND e.expense_date <= :to";   $params[':to']   = $filter_to;   }
    if ($filter_q)    { $sql .= " AND e.description ILIKE :q";  $params[':q']    = '%' . $filter_q . '%'; }
    $stmt = $pdo->prepare($sql);
    $stmt->execute($params);
    $belege = array_merge($belege, $stmt->fetchAll(PDO::FETCH_ASSOC));
}

// ---- Mahnungen ----
$show_mahnungen = ($filter_type === 'all' || $filter_type === 'mahnung');
if ($show_mahnungen) {
    $sql = "SELECT m.id, m.mahnung_date AS beleg_date,
                   'MAHNUNG L' || m.level || ' – ' || i.invoice_number AS beleg_ref,
                   c.name AS kunde, i.total_gross + m.fee_amount AS betrag,
                   m.pdf_path, 'mahnung' AS beleg_type, FALSE AS is_storno,
                   m.invoice_id
            FROM mahnungen m
            JOIN invoices i ON i.id = m.invoice_id
            JOIN customers c ON c.id = i.customer_id
            WHERE m.pdf_path IS NOT NULL";
    $params = [];
    if ($invoice_id) { $sql .= " AND m.invoice_id = :iid"; $params[':iid'] = $invoice_id; }
    if ($filter_from) { $sql .= " AND m.mahnung_date >= :from"; $params[':from'] = $filter_from; }
    if ($filter_to)   { $sql .= " AND m.mahnung_date <= :to";   $params[':to']   = $filter_to;   }
    if ($filter_q)    { $sql .= " AND (i.invoice_number ILIKE :q OR c.name ILIKE :q2)";
                        $params[':q'] = '%' . $filter_q . '%'; $params[':q2'] = '%' . $filter_q . '%'; }
    try {
        $stmt = $pdo->prepare($sql);
        $stmt->execute($params);
        $belege = array_merge($belege, $stmt->fetchAll(PDO::FETCH_ASSOC));
    } catch (\PDOException $e) {
        // Tabelle noch nicht migriert
    }
}

// Sortieren: neueste zuerst
usort($belege, fn($a, $b) => strcmp($b['beleg_date'], $a['beleg_date']));

$type_labels = ['rechnung' => 'Rechnung', 'ausgabe' => 'Ausgabe', 'mahnung' => 'Mahnung'];
$type_colors = ['rechnung' => 'var(--accent)', 'ausgabe' => 'var(--info)', 'mahnung' => 'var(--warning)'];
?>
<!doctype html>
<html lang="de">
<head>
    <meta charset="utf-8">
    <title>Belegarchiv</title>
    <link rel="stylesheet" href="assets/style.css">
</head>
<body>
<header>
    <h1>PIRP</h1>
    <nav>
        <a href="<?= url_for('index.php') ?>"><?= icon_dashboard() ?>Dashboard</a>
        <a href="<?= url_for('invoices.php') ?>"><?= icon_invoices() ?>Rechnungen</a>
        <a href="<?= url_for('customers.php') ?>"><?= icon_customers() ?>Kunden</a>
        <a href="<?= url_for('expenses.php') ?>"><?= icon_expenses() ?>Ausgaben</a>
        <a href="<?= url_for('belegarchiv.php') ?>" class="active"><?= icon_archive() ?>Belege</a>
        <a href="<?= url_for('journal.php') ?>"><?= icon_journal() ?>Journal</a>
        <a href="<?= url_for('euer.php') ?>"><?= icon_euer() ?>EÜR</a>
        <a href="<?= url_for('settings.php') ?>"><?= icon_settings() ?>Einstellungen</a>
        <a href="<?= url_for('logout.php') ?>"><?= icon_logout() ?>Logout (<?= htmlspecialchars($_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>
    <form method="get" class="filters">
        <label>Typ:
            <select name="type">
                <option value="all" <?= $filter_type === 'all' ? 'selected' : '' ?>>Alle</option>
                <option value="rechnung" <?= $filter_type === 'rechnung' ? 'selected' : '' ?>>Rechnungen</option>
                <option value="ausgabe" <?= $filter_type === 'ausgabe' ? 'selected' : '' ?>>Ausgaben</option>
                <option value="mahnung" <?= $filter_type === 'mahnung' ? 'selected' : '' ?>>Mahnungen</option>
            </select>
        </label>
        <label>Suche:
            <input type="text" name="q" value="<?= htmlspecialchars($filter_q) ?>" placeholder="Nr., Beschreibung, Kunde...">
        </label>
        <label>Von:
            <input type="date" name="from" value="<?= htmlspecialchars($filter_from) ?>">
        </label>
        <label>Bis:
            <input type="date" name="to" value="<?= htmlspecialchars($filter_to) ?>">
        </label>
        <button type="submit">Filtern</button>
        <a href="<?= url_for('belegarchiv.php') ?>">Zurücksetzen</a>
    </form>

    <section>
        <h2>Belegarchiv
            <span style="font-weight:normal;font-size:12px;color:var(--text-muted);"><?= count($belege) ?> Dokument(e)</span>
        </h2>

        <?php if (empty($belege)): ?>
            <p style="color:var(--text-muted);">Keine Belege gefunden.</p>
        <?php else: ?>
        <table class="list">
            <thead>
            <tr>
                <th>Datum</th>
                <th>Typ</th>
                <th>Referenz / Beschreibung</th>
                <th>Kunde</th>
                <th style="text-align:right;">Betrag</th>
                <th>PDF</th>
            </tr>
            </thead>
            <tbody>
            <?php foreach ($belege as $b): ?>
            <tr>
                <td><?= date('d.m.Y', strtotime($b['beleg_date'])) ?></td>
                <td>
                    <span style="font-size:10px;color:<?= $type_colors[$b['beleg_type']] ?? 'var(--text)' ?>;">
                        <?= $type_labels[$b['beleg_type']] ?? $b['beleg_type'] ?>
                        <?php if (!empty($b['is_storno'])): ?>
                            <span style="color:var(--error);"> · STORNO</span>
                        <?php endif; ?>
                    </span>
                </td>
                <td><?= htmlspecialchars($b['beleg_ref']) ?></td>
                <td style="color:var(--text-muted);"><?= htmlspecialchars($b['kunde']) ?></td>
                <td style="text-align:right;font-family:var(--font-mono);font-size:12px;">
                    <?= number_format((float)$b['betrag'], 2, ',', '.') ?> €
                </td>
                <td>
                    <?php if ($b['beleg_type'] === 'rechnung'): ?>
                        <a href="<?= url_for('invoice_pdf.php?id=' . $b['id']) ?>" target="_blank">PDF</a>
                    <?php elseif ($b['beleg_type'] === 'ausgabe'): ?>
                        <a href="<?= url_for('expense_file.php?id=' . $b['id']) ?>" target="_blank">PDF</a>
                    <?php elseif ($b['beleg_type'] === 'mahnung'): ?>
                        <a href="<?= url_for('mahnung_pdf.php?id=' . $b['id']) ?>" target="_blank">PDF</a>
                    <?php endif; ?>
                </td>
            </tr>
            <?php endforeach; ?>
            </tbody>
        </table>
        <?php endif; ?>
    </section>
</main>
<script src="assets/command-palette.js"></script>
</body>
</html>