<?php
/**
 * Einmalige Migration: Spalten hinzufügen und PDFs generieren
 */
if (PHP_SAPI !== 'cli') {
    die("Nur CLI.\n");
}

require_once __DIR__ . '/../src/config.php';
require_once __DIR__ . '/../src/db.php';

$pdo = get_db();

echo "1. Prüfe/erstelle Spalten...\n";

// Spalten hinzufügen falls nicht vorhanden
$migrations = [
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS pdf_path TEXT",
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS pdf_hash VARCHAR(64)",
    "ALTER TABLE invoices ADD COLUMN IF NOT EXISTS pdf_generated_at TIMESTAMPTZ",
];

foreach ($migrations as $sql) {
    try {
        $pdo->exec($sql);
        echo "   OK: $sql\n";
    } catch (PDOException $e) {
        echo "   FEHLER: " . $e->getMessage() . "\n";
    }
}

// Index erstellen
try {
    $pdo->exec("CREATE INDEX IF NOT EXISTS idx_invoices_pdf_path ON invoices(pdf_path) WHERE pdf_path IS NULL");
    echo "   OK: Index erstellt\n";
} catch (PDOException $e) {
    // Index existiert möglicherweise schon
}

echo "\n2. Generiere PDFs für alte Rechnungen...\n";

require_once __DIR__ . '/../src/pdf_functions.php';

// Verzeichnis erstellen
$uploadDir = __DIR__ . '/../public/uploads/invoices';
if (!is_dir($uploadDir)) {
    mkdir($uploadDir, 0775, true);
    echo "   Verzeichnis erstellt: $uploadDir\n";
}

$stmt = $pdo->query("SELECT id, invoice_number FROM invoices WHERE pdf_path IS NULL ORDER BY id");
$invoices = $stmt->fetchAll(PDO::FETCH_ASSOC);

echo "   Gefunden: " . count($invoices) . " Rechnungen ohne PDF\n\n";

$success = 0;
$failed = 0;

foreach ($invoices as $inv) {
    echo "   Verarbeite {$inv['invoice_number']}... ";

    $result = archive_invoice_pdf($inv['id']);

    if ($result) {
        echo "OK -> $result\n";
        $success++;
    } else {
        echo "FEHLER\n";
        $failed++;
    }
}

echo "\n=== Migration abgeschlossen ===\n";
echo "Erfolgreich: $success\n";
echo "Fehlgeschlagen: $failed\n";